JP2004007199A - Video signal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it is necessary to transmit different moving videos for each of all pictures at the time of displaying moving images at a moving image window 1015 across a plurality of still pictures, and it is necessary to perform re-coding processing for each picture as a result. <P>SOLUTION: This video signal display device is provided with a picture data generating means (13) for generating N pieces of divided picture data corresponding to N pieces of display devices by dividing the still picture data of one frame and a signal synthesizing means (16) for superimposing moving image data coded by a moving image coding means (12) on M(1 ≤ M ≤ N) pieces of the divided picture data. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal display device that divides a video signal into a plurality of signals, transmits the divided signals, and displays the signals on a plurality of screens.
[0002]
[Prior art]
FIG. 14 is a block diagram of a conventional video signal display device disclosed in, for example, JP-A-2001-264313.
The purpose of this example is to make it possible to display an image related to an image signal transmitted by a different method (for example, a moving image and a still image) with a small circuit scale, and to add a moving image to a part of the still image displayed on the entire screen. When a part of the transmitted screen data (for example, a still image) is rewritten to, for example, a moving image, as in the case of displaying the overlapping image, the still image and moving image data for one screen are newly added. Is transmitted, but only the image data of the rewritten portion is transmitted.
[0003]
The operation will be described below.
First, a PC (personal computer) 1001 issues a screen rewriting command, and the image data receiving unit 1002 receives the rewriting information.
Next, the format detection circuit 1003 detects the format (moving image or still image) of the rewriting information, and the control circuit 1004 notifies the image data generating unit 1005 of the detection result.
If it is a still image, the image data generation unit 1005 transmits only the change location in the screen to the output processing circuit 1006. If it is a moving image, the whole moving image is transmitted to the output processing circuit 1006.
The display unit 1007 displays an image by rewriting the image of the portion that needs to be rewritten.
Here, the moving image data is encoded by the PC 1001 and is decoded by the image data generation unit 1005 before being sent to the output processing circuit 1006.
[0004]
[Problems to be solved by the invention]
In the above configuration, the moving image signal and the still image signal are separated and decoded on the side. In this configuration, to display a moving image in the moving image window 1015 over a plurality of still screens as shown in FIG. It is necessary to transmit a separate moving image for each of the screens (screen (1) 1011 to screen (4) 1014), and thus there is a problem that a re-encoding process is required for each screen.
[0005]
The present invention has been made in order to solve the above-described problems, and in a video signal display device that displays a moving image that spans a plurality of screens, a video signal is transmitted by being superimposed on a part of a still screen. Accordingly, an object of the present invention is to enable a moving image to be displayed on a plurality of screens.
[0006]
[Means for Solving the Problems]
A video signal display device according to the present invention divides and displays an original image in which a still image and a moving image are combined into N (N is a natural number) display devices, and displays the original image by a set of the N display devices. A video signal display device for displaying the same image as the video signal, including a screen data generating unit, a moving image generating unit, a moving image encoding unit, a signal combining unit, a signal separating unit, a moving image decoding unit, A display image synthesizing unit; and N display devices, wherein the screen data generating unit divides one frame of still image data to generate N divided screen data corresponding to the N display devices. The moving image generating unit generates moving image data from moving image information, the moving image encoding unit encodes the moving image data generated by the moving image generating unit to generate encoded moving image data, and the signal synthesizing unit includes: Generated by the screen data generator The encoded moving image data is superimposed on M (1 ≦ M ≦ N) of the N divided screen data to generate M moving image superimposed divided screen data, and the signal separating unit includes: Separating the M pieces of divided screen data and the encoded moving image data from each of the moving image superimposed divided screen data, and decoding and decoding the encoded moving image data separated by the signal separating means. The moving image data is generated, and the N display video synthesizing units are configured such that M of the display video synthesizing units are M divided screen data separated by the signal separating unit and decoding performed by the moving image decoding unit. The video data is synthesized to generate synthesized video data, and NM of the display video synthesizing means are used by the signal synthesizing means of the N divided screen data generated by the screen data generating means. Video Day Are combined with the decoded video data generated by the video decoding means to generate synthesized video data, and the N display devices generate the synthesized video data. The composite video data is received from the corresponding display video compositing means of the compositing means and displayed.
