JPH0474087A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To avoid adverse effect on an APC circuit due to a response error and to prevent fluctuation in a hue of a chroma signal by selecting a 2nd path at dubbing and outputting a reproduced chroma signal not through a comb-line filter and the APC circuit. CONSTITUTION:A circuit block belonging to 1st paths 20, 61 is bypassed for both a reproducing device 1 and a recording device 35 at dubbing to select 2nd paths 27, 60 for both the reproducing device 1 and the recording device 35 and a chroma signal is sent through the 2nd paths 27,60. Thus, a chroma signal is obtained in the reproducing device 1 not through a comb-line filter 13 and an APC circuit and further, since the chroma signal is recorded in the recording device 35 not through an emphasis circuit 39, a burst emphasis circuit 41 and the APC circuit, the APC circuit and the AFC circuit are bypassed and the chroma signal is converted into a signal of a prescribed frequency by using a carrier having a prescribed frequency and reproduced and recorded and adverse effect due to a response error of the APC circuit is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording/reproducing apparatus, particularly to a recording/reproducing apparatus suitable for dubbing.

[Summary of the invention]

In the invention of claim (1), the reproduction device includes a burst de-emphasis circuit that attenuates the burst signal level of the reproduced chroma signal, and a frequency conversion circuit that converts the chroma signal that has been low frequency converted into a subcarrier frequency. a first path consisting of a comb filter for crosstalk removal, an APC circuit for controlling the phase of the chroma signal, a reference signal generation circuit for forming a reference signal for frequency conversion, and a low frequency conversion circuit. and a frequency converting circuit that converts the chroma signal that has been recorded into a subcarrier frequency using a reference signal, and the second path can be selected at the time of dubbing. In the device,
A burst emphasis circuit that emphasizes the burst signal level of the chroma signal, an emphasis circuit that emphasizes the level of the chroma signal, a frequency conversion circuit that converts the chroma signal to a low frequency range, and an APC circuit that controls the phase of the chroma signal. 1, a signal generation circuit that outputs a frequency conversion-like reference signal, and one of the reference signal output from the signal generation circuit or the frequency conversion signal formed from the reproduced video signal. a switch circuit to
A second path including a means for controlling the operations of an emphasis circuit, a burst emphasis circuit, and a switch circuit is provided, and the second path can be selected during dubbing, so that the second path can be selected during dubbing. As a result, the reproducing device obtains a chroma signal that does not pass through the comb filter and the APC circuit, and the recording device records the above-mentioned chroma signal without passing through the emphasis circuit and the APC circuit. Eliminates the negative effects of response errors, prevents chroma signal hue fluctuations, and
Dubbing can be performed by bypassing the first path with the comb filter, which prevents color shift in the vertical direction, and improving color reproducibility by bypassing the first path with the emphasis circuit. In addition, it is possible to prevent changes in color level due to deterioration of chroma signal linearity during dubbing, and to prevent deterioration in image quality during dubbing.

[Conventional technology]

2. Description of the Related Art Conventionally, so-called dubbing has been performed in which a video signal reproduced by a video tape recorder on the playback side is supplied to a video tape recorder on the recording side for recording.

[Problem to be solved by the invention]

By the way, the signal processing of video signals is performed in the same way whether during dubbing or during normal times other than dubbing, and in many cases, no special measures are taken for dubbing. In such a case, the following problems occur.

Within the vertical blanking period, there is a period in which there is no burst signal, and the response error in the APC circuit from the start of the burst cannot be absorbed within the vertical blanking period. Therefore, the above-mentioned response error occurs. , z0 (UE) fluctuations in the chroma signal may occur at the top of the monitor screen, and there is a problem in that this phenomenon tends to be exacerbated by dubbing.

Further, although PI processing is performed to cancel crosstalk between tracks, there is a problem in that vertical color shift occurs due to this, and this phenomenon tends to be added up by dubbing.

The linearity deterioration of the chroma signal due to emphasis is
There is a problem in that changes in color levels are added due to dubbing.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a recording/reproducing apparatus equipped with a signal processing path for dubbing.

