JPS636990A - Camera incorporated with recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify a device and to lower cost by using an edge emphasis circuit at the time of recording and reproducing. CONSTITUTION:At the time of a photofraphing recording operation mode, the common poles 20c, 34c, 42c of switches 20, 34, 42 are respectively connected to R terminals 20a, 34a, 42a. In such a operation mode, the photographing video signal of an object is fed from an image pickup circuit 10, the Y signal has the edge part thereof emphasized by the edge emphasis circuit 22 and is supplied to an FM modulation circuit 24 and an adder 26. In case of a reproduction operation mode, the common poles 20c, 34c, 42c of the switches 20, 34, 42 are respectively connected to PB terminals 20b, 34b, 42b. The switches 20, 34, 42 are switched by interlocking with the selection operation of the reproduction operation mode. Thereby, the edge emphasis processing can be applied to the photographing video signal and a reproduced video signal by simple circuit constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device that integrates a photographing and recording camera and a recording and reproducing device.

[Conventional technology]

Conventionally, for example, in a camera-integrated VTR device, by applying an output luminance signal obtained from a camera for shooting and recording to a luminance signal edge emphasis circuit, the edges of the recorded video signal are emphasized and recorded. Regarding the reproduced signal from the reproduced signal, before adding the reproduced luminance signal separated from the reproduced signal and the reproduced carrier color signal, the reproduced luminance signal is used to emphasize the edges of the reproduced luminance signal using another luminance signal edge emphasis circuit. I was going. In other words, the conventional camera-integrated VTR device has
It was equipped with an edge emphasis circuit for reproduced signals in addition to an edge emphasis circuit for recorded signals.

[Problems to be solved by the invention] Compactness and weight reduction are strong (desirable camera-integrated VTR devices are equipped with duplicate circuits with similar functions that are not used at the same time for recording and playback) This is wasteful and undesirable.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a camera-integrated recording and reproducing device that can be manufactured at low cost by simplifying the circuitry while maintaining the functions of the device.

Another object of the present invention is to provide a camera-integrated recording and reproducing apparatus that performs edge enhancement on not only the luminance signal component but also the chrominance signal component, thereby obtaining a reproduced video image of better quality.

[Means for solving problems]

The camera-integrated recording and reproducing device of the present invention is a device that integrates a photographing and recording camera and a recording and reproducing device, and includes an edge emphasis circuit that emphasizes the edge portion of a video signal, and an edge enhancement circuit that emphasizes the edge portion of a video signal, and a first switching circuit that connects a luminance signal component of a video signal and a luminance signal component of a reproduced video signal from the recording and reproducing device to the edge emphasis circuit in a manner that allows switching; The second switching circuit is configured to switch and output the color signal component of the photographed video signal and the color signal component of the reproduced video signal in a switchable manner.

Further, a camera-integrated recording and reproducing device, which is a second invention of the present application, is a device that integrates a camera for photographing and recording and a recording and reproducing device, and is a device that integrates a recording and recording camera and a recording and reproducing device. an edge emphasis circuit, a color difference signal edge emphasis circuit that emphasizes an edge portion of a color difference signal of a video signal, a demodulation circuit that demodulates a carrier color signal of a reproduced video signal from the recording and reproducing device into a color difference signal, and a first switching circuit that connects the luminance signal component of the photographed video signal from the camera and the luminance signal component of the reproduced video signal to the forest intensity signal edge enhancement circuit; and the color difference signal component of the photographed video signal and
and a second switching circuit that connects the reproduced color difference signal component from the demodulation circuit to the color difference signal enhancement circuit in a switchable manner.

[Effect]

With the configuration of the first invention described above, the edge emphasis circuit can be used both during recording and during reproduction, and the apparatus can be simplified and reduced in cost.