[0007]
Also, in the video signal display device according to the present invention, the coded moving image data to be superimposed on the divided screen data in the signal synthesizing means is superimposed on a portion of the divided screen data not displayed on the display device. It is.
[0008]
Further, in the video signal display device according to the present invention, a portion of the divided screen data which is not displayed on the display device is data corresponding to a vertical blanking period in the display device.
[0009]
In the video signal display device according to the present invention, a portion of the divided screen data which is not displayed on the display device is data corresponding to a horizontal retrace period in the display device.
[0010]
Further, the video signal display device according to the present invention further comprises a moving image storage means and a read instruction means, wherein the moving image storage means stores the encoded moving image data generated by the moving image encoding means, and The encoded moving image data is transmitted to the signal synthesizing means in accordance with the instruction.
[0011]
Further, the video signal display device according to the present invention extracts time information from the decoded moving image data decoded by the moving image decoding means and transmits the extracted time information to the N display devices as a mutual synchronization signal between the N display devices. The apparatus further includes a multiple screen synchronization unit.
[0012]
Further, the video signal display device according to the present invention further comprises moving image position information input means for designating at least one of a position and a size of the moving image in the original image as moving image position information, and the signal synthesizing means includes the encoded moving image data. The moving image position information is superimposed on the divided screen data to generate moving image position information superimposed divided screen data, and the signal separating unit separates the moving image position information from the moving image position information superimposed divided screen data, The decoding means transmits the decoded moving picture data to each display video synthesizing means based on the moving picture position information separated by the signal separating means.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is an example of a schematic configuration diagram of a system using the video signal display device of the present invention. Reference numeral 1 denotes a personal computer (PC) provided with a camera and a mouse (not shown) for capturing moving images. A moving image window 3 for displaying a moving image captured by a camera together with a still image is opened on the monitor 2, and the position and size of the moving image window 3 can be changed by a mouse.
Reference numeral 4 denotes a large-screen device including four display devices A5A to D5D. The large-screen device includes the still image and the moving image window 6 displayed on the four display devices, and the same display as that on the monitor 2 of the personal computer 1. Displays still images and moving images.
The display devices A5A to D5D are, for example, display devices each having a size of 50 inches, and four of them form a large screen device having a size of 100 inches.
The image in which the still image and the moving image displayed on the monitor 2 are combined is the original image in the present invention.
[0014]
FIG. 2 is a block diagram showing the internal configuration of the configuration shown in FIG.
In FIG. 2, reference numeral 7 denotes a transmitting device that generates moving image data and still image data, performs predetermined processing, and then transmits the generated data, and 8 performs predetermined processing on the moving image data and still image data transmitted from the transmitting device. 1. The transmitting device 7 corresponds to the PC in FIG. 1, and the receiving device 8 corresponds to the large screen device.
[0015]
In FIG. 2, reference numeral 11 denotes a moving image generating unit that generates moving image data from a moving image captured from an image input device such as a camera, and 12 denotes a moving image data generated by the moving image generating unit, which is encoded by an encoding method such as MPEG. A moving image encoding means 13 for generating encoded moving image data by encoding and compressing, generating screen image data (screen data) such as a WINDOW system, dividing the image data into a plurality of pieces, and generating a plurality of divided screen data In this example, the image data is divided into four screen data so that the still image data is displayed on the large screen device in FIG.
Reference numeral 14 denotes a mouse or the like, and moving image position information input means for changing the position and size of the moving image window on the display screen, and 15A, 15B, 15C, and 15D each transmit the divided screen data generated by the screen data generating means 13. The transmission path A15A and the transmission path B15B are input to a signal separating unit 21 described later, and the transmission path C15C and the transmission path D15D are input to the signal combining unit 16.
[0016]
The signal synthesizing unit 16 receives the encoded moving image data generated by the moving image encoding unit 12 and the moving image position information input from the moving image position information input unit 14 from the transmission path C15C and the transmission path D15D. A composite signal (moving image superimposed divided screen data, moving image position information superimposed divided screen data) is generated by superimposing on the divided screen data, and transmitted to the signal separating unit 21 via the transmission path E17E and the transmission path F17F.
[0017]
The signal separating unit 21 extracts encoded moving image data and moving image position information from the synthesized signal transmitted from the signal synthesizing unit, and decodes the encoded moving image data to the moving image decoding unit 22 that generates decoded moving image data. Transmit. Still image data included in the synthesized signal is transmitted to the display image synthesizing unit C23C and the display image synthesizing unit D23D.
