JPH0795535A - Image pickup recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve a picture quality processing function at the time of repro duction by arbitrarily performing picture quality working at the time of repro duction by recording a video signal in the recording and reproducing device in a state of an imaging device output as it is and performing picture quality processing to a regenerative signal. CONSTITUTION:According to set conditions based on the control of a controller 16, a picture quality control circuit 11 works a picture corresponding to the purpose and request of a photographing person. At such a time, the video signal image-picked-up by an imaging device 2 is recorded in a recording medium 7 as it is. Besides, since the set condition data of picture working performed at the time of photographing are recorded in the recording medium 7, when reproducing a VTR 15, the working conditions of the picture quality control circuit 11 are automatically set corresponding to these data, and a picture quality control operation performed at the time of photographing can be reproduced. Further, since the working conditions are changed through the controller 16 at the time of reproduction, working different from picture working performed at the time of photographing can be performed or a pure picture subjected to no working at all can be provided as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording / reproducing apparatus such as a VTR integrated video camera having an image quality controlling function, and more particularly to an image recording / reproducing apparatus capable of improving the image quality controlling function during reproduction. .

[0002]

2. Description of the Related Art As a technique for extracting a region of a specific object from a video signal during image pickup and controlling image quality, for example, Japanese Patent Laid-Open No.
As described in Japanese Patent No. 205070, it is known to extract an arbitrary subject in an imaging screen and correct the frequency characteristic, brightness, gain, and time axis of the image in that region.

FIG. 6 is a block diagram showing an example of the image recording / reproducing apparatus having the image quality control function as described above. In FIG. 6, 1 is a lens, 2 is an image sensor, and 3 is an A / D (analog). / Digital) converter, 4 is a front-end signal processing circuit,
5 is a D / A (digital / analog) converter, 6 is a recording processing circuit, 7 is a recording medium, 8 is a reproduction processing circuit, 11 is an image quality control circuit, 12 is a color encoder, 15 is a VTR,
Reference numeral 20 is a color encoder, and 21 is a decoder.

In the configuration shown in FIG. 6, the subject image formed on the light receiving surface of the image pickup device 2 by the lens 1 is photoelectrically converted, and after being converted into a digital signal by the A / D converter 3,
It is supplied to the preceding signal processing circuit 4. Pre-stage signal processing circuit 4
Then, the supplied complementary color signals are subjected to color separation, gamma processing, etc. to obtain separated luminance signals and color difference signals. The image quality of some or all of these signals is electronically controlled by the image quality control circuit 11 according to the purpose. The output signal of the image quality control circuit 11 is modulated into a standard signal such as NTSC by the color encoder 20, converted into an analog color signal by the D / A converter 5, and then supplied to the VTR 15 through the decoder 21. In the VTR 15, the supplied color video signal is subjected to standard processing such as modulation and frequency conversion for recording on the recording medium 7 by the recording processing circuit 6, and then recorded on the recording medium 7 such as a magnetic tape. The signal reproduced from the recording medium 7 is subjected to reproduction processing such as demodulation and frequency conversion again in the reproduction processing circuit 8 and then output as a color video signal in the color encoder 12.

As described above, the conventional image recording / reproducing apparatus with the image quality control function records the signal after the image quality processing on the recording medium such as a magnetic tape.

[0006]

By the way, in the above-mentioned conventional image-pickup recording / reproducing apparatus with an image quality control function, since image processing has already been performed on a part or the whole area of a photographing signal at the time of recording, processing is performed at the time of reproduction. Even if you want to see a pure image that is not played, there was a problem that this could not be played.

Further, in the conventional image pickup recording / reproducing apparatus with the image quality control function, since the signal processing section for processing the output signal of the image pickup device and the color modulation circuit (color encoder) at the time of reproducing the VTR are separately provided, the circuit is formed. There was also the problem of increased scale.

The present invention has been made in view of the above points,
An object of the invention is to improve image quality processing function at the time of reproduction by enabling arbitrary image quality processing at the time of reproduction in an image recording / reproducing apparatus including an image capturing unit, a video signal recording unit, and an image quality processing unit. It is in.

