JPH11177935A - Video signal reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the inexpensive video signal reproducing device that is able to noninterlace conversion processing is conducted with high stability without using a video signal that is converted once into an interlace scanning video signal by discriminating a source signal comes from a film or a video tape in the video signal reproducing device that applies progressive scanning reproduction to a transferred video signal of various video information such as a movie source and a video source like a DVD and a satellite broadcast. SOLUTION: A progressive scanning conversion circuit 23 stores a received head field to a 3rd memory 13 in response to a frame switching timing signal resulting from recognizing it that a received digital video signal comes from a film source depending on the presence of a field repeat signal output. Then a 2nd field is stored in the 3rd memory 13, and both information is read at a double speed for each line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal reproducing apparatus for transferring various video information such as a movie material and a video material such as a DVD and a satellite broadcast and sequentially scanning and reproducing the video signal.

[0002]

2. Description of the Related Art Conventionally, video output of DVDs and satellite broadcasts is usually output by interlaced scanning so that it can be reproduced by a television receiver. With the spread of video signals and the like, video signal reproducing devices for converting these interlaced video signals into sequential scanning signals are being introduced.

FIG. 17 is a block diagram showing a configuration of a conventional video signal reproducing apparatus. In FIG. 17, reference numeral 1 denotes a disk, in which a main video signal composed of either a video signal obtained by converting a film material video into an electrical signal or a video signal using a video signal as a material is encoded in a signal form suitable for recording in advance. It is modulated and recorded. Reference numeral 2 denotes a pickup, which converts a signal recorded on the disk 1 into an electric signal. Reference numeral 3 denotes a disk rotating device which rotates the disk 1 at a rotation speed suitable for reproduction. Reference numeral 4 denotes an interlaced scanning video signal reproducing circuit which demodulates a main video signal recorded on the disc 1,
The signal is decoded and output as an interlaced video signal. Reference numeral 5 denotes a first memory, which functions as a buffer memory when an interlaced video signal is reproduced. Reference numeral 6 denotes an NTSC encoder which converts an interlaced scanning video signal into an NTSC video format and outputs it. Reference numeral 7 denotes an interlaced scanning video output terminal from which an interlaced scanning video output electrical signal reproduced from the terminal is output. Reference numeral 8 denotes a video input terminal from which an interlaced scanning video signal is input. Reference numeral 9 denotes an A / D converter, which converts an input interlaced scanning video signal into a digital video signal. Reference numeral 10 denotes a video type determination circuit which determines whether the input interlaced video signal is a video signal of a film material or a video signal of a video material. Reference numeral 11 denotes a second memory, which has a capability of storing video signals for two fields, and is used for the determination operation of the video type determination circuit 10. Reference numeral 12 denotes a progressive scan conversion circuit which converts the output of the A / D converter 9 into a progressive scan video signal and outputs the signal. 13
Is a third memory capable of storing video signals for one field, and is used for the operation of the progressive scan conversion circuit 12. Reference numeral 14 denotes a D / A converter, which converts the output of the sequential scan conversion circuit 12 into an analog value and outputs the analog value. Reference numeral 15 denotes a progressive scanning video output terminal from which a progressive scanning video signal is output to a video display device (not shown).

[0004] The operation of the conventional video signal reproducing apparatus configured as described above will be further described.

FIG. 18 is a schematic diagram showing an interlaced scanning video signal and a progressive scanning video signal of the video signal reproducing apparatus. In the interlaced scanning video signal, an image of one field is formed in 1/60 second, and two images are combined to form an image of one frame. The number of vertical pixels in each of the two fields is 240
The pixels are arranged so as to fill the space between the pixels in the vertical direction. In the progressive scanning video signal, one frame is 1/60 second and the number of vertical pixels is 480.

As described above, the vertical frequency of both scanning video signals is 1/60 second, and the number of horizontal scanning lines is twice as large as that of interlaced scanning video signals. Is about 15.75 KHz, while the progressive scanning video signal is about 31.5 KH
z.

FIG. 19 is a schematic diagram showing the structure of a video signal recorded on a disk 1 of a conventional video signal reproducing apparatus.
As shown in FIG. 19, there are two types of video signals recorded on the disc 1. That is, FIG. 19A shows the case of a film material. In this case, the original material is 2 / sec.
This is a film image composed of pictures of four frames, and is compressed as an image of 720 horizontal dots and 480 vertical dots for each frame and recorded on the disk 1. FIG. 19B shows a case of a video material image. In this case, the original material is an interlaced scan image of 30 frames / 60 fields per second. Each frame is an image of 720 horizontal dots and 480 vertical dots, but since it is interlaced, each field becomes an image of 720 horizontal dots and 240 vertical dots, and is compressed and recorded on the disk 1.

The pickup 2 converts the signal of the disk 1 recorded as described above into an electric signal, and the interlaced scanning video signal reproducing circuit 4 reproduces the electric signal.

FIG. 20 is a schematic diagram showing a reproduced signal on a film material disk of a conventional video signal reproducing apparatus.

If the material of the video signal recorded on the disk 1 is a film, as shown in FIG. 1A, an image of 720 frames horizontally and 480 dots vertically is recorded at 24 frames per second as recording information. I have. The frame number is ...
are recorded in the order of n, n + 1, n + 2, n + 3,... The interlaced scanning video signal reproducing circuit 4 converts the film material signal recorded in this manner into interlaced scanning video and outputs it. This is because a television monitor is generally most often used as an image display device for viewing at home, and its display format is interlaced scanning. Further, the television monitor has a rate of 30 frames / 60 fields per second. Since it is designed to handle moving images, the interlaced scanning video signal reproducing circuit 4 simultaneously operates at 24
The frame image is converted into an interlaced scan image of 30 frames / 60 fields per second and output. The interlaced scanning video signal reproducing circuit 4 oddly converts each frame of the recording information in FIG. 20A like the interlaced scanning reproduced video signal shown in FIG.
And even, two interlaced scan field images are displayed, and the first field is repeatedly displayed after the last field for each frame, so that 24 frames per second film image is interlaced at 30 frames / 60 fields per second. Convert to an image and output. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 4 reproduces an image.

The NTSC encoder 6 converts the thus reproduced interlaced scanning reproduced video signal into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7.
A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the film material video converted into the interlaced scanning video.

Further, the NT input from the video input terminal 8
The SC standard video signal is input to an A / D converter 9, converted into a digital signal, and input to a video type determination circuit 10 and a progressive scan conversion circuit 12. Video type discriminating circuit 1
At 0, it is determined whether the input video signal is a film material or a video material. In other words, if the input video signal is a signal converted from film to video, the first field is repeated after the last field for each frame from the beginning, so the same is performed once every five fields. The field will appear. Therefore, the video type discriminating circuit 10 stores the second memory 1
1, the input digitized video signal is delayed by two fields as in the second memory output shown in FIG. 20C, and the output of the second memory 11 and the input video signal Find a match for. This match detection is shown in FIG.
0 (d) in the field comparison information,
In this way, it becomes "1" every five fields. Therefore, when detecting that the field comparison information changes every five fields, the video type determination circuit 10 determines that the material of the video signal is a film.

A progressive scan conversion circuit 12 performs progressive scan video conversion of a film material based on the field comparison information and the type determination signal input from the video type determination circuit 10. In other words, in the case of a film material, each frame of each material originally has a width of 72 mm.
Since an image of 0 dots and 480 dots in the vertical direction is divided into two fields of 720 dots in the horizontal direction and 240 dots in the vertical direction, these may be synthesized again. At this time, since a frame switching timing signal is required, as shown in FIG. 20, two fields and three fields are obtained from the field comparison information (FIG. 20D) and the vertical synchronization signal (FIG. 20E). The repetitive frame switching timing signal is generated internally by the progressive scan conversion circuit 12, and thereby detects the frame switching timing of the film signal used as the material of the input digital video signal. In response to the frame switching timing signal (FIG. 14F), the progressive scan conversion circuit 12 stores the first field of the progressive scan conversion circuit input shown in FIG.
The second field is stored in the third memory 13, and the information of both is alternately read out at a double speed line by line.
The output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 14 and output from the progressive scanning video output terminal 15. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video output terminal 15 so that the user can watch the film material video returned to the progressive scan video.