23A, 23B, 23C and 23D are a display image synthesizing unit A, a display image synthesizing unit B, a display image synthesizing unit C and a display image synthesizing unit D, respectively, which are transmitted from the screen data generating unit 13 or the signal separating unit 21. The still image data and the moving image data transmitted from the moving image decoding means 22 are combined to generate composite image data, and the combined image data is transmitted to the display devices A5A, B5B, C5C, and D5D, respectively. Each display device displays an image.
The display devices A5A to D5D in FIG. 2 correspond to the display devices denoted by the same reference numerals in FIG.
[0018]
Next, the operation will be described.
First, the moving image generation unit 11 generates moving image data from a moving image captured from an image input device such as a camera, and converts the moving image data into a digital or analog signal of, for example, a luminance or color difference format.
This moving image data is encoded by the moving image encoding unit 12 at, for example, an MPEG format at a transmission rate corresponding to the resolution, and transmitted to the signal combining unit 16 as encoded moving image data (MPEG stream). The details of the transmission rate will be described later. For example, the transmission rate is 20 Mbps for VGA and 60 Mbps for UXGA.
[0019]
The screen data generating means 13 is such that the processor generates screen data as still image data based on a GUI such as a WINDOW system, and divides the screen data into four display devices A5A to D5D corresponding to four display devices. Then, for example, four divided screen data which are RGB format digital signals are generated.
Among them, the divided screen data A and the divided screen data B (not shown) corresponding to the display device A5A and the display device B5B are transmitted to the display video combining means A23A and the display video combining means B23B by the transmission paths A15A and B15B, respectively. The transmitted divided screen data C and divided screen data D (not shown) corresponding to the display device C5C and the display device D5D are transmitted to the signal synthesizing unit 16 via the transmission paths C15C and D15D, respectively.
[0020]
The operator operates the moving image position information input means 14 such as a mouse while looking at the monitor 2 or the large screen device 4 of the personal computer 1 shown in FIG. 1 to change the position and size of the moving image window 3 or the moving image window 6 on the screen. To change.
The moving picture position information input means 14 transmits the position and size of the moving picture window on the screen to the signal synthesizing means 16 as moving picture position information as digital information.
[0021]
The signal synthesizing unit 16 converts the divided screen data C and the divided screen data D transmitted from the transmission path C15C and the transmission path D15D into the encoded moving image data transmitted from the moving image encoding unit 12 and the moving image position information input unit 14. The transmitted moving image position information is superimposed.
The encoded moving image data is, for example, an MPEG stream, and the recording method is an MPEG TS or PS.
There is no particular limitation on how to distribute and superimpose the encoded moving image data and moving image position information on the two divided screen data, but the data amount of the encoded moving image data is overwhelming with respect to the moving image position information. Therefore, the encoded moving image data may be evenly distributed to the two divided screen data, and the moving image position information may be superimposed on only one of the divided screen data.
The signal synthesizing unit 16 transmits the divided screen data C and the divided screen data D obtained by superimposing the encoded moving image data and the moving image position information to the signal separating unit 21.
[0022]
The signal separating unit 21 separates the encoded moving image data and the moving image position information from the received two divided screen data, combines the two encoded moving image data, and transmits as one encoded moving image data to the moving image decoding unit 22. I do. At the same time, the moving picture position information is also transmitted to the moving picture decoding means.
Further, the signal separating unit 21 transmits the divided screen data included in the received two divided screen data to the corresponding display video combining units C23C and D23D.
[0023]
The moving image decoding unit 22 decodes the received encoded moving image data to generate moving image data. Further, based on the received moving image position information, it is determined which part of the moving image is to be displayed on each of the display devices (display devices A5A to D5D), and the display video synthesizing means A23A to A23A to display device corresponding to each display device are determined. The divided video data is transmitted to the display video synthesizing unit D23D as digital signals in, for example, RGB format.
[0024]
The display image synthesizing means A23A to display image synthesizing means D23D synthesize and display the divided screen data received from the screen data generating means 13 or the signal separating means 21 and the divided moving image data received from the moving image decoding means 22, respectively. The data is transmitted to each display device as composite video data in a format to be displayed on the devices A5A to D5D.
