JPH10164617A - Vtr integrated with camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To omit an LPF and BPF for band limitation from a VTR integrated with a camera and, at the same time, to simplify the mode switching circuit of the VTR, to reduce the circuit scale of the VTR, and to avoid the occurrence of overlapping band limitation. SOLUTION: In the conventional example, an LPF and BPF for recording band limitation are installed to the input stages of a luminance signal system and a color signal system in a signal processing circuit of a recording system by taking the occurrence of such a case that the signal of the signal processing system of a reproducing system is recorded on a VTR in a reproduction mode into consideration, but, in this invention, such a circuit configuration that a switch circuit S5 is installed to the luminance signal system of a signal processing circuit 1a of a camera system so that an LPF 12 can be used commonly in both a recording mode and a reproducing mode and a BPF 27 is installed to the output stage of the color signal system of a signal processing circuit 2a of a reproducing system. Therefore, the occurrence of overlapping band limitation can be avoided, because one LPF can be omitted as a whole and a mode switching circuit can be simplified in configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera-integrated VTR.
In connection with this, a filter circuit for a signal processing circuit mounted in the form of an IC and a switch circuit for mode switching are simplified,
The present invention relates to an improvement for miniaturizing a chip, reducing power consumption, and the like.

[0002]

2. Description of the Related Art A camera-integrated VTR in which a VTR is integrally mounted on a video camera has become widespread, and is widely used as means for recording and reproducing video for business use and home use. In recent years, a LCD (Liquid Crystal Display) is also integrally mounted to monitor an image being captured or an image read from a VTR or an external recording medium.

[0003] In a conventional camera-integrated VTR, an IC board on which required signal processing circuits and the like are integrated is mounted inside, and the basic circuit configuration is shown in FIG.
Specifically, it can be roughly divided into a camera system signal processing circuit 51, a reproduction system signal processing circuit 52, a recording system signal processing circuit 53, a video output system circuit 54, and a mode switching circuit 55.
The input side of the reproduction system signal processing circuit 52 is connected to a recording unit (not shown),
The output side of the recording system signal processing circuit 53 is connected to the recording section, and the output side of the video output system circuit 54 is connected to the mounted LC.
D or connected to an external display device.

Next, the configuration and function of each of the above circuits will be described. First, the camera system signal processing circuit 51 includes a luminance signal system and a color signal system. In the luminance signal system, the luminance signal (Y) obtained from the imaging circuit 11 constituted by a CCD is band-limited by a low-pass filter (hereinafter, referred to as “LPF”) 12, and a predetermined value is determined by a gamma correction circuit 13 and a contour enhancement circuit 14. Process and output. Here, the band limitation is performed by the LPF 12 in order to remove aliasing noise generated due to the clock of the imaging CCD and the sampling. For example, VHS (registered trademark) is used.
, The LPF 12 has a frequency characteristic as shown in FIG. In the color signal system, each color difference signal (RY, BY) obtained from the imaging circuit 11 is corrected by gamma correction circuits 15 and 16, respectively, and the corrected signals are converted to LP.
After limiting the band at F17 and F18, the encoder 19 performs quadrature two-phase modulation to create a color signal. The color signal is further band-limited by a bandpass filter (hereinafter referred to as "BPF") 20 and output. Here, the LPFs 17 and 18 are for removing aliasing noise similarly to the LPF 12 of the luminance signal system, and the BPF 20 is for limiting the band of the color signal at the center frequency of the color subcarrier. As described above, in the case of the VHS NTSC model, the LPFs 17 and 18 have frequency characteristics as shown in FIG. 6, and the BPF 20 has frequency characteristics as shown in FIG.

In a reproduction system signal processing circuit 52, a low-pass conversion carrier color signal is attenuated by a high-pass filter (HPF) 21 from a video signal read from a recording unit, and only an FM-modulated luminance signal is taken out. The luminance signal is removed and only the low-frequency conversion color signal is extracted. And the extracted FM
The modulated luminance signal is demodulated by the FM demodulation circuit 23, and then returned to the original luminance signal by the de-emphasis circuit 24 having a characteristic opposite to that of the pre-emphasis circuit (32) at the time of recording. The converted color signal is ACC (Automatic Chroma Co
ntrol) 25, the playback level is corrected and the frequency conversion circuit
At 26, the signal is demodulated to a carrier color signal by frequency conversion using the idler signal.