FIG. 21 is a schematic diagram showing a reproduced signal on a video material disk of a conventional video signal reproducing apparatus.

When the material of the video signal recorded on the disc 1 is a film, as shown in FIG. 21A, the recording information is an interlaced scanning image of 30 frames / 60 fields per second, and each field is 720 horizontal. Dot, length 24
An image of 0 dot is recorded. The frame number is ...
.., m, m + 1, m + 2, m + 3, m + 4,.
It is recorded in the order of. The interlaced scanning video signal reproducing circuit 4 outputs the video material signal recorded in this way as it is as the interlaced scanning reproduced video signal shown in FIG. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 4 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this manner into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the video material video converted into the interlaced scanning video.

Further, the NT input from the video input terminal 8
The SC standard video signal is converted into a digital signal by an A / D converter 9 and input to a video type discriminating circuit 10 and a progressive scan converting circuit 12. The video type determination circuit 10 determines whether the material of the input video signal is a film material or a video material. That is, as described above, if the input video signal is a signal converted from film to video, the first field is repeatedly output after the last field for each frame, so that five fields are output. The exact same field will appear once. Therefore, the video type discriminating circuit 10 uses the second memory 11 to delay the input digitized video signal by two fields as shown in the second memory output shown in FIG. 2 matches the output of the memory 11 with the input video signal. The coincidence detection is indicated by the field comparison information in FIG. 21D. In the case of a video material video signal, the signal does not become "1" every five fields. Therefore, if the change of the field comparison information cannot be detected every five fields, the video type determination circuit 10 determines that the material of the video signal is video.

The progressive scan conversion circuit 12 performs progressive scan video conversion of a digital video signal. That is, in the case of a video material, a sequentially-scanned video signal is generated using two pieces of field information, that is, field video information and a field located before it. At this time, vertical interpolation is performed using the data of the previous field for pixels having a small movement with respect to the previous field, and upper and lower pixels within the same field for pixels having a large movement with the previous field. By generating vertical interpolation data from the data, progressive scanning video conversion is performed. The converted video signal is converted into an analog signal by the D / A converter 14 and output from the progressive scanning video output terminal 15. The progressive scan video output terminal 15 is connected to a progressive scan video signal television monitor (not shown) so that the user can watch the video material video returned to the progressive scan video.

[0019]

However, in the conventional video signal reproducing apparatus, the field contents stored in the memory are used by using the memory for two fields based on the video signal once converted into the interlaced video signal. And the input of the video type discriminating circuit are detected,
It has the problem that it is not possible to provide a low-cost video signal playback device because it determines whether the material signal is a film or video and sequentially switches the conversion process, and it also converts analog video signals to digital video again. In order to determine whether the material signal is a film signal or a video signal, there has been a problem that the stability cannot be sufficiently increased due to the mixing of noise or the like. Therefore, it is required to introduce an inexpensive video signal reproducing apparatus capable of performing high-stability sequential conversion processing.

According to the present invention, it is possible to perform an inexpensive and highly stable sequential conversion process by determining whether a material signal is a film or a video without using a video signal once converted into an interlaced video signal. It is intended to provide a video signal reproducing device.

[0021]

SUMMARY OF THE INVENTION In order to solve this problem, a video signal reproducing apparatus according to the present invention discriminates a type of a field repeat signal or a main video signal generated when a film material is converted into an interlaced scanning video signal. The discrimination flag is used to discriminate whether the material signal is a film or a video.

With this, it is possible to determine whether the material signal is a film or a video without using the video signal once converted to the interlaced video signal, thereby eliminating the need for a memory for two fields and adding noise. Thus, it is possible to obtain an inexpensive and high-stability video signal reproducing apparatus capable of performing sequential conversion processing without deteriorating the stability of discriminating the material signal due to the above.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The first aspect of the present invention provides a first type of video signal obtained by converting a film material video into an electrical signal or a second type of video signal using a video signal as a material. A video signal reproducing apparatus for reproducing a main video signal from transfer information to which a main video signal is transferred, wherein the main video signal is a first type video signal or a second type video signal. A discriminating circuit for discriminating; a timing signal generating circuit for outputting a timing signal indicating a field to be repeatedly output when the discriminating circuit discriminates the main video signal as the first type video signal; If it is determined that the main video signal is the first type of video signal, the main video signal is converted into an interlaced scanning video signal of 60 fields per second in accordance with the output of the timing signal generation circuit and output. Interlaced scanning video signal reproduction circuit that outputs the main video signal as it is when it is determined that the main video signal is a video signal of the first type, and is inserted according to whether the main video signal is the first type of video signal or the second type of video signal A video signal reproducing apparatus comprising a progressive scan conversion circuit for changing a method of generating a scan signal, wherein a memory for two fields is not required, and without using a video signal once converted to analog. Provided is a video signal reproducing apparatus which is inexpensive and capable of performing high-stability sequential conversion processing in order to determine the material of a video signal and perform sequential scan conversion.

According to a second aspect of the present invention, in the video signal reproducing apparatus according to the first aspect, the progressive scan conversion circuit changes a method of generating an insertion scan signal in accordance with an output of the determination circuit. A video signal reproducing apparatus which is inexpensive and capable of performing high-stability sequential conversion processing by determining the type of a main video signal based on a circuit output and switching a method of generating an insertion signal.

According to a third aspect of the present invention, in the video signal reproducing apparatus according to the first aspect, the progressive scan conversion circuit changes a method of generating an insertion scan signal according to the presence or absence of a timing signal. Provided is an inexpensive video signal reproducing apparatus capable of performing high-stability sequential conversion processing by determining the type of a main video signal based on the presence or absence of a signal and switching the method of generating an insertion signal.

According to a fourth aspect of the present invention, there is provided a main image comprising either a first type of video signal obtained by converting a film material image into an electric signal or a second type of video signal using a video signal as a material. A video signal reproducing apparatus that reproduces a main video signal from transfer information transmitted by multiplexing a signal and a determination flag indicating whether the main video signal is a first video signal or a second type of video signal. A discrimination flag extraction circuit for extracting a discrimination flag from the transfer information; and a timing signal indicating a field to be repeatedly output when the discrimination flag indicates that the main video signal is a first type of video signal. And a main video signal according to the output of the timing signal generation circuit when the discrimination flag indicates that the main video signal is the first type of video signal. An interlaced scanning video signal which is converted and output as an interlaced scanning video signal of 60 fields per second and outputs the main video signal as it is when the discrimination flag indicates that the main video signal is the second type of video signal. And a progressive scan conversion circuit that changes a method of generating an insertion scan signal according to whether the main video signal is a first type video signal or a second type video signal. In order to determine the material of the video signal and perform sequential scan conversion without using the video signal once converted to analog,
Provided is a video signal reproducing apparatus which is inexpensive and can perform high-stability sequential conversion processing.

According to a fifth aspect of the present invention, in the video signal reproducing apparatus according to the fourth aspect, the progressive scan conversion circuit changes the method of generating the insertion scan signal in accordance with the output of the determination flag extraction circuit. By providing a video signal reproducing apparatus which is inexpensive and capable of performing high-stability sequential conversion processing by discriminating the type of a main video signal by a discrimination flag and switching the method of generating an insertion signal.

According to a sixth aspect of the present invention, in the video signal reproducing apparatus according to the fourth aspect, the progressive scan conversion circuit changes a method of generating an insertion scan signal according to the presence or absence of a timing signal. Provided is an inexpensive video signal reproducing apparatus capable of performing high-stability sequential conversion processing by determining the type of a main video signal based on the presence or absence of a timing signal and switching the method of generating an insertion signal.