[Means to solve the problem]

The playback device according to the invention of claim (1) is a playback device that plays back a video signal, converts a chroma signal that has been low-frequency converted to a subcarrier frequency, and outputs the converted chroma signal. a burst de-emphasis circuit that attenuates the level; a frequency conversion circuit that converts the low frequency converted chroma signal to a subcarrier frequency;
A first path consisting of a comb filter for crosstalk removal, an APC circuit that controls the phase of the chroma signal, a reference signal generation circuit that forms a reference signal for frequency conversion, and a chroma signal that is low-frequency converted. The second path includes a frequency conversion circuit that converts a chroma signal into a subcarrier frequency using a reference signal, and the second path can be selected during dubbing.

The recording device according to the invention of claim (2) is a recording device that converts a chroma signal of a video signal into a low frequency band and records the video signal, and includes a burst emphasis circuit that emphasizes the burst signal level of the chroma signal; an emphasis circuit that emphasizes the level of
a first path consisting of a PC circuit, a signal generation circuit that outputs a frequency conversion-like reference signal, and a frequency conversion signal formed from the reference signal output from the signal generation circuit or the reproduced video signal. The second path includes a switch circuit for selecting one of the two, and a means for controlling the operations of the emphasis circuit, the burst emphasis circuit, and the switch circuit, and is configured to be able to select the second path during dubbing. .

[Effect]

In the reproducing apparatus according to the invention of claim (1), by selecting the second path during dubbing, the reproduced chroma signal is output without passing through the comb filter and the APC circuit.

In the recording apparatus according to the invention of claim (2), by selecting the second path during dubbing, the reproduced chroma signal is recorded without passing through the emphasis circuit, the burst emphasis circuit, and the APC circuit.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In this embodiment, an 8m+ video tape recorder is used as an example. A description of this embodiment will be given in the following order.

(1) Regarding the reproducing system (2) Regarding the recording system (1) Regarding the reproducing system FIG. 1 shows a block diagram of a reproducing apparatus 1 according to the present invention.

In the configuration shown in FIG. 1, the RF signal SRF reproduced from the magnetic tape 3 by the magnetic head 2 is supplied to a bandpass filter 5 via an amplifier 4, and a brightness signal (not shown) is sent via a terminal 7. Supplied to the processing system.

The bandpass filter 5 obtains a chroma signal CO that has been low-pass converted to (743 KHz), and this chroma signal CO
is supplied to the ACC circuit 6.

The ACC circuit 6 controls the level of the chroma signal CO to a predetermined amplitude level and supplies it to the delay circuit 21 and the burst de-emphasis circuit 8.

In the burst de-emphasis circuit 8, the chroma signal CO
is attenuated. In other words, since the chroma signal CO is emphasized at a predetermined level, for example (+6 dB), during recording, the chroma signal CO is emphasized at a predetermined level (+6 dB) corresponding to the amount of emphasis during playback.
-6dB), and is attenuated back to the specified level. The attenuated chroma signal CO is supplied to a frequency conversion circuit 9.

The frequency conversion circuit 9 receives the above-mentioned low-frequency converted chroma signal CO from the frequency conversion circuit 19 via the carrier invert circuit 10, and converts the frequency to (4,32 MH).
z) with the signal 5T19 to form an output signal, which is supplied to the bandpass filter 11.

The video signal is processed using PI (Phas) to remove crosstalk.
e Invert) method, the carrier invert circuit 10 converts the signal 5T19 into a corresponding signal for every IH of the chroma signal reproduced in one channel, for example, if the magnetic head has two channels. Control is performed to invert the phase of 5T19. Since the signal 5T19 is supplied to the frequency conversion circuit 9, the phase of the chroma signal component and crosstalk component of the output signal from the frequency conversion circuit 9 is inverted every IH. As a result, the phases of the crosstalk components in all H are made to be in phase, and the continuity of the chroma signal is maintained.

The band pass filter 11 converts the output signal from the frequency conversion circuit 9 into frequencies around (3,58 MHz), that is, (3,58 MHz±500 KHz).
) is obtained, and this chroma signal C1 is obtained.
I is supplied to the de-emphasis circuit 12.

The de-emphasis circuit 12 applies de-emphasis to the sideband wave according to the level of the chroma signal CI, attenuates it to a predetermined level, and supplies it to the comb filter 13 .

