JPH11205730A - Device and method for video signal recording and reproducing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect an automatic track finding ATE pilot signal accurately in response to the tape recording system or drive speed. SOLUTION: The video signal recording and reproducing device is provided with a mechanical deck program 1 that records a video signal on a recording medium together with a recording track guide signal or reproduces the video signal, an ATF pilot signal detection block 15 that detects a frequency of the reproduced recording track guide signal, and an MCU 20 that controls the detection of the frequency of the ATF pilot signal detection block 15 and controls a reference signal of the a ATF pilot signal detection block 15 or the drive state of the recording meiudm in the mechanical detected block 1. Thus, the recording track guide signal is always detected accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a video signal recording / reproducing apparatus and a video signal recording / reproducing method for reproducing a video signal recorded on a recording medium.

[0002]

2. Description of the Related Art Conventionally, a camera-integrated 8 mm video tape recorder (hereinafter, referred to as a camera-integrated 8 mm VTR) is composed of a camera unit and a VTR unit, and an image of a subject captured by the camera unit. Is converted into an electric signal, and is subjected to predetermined signal processing by a VTR unit, and then magnetically recorded on a magnetic tape.

A video signal recorded on a magnetic tape in a VTR section is reproduced and supplied to a monitor to display an image of the video signal.

Here, in the VTR section, an ATF (Automated Recording) is performed during recording so that a track on which a magnetic recording signal is recorded can be traced without being depressed by a video head during reproduction.
Atomic Track Finding) was recorded.

[0005]

However, in the above-mentioned conventional camera-integrated 8-mm VTR, when such an ATF pilot signal is detected during reproduction, the fixed frequency generated by the crystal is divided. Thus, a technique has been used in which a reference frequency is created, and the reference frequency is multiplied by a reproduced RF signal and filtered to extract a crosstalk component of an adjacent track.

In this case, since the generated reference frequency is fixed, for example, when a tape recorded in the NTSC system is to be simply reproduced in an apparatus shipped to a destination to which the PAL system is applied, the NTSC system is used. Since the frequency of the ATF pilot signal differs depending on the / PAL system, accurate detection of the ATF pilot signal is not performed at the time of reproduction, and there is a disadvantage that stable tracking control may be hindered.

In a state where the tape speed such as FF (fast forward) / REW (rewind) is different from the normal reproduction speed, when extracting the ATF pilot signal, the rotation of the video head mounted in accordance with the tape speed is performed. If the rotation speed of the drum is not corrected, the frequency spectrum of the reproduced signal shifts, and the ATF pilot signal shifts. As a result, accurate detection is not performed. There was a disadvantage that it could not be applied.

The present invention has been made in view of the above points, and a video signal recording / reproducing apparatus and a video signal recording apparatus capable of accurately detecting an ATF pilot signal according to a tape recording system or a tape running speed. It is intended to propose a reproduction method.

[0009]

According to the present invention, there is provided a video signal recording / reproducing apparatus for recording a video signal together with a recording track guide signal on a recording medium, and a video signal recorded on the recording medium. Reproducing means for reproducing the reproduced video signal together with the recording track guide signal, detecting means for detecting the frequency of the recording track guide signal reproduced by the reproducing means, and a recording system for the video signal reproduced by the reproducing means. Or controlling the detection of the frequency of the detecting means according to the running state of the recording medium by the reproducing means, and controlling the reference signal of the detecting means or controlling the recording medium by the reproducing means according to the recording method. And control means for controlling the running state of the vehicle.

The video signal recording / reproducing method according to the present invention includes a recording step of recording a video signal on a recording medium together with a recording track guide signal, and a step of recording the video signal recorded on the recording medium together with the recording track guide signal. A reproducing step of reproducing, a detecting step of detecting a frequency of the recording track guide signal reproduced in the reproducing step, and a detecting method of the video signal reproduced in the reproducing step, Detecting the running state of the recording medium, controlling the detection of the frequency of the detecting step according to the recording method of the video signal or the running state of the recording medium, and the reference signal of the detecting step according to the recording method. Or a control step of controlling the running state of the recording medium by the reproduction step. It is intended.