According to a seventh aspect of the present invention, there is provided a main image comprising either a first type of video signal obtained by converting a film material image into an electric signal or a second type of video signal using a video signal as a material. When the main video signal is a video signal of the first type, when the main video signal is converted into an interlaced scanning video signal of 60 fields per second, a timing signal indicating a field which is repeatedly output is multiplexed. What is claimed is: 1. A video signal reproducing apparatus for reproducing a main video signal from transfer information to be transferred, comprising: a timing signal extracting circuit for extracting a timing signal from the transfer information; A discrimination circuit for discriminating whether the main video signal is the first type of video signal, and a main video signal in accordance with the timing signal if the discrimination circuit determines that the main video signal is the first type of video signal; An interlaced scanning video signal reproducing circuit for converting and outputting an interlaced scanning video signal of 60 fields per second and outputting the main video signal as it is when the discriminating circuit determines that the main video signal is the second type of video signal; A progressive scanning conversion circuit for changing a method of generating an insertion scanning signal according to whether the video signal is a first type video signal or a second type video signal. Inexpensive, high-stability sequential conversion processing is possible because no memory for two fields is required, and the material of the video signal is determined and sequentially scanned and converted without using the video signal once converted to analog. Provided is a video signal reproducing device.

The invention according to claim 8 is the video signal reproducing apparatus according to claim 7, wherein the progressive scan conversion circuit changes the method of generating the insertion scan signal according to the output of the discrimination circuit. A video signal reproducing apparatus which is inexpensive and capable of performing high-stability sequential conversion processing by determining the type of a main video signal based on a circuit output and switching a method of generating an insertion signal.

According to a ninth aspect of the present invention, in the video signal reproducing apparatus according to the seventh aspect, the progressive scan conversion circuit changes a method of generating an insertion scan signal according to the presence or absence of a timing signal. Provided is an inexpensive video signal reproducing apparatus capable of performing high-stability sequential conversion processing by determining the type of a main video signal based on the presence or absence of a timing signal and switching the method of generating an insertion signal.

According to a tenth aspect of the present invention, there is provided a main picture comprising either a first kind of video signal obtained by converting a film material picture into an electric signal or a second kind of video signal using a video signal as a material. A signal, a discrimination flag indicating whether the main video signal is a first video signal or a second video signal, and a main video signal when the main video signal is the first video signal. A video signal reproducing apparatus for reproducing a main video signal from transfer information which is multiplexed with a timing signal indicating a field which is repeatedly output when an image signal is converted into an interlaced scanning video signal of 60 fields per second, and A discrimination flag extraction circuit for extracting a discrimination flag from the transfer information; a timing signal extraction circuit for extracting a timing signal from the transfer information; If the signal indicates that the signal is a signal, the main video signal is converted into an interlaced scanning video signal of 60 fields per second in accordance with the timing signal and output. If it indicates that there is, an interlaced scanning video signal reproducing circuit that outputs the main video signal as it is, and an insertion scanning signal according to whether the main video signal is a first type video signal or a second type video signal. And a progressive scan conversion circuit for changing a generation method of the video signal, wherein a memory for two fields is not required, and the video signal is reproduced without using a video signal once converted to analog. The present invention provides an inexpensive video signal reproducing apparatus capable of performing high-stability sequential conversion processing in order to determine the material and perform sequential scan conversion.

The invention according to claim 11 is the video signal reproducing apparatus according to claim 10, wherein the progressive scan conversion circuit changes the method of generating the insertion scan signal according to the output of the discrimination flag extraction circuit. A video signal reproducing apparatus which is inexpensive and capable of performing high-stability sequential conversion processing by discriminating the type of a main video signal based on the output of a discrimination circuit and switching the method of generating an insertion signal.

According to a twelfth aspect of the present invention, in the video signal reproducing apparatus according to the tenth aspect, the sequential scan conversion circuit changes a method of generating an insertion scan signal according to the presence or absence of a timing signal.

According to a thirteenth aspect of the present invention, in the progressive scan conversion circuit, when the main video signal is a first type video signal,
The method is characterized in that a break in a frame of an original film material of a main video signal is detected based on a timing signal, and a field signal of an input interlaced scanning video signal is combined into two fields for each frame and converted into a sequential scanning signal. 13. A video signal reproducing apparatus according to any one of items 1 to 12, wherein the video signal reproducing apparatus is inexpensive and capable of performing high-stability sequential conversion processing.

According to a fourteenth aspect of the present invention, in the progressive scan conversion circuit, when the main video signal is a second type video signal,
A scanning signal is generated based on the horizontal scanning signal information before and after the field signal of the input interlaced scanning video signal or the horizontal scanning signal information of the preceding and succeeding fields, and interpolated between the scanning lines of the original field signal to sequentially output the scanning signal. 13. A video signal reproducing apparatus according to claim 1, wherein the video signal reproducing apparatus is capable of performing inexpensive and highly stable sequential conversion processing.

According to a fifteenth aspect of the present invention, in the video signal reproducing apparatus according to any one of the first to fourteenth aspects, the transfer information is information recorded in advance on an information recording medium. Provided is a video signal reproducing apparatus which is inexpensive and can perform high-stability sequential conversion processing.

According to a sixteenth aspect of the present invention, in the video signal reproducing apparatus according to any one of the first to fourteenth aspects, the transfer information is information transferred by a wireless or wired line. Provided is a video signal reproducing apparatus capable of performing high-constant sequential conversion processing.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of a video signal reproducing apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a disk, which encodes a main video signal composed of either a video signal obtained by converting a film material video into an electrical signal or a video signal using a video signal as a signal in a signal form suitable for recording in advance. It is modulated and recorded.
Reference numeral 2 denotes a pickup, which converts a signal recorded on the disk 1 into an electric signal. Reference numeral 3 denotes a disk rotating device which rotates the disk 1 at a rotation speed suitable for reproduction. Reference numeral 20 denotes an interlaced scanning video signal reproducing circuit which demodulates and decodes the main video signal recorded on the disk 1 and outputs the same as an interlaced scanning video signal. Reference numeral 5 denotes a first memory, which functions as a buffer memory when an interlaced video signal is reproduced. 6
Is an NTSC encoder which converts the interlaced video signal into NTSC
Convert to SC video format and output. Reference numeral 7 denotes an interlaced scanning video output terminal from which an interlaced scanning video output reproduced from this terminal is output. A discriminating circuit 21 discriminates the type of the main video signal recorded on the disk 1 from the output of the interlaced scanning video signal reproducing circuit 20. A field repeat signal generating circuit 22 generates a field repeat signal when the interlaced scanning video signal reproducing circuit 20 converts the main video signal into an interlaced scanning video signal when the main video signal is a film material. 23 is a progressive scan conversion circuit,
The output of the interlaced scanning video signal reproducing circuit 20 is converted into a progressive scanning video signal and output. 13 is a third memory, 1
It has the ability to store video signals for fields and is used for the operation of the progressive scan conversion circuit 23. Reference numeral 14 denotes a D / A converter, which converts the output of the sequential scan conversion circuit 23 into an analog value and outputs the analog value. Reference numeral 15 denotes a progressive scanning video output terminal from which a progressive scanning video signal is output to a video display device (not shown).

The operation of the video signal reproducing apparatus according to the first embodiment of the present invention configured as described above will be further described.

FIG. 2 shows a disc 1 according to the first embodiment of the present invention.
Is a schematic diagram showing the structure of a video signal recorded in the conventional technology, which is similar to that described with reference to FIG. 19 in the section of the related art. As shown in FIG. 2, the video signal recorded on the disk 1 has two forms. That is, (a) shown in FIG. 2 is a film material, and in this case, the original material is 2 per second.
This is a film image composed of pictures of four frames, and is compressed as an image of 720 horizontal dots and 480 vertical dots for each frame and recorded on the disk 1. FIG. 2B shows a video material image. In this case, the original material is an interlaced scan image of 30 frames / 60 fields per second. Each frame is an image of 720 horizontal dots and 480 vertical dots, but since it is interlaced, each field becomes an image of 720 horizontal dots and 240 vertical dots, and is compressed and recorded on the disk 1.

First, the case of reproducing a film material disc will be described with reference to the drawings. FIG. 3 shows Embodiment 1 of the present invention.
FIG. 8 is a schematic diagram showing a reproduction signal from a film material disk of FIG.