The recording-system signal processing circuit 53 is a circuit for creating a recording signal corresponding to a recording unit based on the luminance signal and the color signal obtained from the camera-system signal processing circuit 51 or the reproduction-system signal processing circuit 52. Consists of a luminance signal system, a color signal system, and a Y / C mixing circuit. In the luminance signal system, LP
In F31, the band for recording is limited, and in order to improve the S / N ratio, the high frequency is emphasized in the pre-emphasis circuit 32,
In order to prevent overshoot and undershoot due to the pre-emphasis, clipping is performed by the white / dark clipping circuit 33 and conversion to an FM luminance signal is performed by the FM modulation circuit 35. In the color signal system, the BPF 36 limits the band for recording, and the low-frequency conversion circuit 37 performs frequency conversion to a low frequency band using an idler signal.
Removes unnecessary upper sideband components. Then, a recording signal in which the FM luminance signal and the lower color sideband component are mixed by the Y / C mixing circuit 39 is output to the recording unit side.

The video output system circuit 54 comprises a Y / C mixing circuit 41, and the mode switching circuit 55 comprises two switch circuits S1 and S2 for a luminance signal system and two switch circuits S3 and S4 for a color signal system. As shown in the figure, each signal processing circuit 51, 52, 53
And video output system circuit 54, and each switch circuit
S1 to S4 are connected to the REC side in the recording mode and to the PB side in the reproduction mode based on the mode setting from the operation unit (not shown). Therefore, in the recording mode, the luminance signal and the color signal of the camera system signal processing circuit 51 are
Is input to the Y / C mixing circuit 41 of the video output circuit 54 to output a video output signal to the monitor. In the reproduction mode, the luminance signal and the color signal of the reproduction signal processing circuit 52 are output. The signal is input to the recording system signal processing circuit 53, and the output of the LPF 31 of the luminance system circuit and the output of the BPF 36 of the color system circuit of the recording system signal processing circuit 53 are transmitted to the noise suppression circuit 29 and the crosstalk removal circuit 28, respectively. The video signal is input to the Y / C mixing circuit 41 through the monitor and output to the monitor as a video output signal. The crosstalk removing circuit 28 and the noise suppressing circuit 29 are composed of a reproducing system signal processing circuit 52.
This signal is required when the signal on the side is output as a video, and is originally incorporated in the reproduction-system signal processing circuit 52.

In addition, the above-described camera-integrated VTR
The circuit configuration of each of the signal processing circuits 51, 52, and 53 shows only basic elements, and other signal processing elements may be incorporated as needed.

[0009]

In the circuit configuration of the camera-integrated VTR, the LPF 31 and the BPF 36 provided in the recording signal processing circuit 53 are necessary for the reproduction signal processing circuit 52 in the reproduction mode. However, when the signal on the camera-system signal processing circuit 51 side is processed in the recording mode, the band limitation is already performed by the LPFs 12, 17, and 18, so that it becomes an overlapping band limitation element. Also, as shown in FIG.
In the reproduction mode, the LPF 31 and the BP of the recording signal processing circuit 53 are used.
Since the luminance signal and the color signal output from the F36 are input to the Y / C mixing circuit 41 via the noise suppressing circuit 29 and the crosstalk removing circuit 28, respectively, the mode switching circuit 55 includes four switches. It has a complicated circuit configuration composed of circuits S1 to S4.

The signal processing circuits 51 to 54 and the mode switching circuit 55 are integrated as an IC chip. Generally, filters have a large formation area, and the switch circuits S1 to S4 are formed by the signal processing circuits. Since it is interposed between 51 and 54, it becomes a factor of increasing the size of the IC chip, and consequently hinders miniaturization of the entire device. Further, as described above, when the band is overlapped in the recording mode, the S / N ratio of the recording signal is reduced, and the power consumption is increased.

Therefore, the present invention realizes a circuit configuration in which a filter of the recording signal processing circuit 53 can be omitted and a configuration of the mode switching circuit 55 can be simplified or omitted in the camera-integrated VTR. It was created to solve the problem of.