According to the video signal recording / reproducing apparatus of the present invention,
It works as follows. The recording means operates to record the video signal on the recording medium together with the recording track guide signal.
The reproducing means operates to reproduce the video signal recorded on the recording medium together with the recording track guide signal.
The detecting means operates to detect the frequency of the recording track guide signal reproduced by the reproducing means. The control means controls the detection of the frequency of the detection means according to the recording method of the video signal reproduced by the reproduction means or the running state of the recording medium by the reproduction means, and performs the control according to the recording method. It acts to control the reference signal of the detecting means or to control the running state of the recording medium by the reproducing means.

According to the video signal recording / reproducing method of the present invention,
It works as follows. The recording step acts to record the video signal on the recording medium together with the recording track guide signal. The reproducing step operates to reproduce the video signal recorded on the recording medium together with the recording track guide signal. The detecting step operates to detect the frequency of the recording track guide signal reproduced in the reproducing step. The control step detects a recording mode of the video signal reproduced in the reproduction step, and then detects a traveling state of the recording medium in the reproduction step, and according to the recording mode of the video signal or the traveling state of the recording medium, In addition to controlling the detection of the frequency in the detection step, the reference signal in the detection step or the running state of the recording medium in the reproduction step is controlled in accordance with the recording method.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. The video signal recording / reproducing apparatus of the present embodiment automatically tracks a magnetic recording signal during reproduction in order to automatically perform tracking during reproduction of a video signal recorded by a camera-integrated 8 mm VTR. ATF (Automatic Track) during recording so that the head can trace without stepping off
This is applied to the detection of an ATF pilot signal for detecting a pilot signal recorded by the (Finding) method.

FIG. 1 is a block diagram showing a configuration of a video signal recording / reproducing apparatus according to an embodiment of the present invention. That is, the camera-integrated 8-mm VTR to which the video signal recording / reproducing apparatus is applied is configured by a camera unit and a VTR unit (not shown), and the image of the subject captured by the camera unit is converted into an electric signal, and the VTR unit After being subjected to a predetermined signal processing, it is magnetically recorded on a magnetic tape together with an ATF pilot signal.

The video signal recording / reproducing apparatus according to the present embodiment
A video signal is recorded by forming a helical track on a tape, and the helical track is scanned (scanned).
And a mechanical deck block 1 including a rotary drive system of a video head for reproducing a video signal and a rotary drive system of a capstan for running a tape, and a reproduction amplifier 2 for amplifying a video signal reproduced by the video head 2 at a high frequency.
And an analog / digital converter (A / D converter) for converting an analog video signal reproduced by the reproduction amplifier 2 into digital video data in order to facilitate subsequent signal processing, and an output from the A / D converter. And a digital / analog converter (D) that converts the digital video data to be processed into a video signal based on a control signal. / A converter).

The video signal recording / reproducing apparatus according to the present embodiment uses the AT of the reproduced RF signal PBRF of the reproducing amplifier 2.
LPF4 for extracting low frequency components including F pilot signals f1, f2, f3 and f4, and ATF pilot signal f from the frequency components extracted by LPF4.
ATF pilot signal detection block 15 for detecting the ATF pilot signals f1, f3, f4
Four are provided corresponding to f2, f3 and f4, but here only the f1 is shown. ), The horizontal synchronization signal Hsync from the video / audio signal processing unit 3, the ATF pilot signal from the ATF pilot signal detection block 15, and the capstan FG from the mechanical deck block 1 to switch the reference signal to the ATF pilot signal detection block 15. An MCU (Micro Control) for supplying a control signal and a detection frequency control signal and supplying a capstan servo output to the mechanical deck block 1
erUnit) 20.

Here, the ATF pilot signal detection block 15 includes an A / D converter 5 for converting the analog video signal of the frequency component extracted by the LPF 4 into digital video data in order to facilitate subsequent signal processing. , A
A multiplier 6 for multiplying the digital video data output from the / D converter 5 by a control signal to be described later, an LPF 7 for extracting a low frequency component of the output of the multiplier 6, and an ATF for detecting the level of the output of the LPF 7 to detect the ATF A level detector 8 for outputting a level signal f1level of the pilot signal f1;
Angular velocity data (△ ω1N) to be the reference signal of the TSC system
9 and angular velocity data (△ ω
1P) 10, one of angular velocity data (△ ω1N) 9 and one of angular velocity data (△ ω1P) 10 for switching and outputting, an output of selector 11 and MCU 20
, A multiplier that integrates the output of the multiplier 12, and a sine curve corresponding to the phase, which is the output of the integrator 13, to be supplied to the multiplier 6. And a SINROM 14.