When the material of the video signal recorded on the disk 1 is a film, as shown in FIG. 3, an image of 720 frames horizontally and 480 dots vertically is recorded at 24 frames per second as shown in FIG. Interlaced scanning video signal reproduction circuit 2
0 reads the signal recorded on the disk 1 from the output of the pickup 2, extracts the frame period of the main video signal, and outputs it to the discrimination circuit 21. The determination circuit 21 determines the type of the main video signal from the frame period signal of the main video signal input from the interlaced scanning video signal reproduction circuit 20. That is, when the main video signal is a film material, the frame period is 24 frames per second, and when the main video signal is a video material, the frame period is 30 frames per second. This difference is detected and output to the interlaced scanning video signal reproducing circuit 20 and the field repeat signal generating circuit 22 as a discrimination signal. By the output of the discrimination circuit 21,
The interlaced scanning video signal reproducing circuit 20 recognizes that the main video signal recorded on the disc 1 is a film material. As shown in FIG. 3 (a), the film material images on the disc 1 have frame numbers..., N, n + 1, n + 2, n
+3,... Are recorded in this order. The interlaced scanning video signal reproducing circuit 20 converts the film material signal recorded in this way into interlaced scanning video and outputs it. This is because a television monitor is generally most often used as an image display device for viewing at home, and its display format is interlaced scanning. Further, the television monitor has a rate of 30 frames / 60 fields per second. Since it is designed to handle moving images, the interlaced scanning video signal reproducing circuit 20 simultaneously outputs 24 frames of video per second at 3 frames per second.
It is converted into a 0-frame / 60-field interlaced scanning video and output. The interlaced scanning video signal reproducing circuit 20 divides each frame of the recording information into two interlaced scanning field images, odd and even, as shown in the interlaced scanning reproduced video signal of FIG. In response to a field repeat signal (FIG. 3 (c)) which is output every 5 fields and which is output by the display 22, the first field is repeatedly displayed after the last field for each frame, so that a film image of 24 frames per second can be displayed. The image is converted into an interlaced scan image of 30 frames / 60 fields per second and output. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 20 reproduces an image. Interlaced scanning video signal reproduction circuit 2
0 outputs a frame switching timing signal to the sequential scan conversion circuit 23 as a frame switching timing signal as shown in FIG.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this way into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the film material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 20
Inputs the interlaced video signal to the progressive scan conversion circuit 23. The progressive scan conversion circuit 23 recognizes that the input digital video signal is a film material based on the presence or absence of the field repeat signal output of the field repeat signal generation circuit 22. That is, as described above, when the main video is a film material, the field repeat signal output from the field repeat signal generating circuit 22 changes in a 5-field cycle as shown in FIG. 3C, and the change is detected. , And performs sequential scanning video conversion on the assumption that the main video is a film material. In the case of a film material, since an image of 720 dots horizontally and 480 dots vertically is originally divided into two fields of 720 dots horizontally and 240 dots vertically for each frame of each material, these may be synthesized again. Therefore, the progressive scan conversion circuit 23 can detect the switching timing of the frame of the film signal used as the input digital video signal based on the frame switching timing signal shown in FIG. In response to the frame switching timing signal, the progressive scan conversion circuit 23
After the first field of the input of the progressive scan conversion circuit shown in FIG. 3E is stored in the third memory, the second field is stored in the third memory 13, and the information of both is read out at a double speed line by line. As a result, the output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 14 and output from the progressive scanning video signal output terminal 15. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video output terminal 15 so that the user can watch the film material video returned to the progressive scan video.

Next, the reproduction of a video material disc will be described with reference to the drawings. FIG. 4 is a schematic diagram showing a reproduced signal on the video material disc according to the first embodiment of the present invention.

When the material of the video signal recorded on the disk 1 is video, as shown in FIG. 4, the interlaced scan image of 30 frames / 60 fields per second as the recording information, each field is 720 dots wide and vertically An image of 240 dots is recorded. The interlaced scanning video signal reproducing circuit 20 reads the signal recorded on the disc 1 from the output of the pickup 2, extracts the frame period of the main video signal, and outputs it to the discriminating circuit 21. The discriminating circuit 21 detects that the main video signal is a video material from the frame period signal of the main video signal input from the interlaced scanning video signal reproducing circuit 20, and determines that the interlaced scanning video signal reproducing circuit 20 and the field repeater Signal generation circuit 2
Output to 2. As shown in FIG. 4 (a), the video material video on the disc 1 has frame numbers..., M, m + 1,
m + 2, m + 3, m + 4,... The interlaced scanning video signal reproducing circuit 20 outputs the video material signal recorded in this manner as an interlaced scanning reproduced video signal as shown in FIG. 4B. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 20 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this way into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the video material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 20
Inputs the interlaced video signal to the progressive scan conversion circuit 23. The progressive scan conversion circuit 23 determines whether or not the field repeat signal generation circuit 22 outputs a field repeat signal. It recognizes that the input digital video signal is a video material. That is, when the main video is a video material, the field repeat signal output from the field repeat signal generating circuit 22 does not change in a 5-field cycle as shown in FIG. The sequential scanning video conversion is performed assuming the material. That is, in the case of a video material, a sequentially-scanned video signal is generated using two pieces of field information, that is, field video information and a field located before it. At this time, the progressive scan conversion circuit 23
Is vertically interpolated using the data of the previous field with respect to a pixel having a small motion with respect to the previous field input to the progressive scan conversion circuit shown in FIG. 4E, and the motion with the previous field is large. For the pixels, vertical interpolation data is generated from the upper and lower pixel data in the same field to obtain the output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 14 and output from the progressive scanning video output terminal 15.
The progressive scan video output terminal 15 is connected to a progressive scan video signal television monitor (not shown) so that the user can watch the video material video returned to the progressive scan video.

(Embodiment 2) FIG. 5 is a block diagram showing a configuration of a video signal reproducing apparatus according to Embodiment 2 of the present invention. In FIG. 5, reference numeral 1 denotes a disc, a main video signal composed of either a video signal obtained by converting a film material video into an electric signal or a video signal using a video signal as a material, and whether the main video signal is a film material or a video material. Is encoded in a signal form suitable for recording in advance, modulated, and recorded. Reference numeral 2 denotes a pickup, which converts a signal recorded on the disk 1 into an electric signal. Reference numeral 3 denotes a disk rotating device which rotates the disk 1 at a rotation speed suitable for reproduction. Reference numeral 30 denotes an interlaced scanning video signal reproducing circuit which demodulates and decodes the main video signal recorded on the disk 1 and outputs it as an interlaced scanning video signal.
Reference numeral 5 denotes a first memory, which functions as a buffer memory when an interlaced video signal is reproduced. Reference numeral 6 denotes an NTSC encoder which converts an interlaced scanning video signal into an NTSC video format and outputs it. Reference numeral 7 denotes an interlaced scanning video output terminal from which an interlaced scanning video output reproduced from this terminal is output. A discrimination circuit 31 discriminates the type of the main video signal recorded on the disc 1 from the output of the pickup 2. A field repeat signal generating circuit 22 generates a field repeat signal when the interlaced scanning video signal reproducing circuit 30 converts the main video signal into an interlaced scanning video signal when the main video signal is a film material. Reference numeral 33 denotes a progressive scan conversion circuit, which is an interlaced scan video signal reproduction circuit 3
0 is converted into a progressively scanned video signal and output. Reference numeral 13 denotes a third memory, which has a capability of storing a video signal for one field, and is used for the operation of the progressive scan conversion circuit 33. Reference numeral 14 denotes a D / A converter, which is a progressive scan conversion circuit 3
3 is converted to an analog value and output. Reference numeral 15 denotes a progressive scanning video output terminal, from which a video display device (not shown) is provided.
Sequentially outputs a scanning video signal.

The operation of the video signal reproducing apparatus according to the second embodiment of the present invention configured as described above will be further described.