In the comb filter 13, the pre-IH chroma signal C1 and the current H chroma signal C1 are combined, so that
The components of the chroma signal C1 are obtained, and crosstalk components from adjacent tracks are removed. The chroma signal C1 from which crosstalk has been removed is taken out as the chroma signal C1 from the terminal 14, and the burst signal of this chroma signal C1 is sent to the APC detection circuit 15 and the ACC.
The signal is supplied to the detection circuit 16.

In the APC detection circuit 15, the frequency (3, 5
8MHz) and (8MHz) supplied from the reference signal generation circuit 17.
A phase comparison is made with a reference signal 5T17 (3.58 MHz), and the phase error ERI is supplied to VColB as a control voltage.

In the VC018, a signal with a frequency corresponding to the above-mentioned phase error ERI is supplied to the frequency conversion circuit 19.

In the frequency conversion circuit 19, the reference signal 5T17 (3.58 MHz) supplied from the reference signal generation circuit 17,
Multiplication with the signal supplied from VColB is performed, and (4
, 32 MHz) is formed, and this signal 5T19 is supplied to the carrier invert circuit 10.

As described above, in the carrier invert circuit 10, for example, if the magnetic head has two channels, control is performed to invert the phase of the corresponding signal 5T19 every IH of the chroma signal C1 reproduced in one channel. ing. This signal 5T19 is supplied to the frequency conversion circuit 9, and frequency conversion is performed as described above.

In this way, the signal 5TI9 whose frequency is (4, 32 MHz) is formed by phase comparison between the reference signal 5T17 supplied from the reference signal generation circuit 17 and the burst signal of the chroma signal C1. The signal C1 is a signal whose phase is locked to the reference signal 5T17.

The ACC detection circuit 16 detects the envelope level of the chroma signal CI, and supplies a gain control signal to the ACC circuit 6 to control the gain of the ACC circuit 6 based on this envelope level.

A path from the burst de-emphasis circuit 8 described above, via the frequency conversion circuit 9, the de-emphasis circuit 12 and the band-pass filter 11, to the comb filter 13, and from the comb filter 13, an APC detection circuit 15,
A first path 20 is constituted by a path from the reference signal generation circuit 17 and VColB to the frequency conversion circuit 9 via the frequency conversion circuit 19.

Further, the above-mentioned ACC circuit 6 is connected to a frequency conversion circuit 22 via a delay circuit 21 for time adjustment of signal processing.

In the reference signal generation circuit 23, a reference signal 5T23 having a frequency of (4,32MB2) is generated by, for example, a crystal oscillator, and this reference signal 5T23 is supplied to the carrier invert circuit 24.

As mentioned above, in the carrier invert circuit 24, for example, if the magnetic head has two channels, every IH of the chroma signal reproduced in one channel,
Control is performed to invert the phase of the corresponding reference signal 5T23. This reference signal 5T23 is applied to the frequency conversion circuit 22.
supplied to

The frequency conversion circuit 22 is supplied with the above-mentioned low frequency converted chroma signal CO from the reference signal generation circuit 23 via the carrier invert circuit 24 and has a frequency of (4, 32
The output signal is multiplied by a reference signal 5T23 (MHz) to form an output signal, which is supplied to the bandpass filter 25.

As mentioned above, the video signal is recorded using the PI method in order to eliminate crosstalk, so the carrier invert circuit 24 uses the reference signal 5T23 for example if the magnetic head has two channels. Control is performed to invert the phase of the corresponding reference signal 5T23 every IH of the reproduced chroma signal. Since this reference signal 5T23 is supplied to the frequency conversion circuit 22, the phase of the chroma signal component and crosstalk component of the output signal from the frequency conversion circuit 22 is inverted every IH. As a result, the phases of the crosstalk components in all H are made to be in phase, and the continuity of the chroma signal is ensured.

The band pass filter 25 converts the output signal from the frequency conversion circuit 22 into frequencies around (3,58 MHz), that is, (3,58 MHz ± 500 KHz).
) is obtained, and this chroma signal C2 is obtained.
2 is taken out from the terminal 26.

A second path 27 is a path from the delay circuit 21 described above, via the frequency conversion circuit 22, the reference signal generation circuit 23, and the carrier invert circuit 24, to the bandpass filter 25 and the terminal 26, surrounded by a broken line.

(2) Recording System FIG. 2 shows a block diagram of a recording apparatus 35 according to the present invention.