[0025]
Here, a method of superimposing encoded moving image data (generated by the moving image encoding unit 12) and divided screen data (generated by the screen data generating unit 13) in the signal combining unit 16 will be described.
For example, when the moving image has a VGA size, the general SDTV coding rate is 10 to 20 Mbps, and when the moving image is a UXGA size, the general HDTV coding rate is 20 Mbps. It is necessary to encode by up to, for example.
For still images, the transmission rate in the case of VGA is 640 pixels × 480 lines × 60 frames per second × 24 bits × 1.05 (5% is allocated to blanking and control) = 442.9 Mbps.
[0026]
Assuming that the maximum of the SDTV stream data of MPEG is 20 Mbps from the above, the total transmission rate from the transmitting device 7 to the receiving device 8 when the VGA (still image) and the MPEG stream (moving image) are superimposed is:
442.9 Mbps + 20 Mbps = 462.9 Mbps
It becomes.
In order to maintain the required VGA resolution and secure this transmission rate, the VGA is 442.9 Mbps with 480 lines.
480 × 462.9 / 442.9 = 501.7
Therefore, the transmission rate of the transmission data is equivalent to transmitting 502 lines per frame.
Therefore, by setting a transmission rate corresponding to an increase of 502-480 = 22 lines per frame, the VGA image and the SDTV moving image can be superimposed and sent from the transmitting device 7 to the receiving device 8. Become.
Since the moving image position information has a small data amount of about several bytes, it is excluded from the calculation.
[0027]
The data corresponding to the 22 lines is converted into the divided screen data C and the divided screen data D transmitted from the transmission path C15C and the transmission path D15D by the signal combining unit 16 in FIG. Superimposed as part D. The superimposed position is the vertical blanking period of the display device C5C and the display device D5D.
[0028]
For example, to display HDTV (60 Mbps) with UXGA (2768.6 Mbps), 1227 lines are required by performing the same calculation. Therefore, by increasing 1227-1200 = 27 lines, UXGA video and HDTV moving image can be transmitted in a superimposed manner.
[0029]
In the above description, an example has been described in which stream data is superimposed by increasing the number of lines in a pseudo manner. However, the number of pixels in the horizontal direction of the screen is not limited to the number of lines, and may be pseudo-increased.
In the case of VGA, the number of pixels to be artificially increased is
640 * 462.9 / 442.9-640 = 28.9
29 pixels.
When the stream data B and D are superimposed on the divided screen data B and the divided screen data D, respectively, as shown in FIG. 4, the transmission path B15B is displayed via the signal combining means 16 and the signal separating means 21 in the configuration of FIG. The transmission path C15C is connected to the image combining means B23B, and is directly connected to the display image combining means C23C.
[0030]
The number of lines or the number of pixels may be increased in a pseudo manner other than those shown in FIGS. 3 and 4, and the stream data is concentrated on one divided screen data as shown in FIGS. Alternatively, as shown in FIG. 7, the stream portion may be uniformly superimposed in the vertical blanking period of the four divided screen data. 5 to 7 show examples of the VGA. In the case of FIGS. 5 and 6, only the transmission path through which the divided screen data on which the stream data is superimposed is transmitted is connected to the signal separation means 21 via the signal synthesis means 16, and the other transmission paths are connected to the display image synthesis means. It is directly connected. In the case of FIG. 7, all transmission paths are connected to the signal separation unit 21 via the signal synthesis unit 16.
[0031]
In each of FIGS. 3 to 7 described above, the stream portion is superimposed on an area that is not displayed on each of the display devices 5A to 5D.
[0032]
Further, a frame including only the data of the stream section may be inserted.
In this case, if it is a VGA, it is usually 60 frames per second.
60 × 462.9 / 442.9 = 62.7
Therefore, the transmission rate of the transmission data is equivalent to transmitting 63 frames per second.
Accordingly, since the transmission rate is equivalent to increasing the number of frames by 60 frames per second by three frames, for example, as shown in FIG. 8, it is sufficient to insert a stream-corresponding pseudo frame of only one stream data every 20 frames.
In this case, as shown in FIG. 9, four divided screen data corresponding to the same frame generated by the screen data generating means 13 are transmitted as one frame signal to the signal synthesizing means 16 through the transmission path G15G for 20 frames. The encoded image data generated by the moving image encoding unit 12 and the moving image position information input from the moving image position information input unit 14 are transmitted as the next frame from the transmission line H17H.