FIG. 6 shows a disc 1 according to the second embodiment of the present invention.
FIG. 3 is a schematic diagram showing a structure of a video signal recorded in the video signal. Although described in FIG. 2 in the column of Embodiment 1, as shown in FIG.
There are two types of video signals recorded on the disc 1. That is, FIG. 6A shows the form of a film material. In this case, the original material is a film image composed of pictures at 24 frames per second.
The image is compressed and recorded on the disk 1 together with the determination flag (= 1) as an image of 480 dots vertically. FIG. 6 (b)
Is a form of a video material image, in which case the original material is an interlaced scan image of 30 frames / 60 fields per second. Each frame is 720 dots wide and 480 vertical.
Although the image is a dot image, the image is interlaced, so that each field becomes an image of 720 horizontal dots and 240 vertical dots, and is compressed and recorded on the disk 1 together with the discrimination flag (= 0). The difference from the first embodiment is that a discrimination flag that is recorded on the disc 1 and indicates a material is used.

First, the case of reproducing a film material disc will be described with reference to the drawings. FIG. 7 shows Embodiment 2 of the present invention.
FIG. 8 is a schematic diagram showing a reproduction signal from a film material disk of FIG.

When the material of the video signal recorded on the disc 1 is a film, as shown in FIG. 7, an image of 720 frames horizontally and 480 dots vertically is recorded at 24 frames per second as recording information. The discrimination circuit 31 reads the discrimination flag recorded on the disk 1 from the signal input from the pickup 2 and performs the interlaced scanning video signal reproduction circuit 30.
Is output to the field repeat signal generation circuit 22. Based on the output of the determination circuit 31, the interlaced scanning video signal reproduction circuit 30 recognizes that the main video signal recorded on the disk 1 is a film material. As shown in FIG. 7 (a), the film material image on the disk 1 has the frame number...
, N, n + 1, n + 2, n + 3,... The interlaced scanning video signal reproducing circuit 30 converts the film material signal recorded in this way into interlaced scanning video and outputs it. This is because a television monitor is generally most often used as an image display device for viewing at home, and its display format is interlaced scanning. Further, the television monitor has a rate of 30 frames / 60 fields per second. At the same time, the interlaced scanning video signal reproducing circuit 30 converts an image of 24 frames per second into an interlaced scanning image of 30 frames / 60 fields per second and outputs the interlaced scanning video because it is designed to handle moving images. The interlaced scanning video signal reproducing circuit 30 converts each frame of the recording information into odd and e as shown in the interlaced scanning reproduced video signal in FIG.
ven into two interlaced scan field images, and further, as shown in FIG. 7C, the first field for each frame according to the field repeat signal output every five fields output by the field repeat signal generation circuit 22. Is repeatedly displayed after the last field, thereby converting a film image of 24 frames per second into an interlaced scan image of 30 frames / 60 fields per second and outputting it. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 30 reproduces an image. The interlaced scanning video signal reproducing circuit 30 determines the frame delimiter of the interlaced scanning video signal generated in this way as shown in FIG.
As shown in (d), it outputs to the sequential scanning conversion circuit 33 as a frame switching timing signal.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this manner into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the film material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 30
Inputs the interlaced video signal to the progressive scan conversion circuit 33. The progressive scan conversion circuit 33 recognizes from the output of the discrimination circuit 31 that the input digital video signal is a film material. That is, in the case of a film material, an image of 720 dots horizontally and 480 dots vertically is originally divided into two fields of 720 dots horizontally and 240 dots vertically for each frame of each material. .
The progressive scan conversion circuit 33 can detect the switching timing of the frame of the film signal used as the material of the input digital video signal based on the frame switching timing signal shown in FIG. In response to the frame switching timing signal, the progressive scan conversion circuit 33
After storing the first field of the input of the progressive scan conversion circuit shown in (e) in the third memory 13, the second field is stored in the third memory 13, and the information of both is read out at a double speed line by line. , And the output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 14 and output from the progressive scanning video output terminal 15. Progressive scan video output terminal 15
Is connected to a television monitor (not shown) for a progressive scanning video signal, so that the user can watch the film material video returned to the progressive scanning video.

Next, the reproduction of a video material disc will be described with reference to the drawings. FIG. 8 is a schematic diagram showing a reproduced signal on the video material disc according to the second embodiment of the present invention.

If the material of the video signal recorded on the disk 1 is video, as shown in FIG. 8, the interlaced scan image of 30 frames / 60 fields per second as recording information, each field is 720 dots wide and vertically An image of 240 dots is recorded. The discrimination circuit 31 is the pickup 2
The discrimination flag recorded on the disc 1 is read from a signal input from the
0 is output to the field repeat signal generation circuit 22.
Based on the output of the determination circuit 31, the interlaced scanning video signal reproduction circuit 30 recognizes that the main video signal recorded on the disk 1 is a video material. As shown in FIG. 8 (a), the disk 1 has video material images with frame numbers.
, M, m + 1, m + 2, m + 3, m + 4,... The interlaced scanning video signal reproducing circuit 30 outputs the video material signal recorded in this manner as an interlaced scanning reproduced video signal shown in FIG. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 30 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this manner into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the video material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 30
Inputs the interlaced video signal to the progressive scan conversion circuit 33. The progressive scanning conversion circuit 33 recognizes that the main video signal recorded on the disk 1 is a video material from the output of the discrimination circuit 31, and performs the progressive scanning video conversion on the assumption that the main video is a video material. That is, in the case of a video material, the field video information and the field
A progressive scanning video signal is generated using the two pieces of field information. At this time, the progressive scan conversion circuit 33 vertically interpolates, using the data of the previous field, a pixel having a small movement between the previous field and the previous field shown in FIG. 8 (f) is obtained by generating vertical interpolation data from upper and lower pixel data in the same field. The converted video signal is converted into an analog signal by the D / A converter 14 and output from the progressive scanning video output terminal 15. Progressive scan video output terminal 1
5 is a TV monitor (not shown) for a progressive scanning video signal.
Is connected, so that the user can watch the video material image returned to the progressively scanned image.

(Embodiment 3) FIG. 9 is a block diagram showing a configuration of a video signal reproducing apparatus according to Embodiment 3 of the present invention. In FIG. 9, reference numeral 1 denotes a disk, and when a main video signal composed of either a video signal obtained by converting a film material video into an electric signal or a video signal using a video signal as a material and the main video signal is a film material, When a main video signal is converted into an interlaced scanning video signal, a field repeat signal indicating the timing of a field repeatedly output is encoded in a signal form suitable for recording in advance, modulated, and recorded. Reference numeral 2 denotes a pickup, which converts a signal recorded on the disk 1 into an electric signal. Reference numeral 3 denotes a disk rotating device which rotates the disk 1 at a rotation speed suitable for reproduction. Reference numeral 30 denotes an interlaced scanning video signal reproducing circuit which demodulates and decodes the main video signal recorded on the disk 1 and outputs it as an interlaced scanning video signal. Reference numeral 5 denotes a first memory, which functions as a buffer memory when an interlaced video signal is reproduced. Reference numeral 6 denotes an NTSC encoder which converts an interlaced scanning video signal into an NTSC video format and outputs it. Reference numeral 7 denotes an interlaced scanning video output terminal from which an interlaced scanning video output reproduced from this terminal is output. 41
Is a field repeat signal extraction circuit, and pickup 2
, A field repeat signal recorded on the disc 1 is extracted. Reference numeral 42 denotes a discrimination circuit for discriminating the type of the main video signal recorded on the disc 1 based on a change in the output of the field repeat signal extraction circuit 41. A progressive scanning conversion circuit 33 converts the output of the interlaced scanning video signal reproducing circuit 30 into a progressive scanning video signal and outputs it. Reference numeral 13 denotes a third memory, which has a capability of storing a video signal for one field, and is used for the operation of the progressive scan conversion circuit 33.
Reference numeral 14 denotes a D / A converter, which converts the output of the sequential scan conversion circuit 33 into an analog value and outputs the analog value. Reference numeral 15 denotes a progressive scanning video output terminal from which a progressive scanning video signal is output to a video display device (not shown).

The operation of the video signal reproducing apparatus according to the third embodiment of the present invention configured as described above will be further described.