[0012]

According to a first aspect of the present invention, there is provided a camera system signal processing circuit for performing predetermined signal processing on a signal output from an imaging circuit to output a luminance signal and a color signal, respectively. A recording signal processing circuit for performing signal processing for recording a luminance signal and a color signal obtained from the signal processing circuit on a recording medium; and a demodulation of a reproduction signal read from the recording medium into a reproduction luminance signal and a reproduction color signal. In a camera-integrated VTR provided with a reproduction-system signal processing circuit for performing signal processing for performing a signal processing, a luminance signal output from the imaging circuit and a luminance signal demodulated by the reproduction-system signal processing circuit are switched and output. 1 switch circuit,
The brightness signal output from the first switch circuit is band-limited in the camera signal processing circuit, and the brightness signal after the band limitation is subjected to predetermined signal processing and output from the camera signal processing circuit. A second switch circuit for switching and outputting a luminance signal, a luminance signal output from the second switch circuit, a color signal output from the camera signal processing circuit, or a color signal output from the reproduction signal processing circuit And a video output system circuit that outputs a video signal by mixing the first and second switch circuits in a recording mode in an output state of a luminance signal output by the imaging circuit.
The second switch circuit is switched to an output state of a luminance signal output from the camera system signal processing circuit, and in a reproduction mode, the first switch circuit is set to an output state of a luminance signal output from the reproduction system signal processing circuit. In addition, the present invention relates to a camera-integrated VTR, wherein the second switch circuit is switched to a luminance signal output state in which a luminance signal output from the first switch circuit is band-limited.

According to the present invention, the luminance signal demodulated by the reproduction-system signal processing circuit in the reproduction mode is input to the band-limiting LPF of the camera-system signal processing circuit so that the recording mode and the reproduction mode can share the band-limiting LPF. ing.
Therefore, it is not necessary to provide a band-limiting LPF in the recording-system signal processing circuit, and it is possible to avoid overlapping and band-limiting the luminance signal in the recording mode.

According to a second aspect of the present invention, in the camera-integrated VTR of the first aspect, a band limiting means is provided in a color signal system of the reproduction system signal processing circuit, and a color signal output by the camera system signal processing circuit is provided. A third switch circuit for switching and outputting a color signal output by the reproduction-system signal processing circuit, and setting the third switch circuit to an output state of a color signal output by the camera-system signal processing circuit in a recording mode; In the reproduction mode, the state is switched to the output state of the color signal output from the reproduction-system signal processing circuit,
The present invention relates to a camera-integrated VTR to be input to the video output system circuit.

According to the present invention, by incorporating the band-limiting BPF provided on the color signal side of the recording-system signal processing circuit into the reproduction-system signal processing circuit, the color signals are overlapped and band-limited in the recording mode. If the crosstalk elimination circuit is incorporated in the reproduction-system signal processing circuit, the switching of the color signal system mode can be performed by one switch circuit.

According to a third aspect, in the camera-integrated VTR according to the first aspect, the color signal before band limitation obtained in the camera-system signal processing circuit and the color signal output from the reproduction-system signal processing circuit are converted. A fourth switch circuit for switching and outputting, a color signal output from the camera-system signal processing circuit by performing band limitation on the color signal output from the fourth switch circuit, and a predetermined reproduction signal for the color signal A fifth switch circuit for switching and outputting the processed color signal is provided. In a recording mode, the fourth switch circuit outputs the color signal output before the band limitation obtained in the camera signal processing circuit. The fifth switch circuit is switched to an output state of a color signal output from the camera-system signal processing circuit, and in the reproduction mode, the fourth switch circuit is switched to the output state. The circuit is switched to the output state of the color signal output from the reproduction system signal processing circuit, and the fifth switch circuit is switched to the output state of the color signal subjected to the reproduction signal processing, and input to the video output system circuit. The present invention relates to a camera-integrated VTR.

According to this invention, the color signal of the reproduction system signal processing circuit is not provided with the band-limiting BPF as in the second invention, and the color signal of the reproduction system signal processing circuit is converted to the camera system signal processing circuit in the reproduction mode. , And the BPF can be shared between the recording mode and the reproduction mode. Therefore, in the color signal system, the band-limiting BPF is used.
Can be omitted, and it is possible to avoid overlapping and limiting the band of the color signal in the recording mode, and to simplify the circuit configuration for mode switching.