The MCU 20 includes a capstan speed detecting circuit 16 for detecting the speed of the capstan from the capstan FG from the mechanical deck block 1 and a detection frequency control corresponding to the capstan speed from the capstan speed detecting circuit 16. A detection frequency control circuit 17 that supplies a control value to the multiplier 12 of the ATF pilot detection block 15 so as to perform the above operation, and a capstan is sent to the mechanical deck block 1 based on the level signal f1level of the ATF pilot signal f1 from the ATF pilot detection block 15. A capstan servo circuit 18 for supplying a servo output, and a PAL system or an NTSC system of a video signal are determined based on the horizontal synchronizing signal Hsync or the like from the video / audio signal processing unit 3 and the ATF is determined based on the determination result.
A PAL / NTSC detection circuit 19 for controlling switching of the selector 11 of the detection block 15 is provided.

The video signal recording / reproducing apparatus according to the present embodiment configured as described above operates as follows. That is, in a camera-integrated 8 mm VTR to which the video signal recording / reproducing apparatus is applied, after a video of a subject captured by a camera unit (not shown) is converted into an electric signal and subjected to predetermined signal processing by the VTR unit, AT on magnetic tape
It is magnetically recorded together with the F pilot signal.

Hereinafter, the reproducing operation will be described. When the user presses a play button (not shown), an input instruction is issued to the microcomputer of the control unit (not shown) to generate a command for a playback operation for the drum of the video head of the mechanical deck block 1 and the capstan (not shown). The microcomputer detects an input instruction by the play button and applies servo to the video head so as to control the servo system of the video head. Specifically, a drum servo for controlling the rotation of the video head and a capstan servo for controlling the running of the tape in a state where the tape is wound around the video head over a predetermined angle with respect to the video head are used.

When the servo is stabilized, the video head converts each magnetic recording signal obtained by scanning each helical track into an electric signal. In this manner, the video signal is reproduced by the video head sequentially scanning the helical track. A reproduction signal of a minute level obtained from a video head of the mechanical deck block 1 is supplied to a reproduction amplifier 2 and amplified to a level at which a signal can be processed at a subsequent stage. The video signal amplified by the reproduction amplifier 2 is supplied to an A / D converter of the video / audio signal processing unit 3, and the reproduced analog video signal is converted into digital video data to facilitate subsequent signal processing. Is done.

A / D of video / audio signal processing unit 3
The digital video data output from the converter is supplied to a signal processing block. The digital video data is subjected to signal processing for video reproduction based on a control signal supplied from a microcomputer by a signal processing block. Specifically, the signal processing block separates the luminance signal from the digital data, generates a luminance signal and a color difference signal, and writes or reads the luminance signal and the color difference signal to or from the field memory by the write processing unit. To perform a predetermined demodulation.

The digital data subjected to signal processing by the signal processing block of the video / audio signal processing section 3 is converted into an analog video signal by a D / A converter. D
An analog video signal is supplied to the terminal 21 from the / A converter. In this way, the image of the video signal is displayed on the monitor connected from the terminal 21 via a cable (not shown) or the like.

Next, the ATF pilot detection block 15
The operation of the MCU 20 will be described. The reproduction RF signal PBRF of the reproduction amplifier 2 is supplied to the LPF 4 and
Low frequency components including the F pilot signals f1, f2, f3, f4 are extracted. The frequency component extracted by the LPF 4 is supplied to the A / D converter 5 of the ATF pilot signal detection block 15. Generally, ATF pilot signals f1 and f are extracted from the frequency components extracted from LPF 4 by ATF pilot signal detection block 15.
2, f3, and f4 are detected (four ATF pilot signal detection blocks 15 operate in correspondence with the respective ATF pilot signals f1, f2, f3, and f4, but only the one for f1 is shown here). The MCU 20 generally controls the horizontal synchronization signal Hsy from the video / audio signal processing unit 3.
nc and A from the ATF pilot signal detection block 15.
A reference signal switching control signal and a detection frequency control signal for the ATF pilot signal detection block 15 are generated and supplied from the TF pilot signal and the capstan FG from the mechanical deck block 1, and a capstan servo output is supplied to the mechanical deck block 1. Is done.

