JPH0537896A - Recorder - Google Patents

Abstract

PURPOSE:To eliminate a frame lighted by a strobo from a moving picture going to be recorded. CONSTITUTION:A video signal outputted from a camera signal processing circuit 22 is fed to a recording processing circuit 34 via a switch 32 and recorded on a magnetic tape 38 by a magnetic head 36. A picture memory 26 stores one frame of an output of the camera signal processing circuit 22. A system control circuit 54 throws a switch 32 to the position of (b) synchronously with strobo flash when a strobo is used, after the end of strobo flash, the switch 32 is thrown to the position of contact (a). While the switch 32 is thrown to the position (b), a frame not giving effect onto the strobo is read from the picture memory 26 by a timing generating circuit 30 and fed to a recording circuit 34 via the switch 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device capable of recording moving images and still images on a recording medium.

[0002]

2. Description of the Related Art In video tape recorders (VTRs), there is an increasing demand for high density recording. When the tape running speed is slowed down for high-density recording, the relative speed between the fixed head for audio recording and the magnetic tape becomes small, which causes a problem that reproduction sound quality deteriorates.

To address this problem, a method has been proposed in which a track formed by a rotary head is lengthened and a time-axis-compressed audio signal is recorded in the extended portion. For example, in a rotary 2 head helical scan type VTR, a magnetic tape was wound around a rotating cylinder in the past about 180 degrees.
0 + θ) degree winding, and the time-axis compressed audio PCM signal is recorded in the θ portion. FIG. 2 shows the tape running system, and FIG. 3 shows the track pattern. In FIG. 2, 10 is a magnetic tape, 12 is a rotary cylinder, and 14 and 1.
6 is a magnetic head. In FIG. 3, 18 is a video signal recording area, and 19 is an audio PCM signal recording area (hatched portion). The video signal recording area 18 corresponds to 180 degrees of the rotary cylinder 12, and the PCM signal recording area 19
Is θ degrees.

As described above, a recording method has been proposed in which the track is extended and the PCM signal is recorded in the extended portion. As an application of this, a recording method in which a still image is digitally recorded in the PCM signal recording area 19 is proposed. There is. Only a small number of PCM signal recording areas 19 are used to record one still image. According to this recording method, a still image can be recorded on the same recording medium by using the same imaging system as that for capturing a moving image, which is very convenient. Furthermore, stop the magnetic tape,
It is possible to obtain a still image reproduction signal of higher image quality than the conventional still image output obtained by repeatedly reproducing the same track.

[0005]

However, in a camera-integrated VTR having a still image recording function as described above, when the flash or strobe, which is an auxiliary light source for still image shooting, is illuminated during moving image shooting, A bright moving image will be recorded for a moment, and the reproduced image will be unsightly.

It is an object of the present invention to provide a recording device that solves such problems.

[0007]

A recording device according to the present invention is a recording device for recording a moving image and a still image respectively in predetermined different areas of a recording medium, and a memory means for storing at least one frame of a photographed image. And a switching means for switching between the captured video and the video output from the memory means, which is always connected to the captured video, a recording means for recording the output of the switching means on a recording medium, and a synchronization with strobe light emission. A recording device comprising: a control means for switching the switching means to an output image of the memory means.

A recording device according to a second aspect of the present invention is a recording device for recording a moving image and a still image in predetermined different areas of a recording medium, and a memory means for storing at least one frame of a captured image, and a captured image. And a video output from the memory means, which is always connected to the captured video, a recording means for recording the output of the switching means on a recording medium, a detection means for detecting external light emission, And a control means for switching the switching means to the output video of the memory means according to the detection output of the detection means.

[0009]

With the above-mentioned means, the frame which has become bright due to its own strobe light emission or external light emission is replaced by the immediately preceding frame having no influence in the photographed image. This prevents the screen from becoming bright for a moment when reproduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Reference numeral 20 denotes an image sensor that converts an optical image into an electric signal,
Reference numeral 22 denotes a camera signal processing circuit that subjects the output signal of the image pickup device 20 to camera signal processing such as gamma correction and outputs as a standard format video signal.