According to a fourth aspect, in the camera-integrated VTR according to the first aspect, each color difference signal output from the imaging circuit to the camera system signal processing circuit and each color difference signal reproduced by the reproduction system signal processing circuit. And a sixth switch circuit for switching the color signal output from the camera-based signal processing circuit and a color signal obtained by subjecting the color signal to predetermined reproduction signal processing. A seventh switch circuit for outputting the color difference signals output from the imaging circuit in the recording mode, and setting the seventh switch circuit to the camera system signal processing circuit in the recording mode. In the reproduction mode, the output state of each color difference signal reproduced by the reproduction-system signal processing circuit is switched in the reproduction mode. , According to the seventh switch circuit is switched to the output state of the color signal subjected to reproduction signal processing of the camera-integrated VTR has decided to enter into the video output circuits.

This invention corresponds to a modification of the third invention, wherein each color difference signal of the reproduction signal processing circuit is input to a stage prior to the quadrature two-phase modulation processing part of the camera system signal processing circuit. Functions and effects similar to those of the invention are obtained.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a camera-integrated VT of the present invention will be described.
Each embodiment of R will be described in detail with reference to FIGS. 1 to 3 while comparing the circuit configuration of FIG. However, in FIGS. 1 to 3, the circuit elements indicated by the same reference numerals as those in FIG. 4 correspond to the same elements, and correspond to the respective signal processing circuits in FIG. 4 except for the characteristic portions in each embodiment. The same applies to the function of the signal processing circuit described above, and in the following description, description of portions that are not related to the features of each embodiment will be omitted.

<< Embodiment 1 >> A circuit configuration of a camera-integrated VTR according to this embodiment is shown in FIG. 1, and a camera system signal processing circuit 1a and a reproduction system signal processing circuit 2a as in FIG.
The recording system signal processing circuit 3, the video output system circuit 4, and the mode switching circuits (S1, S4) are roughly classified into the following points as compared with the circuit configuration of FIG. (1) A switch circuit S5 is interposed between the image pickup circuit 11 and the LPF 12 in the luminance signal system of the camera signal processing circuit 1a, and the switch circuit S5 is in the recording mode.
Are output to the LPF 12 in the reproduction mode, and the luminance signal output from the reproduction system signal processing circuit 2a in the reproduction mode. (2) The noise suppression circuit 29 is the output side of the LPF 12 and the switch circuit
It is provided between the PB terminal side of S1. (3) B is applied to the output stage of the color signal system of the reproduction system signal processing circuit 2a.
A PF 27 and a crosstalk removing circuit 28 are provided. (4) In the recording system signal processing circuit 53 of FIG. 4, the LPF 31 and the BPF 36 are provided at each input stage of the luminance signal and the color signal, but in the recording system signal processing circuit 3 of this embodiment, they are omitted. . (5) Four switching circuits are used in the mode switching circuit 55 of FIG.
Although the mode switching circuit of this embodiment includes only the switch circuits S1 and S4, each of the switch circuits S1 and S4 reproduces the original camera-system signal obtained from the imaging circuit 11 and the reproduction signal. The signal obtained from the system signal processing circuit 2a is switched between a recording mode and a reproduction mode to output a video output system circuit 4.
Output.

In this embodiment, first, regarding the luminance signal system, the switch circuit S5 is connected to the camera system signal processing circuit 1a.
Is provided, it becomes possible to perform the band limitation by sharing the LPF 12 of the camera system signal processing circuit 1a in the recording mode and the reproduction mode [Feature (1)]. As a result, those corresponding to the LPF 31 provided in the recording system signal processing circuit 53 of FIG. 4 are omitted [Feature (4)], and equivalent to the switch circuit S2 provided in the mode switching circuit 55 in FIG. What to do is omitted [Feature (5)]. In the reproduction mode, the luminance signal of the reproduction-system signal processing circuit 2a is band-limited by the LPF 12 for video output.
4 is provided between the PB terminal side of the switch circuit S1 and the output side of the switch circuit S1 [Feature (2)], noise included in the luminance signal is suppressed as in the circuit configuration of FIG.

In the circuit configuration of FIG. 4, the LPF 31 provided in the recording signal processing circuit 53 is provided in consideration of the case where a luminance signal from the reproduction signal processing circuit 52 is input. , The LPF 12 of the camera signal processing circuit 51
It has the same characteristics as. Therefore, in the recording mode, the camera system signal processing circuit 51 and the recording system signal processing circuit 53 perform the same band limitation on the luminance signal in an overlapping manner. Since it is performed only by the LPF 12 of the system signal processing circuit 1a, it is possible to avoid unnecessary band limitation for the luminance signal, and to perform the same band limitation in the reproduction mode to perform the video output system circuit.
4 can be output. Further, the elimination of the LPF 31 and the switch circuit relating to the luminance signal system has the effect of reducing the circuit scale.