More specifically, the ATF pilot signal detection block 15 operates as follows. LP
The analog video signal of the frequency component extracted by F4 is supplied to the A / D converter 5, where it is converted into digital video data by the A / D converter 5 in order to facilitate the subsequent signal processing. Specifically, an analog video signal is converted into digital video data at a sampling rate fs. The digital video data output from the A / D converter 5 and a control signal described later are supplied to the multiplier 6 and multiplied by the multiplier 6. The output of the multiplier 6 is supplied to the LPF 7, and a low frequency component is extracted by the LPF 7, whereby a DC component is extracted. The output level of the LPF 7 is supplied to a level detector 8, and the signal level is detected by the level detector 8, and the ATF pilot signal f1
Is output as the level signal f1level.

On the other hand, angular velocity data (△ ω1N = 2π · f1N / fs) 9 serving as a reference signal of the NTSC system and PA
Angular velocity data (△ ω1P = 2π) serving as a reference signal of the L system
F1p / fs) 10 is supplied to the selector 11. One of the angular velocity data (△ ω1N) 9 and the angular velocity data (△ ω1P) 10 is switched by the selector 11 and output. Here, PAL / N of MCU20
From the TSC detection circuit 19, the PAL system or N
A switching control signal based on the determination result of the TSC system is supplied to a control terminal of the selector 11, and switching of the selector 11 is controlled based on the switching control signal. The output of the selector 11 and the detection frequency control signal of the MCU 20 are supplied to the multiplier 12 and multiplied by the multiplier 12. Here, the detection frequency control circuit 1 of the MCU 20
From 7, a control value is supplied to the multiplier 12 so as to control the detection frequency corresponding to the capstan speed. The output of the multiplier 12 is supplied to the integrator 13 and integrated by the integrator 13. The output of the integrator 13 is supplied to the SINROM 14, and the output e (j2πf1t) of the sine curve corresponding to the phase, which is the output of the integrator 13, is output from the SINROM 14.
And output to the multiplier 6. The output e (j2πf1t) of the sine curve and the digital video data output from the A / D converter 5 are multiplied by a multiplier 6, a DC component is extracted by an LPF 7, and supplied to a level detector 8. Thereby, the level of the ATF pilot signal f1 is obtained.

The other ATF pilot signals f2, f3,
By operating the ATF pilot signal detection block 15 similar to that described above for f4, a signal level corresponding to each is obtained. In this case, SI
The NROM 14 is configured in common for the four ATF pilot signal detection blocks 15 so as to read the output of each sine curve from addresses corresponding to the four ATF pilot signals f1, f2, f3, f4.

More specifically, the MCU 20 operates as follows. The capstan FG from the mechanical deck block 1 is a capstan speed detection circuit 1
6 and a capstan speed detection circuit 16 detects the speed of the capstan. The capstan speed from the capstan speed detection circuit 16 is supplied to a detection frequency control circuit 17, and the control value is set to an ATF pilot detection block 15 so that the detection frequency control circuit 17 controls the detection frequency corresponding to the capstan speed. Is supplied to the multiplier 12. ATF pilot signal f1 from ATF pilot detection block 15
Is supplied to the capstan servo circuit 18 via a cable such as a communication cable, and the capstan servo circuit 18 generates a capstan servo output based on the level signal f1level of the ATF pilot signal f1. Capstan servo output is provided. The horizontal synchronization signal Hsync and the like from the video / audio signal processing unit 3 are PAL / NTS
The video signal is supplied to the C detection circuit 19, and the PAL / NTSC detection circuit 19 detects the synchronization of the horizontal synchronizing signal Hsync or the like. Switching control of the selector 11 of the ATF detection block 15 is performed based on this.

Next, using the flowchart of FIG.
An operation of an example of ATF detection frequency control of the CU 20 will be described. In FIG. 2, after starting, first, in step S1
It is determined whether or not the recording method of the tape has been switched. More specifically, the PAL / NTSC detection circuit 19 of the MCU 20 detects the synchronization of the horizontal synchronization signal Hsync or the like, and the PAL, which is a video signal tape recording method, is detected.
The system or the NTSC system is determined.

In step S2, it is determined whether or not drum correction is involved. Specifically, the operation of the mechanical deck block 1 is an FF (fast forward) operation / REW without drum correction.
The MCU 2 determines whether the operation is a (rewind) operation or a variable speed reproduction operation / still reproduction operation with drum correction.