Furthermore, with the configuration of the second aspect of the invention described above, it is possible to emphasize the edge portions of the color signal components as well, thereby improving the image quality of the reproduced video.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The television signal described here is an NTSC system, and the recording system is a luminance signal FM modulation/chrominance signal low frequency conversion multiplex recording system, but the present invention is applicable to other television systems, such as France and the Soviet Union. In principle, it can be applied to the SECAM system such as those of Japan, the PAL system of Germany and the United Kingdom, and other recording systems.

FIG. 1 shows a configuration block diagram of an embodiment in which edge emphasis is applied to a luminance signal (Y signal) of a video signal.

Reference numeral 10 denotes an imaging circuit equipped with an imaging device such as a CCD, and three output lines 12, 14, 1 of this imaging circuit 10
6, Y (No. 3) and two color difference signals R-Y signal and B-Y signal are sent respectively. Since the a function and configuration of the imaging circuit 10 are well known to electronic engineers, a detailed explanation will be given below. Omitted.

The line 12 is Rb of the single-pole double-throw flow path changeover switch 20.
? Connect to child 20a. The common pole 20c of the switch 2o is connected to the input of the Y signal edge emphasis circuit 22. The output of the edge emphasis circuit 22 is connected to the input of the FM modulation circuit 24 and also to one input of the adder.

The R-Y signal on line 14 and the B-Y signal on line 16 are input to a quadrature two-phase balanced modulation circuit 28. This modulation circuit 28 receives 3.58MH from the local oscillation circuit 30.
The subcarrier of z is also input, and the modulation circuit 28 is
This subcarrier is quadrature two-phase balanced modulated with two color difference signals R-Y and B-Y to form a carrier color signal, which is output on line 32. Quadrature two-phase balanced modulation circuit 28 in this embodiment
has a common function in the technical field of video signal processing and has little relevance to the content of the present invention, so further explanation will be omitted.

The line 32 is connected to the R of a single-pole double-throw switch 34 for switching the flow path.
Connect to terminal 34a. A common pole 34c of the switch 34 is connected to an input of the delay circuit 36.

This delay circuit 36 is for delaying the C signal by an amount corresponding to the time delay of the Y signal by the edge emphasis circuit 22. The output of the delay circuit 36 is connected to another input of the adder 26 and to the input of a frequency conversion circuit 38 which converts the frequency from 3.58 MHz to 743 K1) for recording at low frequencies. do.

The output of the adder 26 is the video output terminal ■. Connect to U□,
This output terminal■. An NTSC composite video signal is supplied from u7 to an external monitor TV or electronic viewfinder.

The output of FM modulation circuit 24 is connected to one input of adder 40 and the output of frequency conversion circuit 38 is connected to another input of adder 40. Adder 40 forms a multiplex signal for magnetic tape recording. The output of the adder 40 is connected to the R terminal 42a of the flow path changeover switch 42, and its common pole 42C
is connected to the recording/playback head 44. The recording/reproducing head 44 records the video signal on the magnetic tape 46 and also reproduces the video signal recorded on the magnetic tape 46 and supplies it to the switch 42 .

In addition to this recording circuit system, p of the amplitude of the Y signal component is included.
An automatic gain adjustment circuit (AGC) that automatically adjusts the p value to match the reference value, a circuit that pre-emphasizes the Y signal during FM modulation, and a comparison of the amplitude of the color burst signal, which should always be constant, with the reference signal. Accordingly, an automatic color signal amplitude adjustment circuit (ACC) for controlling the pp value of the C signal component of the delay circuit 36 to a reference value is connected to an appropriate location, but these circuits are not included in the content of the present invention. Since it is not directly related, the explanation will be omitted.

The VTR reproducing circuit system is as follows. P of switch 42
The B terminal 42b is connected to the input of a high-pass filter (HPF) 50 that extracts the modulated luminance signal component from the reproduced signal. H
The output of the PF 50 is connected to the input of the FM demodulation circuit 52 that demodulates the Y signal from the FM modulated luminance signal.
The output of 2 is connected to the PB terminal 20b of the switch 20.