FIG. 10 is a schematic diagram showing the structure of a video signal recorded on the disk 1 according to the third embodiment of the present invention. As shown in FIG. 10, the video signal recorded on the disk 1 has two forms. That is, FIG. 10A shows the form of a film material. In this case, the original material is 24
This is a film image composed of a picture of a frame, and is recorded on the disk 1 as an image of 720 dots horizontally and 480 dots vertically for each frame together with a field repeat signal. FIG. 10B shows a form of a video material image. In this case, the original material is 30 frames / sec.
This is an interlaced scan image of field 0. Each frame is an image of 720 horizontal dots and 480 vertical dots, but since it is interlaced scanning, each field becomes an image of 720 horizontal dots and 240 vertical dots, and is compressed and recorded on the disk 1 together with a field repeat signal (= 0). Is done.

First, the case of reproducing a film material disc will be described with reference to the drawings. FIG. 11 is a schematic diagram showing a reproduction signal from the film material disk according to the third embodiment of the present invention.

When the material of the video signal recorded on the disc 1 is a film, as shown in FIG. 11, an image of 720 frames horizontally and 480 dots vertically and a field repeat signal are recorded at 24 frames per second as shown in FIG. Have been. The field repeat signal extraction circuit 41 reads the field repeat signal recorded on the disc 1 from the signal input from the pickup 2 and outputs the signal to the interlaced scanning video signal reproduction circuit 30 and the discrimination circuit 42. Determination circuit 42
Detects that the field repeat signal changes every five fields, and recognizes that the main video signal recorded on the disc 1 is a film material. As shown in FIG. 11A, film material images are recorded on the disk 1 in the order of frame numbers..., N, n + 1, n + 2, n + 3,. The interlaced scanning video signal reproducing circuit 30 converts the film material signal recorded in this way into interlaced scanning video and outputs it. This is because a television monitor is generally most often used as an image display device for viewing at home, and its display format is interlaced scanning. Further, the television monitor has a rate of 30 frames / 60 fields per second. At the same time, the interlaced scanning video signal reproducing circuit 30 converts an image of 24 frames per second into an interlaced scanning image of 30 frames / 60 fields per second and outputs the interlaced scanning video because it is designed to handle moving images. The interlaced scanning video signal reproducing circuit 30 converts each frame of the recording information to o as shown in the interlaced scanning reproduced video signal of FIG.
dd and even are divided into two interlaced scanning field images, and further, the first field is set for each frame according to a field repeat signal (FIG. 9C) which is output every five fields and output by the field repeat signal extraction circuit 41. Is repeatedly displayed after the last field, thereby converting a film image of 24 frames per second into an interlaced scan image of 30 frames / 60 fields per second and outputting it. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 30 reproduces an image. The interlaced scanning video signal reproducing circuit 30 performs frame demarcation of the interlaced scanning video signal generated in this manner as shown in FIG.
As shown in FIG. 1 (d), the signal is output to the sequential scan conversion circuit 33 as a frame switching timing signal.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this way into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the film material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 30
Inputs the interlaced video signal to the progressive scan conversion circuit 33. The progressive scan conversion circuit 33 recognizes from the output of the discrimination circuit 42 that the input digital video signal is a film material. That is, in the case of a film material, an image of 720 dots horizontally and 480 dots vertically is originally divided into two fields of 720 dots horizontally and 240 dots vertically for each frame of each material. .
The progressive scan conversion circuit 33 can detect the switching timing of the frame of the film signal used as the material of the input digital video signal, based on the frame switching timing signal shown in FIG. In accordance with the frame switching timing signal, the progressive scan conversion circuit 33
After the first field of the input of the progressive scan conversion circuit shown in FIG. 11E is stored in the third memory 13, the second field is stored in the third memory 13, and the information of both is read out at a double speed line by line. As a result, the output of the progressive scan conversion circuit shown in FIG. The converted video signal is D
The signal is converted into an analog signal by the / A converter 14 and output from the progressive scanning video output terminal 15. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video output terminal 15 so that the user can watch the film material video returned to the progressive scan video.

Next, the reproduction of a video material disc will be described with reference to the drawings. FIG. 12 is a schematic diagram showing a reproduced signal from a video material disc according to Embodiment 3 of the present invention.

When the material of the video signal recorded on the disk 1 is video, as shown in FIG. 12, the recording information is an interlaced scan image of 30 frames / 60 fields per second. An image of 240 dots is recorded. The discrimination circuit 42 detects that the field repeat signal does not change every five fields, and recognizes that the main video signal recorded on the disc 1 is a video material. By the output of the determination circuit 42,
The interlaced scanning reproduction circuit 30 recognizes that the main video signal recorded on the disk 1 is a video material. FIG.
As shown in FIG. 2 (a), the disk 1 has video material images having frame numbers..., M, m + 1, m + 2, m + 3,
m + 4,... are recorded in this order. The interlaced scanning video signal reproducing circuit 20 outputs the video material signal thus recorded as the interlaced scanning reproduced video signal of FIG. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 20 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this way into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the video material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 30
Inputs the interlaced video signal to the progressive scan conversion circuit 33. The progressive scan conversion circuit 33 recognizes that the main video signal recorded on the disk 1 is a video material from the output of the discrimination circuit 42, and performs progressive scan video conversion on the assumption that the main video is a video material. That is, in the case of a video material, the field video information and the field
A progressive scanning video signal is generated using the two pieces of field information. At this time, the progressive scan conversion circuit 33 vertically interpolates the pixels having a small motion between the previous field and the previous field of the progressive scan conversion circuit in FIG. 12 (f) is obtained by generating vertical interpolation data from upper and lower pixel data in the same field. The converted video signal is D /
The signal is converted into an analog signal by the A converter 14 and output from the progressive scanning video output terminal 15. The progressive scan video output terminal 15 is connected to a progressive scan video signal television monitor (not shown) so that the user can watch the video material video returned to the progressive scan video.

(Embodiment 4) FIG. 13 is a block diagram showing a configuration of a video signal reproducing apparatus according to Embodiment 4 of the present invention. In FIG. 13, reference numeral 1 denotes a disk, which is a main video signal composed of either a video signal obtained by converting a film material video into an electric signal or a video signal using a video signal as a material, and a video indicating whether the main video signal is a film material. A discrimination flag indicating whether or not the material is a material, and when the main video signal is a film material, when converting the main video signal into an interlaced scanning video signal, a field repeat signal indicating a timing of a field repeatedly output, It is encoded in a signal form suitable for recording in advance, modulated and recorded. Reference numeral 2 denotes a pickup, which converts a signal recorded on the disk 1 into an electric signal. Reference numeral 3 denotes a disk rotating device which rotates the disk 1 at a rotation speed suitable for reproduction. Reference numeral 30 denotes an interlaced scanning video signal reproducing circuit which demodulates and decodes the main video signal recorded on the disk 1 and outputs it as an interlaced scanning video signal. Reference numeral 5 denotes a first memory, which functions as a buffer memory when an interlaced video signal is reproduced. Reference numeral 6 denotes an NTSC encoder which converts an interlaced scanning video signal into an NTSC video format and outputs it. Reference numeral 7 denotes an interlaced scanning video output terminal from which an interlaced scanning video output reproduced from this terminal is output. A discrimination circuit 31 discriminates the type of the main video signal recorded on the disc 1 from the output of the pickup 2. Reference numeral 41 denotes a field repeat signal extraction circuit, which outputs a signal from the disc 1
Extract the field repeat signal recorded in. 33
Is a progressive scanning conversion circuit, which converts the output of the interlaced scanning video signal reproducing circuit 30 into a progressive scanning video signal and outputs it. 13
Is a third memory capable of storing video signals for one field, and is used for the operation of the progressive scan conversion circuit 33. Reference numeral 14 denotes a D / A converter, which converts the output of the sequential scan conversion circuit 33 into an analog value and outputs the analog value. Reference numeral 15 denotes a progressive scanning video output terminal from which a progressive scanning video signal is output to a video display device (not shown).