Reference numeral 24 is an A / D converter for digitizing the video signal output of the camera signal processing circuit 22, 26 is an image memory for storing the output data of the A / D converter 24 for at least one screen, and 28 is an image memory 26. A D / A converter for returning the video data read from the device to an analog signal, and 30 is a timing generation circuit for generating a timing signal for writing and reading the image memory 26. These circuits 2
Reference numerals 4, 26, 28 and 30 are circuits for holding a frame which replaces a frame which is brightened by stroboscopic light emission for still image shooting.

Reference numeral 32 denotes a changeover switch for changing over the output of the camera signal processing circuit 22 or the output of the D / A converter 28, which is normally connected to the a-contact which is the output side of the camera signal processing circuit 22. 34 is a recording processing circuit for recording the video signal selected by the changeover switch 32,
Reference numeral 36 is a magnetic head, and 38 is a magnetic tape. Reference numeral 40 denotes a view finder for displaying the video signal output of the changeover switch 32 as a video.

Reference numeral 42 is an A / D converter for digitizing the video signal output of the camera signal processing circuit 22, and 44 is an A / D.
An image memory that stores the output data of the converter 42 as a still image for at least one screen, 46 is a rate conversion circuit that performs rate conversion of the image data read from the image memory 44, and 48 is compression of the output data of the rate conversion circuit 46. A compression circuit 50, a PCM processing circuit 50 for adding an error detection / correction code, an ID, a block address, etc. to the output data of the compression circuit 48 and performing an interleave process, and a image memory 4
4, a timing generation circuit that supplies necessary timing signals to the rate conversion circuit 46, the compression circuit 48, and the PCM processing circuit 50.

Reference numeral 54 is a system control circuit for controlling the whole,
56 is a release switch for instructing still image recording, 58
Is a strobe control circuit for controlling strobe light emission.

Next, the operation of this embodiment will be described.

First, the case of recording only a moving image will be described. As for the output of the image sensor 20, the camera signal processing circuit performs camera signal processing on the electric signal of the subject image output from the image sensor 20 and outputs a corresponding video signal. The output of the camera signal processing circuit 22 is applied to the recording processing circuit 34 and the viewfinder 40 via the switch 32. The recording processing circuit 34 records the input video signal, and the output is recorded in the video recording area 18 of the magnetic tape 38 by the magnetic head 36. The view finder 40 displays the image being captured.

The output of the camera signal processing circuit 22 is digitized by the A / D converter 24, and the image memory 2 is successively read.
One frame is stored in 6. The video data stored in the image memory 26 is read out under the timing control of the timing generation circuit 30, converted into an analog signal by the D / A converter 28, and supplied to the b contact of the switch 32. That is, the b contact of the switch 32 has its a
The video signal one frame before the video signal supplied to the contact is supplied.

The output of the camera signal processing circuit 22 is also applied to the A / D converter 42, digitized and applied to the image memory 44. However, when a still image is not recorded, the system control circuit 54 generates a timing signal. Do not activate circuit 44. As a result, the image memory 44, the rate conversion circuit 46, the compression circuit 48, and the PCM processing circuit 50 are inactive.

When recording a still image, the system control circuit 54 operates the timing generation circuit 52 in response to the release switch 56 to write one frame of the video data output from the A / D converter 42 into the image memory 44. Let The video data stored in the image memory 44 is read out, the rate conversion circuit 46 performs rate conversion, and the compression circuit 48.
Compresses the data, and the PCM processing circuit 50 converts it into PCM data. The output of the PCM conversion circuit 50 is the magnetic head 3
6 is recorded in the PCM signal recording area 19 of the magnetic tape 38.

The operation of recording a still image using a flash while recording a moving image will be described. In this case, the system control circuit 54 causes the strobe control circuit 58 to emit a strobe light in response to the operation of the release switch 56, switches the changeover switch 32 to the b contact in synchronization with the light emission, and causes the timing generation circuit 30 to display an image. Memory 2
The read command of No. 6 and the write command of the image memory 44 are applied to the timing generation circuit 52. After the flash emission is completed, the changeover switch 32 is changed over to the a contact.