In the configuration shown in FIG. 2, the chroma signal C1 supplied from the first path 20 on the playback device 1 side is supplied to the terminal 37a of the switch circuit 37 via the terminal 36, and
The chroma signal C2 supplied from the second path 27 on the playback device 1 side is supplied to the terminal 37b of the switch circuit 37 via the terminal 63. The signal that has passed through the above-mentioned switch circuit 37 is supplied to an ACC circuit 38.

The ACC circuit 38 controls the level of the chroma signal C selected from the chroma signals C1 and C2 to a predetermined amplitude level, and supplies the signal to the emphasis circuit 39 and the detection circuit 40.

The emphasis circuit 39 applies emphasis to the sideband wave according to the level of the chroma signal C, emphasizing it to a predetermined level, and supplies the sideband wave to a burst emphasis circuit 41 .

The burst emphasis circuit 41 emphasizes the chroma signal C. That is, the chroma signal C is emphasized at a predetermined level, for example (+6 dB), during recording. The emphasized chroma signal C is sent to the frequency conversion circuit 4.
2.

In the detection circuit 40, the phase of the above-mentioned chroma signal C is compared with the (3.58 MHz) signal 5T43 supplied from the crystal oscillation circuit 43, a phase error ER2 is formed, and the signal is supplied to the crystal oscillation circuit 43. Ru.

The crystal oscillation circuit 43 changes the oscillation frequency of the signal based on the above-mentioned phase error ER2.

This signal 5T43 is fed back to the detection circuit 40 as described above, and is also supplied to the frequency conversion circuit 44. This signal 5T43 is locked to the burst signal of the chroma signal C.

Further, the luminance signal Y supplied from the terminal 45 is supplied to the synchronization signal separation circuit 46.

The synchronization signal separation circuit 46 separates the horizontal synchronization signal from the luminance signal Y and supplies it to the AFC detection circuit 47 .

” The AFC detection circuit 47, VC048, and frequency dividing circuit 49 constitute an AFC loop.

The AFC detection circuit 47 receives the above-mentioned horizontal synchronization signal and the VC
A comparison is made with a signal of horizontal scanning frequency fH supplied from VC04B via the frequency dividing circuit 49, and a voltage output proportional to the frequency error is supplied to VC04B.

In VC04B, the oscillation frequency of signal 5T4B is controlled by a voltage output proportional to the frequency error mentioned above, and signal 574B whose frequency is, for example, (47, 25f H = 743 KHz) is sent to frequency divider circuit 49 and frequency converter. The signal is supplied to circuit 44. This signal 5T48 is AFC-locked to the luminance signal Y.

In the frequency dividing circuit 49, the frequency of the above-mentioned signal 574B is divided by a predetermined frequency division ratio to form a signal substantially equal to the horizontal scanning frequency fH, and this signal is returned to the AFC detection circuit 47.

The frequency conversion circuit 44 is locked to the burst signal supplied from the crystal oscillation circuit 43 (3.58
MHz) signal 5T43 and the luminance signal Y supplied from VC04B (47.25f F
As a result of multiplication with the signal 5T48 having a frequency of (4.32 MHz), a signal 5T44 having a frequency of (4.32 MHz) is formed and supplied to the switch circuit 50.

On the other hand, from the reference signal generation circuit 51, (4, 32MHz
) is supplied to the switch circuit 50.

In the switch circuit 50, one of the signal 5T44 and the reference signal 5T51 is selected as the signal 5T50 based on a control signal Sc to be described later, and the carrier invert circuit 5
2.

Similar to the carrier invert circuit 10.24 in the reproduction system, the carrier invert circuit 52, for example, when a magnetic head has two channels, sets a corresponding standard for every IH of the chroma signal reproduced in one channel. Control is performed to invert the phase of signal 5T50. This reference signal 5T50 is supplied to the frequency conversion circuit 42.

In the frequency conversion circuit 42, a carrier invert circuit 52
A signal 5 with a frequency of (4.32 MHz) supplied from
Multiplication is performed by T50 and a signal 5T41 having a frequency of (L58 MHz) supplied from the burst emphasis circuit 41 to form an output signal and supplied to the bandpass filter 53.

The band pass filter 53 converts the output signal from the frequency conversion circuit 42 into frequencies around 743 K11z, that is, (743 Ktlz±500 KHz).
), the AFC-locked chroma signal C3 is output and supplied to the adder circuit 54.