The operation of the video signal reproducing apparatus according to the fourth embodiment of the present invention configured as described above will be further described.

FIG. 14 is a schematic diagram showing the structure of a video signal recorded on the disk 1 according to the fourth embodiment of the present invention. As shown in FIG. 14, the video signal recorded on the disc 1 has two forms. That is, FIG. 14A shows a form of a film material. In this case, the base material is 24
This is a film image composed of a picture of a frame, and is compressed and recorded on the disk 1 together with a field repeat signal and a discrimination flag (= 1) as an image of 720 dots horizontally and 480 dots vertically for each frame. FIG. 14B shows the form of a video material image. In this case, the base material is an interlaced scan image of 30 frames / 60 fields per second. Each frame is an image of 720 horizontal dots and 480 vertical dots, but since it is interlaced, each field becomes an image of 720 horizontal dots and 240 vertical dots, and together with a field repeat signal (= 0) and a discrimination flag (= 0). ,
The data is compressed and recorded on the disk 1.

First, the case of reproducing a film material disc will be described with reference to the drawings. FIG. 15 is a schematic diagram showing a reproduction signal from a film material disk according to the fourth embodiment of the present invention.

When the material of the video signal recorded on the disc 1 is a film, as shown in FIG. 15, the image of 24 frames per second, 720 dots horizontally and 480 dots vertically, and the field repeat signal are discriminated as shown in FIG. (= 1). The field repeat signal extraction circuit 41 reads the field repeat signal recorded on the disc 1 from the signal input from the pickup 2 and outputs the signal to the interlaced scan video signal reproduction circuit 30. The discrimination circuit 31 reads the discrimination flag recorded on the disc 1 from the signal input from the pickup 2 and outputs it to the interlaced scanning video signal reproduction circuit 30. Discrimination circuit 3
By the output of 1, the interlaced scanning video signal reproducing circuit 30 recognizes that the main video signal recorded on the disc 1 is a film material. As shown in FIG. 15A, the disc 1 has film material images on the disc 1 with frame numbers.
are recorded in the order of n + 1, n + 2, n + 3,... The interlaced scanning video signal reproducing circuit 30 converts the film material signal recorded in this way into interlaced scanning video and outputs it. This is because a television monitor is generally most often used as an image display device for viewing at home, and its display format is interlaced scanning, and the television monitor has a frame rate of 30 frames per second.
Since it is designed to handle moving images of 60 fields, the interlaced scanning video signal reproducing circuit 30 simultaneously operates at a rate of 2 per second.
The video of four frames is converted into an interlaced scanning video of 30 frames / 60 fields per second and output. The interlaced scanning video signal reproducing circuit 30 converts each frame of the recording information into odd and even as shown in the interlaced scanning reproduced video signal in FIG.
n into two interlaced scan field images,
The first field is repeatedly displayed after the last field for each frame in accordance with the field repeat signal (FIG. 10C) repeated every five fields output from the field repeat signal extraction circuit 41, so that 24 frames per second is displayed. The frame film image is converted into an interlaced scan image of 30 frames / 60 fields per second and output. First
The memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 30 reproduces an image. The interlaced scanning video signal reproducing circuit 30 divides the frame of the interlaced scanning video signal generated in this manner into a frame as shown in FIG.
As shown in (1), a frame switching timing signal is output to the sequential scan conversion circuit 33.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this way into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the film material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 30
Inputs the interlaced video signal to the progressive scan conversion circuit 33. The progressive scan conversion circuit 33 recognizes from the output of the discrimination circuit 31 that the input digital video signal is a film material. That is, in the case of a film material, an image of 720 dots horizontally and 480 dots vertically is originally divided into two fields of 720 dots horizontally and 240 dots vertically for each frame of each material. .
The progressive scan conversion circuit 33 can detect the switching timing of the frame of the film signal used as the input digital video signal based on the frame switching timing signal shown in FIG. In accordance with the frame switching timing signal, the progressive scan conversion circuit 33
Stores the first field of the input of the progressive scan conversion circuit shown in FIG. 15 (e) in the third memory 13, stores the second field in the third memory 13, and stores both information in 1
By reading the data at the double speed for each line, the output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 14 and output from the progressive scanning video output terminal 15. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video output terminal 15 so that the user can watch the film material video returned to the progressive scan video.

Next, the case of reproducing a video material disc will be described with reference to the drawings. FIG. 16 is a schematic diagram showing a reproduced signal on a video material disc according to Embodiment 4 of the present invention.

If the material of the video signal recorded on the disk 1 is video, as shown in FIG. 16, the interlaced scanning image of 30 frames / 60 fields per second as recording information, each field is 720 dots horizontally and vertically An image of 240 dots and a field repeat signal (= 0) are recorded together with a discrimination flag (= 1). The discrimination circuit 31 reads the discrimination flag recorded on the disc 1 from the signal input from the pickup 2 and recognizes that the main video signal recorded on the disc 1 is a video material. Based on the output of the determination circuit 31, the interlaced scanning video signal reproduction circuit 30 recognizes that the main video signal recorded on the disk 1 is a video material. As shown in FIG. 16 (a), the disc 1 has video material images with frame numbers.
, M, m + 1, m + 2, m + 3, m + 4,... The interlaced scanning video signal reproducing circuit 30 outputs the video material signal recorded in this way as an interlaced scanning reproduced video signal shown in FIG. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 30 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this manner into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the video material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 30
Inputs the interlaced video signal to the progressive scan conversion circuit 33. The progressive scanning conversion circuit 33 recognizes that the main video signal recorded on the disk 1 is a video material from the output of the discrimination circuit 31, and performs the progressive scanning video conversion on the assumption that the main video is a video material. That is, in the case of a video material, the field video information and the field
A progressive scanning video signal is generated using the two pieces of field information. At this time, the progressive scan conversion circuit 33 vertically interpolates, using the data of the previous field, a pixel having a small movement between the previous field and the previous field shown in FIG. For a pixel having a large motion between and, the vertical interpolation data is generated from the upper and lower pixel data in the same field to obtain the output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 14 and output from the progressive scanning video output terminal 15. The progressive scan video output terminal 15 is connected to a progressive scan video signal television monitor (not shown) so that the user can watch the video material video returned to the progressive scan video.

In all of the above-described embodiments, the information recording / reproducing apparatus is described as an example in which the recording / reproducing apparatus is constituted by a recording / reproducing disk apparatus. However, other recording / reproducing apparatuses, such as a tape apparatus, can be similarly implemented.

Since the form of the material is determined from the video signal or the determination flag multiplexed with the video signal, a film material image and a video material image are mixed on a recording medium such as a disk or a tape. It is needless to say that, regardless of whether the material is reproduced or a material in which both material images are mixed in a satellite broadcast is received, sequential scanning reproduction can be performed without any problem, and interlaced scanning and progressive scanning video signals can be output.

[0085]

As described above, according to the present invention, it is possible to determine whether a material signal is a film or a video without using a signal which has been once converted into an interlaced image signal, thereby making it possible to perform two-field scanning. Therefore, a video signal reproducing apparatus that can perform inexpensive and high-stability sequential conversion processing without the need for memory and without deteriorating the stability of discriminating material signals due to noise mixing or the like can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a video signal reproducing device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing the structure of a video signal recorded on a disk 1 of the same.

FIG. 3 is a schematic diagram showing a reproduction signal on the film material disk.

FIG. 4 is a schematic diagram showing a reproduced signal on the video material disc.

FIG. 5 is a block diagram showing a configuration of a video signal reproducing device according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram showing a structure of a video signal recorded on the disc 1;

FIG. 7 is a schematic diagram showing a reproduction signal on the film material disk.

FIG. 8 is a schematic diagram showing a reproduced signal on the video material disc.

FIG. 9 is a block diagram showing a configuration of a video signal reproducing device according to a third embodiment of the present invention.

FIG. 10 is a schematic diagram showing a structure of a video signal recorded on the disc 1;

FIG. 11 is a schematic diagram showing a reproduction signal on the film material disk.

FIG. 12 is a schematic diagram showing a reproduced signal on the video material disc.