Next, regarding the color signal system, FIG.
B provided in the recording system signal processing circuit 53 with the circuit configuration of
The PF 36 is omitted and the BPF 27 is provided in the reproduction signal processing circuit 2a, and the BPF 27 is used exclusively for band limitation of the reproduction signal [Features (4) and (3)]. As a result, a circuit equivalent to the switch circuit S3 provided in the mode switching circuit 55 in FIG. 4 is also omitted, and the mode switching circuit is replaced with only the switch circuit S4 together with the omission described above.
The color signal of the camera signal processing circuit 1a or the reproduction signal processing circuit 2a output from the switch circuit S4 is directly output to the video output circuit 4.
(Five)].

The BPF 36 is provided in the recording signal processing circuit 53 in the circuit configuration shown in FIG. 4 in consideration of the case where the color signal of the reproduction signal processing circuit 52 is input as in the case of the luminance signal system. However, the BPF 36 and the BPF 20 of the camera signal processing circuit 51 have the same characteristics, and in the recording mode, the camera signal processing circuit 51 and the recording signal processing circuit 53 overlap with the color signal in the recording mode. This means that the band was limited. In this embodiment, the BP provided in the color signal system of the recording system signal processing circuit 53
F36 is incorporated in the reproduction system signal processing circuit 2a as BPF27,
Since the BPF 27 is used exclusively for the band limitation of the reproduced signal, the above-mentioned overlapping band limitation can be avoided. Further, the BPF 36 is omitted from the recording system signal processing circuit 53, and the crosstalk removing circuit 28 is also incorporated in the reproduction system signal processing circuit 2a, so that the switch circuit S3 can be omitted, and the circuit scale can be reduced. I have.

<< Embodiment 2 >> FIG. 2 shows a circuit configuration of a camera-integrated VTR according to this embodiment. FIG. 1 and FIG.
As is clear from the comparison, the luminance signal system has the same configuration as that of the first embodiment, but has a feature in the color signal system, and the reproduction system signal processing circuit 52 in the circuit configuration of the first embodiment.
The encoder 19 outputs between the encoder 19 and the BPF 20 of the camera-system signal processing circuit 1b, except for the BPF 27 and the crosstalk elimination circuit 28 provided in the camera system, and the switch circuit S4 provided in the mode switching circuit. While inserting a switch circuit S6 for switching and outputting a color signal and a color signal output by the reproduction system signal processing circuit 2b,
A switch circuit S for switching between a color signal to be output by the BPF 20 and a color signal after the color signal has been processed by the crosstalk removing circuit 28 and outputting to the video output system circuit 4
Three are provided.

In the first embodiment (FIG. 1), the BPF 36 provided in the color signal system of the recording system signal processing circuit 53 in the prior art (FIG. 4) is incorporated into the reproduction system signal processing circuit 2a as the BPF 27, and the reproduction mode is changed. By causing the reproduction-system signal processing circuit 2a to perform the band limitation of the color signal, the overlapping band limitation is avoided and the mode switching circuit is simplified. However, regarding the color signal system, the camera system signal processing circuit 1a
And a BPF2 having the same characteristics as the reproduction signal processing circuit 2a.
There are 0,27.

In this embodiment, a color signal obtained by quadrature two-phase modulation of each color difference signal of the imaging circuit 11 by the encoder 19 in the recording mode and the reproduction mode by the switch circuit S6 and a color signal obtained from the reproduction system signal processing circuit 2b. By selectively inputting the signals to the BPF 20, the BPF 20 of the camera-system signal processing circuit 1b performs the band limitation in both modes. In the reproduction mode, it is necessary to remove the crosstalk from the color signal after band limitation by the BPF 20 and output the color signal to the video output system circuit 4. Therefore, the output side of the BPF 20 and the video output system circuit 4 are switched by the switch circuit S3. A circuit in which a crosstalk removing circuit 28 is interposed is configured. Accordingly, when looking at the entire circuit of the color signal system, the number of switch circuits is increased by one compared with the case of the first embodiment, which is similar to the circuit configuration of FIG. 4, but since one BPF can be omitted, the overall circuit scale is Can be reduced.