The PB terminal 42b of the switch 42 is also connected to a low-pass filter (LPF) 54 that extracts a low-pass carrier color signal component from the reproduced signal. The output of LPF54 is 3.58M)
The output of the frequency conversion circuit 56 is connected to the input of the frequency conversion circuit 56 that converts into the Iz frequency band, and the output of the frequency conversion circuit 56 is connected to the switch 3.
Connect to the PB terminal 34b of No.4.

The frequency conversion circuit 56 includes a local oscillation circuit 58 and a
3. Under the control of the PC and AFC circuit 60, the low frequency carrier color signal from the LPF 54 is transmitted. b Frequency conversion is performed to a carrier color signal of 8 MHz. The APC and AFC circuit 60 is a known circuit that automatically controls the phase and frequency of the color signal, and receives the output of the frequency conversion circuit 56 (particularly its color burst signal), and also receives the output from the FM demodulation circuit 52 (Y signal). Receives the horizontal synchronization signal of the reproduced video signal.

In the reproduction circuit system, 1. In addition to this, dropout correction, noise cancellation, time axis correction, etc. are performed, but since they are not directly related to the present invention, their explanation will be omitted.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

First, in the shooting/recording operation mode, switch 20.34
．． 42 common poles 20c, 34c, and 42C are respectively,
Connect to R terminals 2Qa, 34a, and 42a. In this operation mode, a captured image signal of the subject is sent from the imaging circuit 1o, and its Y signal is processed by the edge emphasis circuit 22.

The digital signal is emphasized and supplied to an FM modulation circuit 24 and an adder 26. The FM modulation circuit includes an FM modulation multiplied signal adder 4
Supply to 0.

On the other hand, the quadrature two-phase balanced modulation circuit 28 performs quadrature two-phase balanced modulation on the subcarrier of the oscillation circuit 30 using the color difference signals R-Y and B-Y from the imaging circuit 10, and the output carrier color signal is as follows.
The signal is supplied to a frequency conversion circuit 38 and an adder 26 via a delay circuit 36.

The low-pass carrier color signal, which has been reduced to a lower frequency of 743KIIz by the frequency conversion circuit 38, is supplied to another input of the adder 40.

The NTSC composite video signal, which is the output of the adder 26, is sent to the video output terminal (2). U, external monitor TV,
It is supplied to an electronic viewfinder, etc., and used for monitoring recorded images.

The output of the adder 40 is applied to a recording/reproducing head 44 via a switch 42 and magnetically recorded on a magnetic tape 46.

In the regeneration operation mode, the common poles 20c, 34c, 42c of the switches 20, 34° 42 are connected to the PB terminal 20, respectively.
b, 34b, and 42b. The switches 20, 34, and 42 are configured to change in this way in conjunction with the selection operation of the playback operation mode.
The luminance signal (Y signal) and the carrier chrominance signal (C signal) are restored by the known operation of the circuits 50, 52, 54, 56, 58, 60, and the Y signal is sent on the output line 62 of the FM demodulation circuit 52. C on the output line 64 of the frequency conversion circuit 56
A signal is sent out.

The reproduced Y signal on the line 62 is supplied to the edge emphasizing circuit 22 via the switch 20, and is subjected to edge emphasizing processing in the same manner as the Y signal of the shadow signal in the recording mode. Furthermore, the reproduced C signal on the line 64 is applied to the delay circuit 36 via the switch 34, where it is adjusted with the time delay of the Y signal due to the edge emphasis processing of the edge emphasis circuit 22.

The Y signal output from the edge emphasis circuit 22 is sent to the adder 2
6 and the C signal output from the delay circuit 36 is also applied to the adder 26, and the adder 26 connects the video output terminal
. NTS of playback video signal from ul to external monitor device
Outputs a C composite video signal.

FIG. 2 shows another embodiment in which the reproduced C signal is once demodulated into a color difference signal, and the color difference signal is also subjected to edge/edge enhancement processing at the color difference signal stage. However, for the same parts as in Figure 1,
The same symbols are given.