FIG. 13 is a block diagram illustrating a configuration of a video signal reproducing device according to a fourth embodiment of the present invention.

FIG. 14 is a schematic diagram showing a structure of a video signal recorded on the disk 1;

FIG. 15 is a schematic diagram showing a reproduction signal on the film material disk.

FIG. 16 is a schematic diagram showing a reproduced signal on the video material disc.

FIG. 17 is a block diagram showing a configuration of a conventional video signal reproducing device.

FIG. 18 is a schematic diagram showing an interlaced scanning video signal and a progressive scanning video signal.

FIG. 19 is a schematic diagram showing a structure of a video signal recorded on a disc 1 of a conventional video signal reproducing device.

FIG. 20 is a schematic diagram showing a reproduction signal on the film material disk.

FIG. 21 is a schematic diagram showing a reproduced signal on the video material disc.

[Explanation of symbols]

 Reference Signs List 1 disc 2 pickup 3 disc rotating device 4 interlaced scanning video signal reproducing circuit 5 first memory 6 NTSC encoder 7 interlaced scanning video output terminal 8 video input terminal 9 A / D converter 10 video type discriminating circuit 11 second memory 12 sequentially Scanning conversion circuit 13 third memory 14 D / A converter 15 progressive scanning video output terminal 20 interlaced scanning video signal reproducing circuit 21 discriminating circuit 22 field repeat signal generating circuit 23 progressive scanning converting circuit 30 interlaced scanning video signal reproducing circuit 31 discriminating circuit 33 progressive scan conversion circuit 41 field repeat signal extraction circuit 42 discrimination circuit

Claims (16)

[Claims] 1. Transfer information for transferring a main video signal composed of either a first type of video signal obtained by converting a film material video into an electrical signal or a second type of video signal using a video signal as a material. A video signal playback device that plays back the main video signal from a video signal playback device, wherein the determination circuit determines whether the main video signal is the first type video signal or the second type video signal; A timing signal generation circuit that outputs a timing signal indicating a field to be repeatedly output when the main video signal is determined to be the first type video signal; and the determination circuit determines that the main video signal is the first type video signal. When the main video signal is determined to be a video signal of 60 fields, the main video signal is converted into an interlaced scanning video signal of 60 fields per second in accordance with the output of the timing signal generation circuit, and the converted signal is output. An interlaced scanning video signal reproducing circuit that outputs the main video signal as it is when the main video signal is determined to be the second type of video signal, and the main video signal is the first type of video signal or A video signal reproducing device comprising: a progressive scan conversion circuit that changes a method of generating an insertion scanning signal according to a second type of video signal. 2. The video signal reproducing apparatus according to claim 1, wherein the progressive scan conversion circuit changes a method of generating an insertion scan signal according to an output of the discrimination circuit. 3. The video signal reproducing apparatus according to claim 1, wherein the progressive scan conversion circuit changes a method of generating an insertion scan signal according to the presence or absence of a timing signal. 4. A main video signal comprising a first type of video signal obtained by converting a film material video into an electrical signal or a second type of video signal using a video signal as a material, and the main video signal A video signal reproducing apparatus for reproducing the main video signal from transfer information in which a determination flag indicating whether the video signal is the first video signal or the second type of video signal is multiplexed and transferred, A discrimination flag extraction circuit for extracting the discrimination flag from the transfer information; and a field to be repeatedly output when the discrimination flag indicates that the main video signal is the first type of video signal. The timing signal generating circuit for outputting a timing signal; and the timing signal when the determination flag indicates that the main video signal is the first type of video signal. The main video signal is converted into an interlaced scanning video signal of 60 fields per second according to the output of the signal generation circuit and output, and the discrimination flag indicates that the main video signal is the second type of video signal. In this case, an interlaced scanning video signal reproducing circuit that outputs the main video signal as it is, and generation of an insertion scanning signal according to whether the main video signal is the first type video signal or the second type video signal. And a progressive scan conversion circuit for changing the method. 5. The video signal reproducing apparatus according to claim 4, wherein the progressive scan conversion circuit changes a method of generating an insertion scan signal in accordance with an output of the determination flag extraction circuit. 6. The video signal reproducing apparatus according to claim 4, wherein the progressive scan conversion circuit changes a method of generating an insertion scan signal according to the presence or absence of a timing signal. 7. A main video signal comprising a first type of video signal obtained by converting a film material video into an electrical signal or a second type of video signal using a video signal as a material, and the main video signal Is a video signal of the first type, a timing signal indicating a field repeatedly output when the main video signal is converted into an interlaced scanning video signal of 60 fields per second is multiplexed and transmitted. A video signal reproducing apparatus for reproducing the main video signal from information, a timing signal extracting circuit for extracting the timing signal from the transfer information, and wherein the main video signal is a video signal of the first type or the second video signal. A discriminating circuit for discriminating whether the main video signal is the first type of video signal; and a discriminating circuit for discriminating whether the main video signal is the first type of video signal. 60 per second according to the timing signal
Converting and outputting a field interlaced scanning video signal, and an interlacing scanning video signal reproducing circuit that outputs the main video signal as it is when the discriminating circuit discriminates the main video signal as the second type of video signal; A progressive scan conversion circuit for changing a method of generating an insertion scan signal according to whether the main video signal is the first type of video signal or the second type of video signal. Playback device. 8. The video signal reproducing apparatus according to claim 7, wherein the progressive scan conversion circuit changes a method of generating an insertion scan signal according to an output of the discriminating circuit. 9. The video signal reproducing apparatus according to claim 7, wherein the progressive scan conversion circuit changes a method of generating an insertion scan signal according to the presence or absence of a timing signal. 10. A main video signal comprising either a first type of video signal obtained by converting a film material video into an electrical signal or a second type of video signal using a video signal as a material, and said main video signal Is a determination flag indicating whether the signal is the first video signal or the second type of video signal,
When the main video signal is the first type of video signal, a timing signal indicating a field which is repeatedly output when the main video signal is converted into an interlaced scanning video signal of 60 fields per second is multiplexed. What is claimed is: 1. A video signal reproducing apparatus for reproducing said main video signal from transfer information to be transferred, comprising: a determination flag extraction circuit for extracting said determination flag from said transfer information; and a timing signal extraction circuit for extracting said timing signal from said transfer information. Circuit, and if the determination flag indicates that the main video signal is the first type of video signal, the main video signal is converted into a 60-field interlaced scanning video signal in accordance with the timing signal. If the discrimination flag indicates that the main video signal is the video signal of the second type, An interlaced scanning video signal reproducing circuit that outputs the main video signal as it is, and a method of generating an insertion scanning signal according to whether the main video signal is the first type video signal or the second type video signal. A video signal reproducing device comprising a progressive scan conversion circuit. 11. The video signal reproducing apparatus according to claim 10, wherein the progressive scan conversion circuit changes a method of generating an insertion scan signal in accordance with an output of the determination flag extraction circuit. 12. The video signal reproducing apparatus according to claim 10, wherein said progressive scan conversion circuit changes a method of generating an insertion scan signal according to the presence or absence of a timing signal. 13. The progressive scan conversion circuit detects a break of a frame of an original film material of a main video signal based on a timing signal when the main video signal is a first type of video signal, and performs an input jump for each frame. 13. The video signal reproducing apparatus according to claim 1, wherein a field signal of the scanned video signal is combined into two fields and sequentially converted into a scanning signal. 14. The progressive scan conversion circuit, when the main video signal is a video signal of the second type, the horizontal scan signal information before or after the field signal of the input interlaced scan video signal or the horizontal scan signal information of the previous or next field. 13. A video signal reproducing apparatus according to claim 1, wherein a scanning signal is generated based on the image signal, and is sequentially converted into a scanning signal by interpolating between scanning lines of an original field signal. . 15. The video signal reproducing apparatus according to claim 1, wherein the transfer information is information pre-recorded on an information recording medium. 16. The transfer information according to claim 1, wherein the transfer information is information transferred by a wireless or wired line.
The video signal reproducing device according to any one of the above.