<< Embodiment 3 >> FIG. 3 shows a circuit configuration of a camera-integrated VTR according to this embodiment. This embodiment relates to a modification of the second embodiment and includes a camera signal processing circuit.
Although the circuit configuration of the color signal system in 1c is different from the frequency conversion circuit 26 'of the reproduction system signal processing circuit 2b, other configurations are the same as those in the second embodiment. That is, in the second embodiment (FIG. 2), the switch circuit S6 for mode switching is provided between the color signal encoder 19 and the BPF 20, but in this embodiment, the frequency conversion circuit of the reproduction signal processing circuit 2b is provided. 26 '
To separate and output each color difference signal of the reproduction signal. On the other hand, a switch circuit S7 is provided between the output side of each color difference signal of each gamma correction circuit 15, 16 in the camera signal processing circuit 1c and each LPF 17, 18 corresponding thereto. , S8, and by switching the switch circuits S7, S8, the color difference signals of the gamma correction circuits 15, 16 in the recording mode, and the color difference signals of the reproduction system signal processing circuit 2b in the reproduction mode are converted into camera system signals. The signal is output to the video output system circuit 4 and the recording system signal processing circuit 3 as a color signal subjected to quadrature two-phase modulation and band limitation by the processing circuit 1c.

Therefore, according to this embodiment, the circuit scale of the camera system signal processing circuit 1c is slightly larger by one switch circuit than in the case of Embodiment 2 (FIG. 2). The same effect as 1 and 2 can be obtained,
Further, there is an advantage that the same processing as each color difference signal of the imaging circuit 11 can be performed on each color difference signal separated by the reproduction system signal processing circuit 2b.

[0031]

According to the camera-integrated VTR of the present invention having the above-described structure, the following effects can be obtained. According to the first aspect of the present invention, there is provided a band limiting LP provided in a luminance signal system of a recording signal processing circuit in a conventional circuit configuration.
F can be omitted, the switch circuit of the luminance signal system of the mode switching circuit can be omitted, and simplification can be achieved, and unnecessary band limitation of the luminance signal in the recording mode can be avoided, and the cost can be reduced by reducing the circuit scale. . Also,
Thereby, the S / N ratio can be improved and the power consumption can be reduced. According to a second aspect of the present invention, in addition to the effect of the first aspect, a band-limiting BPF provided in the color signal system of the recording system signal processing circuit in the conventional circuit configuration is provided to the reproduction system signal processing circuit side. This arrangement avoids unnecessary band limitation of the color signal in the recording mode, and reduces the size of the circuit by reducing the number of switch circuits for the luminance signal of the mode switching circuit. According to the third and fourth aspects of the present invention, in addition to the effects of the first aspect of the present invention, the BPF provided in the reproduction-system signal processing circuit according to the second aspect of the present invention is not required, thereby achieving a significant reduction in circuit scale. At the same time, it is possible to improve the S / N ratio and reduce the power consumption of the color signal system. According to the fourth aspect of the present invention, the color difference signal obtained from the reproduction system signal processing circuit in the reproduction mode is subjected to the same signal processing (orthogonal two-phase modulation) by the camera system signal processing circuit as in the recording mode. There is also an advantage that the signal can be output to a recording signal circuit and a video output circuit.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing a circuit configuration according to a first embodiment of a camera-integrated VTR of the present invention.

FIG. 2 is a block circuit diagram illustrating a circuit configuration according to a second embodiment.

FIG. 3 is a block circuit diagram illustrating a circuit configuration according to a third embodiment.

FIG. 4 is a block circuit diagram showing a circuit configuration of a camera-integrated VTR according to the related art.

FIG. 5 is a graph showing a frequency characteristic of an LPF provided in a luminance signal system of a camera signal processing circuit.

FIG. 6 is a graph showing a frequency characteristic of an LPF provided in a color signal system of a camera system signal processing circuit.

FIG. 7 is a graph showing a frequency characteristic of a BPF provided in a color signal system of a camera system signal processing circuit.