In the second recess, the R-Y signal ratio line 14 of the imaging circuit 10 is connected to the R terminal 70a of the flow path changeover switch 70,
The common pole 70c is connected to the input of the edge enhancement circuit 72. The output of the edge emphasis circuit 72 is the R of the balanced modulation circuit 28.
-Connect to Y signal input. On the other hand, B-Y of the imaging circuit 10
The signal line 16 is connected to the R terminal 7 of the flow path changeover switch 74.
4a, and its common pole 74C is connected to the edge enhancement circuit 76.
Connect to the input of The output of the edge enhancement circuit 76 is connected to the BY signal input of the balanced modulation circuit 28.

The output line 64 of the frequency conversion circuit 56 is connected to the input of a demodulation circuit 78 that demodulates the C signal to the color difference signal R-Y and the same B-Y. The BY signal ratio line 82 is connected to the PB terminal 74b of the switch 74. Demodulation circuit 78 receives the subcarrier from oscillation circuit 58 and demodulates the C signal under its phase and frequency.

The balanced modulation circuit 28 converts the demodulated color difference signal of the reproduced video signal into a C signal again, but for this purpose, phase information of the reproduced signal is required. Therefore, the subcarrier input to the modulation circuit 28 is input from the oscillation circuit 30 and from the oscillation circuit 58.
A switch 84 is provided so that it can be switched between
That is, the R terminal 84a of the switch 84 is connected to the output of the oscillation circuit 30, its PB terminal 84b is connected to the output of the oscillation circuit 58, and its common pole 84c is connected to the subcarrier input of the balanced modulation circuit 28.

In this embodiment, the time delay caused by the edge enhancement processing of the edge enhancement circuit 22 for the reproduced Y signal is balanced with the time delay caused by the edge enhancement processing of the edge enhancement circuits 72 and 76 for the reproduced color difference signal. The delay circuit 36 on the output side is not particularly necessary.

Also, of course, in this embodiment, the switch 34 of FIG. 1 is not required, so the output of the modulation circuit 28 is connected to the input of the frequency conversion circuit 38.

Other circuit connections are the same as in FIG.

Next, the operation of the embodiment shown in FIG. 2 will be explained.

In the embodiment of FIG. 2, in the photographing and recording operation mode, the common poles 20c and 4 of the switches 20.40, 70, 74.84
0c, 70c, 74c, and 84c are R terminals 20, respectively.
a, 40a, 70a, 74a, 34a. The Y signal from the imaging circuit 10 is edge-emphasized by an edge emphasis circuit 22, as in the case of FIG.

On the other hand, the color difference signals R-Y and B-Y from the imaging circuit 10 are
The edges are emphasized by edge emphasis circuits 72 and 76 and applied to the modulation circuit 28. The modulation circuit 28 performs quadrature two-phase balanced modulation on the subcarriers of the oscillation circuit 30 with the edge-emphasized color difference signals R-Y and B-Y, and the output carrier color signal is sent to the adder 26. The signal is sent to an adder 40 via a frequency conversion circuit 38.

The NTSC composite video signal output from the adder 26 is connected to the video output terminal ■. The signal is supplied to an external monitor, such as a TV, from the 0a, and is used to monitor recorded video.

The output of the adder 40 is applied to the recording/reproducing heads 4, 4 via the switch 42, and magnetically recorded on the magnetic tape 46.

In the case of playback operation mode, switch 20, 40°70.7
4.84 common pole 20c, 40c, 70G, 74C, 8
4C is the PB terminal 20b.

40b, 70b, 74b, 84b. Switch 20°40.70 in conjunction with the playback operation mode selection operation.
, 74.84 are switched like this.

When the magnetic tape 46 is reproduced, the Y signal is sent out on the output line 62 of the FM demodulation circuit 52 and the C signal is sent out on the output line 64 of the frequency conversion circuit 56, as described above.