By switching the changeover switch 32 to the b contact and reading the image memory 26, a video signal of one frame before, which is not affected by stroboscopic light emission, is applied to the recording processing circuit 34 and the finder 40. Further, by writing the image memory 44 in synchronization with strobe light emission, image data of a bright subject by the strobe is written in the image memory 44.

FIG. 4 shows a block diagram of the configuration of a modified embodiment of the present invention. During the recording of a moving image, the strobe light of another person is often irradiated toward the subject. In the embodiment shown in FIG. 4, even in such a case, the recorded moving image is not adversely affected. In the embodiment of FIG. 4, a light receiving element 60 for detecting external light emission is provided, and the system control circuit 62 controls the reading of the image memory 26 by the changeover switch 32 and the timing generation circuit 30 according to the output of the light receiving element 60. . The other elements are the same as those in FIG. 1 and are given the same reference numerals.

The light receiving element 60 detects external light emission from another person's strobe light, and the system control circuit 62 detects the light receiving element 60.
The changeover switch 32 is controlled so as to be changed over to the b-contact according to the output of the above, and the read instruction of the image memory 26 is supplied to the timing generation circuit 30. After the external light emission is completed, the changeover switch 32 is changed over to the a contact. This makes it possible to remove the frame affected by external light emission from the recorded moving image.

Although the present invention has been described with respect to a recording apparatus having a still image recording function, it goes without saying that the present invention can be applied to a recording apparatus for recording only moving images, that is, a so-called camera-integrated video tape recorder. Absent.

Further, it can also be used as an editing apparatus for removing a frame which is momentarily brightened by a strobe or flash from a moving image once recorded on a recording medium. In this case, a circuit for detecting the average brightness of the video to be edited is provided, and another frame is substituted for according to the detection result.

[0027]

As can be easily understood from the above description, according to the present invention, even if there is stroboscopic light emission during recording of a moving image, a video signal in which the influence thereof is removed can be recorded. Therefore, the unpleasantness that the reproduced video suddenly becomes bright is eliminated.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of an embodiment of the present invention.

FIG. 2 is a plan view of a tape running system.

FIG. 3 is a track pattern of the magnetic tape 10.

FIG. 4 is a configuration block diagram of a modified embodiment of the present invention.

[Explanation of symbols]

10: Magnetic tape 12: Rotating cylinder 14, 16:
Magnetic head 18: Video signal recording area 19: PCM signal recording area 20: Image sensor 22: Camera signal processing circuit 24: A / D converter 26: Image memory 28: D
/ A converter 30: Timing generation circuit 32: Changeover switch 34: Recording processing circuit 36: Magnetic head 3
8: Magnetic tape 40: View finder 42: A
/ D converter 44: image memory 46: rate conversion circuit 48: compression circuit 50: PCM processing circuit 52: timing generation circuit 54: system control circuit 56: release switch 58: strobe control circuit 60: light receiving element 62:
System control circuit

Claims (2)

[Claims] 1. A recording device for recording a moving image and a still image respectively in predetermined different areas of a recording medium, wherein the recording device stores at least one frame of a photographed video, and the photographed video and the memory are outputted from the memory. Switching between video and video, and switching means that is always connected to the captured video, recording means that records the output of the switching means on a recording medium, and switching the switching means to the output video of the memory means in synchronization with strobe light emission. A recording apparatus provided with a control means. 2. A recording device for recording a moving image and a still image respectively in predetermined different areas of a recording medium, wherein the recording device stores at least one frame of a photographed video, and the photographed video and the memory are outputted from the memory. Depending on the detection output of the switching means for switching the video and always connecting to the captured video, the recording means for recording the output of the switching means on the recording medium, the detecting means for detecting the external light emission, and the detection output of the detecting means. A recording device comprising: a control means for switching the switching means to an output image of the memory means.