The signal separating unit 21 divides the frame signal of each frame into four divided screen data and transmits the divided frame data to the display video combining unit A23A to the display video combining unit D24D, and transmits the stream-corresponding pseudo frame to the moving image decoding unit 22. .
The display image combining means A23A to display image combining means D23D combine the received divided screen data and the divided moving image data received from the moving image decoding means 22 into a format for display on the display devices A5A to D5D, respectively. , 60 frames per second to each transmission device.
[0033]
Further, three stream-corresponding pseudo frames may be added to the end of the display data for 60 frames.
[0034]
Also, a so-called “superimpose” that estimates position information of a moving image from a special color or a rectangular shape of a moving image area of a video signal may be used. Also, the number of moving images is not limited to one.
[0035]
As described above, since the encoded moving image data (stream data) is superimposed only on the specific screen data, the re-encoding process can be reduced.
Further, even in a conventional display device that cannot perform decoding processing of encoded moving image data, the superimposed stream portion is superimposed on a portion invisible on a CRT or LCD (horizontal retrace period or vertical retrace period). It can be displayed.
In the above example, an analog signal may be partially used. When an analog is used, DA conversion and AD conversion are interposed as necessary. Also, optical communication may be used.
[0036]
In the above description, the moving picture coding means 12 may transmit the coding parameters to the signal combining means 16 simultaneously with the coded moving picture signal in consideration of the deterioration at the time of re-coding.
[0037]
In the above description, an example in which the number of display devices is four (display device A5A to display device D5D) is described. However, the number of display devices is not limited thereto, and may be more or less than four. In this case, the screen data generating means 13 may generate divided screen data according to the number of display devices, and the moving picture coding means 12 may superimpose the coded moving picture data on a predetermined number of divided screen data.
[0038]
If the position and size of the moving image window are fixed, the moving image position information input means may not be provided.
[0039]
Embodiment 2 FIG.
In the first embodiment, an example has been described in which the encoded moving image data generated by the moving image encoding unit 12 is superimposed on the divided screen data generated by the screen data generating unit 13 in real time. An example in which is stored temporarily will be described.
[0040]
In FIG. 10, reference numeral 31 denotes a moving image storage unit that stores the encoded moving image data generated by the moving image encoding unit 12, and includes a storage unit such as a hard disk device. Reference numeral 32 denotes a reading instruction unit for instructing reading of the encoded moving image data stored in the moving image storage unit 31. The other parts are the same as those in the configuration of the first embodiment shown in FIG.
[0041]
As in the first embodiment, the moving image encoding unit 12 generates encoded moving image data, and the moving image storage unit 31 accumulates the encoded moving image data.
The read instruction means 32 issues a read instruction to the moving image storage means 31 by an operation of the operator. Upon receiving the read instruction, the moving image storage unit 31 transmits the encoded moving image data specified by the moving image specifying information included in the read instruction to the signal combining unit 16.
[0042]
Thereafter, it is the same as in the first embodiment, and superimposes the encoded moving image data and the moving image position information input from the moving image position information input unit 14 on the divided screen data transmitted from the transmission paths C15C and D15D. Then, a combined signal is generated and transmitted to the signal separating unit 21 via the transmission path E17E and the transmission path F17F.
[0043]
The signal separating unit 21 extracts encoded moving image data and moving image position information from the combined signal transmitted from the signal combining unit, decodes the encoded moving image data, and transmits the decoded moving image data to the moving image decoding unit 22 that generates moving image data. I do. Still image data included in the synthesized signal is transmitted to the display image synthesizing unit C23C and the display image synthesizing unit D23D.
The display image synthesizing means A23A, the display image synthesizing means B23B, the display image synthesizing means C23C, and the display image synthesizing means D23D are composed of the still image data transmitted from the screen data generating means 13 or the signal separating means 21 and the moving image decoding means. The moving image data transmitted from 22 is synthesized and transmitted to the display devices A5A, B5B, C5C, and D5D, respectively, and each display device displays an image.
[0044]
As described above, the provision of the moving image storage means makes it possible to display moving image information accumulated in the past on the screen data.
Also, by changing the moving image specifying information included in the reading instruction issued by the reading means 32, the moving image information can be changed.