If it is determined in step S2 that no drum correction is involved, the process proceeds to step S3, where the speed of the capstan is detected. Specifically, this is a case where the mechanical deck block 1 performs an FF (fast-forward) operation / REW (rewind) operation, and the capstan speed detection circuit 16 based on the capstan FG from the mechanical deck block 1.
Detects the speed of the capstan. In this case, the speed of the capstan is constant.

In step S4, an optimum detection frequency is output. Specifically, a control value is read from, for example, a memory table or calculated by a microcomputer so that the detection frequency control circuit 17 controls the detection frequency corresponding to the capstan speed. A
It is supplied to the multiplier 12 of the TF pilot detection block 15.

If it is determined in step S2 that drum correction is required, the process proceeds to step S5, where the drum speed is corrected. Specifically, a drum servo of the MCU 20 (not shown) controls the drum motor of the mechanical deck block to correct the rotation of the drum. Then, the process proceeds to step S6.

At step S6, it is determined whether or not there is a reproduced signal. If there is, a return is made to step S1 to return to steps S1 to S1.
The processing and determination up to step S6 are repeated, and when there is no reproduction signal, the processing is terminated.

The control value of the detection frequency corresponding to the capstan speed supplied from the detection frequency control circuit 17 of the MCU 20 to the multiplier 12 of the ATF pilot detection block 15 is based on the current capstan speed and the drum speed. This value is changed depending on the speed correction situation.
For example, if the speed of the capstan is changed without performing the drum speed correction, and the ATF pilot signal to be detected is 5% higher than the frequency during normal reproduction, the value supplied to the multiplier 12 is If the value at the time of normal reproduction is 1, it is changed to 1.05.

Here, the state in which the drum speed is not corrected is, for example, a time when it is not necessary to reproduce an image at the time of an FF (fast forward) operation or a REW (rewind) operation and view it on a monitor. The state in which the drum speed is corrected is, for example, when it is necessary to reproduce an image during variable speed reproduction, still reproduction, or the like and view it on a monitor.

If the speed correction is performed even when the drum speed is not corrected, such as during the above-described FF (fast-forward) operation or REW (rewind) operation, the value is changed as described above. Although it is not necessary, the speed correction is useful when the power consumption becomes high.

The operation of the video signal recording / reproducing apparatus according to the present embodiment is not limited to the above-described flowchart of FIG. 2, but after the drum speed is corrected in step S5, the capstan operation in step S3 is performed. The speed may be detected, and the optimum detection frequency may be output in step S4.

In this way, tracking control, non-recording detection, and the like are performed in the mechanical deck block 1 based on the level signal f1level of the ATF pilot signal f1 from the ATF pilot detection block 15.

In the above-described embodiment, an example has been shown in which the detection frequency is made variable by changing the reference frequency in the ATF pilot signal detection block 15 by multiplying the reference signal by the control value. However, the present invention is not limited to this configuration. For example, the detection frequency may be changed by changing the frequency characteristics of the filter itself.

In the above-described embodiment, 8 mm
Although an example of detection of an ATF pilot signal in a camera-integrated VTR has been described, the present invention is not limited to this.
The present invention may be applied to a magnetic recording device using a.

The video signal recording / reproducing apparatus according to the present embodiment is a mechanical deck block 1 as recording means for recording a video signal together with a recording track guide signal on a recording medium.
A mechanical deck block 1 as a reproducing means for reproducing a video signal recorded on the recording medium together with the recording track guide signal, and a detecting means for detecting a frequency of the recording track guide signal reproduced by the reproducing means ATF pilot signal detection block 15 as well as controlling the detection of the frequency of the detection means according to the recording method of the video signal reproduced by the reproduction means or the running state of the recording medium by the reproduction means, An MCU 20 as control means for controlling the reference signal of the detecting means or controlling the running state of the recording medium by the reproducing means in accordance with the recording method, so that the detection frequency of the recording track guide signal is It can be changed according to the recording method and records the detection frequency of the recording track guide signal. Since it can be changed according to the running state of the body, it is possible to automatically detect an accurate recording track guide signal without correcting the drum speed. Even in the case of accurate tracking, make various judgments,
The quality of the reproduced image can be improved.