[0009]

In order to achieve the above-mentioned object, the present invention provides an image sensor, an image sensor signal processing section for processing an output signal of the image sensor, and an image quality control for performing an image quality process on a video signal. In an imaging recording / reproducing apparatus including a recording section and a recording / reproducing apparatus such as a VTR for recording / reproducing a video signal, an image quality control section, which has been installed in the former stage of the recording / reproducing apparatus, is installed in the latter stage of the recording / reproducing apparatus. It is configured to perform image quality control on the reproduced video signal of the recording / reproducing apparatus.

Further, at the time of shooting, the image signal processed by the image quality control unit according to the image quality processing conditions set at the time of shooting is supplied to the viewfinder, and the image of the viewfinder screen is processed at the time of playback. The image is processed so that it can be visually recognized.

Furthermore, the recording / reproducing apparatus records the signal supplied from the image pickup device signal processing section, and at the time of reproduction, the recording / reproducing apparatus supplies the reproduction signal to the image quality control section, and the image quality control section is provided with a subsequent stage. A color encoder for generating a color video signal is provided.

[0012]

In the recording / reproducing apparatus, a video signal as it is output from the image sensor is recorded and the reproduced signal is subjected to image quality processing.
During playback, you can freely process the image quality according to your purpose and preference.
Further, when the image quality control is not performed, a pure image that has not been processed can be obtained.

Even when the recording / reproducing apparatus records the video signal as it is output from the image pickup device, the viewfinder displays the video image processed under the image quality processing conditions set at the time of shooting. The person can take a picture by referring to this (while confirming the image quality processing performed at the time of reproduction).

Furthermore, since a part of the signal processing circuit for the output of the image pickup device and the output of the recording / reproducing apparatus is made common, the circuit can be simplified.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS.

1 and 2 relate to a first embodiment of the present invention. FIG. 1 is a block diagram of an image recording / reproducing apparatus according to the present embodiment, and FIG. 2 shows a video signal state of each block in FIG. It is a schematic representation.

In FIG. 1, 1 is a lens, 2 is an image pickup element, 3 is an A / D converter, 4 is a front stage signal processing circuit, and 5 is D.
/ A converter, 6 a recording processing circuit, 7 a recording medium such as a magnetic tape, 8 a reproduction processing circuit, 9 an A / D converter, 10
Is a camera / recording medium signal selector switch (hereinafter referred to as selector switch 10), 11 is an image quality control circuit, 12 is a color encoder, 13 is a D / A converter, 14 is a viewfinder, 15 is a VTR, 16 is an image quality control The controller (hereinafter, referred to as the controller 16).

A subject image ((a) in FIG. 2) formed on the light receiving surface of the image pickup device 2 by the lens 1 is photoelectrically converted to A /
After being converted into a digital signal by the D converter 3, the signal is supplied to the preceding stage signal processing circuit 4. The pre-stage signal processing circuit 4 performs color separation, gamma processing, etc. on the supplied complementary color signal to separate it into a luminance signal and a color difference signal. These luminance and color difference signals are supplied to the A side of the change-over switch 10 and D /
It is converted into an analog signal by the A converter 5 and is also supplied to the VTR 15. In the VTR 15, similarly to the conventional technique shown in FIG. 6, the supplied luminance / color difference signal is subjected to standard processing such as modulation and frequency conversion in the recording processing circuit 6 and recorded on the recording medium 7. Further, during reproduction of the VTR 15, the video signal reproduced on the recording medium 7 ((b) of FIG. 2) is subjected to reproduction processing such as demodulation and frequency conversion by the reproduction processing circuit 8, and this is processed by the A / D converter 9. After being converted into a digital signal by, the signal is supplied to the B side of the changeover switch 10.

The changeover switch 10 is switched to the A side to select the output of the preceding stage signal processing circuit 4, and is switched to the B side to select the reproduction signal of the VTR 15. The signal selected by the changeover switch 10 is supplied to the color encoder 12 via the image quality control circuit 11,
A color video signal is formed from the digital luminance / color difference signal and is output as an analog signal by the D / A converter 13.