The reproduced Y signal on the line 62 is supplied to the edge emphasizing circuit 22 via the switch 20, and is subjected to edge emphasizing processing in the same way as the Y signal of the photographing signal in the recording mode. The reproduced C signal on the line 64 is demodulated by the demodulation circuit 78 into the color difference signal R-Y and the same B-Y, and the color difference signal R-Y is inputted to the edge emphasis circuit 72 via the line 80 and the switch 70. The color difference signal B-Y is also input to the edge emphasis circuit 76 via a line 82 and a switch 74. The color difference signals R-Y and B-Y are sent to both edge emphasizing circuits 72.
The edges are emphasized in step 76 and returned to a C signal by quadrature two-phase balanced modulation in the balanced modulation circuit 28. This C signal is sent to adder 26.

The adder 26 adds the reproduced Y signal output from the edge emphasis circuit 22 and the reproduced C signal from the modulation circuit 28,
Video output terminal ■. An NTSC composite video signal, which is a reproduced video signal, is output from the UT to an external monitor device.

Although a corresponding effect can be expected by simply adding edge enhancement processing to the luminance signal component of the video signal, it is better to add edge enhancement processing to the color signal component at the same time to obtain reproduced images with more natural colors. . In particular, when edge enhancement processing is applied individually at the color difference signal stage as in the embodiment shown in FIG. 2, the hue of the reproduced video becomes extremely natural.

Note that when the photographed video signal and the reproduced video signal are once separated into a luminance signal component and a color signal component and then recombined after predetermined signal processing, the phase relationship between the luminance signal component and the color signal component must be kept constant. Needless to say, although not shown in the drawings, such a harmonizing circuit is provided at an appropriate location.

Furthermore, the edge enhancement circuits 22, 72, and 76 in the embodiments of FIGS. 1 and 2 include the functions of horizontal edge enhancement, vertical edge enhancement, or both, and the edge enhancement method itself is is not an element of the invention.

〔Effect of the invention〕

As can be easily understood from the above description, according to the present invention, edge enhancement processing can be performed on both the photographed video signal and the reproduced video signal with a simpler circuit configuration.
Furthermore, it is possible to provide a camera-integrated recording and reproducing device that can obtain reproduced video images of better quality.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a first embodiment of the invention, and FIG. 2 is a block diagram of another embodiment of the invention.

Claims (3)

[Claims] (1) A device that integrates a camera for photographing and recording and a recording and reproducing device, the device comprising: an edge emphasis circuit that emphasizes the edge portion of a video signal; a luminance signal component of the video signal from the camera for photographing and recording; A first circuit that connects to the edge emphasis circuit so as to be able to switch between the luminance signal component of the reproduced video signal from the recording and reproducing device.
and a second switching circuit that switches in conjunction with the first switching circuit and outputs the color signal component of the photographed video signal and the color signal component of the reproduced video signal in a switchable manner. A camera-integrated recording and reproducing device comprising: (2) Camera-integrated recording and reproduction according to claim (1), wherein the color signal component of the photographed video signal is a carrier color signal, and the color signal component of the reproduced video signal is a reproduced carrier color signal. Device. (3) A device that integrates a camera for shooting and recording and a recording/playback device, which includes a luminance signal edge enhancement circuit that emphasizes the edge portion of the luminance signal of the video signal and an edge portion of the color difference signal of the video signal. a color difference signal edge enhancement circuit; a demodulation circuit that demodulates the carrier color signal of the reproduced video signal from the recording/reproducing device into a color difference signal; a luminance signal component of the photographed video signal from the photographing/recording camera; a first switching circuit that connects the luminance signal edge enhancement circuit to the luminance signal edge enhancement circuit so as to switch between the luminance signal component of the photographed video signal and the demodulated color difference signal component of the photographed video signal; 1. A camera-integrated recording and reproducing apparatus, comprising: a second switching circuit that connects a reproduced color difference signal component from the circuit to the color difference signal edge enhancement circuit in a switchable manner.