[Explanation of symbols]

1a, 1b, 1c, 51: Camera signal processing circuit, 2a, 2b, 52: Reproduction signal processing circuit, 3, 53: Recording signal processing circuit, 4, 54: Video output circuit, 11: Image pickup circuit, 12,17,18,22,31,38…
LPF, 13, 15, 16 ... gamma correction circuit, 14 ... contour emphasis circuit, 19 ... encoder, 20, 27, 36 ... BPF, 21 ... HPF,
23 ... FM demodulation circuit, 24 ... De-emphasis circuit, 25 ... A
CC, 26, 26 ': frequency conversion circuit, 28: crosstalk removal circuit, 29: noise suppression circuit, 32: pre-emphasis circuit,
33: White / dark clip circuit, 35: FM modulation circuit, 37: Low frequency conversion circuit, 39, 41: Y / C mixing circuit, S1, S2,
S3, S4, S5, S6, S7, S8 ... Switch circuit.

Claims (4)

[Claims] 1. A camera-based signal processing circuit that performs predetermined signal processing on a signal output by an imaging circuit to output a luminance signal and a color signal, respectively, and a luminance signal and a color signal obtained from the camera-based signal processing circuit. A recording signal processing circuit for performing signal processing for recording a signal on a recording medium; and a reproduction signal for performing signal processing for demodulating a reproduction signal read from the recording medium into a reproduction luminance signal and a reproduction color signal, respectively. A camera integrated VTR including a processing circuit, a first switch circuit for switching and outputting a luminance signal output by the imaging circuit and a luminance signal demodulated by the reproduction system signal processing circuit; The luminance signal output from the switch circuit is band-limited in the camera-based signal processing circuit, and the luminance signal after the band restriction is subjected to predetermined signal processing to perform the signal processing. A second switch circuit for switching and outputting a luminance signal output from the camera-based signal processing circuit; a luminance signal output from the second switch circuit and a color signal output from the camera-based signal processing circuit or the reproduction system; A video output system circuit that outputs a video signal by mixing a color signal output by a signal processing circuit, and in a recording mode, the first switch circuit is set to an output state of a luminance signal output by the imaging circuit, The second switch circuit is switched to an output state of a luminance signal output from the camera system signal processing circuit, and in a reproduction mode, the first switch circuit is set to an output state of a luminance signal output from the reproduction system signal processing circuit. Wherein the second switch circuit is switched to an output state of a luminance signal in which a luminance signal output from the first switch circuit is band-limited. The camera-integrated VTR. 2. A band limiting means is provided in a color signal system of the reproduction system signal processing circuit, and a color signal output by the camera system signal processing circuit and a color signal output by the reproduction system signal processing circuit are switched. A third switch circuit for outputting is provided, and the third switch circuit is switched to an output state of a color signal output from the camera system signal processing circuit in a recording mode, and is output by the reproduction system signal processing circuit in a reproduction mode. 2. The camera-integrated VTR according to claim 1, wherein the video output circuit is switched to a color signal output state and input to the video output system circuit. 3. A fourth switch circuit for switching and outputting a color signal before band limitation obtained in the camera signal processing circuit and a color signal output by the reproduction signal processing circuit; Fifth, a band is limited to a color signal output from the switch circuit, and a color signal output from the camera signal processing circuit and a color signal obtained by subjecting the color signal to predetermined reproduction signal processing are output by switching.
In the recording mode, the fourth switch circuit is set to an output state of a color signal before band limitation obtained in the camera system signal processing circuit, and the fifth switch circuit is set to the camera system signal processing state. In the reproduction mode, the fourth switch circuit is set to the output state of the color signal output from the reproduction system signal processing circuit, and the fifth switch circuit is set to the reproduction state in the reproduction mode. 2. The camera-integrated VTR according to claim 1, wherein the output state of the color signal subjected to the signal processing is switched to each of the output states and input to the video output system circuit. 4. A sixth circuit which switches between the color difference signals output by the image pickup circuit and the color difference signals reproduced by the reproduction system signal processing circuit to the camera system signal processing circuit and outputs the signal to a subsequent signal processing unit. A switch circuit is provided, and a seventh switch circuit is provided for switching and outputting a color signal output from the camera-based signal processing circuit and a color signal obtained by subjecting the color signal to predetermined reproduction signal processing. The sixth switch circuit is switched to an output state of each color difference signal output by the imaging circuit, and the seventh switch circuit is switched to an output state of a color signal output by the camera system signal processing circuit. The sixth switch circuit is subjected to the reproduction signal processing by the seventh switch circuit to the output state of each color difference signal reproduced by the reproduction system signal processing circuit. 2. The camera-integrated VTR according to claim 1, wherein the VTR is switched to a color signal output state and input to the video output system circuit.