Here, the image quality control circuit 11 processes the image according to the purpose and preference of the photographer according to the setting conditions under the control of the controller 16. As an example of the processing, the background of the target subject is erased is shown in FIG. At this time, the video signal as it is captured by the image sensor 2 is recorded on the recording medium 7. Further, the setting condition data of the image processing performed at the time of shooting (the image quality control data of the image quality control circuit 11 and the data of the image quality control area) is recorded.
When the VTR 15 is reproduced, the processing conditions of the image quality control circuit 11 are automatically set by recording the data in the control area such as the video sub-code, and the image quality control operation performed at the time of shooting can be reproduced. Further, by changing the processing condition via the controller 16 during reproduction, it is possible to perform processing different from the image processing performed at the time of shooting, or obtain a pure image without any processing. It is also possible to rewrite the changed processing conditions in the control area.

When the image quality processing condition is set at the time of shooting, the video signal after being processed by the image quality control circuit 11 according to the image quality processing condition set at the time of shooting is supplied to the viewfinder 14 and then to the viewfinder 14. Displays the image processed under the set image quality processing conditions,
Even if the VTR 15 is configured to record the video signal as it is output from the image pickup device, the photographer can take a picture by referring to this (while confirming the image quality processing performed at the time of reproduction).

FIG. 3 is a block diagram of an image pickup / recording / reproducing apparatus according to the second embodiment of the present invention. In the figure, 17 is a recording processing circuit for performing standard processing such as data compression, 18 is a reproduction processing circuit for performing processing such as demodulation of a reproduction signal, 19 is a digital VTR, and other components are shown in FIG. It is similar to the first embodiment. In the digital VTR 19 of this embodiment, the recording processing circuit 17 performs standard processing such as data compression and modulation on the digital video signal supplied from the preceding signal processing circuit 4 and records it on the recording medium 7. At the time of reproduction, the signal reproduced from the recording medium 7 is subjected to processing such as demodulation and data expansion in the reproduction processing circuit 18, and is supplied to the changeover switch 10. The operation of the parts other than those described above is the same as that of the first embodiment. The present embodiment having such a configuration also has the same effect as that of the first embodiment. In this embodiment, the D / A converter 5 and the A / D conversion used in the first embodiment of FIG. 1 are used. The container 9 becomes unnecessary.

FIG. 4 is a block diagram of an image pickup / recording / reproducing apparatus according to the third embodiment of the present invention. In the figure, parts corresponding to those in FIGS. 1 and 3 are designated by the same reference numerals, and overlapping description will be omitted. In this embodiment, the digital VTR 1
A video signal output from the image quality control circuit 11 is supplied to 9 and a reproduction signal of the digital VTR 19 is supplied to the changeover switch 10 as in the above-described embodiments. When shooting and recording on the digital VTR 19 (when the changeover switch 10 selects the A side), the image quality control circuit 11 should not perform any image processing under the control of the controller 16. To be As a result, recording is performed on the digital VTR 19 as in the second embodiment shown in FIG. The other parts are the same as those in the second embodiment, and the same effect can be obtained.

FIG. 5 is a block diagram of an image pickup / recording / reproducing apparatus according to the fourth embodiment of the present invention. In the figure, 22 is a time axis converter including a frame memory, an electronic magnifier,
Reference numeral 23 is a motion detection circuit for detecting a motion vector between fields or frames of a video signal by image correlation or the like, and the other components are the same as those in the first embodiment shown in FIG. In the present embodiment having the configuration as shown in FIG. 5, the time axis converter 23 performs time axis conversion according to the motion vector data (camera shake vector) of the image detected by the motion detection circuit 23. Then, at the time of shooting and recording on the VTR 15, (the changeover switch 1
(When 0 selects the A side), the time axis converter 22
The control data such as the enlargement ratio and the motion vector detected by the motion detection circuit 23 are recorded in the control area such as the video subcode of the recording medium 7. This gives V
During playback of TR15, the time axis converter 2 uses this data.
The control conditions of No. 3 are automatically set, and it is possible to obtain a reproduced image in which the camera shake is corrected in the same manner as that at the time of shooting. Further, by changing the enlargement ratio and the motion vector during the reproduction of the VTR 15, it becomes possible to arbitrarily correct the camera shake during the reproduction of the VTR 15. A similar effect can be obtained by using a method using an external angular velocity sensor or the like as a method of detecting the motion vector.