In the video signal recording / reproducing apparatus according to the present embodiment, the video signal is recorded in the NTS
Since the system is the C system or the PAL system, the detection frequency of the recording track guide signal can be made variable depending on whether the system is the NTSC system or the PAL system.
Even if the L system is switched, accurate tracking can be performed and the quality of the reproduced image can be improved.

Further, in the video signal recording / reproducing apparatus of this embodiment, the running state of the recording medium is detected by the speed of the capstan running the recording medium. The detection frequency of the recording track guide signal can be made variable, and the quality of the reproduced image can be improved by performing accurate tracking according to the reproduction operation.

Further, the video signal recording / reproducing apparatus of the present embodiment has the
Since the control of the frequency detection of the ATF pilot signal detection block 15 as the above-mentioned detecting means is performed at the time of the fast-forward operation or the rewind operation, the control value of a constant value is used for the constant-speed operation. The detection frequency of the recording track guide signal can be controlled.

In the video signal recording / reproducing method according to the present embodiment, a recording step of recording a video signal on a recording medium together with a recording track guide signal; A reproducing step of reproducing the signal together with the signal, a detecting step of detecting the frequency of the recording track guide signal reproduced in the reproducing step, and a step of detecting a recording method of the video signal reproduced in the reproducing step (step S1). Detecting the running state of the recording medium in the reproducing step (step S3), and controlling the frequency detection in the detecting step according to the video signal recording method or the running state of the recording medium (step S4). Together with the control of the reference signal of the detection step or the reproduction step according to the recording method. And a control step of controlling the running state of the recording medium, so that the detection frequency of the recording track guide signal can be made variable in accordance with the recording method of the video signal. Since the detection frequency can be changed according to the running state of the recording medium, first, the recording method of the video signal is prioritized, the reference signal is switched accordingly, and the detection frequency of the recording track guide signal is changed. In addition, the detection frequency of the recording track guide signal can be finely changed according to the running state of the recording medium, the change becomes easy, and the accurate recording track guide signal is automatically detected without correcting the drum speed. This makes it possible to accurately track even when the pitch of the recording track is different by the reproducing means, perform various determinations, and improve the quality of the reproduced image. It can be.

The video signal recording / reproducing method according to the present embodiment is the same as that described above, except that the video signal recording method is NTS.
Since the system is the C system or the PAL system, the detection frequency of the recording track guide signal can be made variable depending on whether the system is the NTSC system or the PAL system.
Even if the L system is switched, accurate tracking can be performed and the quality of the reproduced image can be improved.

Further, in the video signal recording / reproducing method of the present embodiment, in the above description, the running state of the recording medium is detected by the speed of the capstan running the recording medium. The detection frequency of the recording track guide signal can be made variable, and the quality of the reproduced image can be improved by performing accurate tracking according to the reproduction operation.

In the video signal recording / reproducing method according to the present embodiment, in the above description, the control of the frequency detection in the detection step in the control step is performed during a fast-forward operation or a rewind operation. The detection frequency of the recording track guide signal can be controlled using a constant control value for the speed operation.

In this embodiment described above, the video signal recording / reproducing apparatus is only an example applied to the reproduction of a video signal recorded by a camera-integrated 8 mm VTR. It is needless to say that the present invention is not limited to this and may be used in a digital or analog camera-integrated VTR. Further, the identification signal may be an audio signal instead of the video signal. The video signal may be of the PAL type instead of the NTSC type.

[0051]

The video signal recording / reproducing apparatus of the present invention comprises a recording means for recording a video signal together with a recording track guide signal on a recording medium, and a video signal recorded on the recording medium together with the recording track guide signal. A reproducing means for reproducing,
Detecting means for detecting the frequency of the recording track guide signal reproduced by the reproducing means, and a recording method of a video signal reproduced by the reproducing means or a running state of the recording medium by the reproducing means, Control means for controlling the detection of the frequency of the detecting means and controlling the reference signal of the detecting means or controlling the running state of the recording medium by the reproducing means in accordance with the recording method. The detection frequency of the guide signal can be made variable according to the recording method of the video signal, and the detection frequency of the recording track guide signal can be made variable according to the running state of the recording medium. Without correction, an accurate recording track guide signal can be automatically detected. Any tracking properly if you performs various discrimination, an effect that it is possible to improve the quality of the reproduced image.