[0045]
Also in this embodiment, the various formats described in the first embodiment can be adopted as a method of superimposing the divided screen data and the encoded moving image data.
[0046]
Embodiment 3 FIG.
In the first embodiment, the moving picture coding unit 12 generates the coded moving picture data and divides the coded moving picture data into two divided screen data and superimposes the coded moving picture data. An encoded signal dividing unit 41 for dividing the encoded moving image data generated by the unit 12 may be provided.
FIG. 11 is the same as the example of the first embodiment shown in FIG. 2 except for the coded signal dividing means 41 and the coded signal synthesizing means 42 which will be described next. Omitted.
[0047]
In FIG. 11, an encoded signal dividing unit 41 divides the encoded moving image data generated by the moving image encoding unit 12 into four and transmits the divided divided moving image data to the signal combining unit 16. When the encoded moving image data is divided into four parts, the moving image position information input from the moving image position information input means 14 determines which position of each display device A5A to display device D5D should display a moving image of which size. Judge and divide.
The signal synthesizing unit 16 superimposes the corresponding divided coded moving image data on the four divided screen data generated by the screen data generating unit 13, and transmits the resultant to the signal separating unit 21.
The signal separating unit 21 separates the encoded moving image data and the moving image position information from the received four divided screen data, and transmits them to the encoded signal combining unit 42.
The signal separating unit 21 transmits the divided screen data included in the received four divided screen data to the corresponding display video combining units A23A to D32D.
[0048]
The coded signal combining means 42 combines the four coded data transmitted from the signal separating means 21 to generate one combined coded data, and the moving picture decoding means 22 decodes the combined coded data to produce a moving picture. Generate data.
The moving image decoding unit 22 further determines which part of the moving image is to be displayed on each of the display devices (display devices A5A to D5D) based on the received moving image position information, and displays a video image corresponding to each display device. The moving image data is transmitted to the means A23A to the display image synthesizing means D23D as divided moving image data, for example, as digital signals in RGB format.
[0049]
As described above, there is an effect that the load on the moving picture coding means for dividing the moving picture data by reducing the load of the moving picture coding means by providing the coded signal dividing means 41 is increased.
Further, since the encoded signal synthesizing unit 42 is provided and the moving image data separated by the signal separating unit 21 is synthesized, the load on the moving image decoding unit 22 is reduced, and the processing speed is increased.
[0050]
Further, as described with reference to FIG. 10 in the second embodiment, the moving image storage unit 31 and the read instruction unit 32 may be added to the configuration of FIG.
[0051]
In the above example, a multiple screen synchronizing unit 51 may be provided as shown in FIG. 13 in order to more accurately synchronize the multiple screens.
The multiple-screen synchronization unit 51 extracts time information from the moving image information decoded by the moving image decoding unit 22, and transmits the time information from each display device A5A to the display device D5D, thereby displaying the time information on each display device. It has a function to synchronize videos.
[0052]
【The invention's effect】
As described above, according to the present invention, the encoded moving image data is superimposed on the divided still image data, so that the transmission rate can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a system using a video signal display device according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of the first embodiment of the present invention.
FIG. 3 is a diagram showing an example of divided screen data and a stream unit according to the first embodiment of the present invention.
FIG. 4 is a diagram showing another example of divided screen data and a stream unit according to the first embodiment of the present invention.
FIG. 5 is a diagram showing another example of divided screen data and a stream unit according to the first embodiment of the present invention.
FIG. 6 is a diagram showing another example of divided screen data and a stream unit according to the first embodiment of the present invention.
FIG. 7 is a diagram showing another example of divided screen data and a stream unit according to the first embodiment of the present invention.
FIG. 8 is a diagram showing an example of frame data and a stream unit according to the first embodiment of the present invention.
FIG. 9 is a block diagram showing another configuration of the first embodiment of the present invention.
FIG. 10 is a block diagram showing a configuration of a second embodiment of the present invention.
FIG. 11 is a block diagram showing a configuration of a third embodiment of the present invention.
FIG. 12 is a block diagram showing another configuration of the third embodiment of the present invention.
FIG. 13 is a block diagram showing another configuration of the third embodiment of the present invention.
FIG. 14 is a block diagram showing a configuration of a conventional video signal display device.