[0025]

As described above, according to the present invention, a video signal as it is output from an image pickup device is recorded on a recording medium such as a magnetic tape, and a reproduced signal from the recording medium is subjected to image processing. Can be processed arbitrarily.

Further, according to the present invention, since only one color encoder, which is conventionally provided in two, is provided, the circuit structure can be simplified.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an image capturing / recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a schematic image state of each block in FIG.

FIG. 3 is a block diagram showing a configuration of an image capturing / recording / reproducing apparatus according to a second embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of an image capturing / recording / reproducing apparatus according to a third embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of an image capturing / recording / reproducing apparatus according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of an imaging recording / reproducing apparatus according to a conventional example.

[Explanation of symbols]

1 lens 2 image sensor 3 A / D converter 4 pre-stage signal processing circuit 5 D / A converter 6 recording processing circuit 7 recording medium 8 reproduction processing circuit 9 A / D converter 10 camera / recording medium signal changeover switch (changeover switch) ) 11 image quality control circuit 12 color encoder 13 D / A converter 14 viewfinder 15 VTR 16 image quality control controller (controller) 17 recording processing circuit 18 reproduction processing circuit 19 digital VTR 20 color encoder 21 decoder 22 time axis converter 23 motion detection circuit

Claims (7)

[Claims] 1. An image pickup device for photoelectrically converting a subject image formed by an optical lens, a signal processing circuit for processing an output signal of the image pickup device to generate a video signal, and a recording device for recording and reproducing the video signal. In an imaging recording / reproducing device including a reproducing device, an image quality control circuit for electronically controlling image quality of a reproduced video signal of the recording / reproducing device and a signal of a part or all of an output video signal of the signal processing circuit is provided. An image capturing / recording / reproducing apparatus, which is provided. 2. An image pickup device for photoelectrically converting a subject image formed by an optical lens, a signal processing circuit for processing an output signal of the image pickup device to generate a video signal, and a recording device for recording and reproducing the video signal. In an imaging recording / reproducing device including a reproducing device, the image recording / reproducing device has a switch for selecting either a reproduced video signal of the recording / reproducing device or an output video signal of the signal processing circuit, and one of the video signals selected by the switch. An image pickup / recording / reproducing apparatus provided with an image quality control circuit for electronically controlling the image quality of signals in all or all areas. 3. The image recording / reproducing apparatus according to claim 1, wherein the image quality control data of the image quality control circuit and the data of the image quality control area are recorded in the recording / reproducing apparatus together with the video signal. 4. The image recording / reproducing apparatus according to claim 3, wherein the image quality control circuit is controlled by image quality control data recorded in the recording / reproducing apparatus and data of an image quality control area. 5. The image recording / reproducing apparatus according to claim 1, wherein the image quality control data of the image quality control circuit and the data of the image quality control area are rewritable. 6. An image pickup device for photoelectrically converting a subject image formed by an optical lens, a signal processing circuit for processing an output signal of the image pickup device to generate a video signal, and a recording device for recording and reproducing the video signal. A reproduction device, a time axis conversion means for electronically enlarging a partial area of a reproduction video signal of the recording / reproduction device, and a motion detection for detecting a motion between fields or frames of the video signal by an external sensor or image correlation. And a control vector such as a motion vector detected by the motion detection means and an enlargement ratio of the time axis conversion means, and recorded in the recording and reproduction apparatus together with a video signal at the time of shooting, Further, at the time of reproduction, the time axis conversion means is controlled by the control data already recorded in the recording / reproduction apparatus. 7. The imaging recording / reproducing apparatus according to claim 6, wherein the data of the enlargement factor and the motion vector are rewritable.