In the adder circuit 54, the FM-modulated luminance signal Y supplied via the terminal 55 and the above-mentioned chroma signal C3 are added to form an RF signal SRF for recording.

This RF signal Sl? F is recorded on the magnetic tape 58 by the magnetic head 57 via the amplifier 56.

In FIG. 2, the parts surrounded by broken lines such as the control signal line 59, the switch circuit 50, the reference signal generation circuit 51, etc.
A second route 60 is configured, and a first route 61 is configured in a portion not surrounded by a broken line.

When the control signal Sc is supplied via the terminal 62 by the control signal line 59 described above, the terminals 37b and 37c are connected in the switch circuit 37, and the chroma signal from the second path 27 on the recycled bag fl side is connected. In addition, the emphasis circuit 39 and the burst emphasis circuit 41 output the input chroma signal C2 as is without being processed, and the switch circuit 50 outputs the input chroma signal C2 as it is, and the switch circuit 50 selects the reference signal generation circuit 51. The reference signal 5T51 having a frequency of (4.32 MHz) outputted from the reference signal 5T51 is selected.

Next, the second path 27 of the playback device l and the recording device 3
The circuit operation during dubbing performed using the second path 60 of No. 5 will be described.

The RF signal SI? reproduced from the magnetic tape 3 by the magnetic head 2 of the reproduction device 1? F is supplied to a bandpass filter 5 via an amplifier 4, and the bandpass filter 5 extracts a chroma signal CO.

The second chroma signal CO is controlled by the ACC circuit 6 to have a predetermined amplitude level, and is supplied to the frequency conversion circuit 22 via the delay circuit 21.

In the frequency conversion circuit 22, the reproduced low frequency converted chroma signal CO is multiplied by the (4.32 MHz) reference signal 5T23 supplied from the reference signal generation circuit 23, and the bandpass filter 25 is The chroma signal C of (3,58 MHz ± 500 KHz)
2 is reproduced and supplied via terminal 26 to terminal 63 of example recording device i'35.

During this dubbing, in the recording device 35, a control signal Sc supplied from a system controller (not shown) via a terminal 62 is transmitted to the switch circuit 37 via a control signal line 59.
, emphasis circuit 39, burst emphasis circuit 4
1. It is supplied to the switch circuit 50 and the like.

When the above-mentioned control signal Sc is supplied, the switch circuit 37
Then, the terminals 37b and 37c are connected, and control is performed to select the chroma signal C2 from the second path 27 on the re-main device 1 side. The chroma signal C2 is output as it is without any processing, and at the switch i50, the reference signal 5T51 having a frequency of (4.32 MHz) output from the reference signal generation circuit 51 is selected. It is done like this.

Therefore, the chroma signal C2 supplied via the terminal 36 is supplied to the frequency conversion circuit 42 via the switch circuit 37, the ACC circuit IMrS8, the emphasis circuit 39, and the burst emphasis circuit 41.

In the frequency conversion circuit 42, the reference signal 5T51 of (4.32 M[lz) supplied from the reference signal generation circuit 51 and the above-mentioned chroma signal C2 are multiplied, and the frequency of the above-mentioned chroma signal C2 and the reference signal are multiplied. An output signal having a frequency that is the sum and difference of the frequency of 5T51 is formed and supplied to the bandpass filter 53.

The band pass filter 53 selects (7
43KHz±500K)lz)
v signal C3 is obtained, and this chroma signal C3 is sent to the adder circuit 5.
4.

The adder circuit 54 adds the FM-modulated frequency signal Y supplied via the terminal 55 and the above-mentioned chroma signal C3 to form an RF signal SRF for recording. This RF
The signal SRF is recorded on a magnetic tape 58 by a magnetic head 57 via an amplifier 56.

In this way, when dubbing in which both the playback device 1 and the recording device 35 select the second path 27.60, the playback device 1,
In both the recording device 35, the circuit blocks belonging to the above-mentioned first path 20.61 are bypassed and the chroma signal is transmitted on the second path 27.60.