FIG. 15 is a diagram showing a state in which a still image and a moving image are displayed in a superimposed manner.
[Explanation of symbols]
1 PC, 2 monitors, 3 video window, 4 large screen device, 5A display device A, 5B display device B, 5C display device C, 5D display device D, 6 video window, 7 transmitting device, 8 receiving device, 11 Moving image generating means, 12 moving image encoding means, 13 screen data generating means, 14 moving image position information input means, 15A transmission path A, 15B transmission path B, 15C transmission path C, 15D transmission path D, 15G transmission path G, 16 signals Combining means, 17E transmission path E, 17F transmission path F, 17H transmission path H, 21 signal separation means, 22 video decoding means, 23A display video synthesis means A, 23B display video synthesis means B, 23C display video synthesis means C, 23D display video synthesizing means D, 31 moving picture accumulating means, 32 reading instruction means, 41 coded signal dividing means, 42 coded signal synthesizing means, 100 PC (personal computer), 1002 image data receiving unit, 1003 format detecting circuit, 1004 control circuit, 1005 image data generating unit, 1006 output processing circuit, 1007 display unit, 1010 display, 1011 screen (1), 1012 screen (2) , 1013 screen (3), 1014 screen (4).

Claims (7)

A video signal display in which an original image in which a still image and a moving image are synthesized is divided into N (N is a natural number) display devices, and the same image as the original image is displayed by a set of the N display devices. Device
It comprises a screen data generating means, a moving image generating means, a moving image encoding means, a signal synthesizing means, a signal separating means, a moving image decoding means, N display video synthesizing means, and N display devices. ,
The screen data generating means includes:
One frame of still image data is divided to generate N divided screen data corresponding to the N display devices,
The moving image generating means includes:
Generate video data from video information,
The video encoding means includes:
Encoding the moving image data generated by the moving image generating unit to generate encoded moving image data,
Superimposing the encoded moving image data on M (1 ≦ M ≦ N) of the N divided screen data generated by the screen data generating means to generate M moving image superimposed divided screen data;
The signal separating means includes:
Separating the M pieces of the divided screen data and the encoded moving image data from each of the M pieces of the moving image superimposed divided screen data,
The video decoding means,
Decoding the encoded moving image data separated by the signal separating means to generate decoded moving image data,
The N display video synthesizing means includes:
M of the display video synthesizing means generate synthesized video data by synthesizing the M divided screen data separated by the signal separating means and the decoded video data generated by the video decoding means,
NM of the display video synthesizing means are NM of the N divided screen data generated by the screen data generating means, the NM of which the coded moving image data is not superimposed by the signal synthesizing means. Generating the combined video data by combining the divided screen data and the decoded video data generated by the video decoding means,
Video signal display means, wherein the N display devices receive and display the composite video data from a corresponding one of the N display video synthesis means. 2. The video signal display device according to claim 1, wherein the encoded moving image data superimposed on the divided screen data in the signal synthesizing unit is superimposed on a portion of the divided screen data not displayed on the display device. . The video signal display device according to claim 2, wherein a portion of the divided screen data not displayed on the display device is data corresponding to a vertical blanking period on the display device. The video signal display device according to claim 2, wherein a portion of the divided screen data not displayed on the display device is data corresponding to a horizontal retrace period in the display device. Further comprising moving image storage means and read instruction means,
The moving image storage means,
2. The video signal display according to claim 1, wherein the encoded moving image data generated by the moving image encoding unit is stored, and the encoded moving image data is transmitted to the signal synthesizing unit according to an instruction from the read instruction unit. apparatus. A plurality of screen synchronizing means for extracting time information from the decoded moving image data decoded by the moving image decoding means and transmitting the extracted time information to the N display devices as a mutual synchronization signal between the N display devices. The video signal display device according to claim 1. A moving image position information input unit that specifies at least one of a position and a size of the moving image in the original image as moving image position information,
The signal combining means generates moving image position information superimposed divided screen data by superimposing the moving image position information on the divided screen data together with the encoded moving image data,
The signal separating means separates the moving image position information from the moving image position information superimposed divided screen data,
7. The moving image decoding unit according to claim 1, wherein the moving image decoding unit transmits the decoded moving image data to each display image synthesizing unit based on the moving image position information separated by the signal separating unit. 8. The video signal display device according to the above.

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