As a result, in the regenerator 1, the comb filter 13,
A chroma signal that does not pass through the APC circuit is obtained, and in the recording device 35, the above-mentioned chroma signal is passed through the emphasis circuit 3.
9. Since it is recorded without passing through the burst emphasis circuit 41 and the APC circuit, the APC circuit and AFC circuit can be bypassed and the chroma signal can be converted to a predetermined frequency using a carrier of a predetermined frequency for playback and recording. This eliminates the negative effects caused by response errors, prevents hue fluctuations in the chroma signal, and allows dubbing to be performed by bypassing the first path with the comb filter, which prevents color shift in the vertical direction and improves the emphasis circuit. Since dubbing can be performed while bypassing a certain first path, color reproducibility can be improved and changes in color level due to linearity deterioration of chroma signals during dubbing can be prevented.

Therefore, image quality deterioration during dubbing can be prevented.

Furthermore, by adding the frequency conversion circuit 22 to the playback device 1, accumulation of APC response errors is prevented and normal color lock can be obtained.

Since a frequency conversion circuit 22 is added to the reproduction device 1 and carrier inversion processing is performed based on the input signal in the frequency conversion circuit 22, phase continuity of the chroma signal can be maintained during dubbing.

According to this embodiment, the second path 60 of the recording device 35
is set as shown by the broken line in FIG. 2, but it is not limited to this. For example, the reference signal generation circuit 51 and a new frequency conversion circuit are independently provided, and the chroma signal C2 is supplied to the newly installed frequency conversion circuit (
A reference signal of 4.32 MHz) may be generated.

Furthermore, although this embodiment is explained using an 8m video tape recorder as an example, the present invention is not limited to this, and of course can be applied to other video tape recorders.

〔Effect of the invention〕

In the playback device according to the present invention, by selecting the second path during dubbing, a chroma signal that does not pass through the comb filter and APC circuit can be obtained, and in the recording device,
Since the above-mentioned chroma signal is recorded without passing through the emphasis circuit and the APC circuit, it is possible to eliminate the negative effects caused by response errors in the APC circuit, and to prevent hue fluctuations in the chroma signal. Since dubbing can be performed by bypassing a certain first path, color shift in the vertical direction can be prevented, and since dubbing can be performed by bypassing a certain first path, which has an emphasis circuit, color reproducibility can be improved. This also has the effect of preventing changes in color level due to deterioration of chroma signal linearity during dubbing.

The above-mentioned effect has the effect of preventing image quality deterioration during dubbing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a reciprocating system according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a recording system according to an embodiment. Explanation of main symbols in the drawings 1: Reproduction device, 8: Burst de-emphasis circuit, 9.19.22.42.44: Frequency conversion circuit, 11:
Bandpass filter, 13:<L-shaped filter, 15: APC detection circuit, 18: VCOl 20.61: First path, 23.51: Reference signal generation circuit, 27.60: Second path, 35: Recording device, 41: burst emphasis circuit, 43: crystal oscillation circuit, 50: switch circuit, 59: control signal line, C, C05CL C2, C3: chroma signal, Sc: control signal, 5T51: reference signal, 5T44: signal.

Claims (2)

[Claims] (1) A burst de-emphasis circuit that attenuates the burst signal level of the reproduced chroma signal in a reproduction device that reproduces a video signal, converts the low-frequency converted chroma signal to a subcarrier frequency, and outputs the subcarrier frequency; A first path consisting of a frequency conversion circuit that converts the low frequency converted chroma signal to a subcarrier frequency, a comb filter for crosstalk removal, and an APC circuit that controls the phase of the chroma signal; A second path includes a reference signal generation circuit that forms a reference signal for conversion, and a frequency conversion circuit that converts the low frequency converted chroma signal to a subcarrier frequency using the reference signal, and when dubbing, A playback device that is capable of selecting the second route. (2) In a recording device that converts a chroma signal of a video signal to low frequency and records the video signal, a burst emphasis circuit that emphasizes the burst signal level of the chroma signal; and an emphasis circuit that emphasizes the level of the chroma signal. , a frequency conversion circuit that converts the chroma signal to low frequency, and an AP that controls the phase of the chroma signal.
a first path consisting of a C circuit, a signal generating circuit that outputs a reference signal for frequency conversion, and a signal generating circuit for frequency conversion formed from the reference signal output from the signal generating circuit or the reproduced video signal. a second path comprising a switch circuit for selecting one of the signals, and means for controlling the operations of the emphasis circuit, the burst emphasis circuit, and the switch circuit; the second path is selected during dubbing. A recording device characterized by being able to.