Also, the video signal recording / reproducing apparatus of the present invention
In the above description, since the recording system of the video signal is the NTSC system or the PAL system, the NTSC system or the PAL system is used.
The detection frequency of the recording track guide signal can be made variable according to the L system, and even if there is a switching between the NTSC system and the PAL system, it is possible to accurately track and improve the quality of the reproduced image. .

Also, the video signal recording / reproducing apparatus of the present invention
In the above description, since the running state of the recording medium is detected by the speed of the capstan that runs the recording medium,
The detection frequency of the recording track guide signal can be made variable in accordance with the speed of the capstan, and the effect is that the quality of the reproduced image can be improved by performing accurate tracking depending on the reproducing operation.

Also, the video signal recording / reproducing apparatus of the present invention
In the above, the control of the frequency detection by the detection means in the control means is performed at the time of fast-forward operation or rewind operation. There is an effect that the detection frequency of the track guide signal can be controlled.

Also, the video signal recording / reproducing method of the present invention
A recording step of recording a video signal on a recording medium together with a recording track guide signal; a reproducing step of reproducing the video signal recorded on the recording medium together with the recording track guide signal; and the recording reproduced by the reproducing step A detecting step of detecting the frequency of the track guide signal, and detecting a recording method of the video signal reproduced in the reproducing step, and then detecting a running state of the recording medium in the reproducing step to record the video signal. Or controlling the frequency detection in the detection step according to the running state of the recording medium, and controlling the reference signal in the detection step or controlling the running state of the recording medium in the reproducing step in accordance with the recording method. The control frequency of the recording track guide signal. Since the detection frequency of the recording track guide signal can be changed according to the running state of the recording medium, the recording method of the video signal is given priority first. After changing the detection frequency of the recording track guide signal by switching the reference signal accordingly, the detection frequency of the recording track guide signal can be finely changed according to the running state of the recording medium, and the change is easy. Thus, an accurate recording track guide signal can be automatically detected without correction of the drum speed, whereby accurate tracking can be performed even when the recording track pitch is different by the reproducing means, and various discriminations can be made. This makes it possible to improve the quality of the reproduced image.

Also, the video signal recording / reproducing method of the present invention
In the above description, since the recording system of the video signal is the NTSC system or the PAL system, the NTSC system or the PAL system is used.
The detection frequency of the recording track guide signal can be made variable according to the L system, and even if there is a switching between the NTSC system and the PAL system, it is possible to accurately track and improve the quality of the reproduced image. .

Also, the video signal recording / reproducing method of the present invention
In the above description, since the running state of the recording medium is detected by the speed of the capstan that runs the recording medium,
The detection frequency of the recording track guide signal can be made variable in accordance with the speed of the capstan, and the effect is that the quality of the reproduced image can be improved by performing accurate tracking depending on the reproducing operation.

Also, the video signal recording / reproducing method of the present invention
In the above description, the control of the frequency detection in the detection step in the control step is performed at the time of the fast-forward operation or the rewind operation, so that the recording is performed by using the control value of a constant value for the constant-speed operation. There is an effect that the detection frequency of the track guide signal can be controlled.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an operation of ATF detection frequency control of the MCU according to the embodiment of the present invention.

[Explanation of symbols]

1 ... Mechanical deck block, 2 ... Reproduction amplifier, 3 ...
Video / audio signal processing unit, 4 ... LPF, 5 ...
A / D converter, 6 Multiplier, 7 LPF, 8 Level detector, 9 Angular velocity data (△ ω1N), 10
... Angular velocity data (△ ω1P), 11 ... Selector, 1
2 Multiplier, 13 Integrator, 14 SIN RO
M, 15... ATF pilot signal detection block, 16
... Capstan speed detection circuit, 17 ... Detection frequency control circuit, 18 ... Capstan servo circuit, 19 ...
... PAL / NTSC detection circuit, 20 MCU, 21
... terminals,

Claims (8)

[Claims] Recording means for recording a video signal on a recording medium together with a recording track guide signal; reproducing means for reproducing the video signal recorded on the recording medium together with the recording track guide signal; Detecting means for detecting a frequency of the reproduced recording track guide signal; and a frequency of the detecting means according to a recording method of a video signal reproduced by the reproducing means or a running state of the recording medium by the reproducing means. Controls the detection of
A video signal recording / reproducing apparatus, comprising: a control means for controlling a reference signal of the detecting means or controlling a running state of the recording medium by the reproducing means in accordance with the recording method. 2. The video signal recording / reproducing apparatus according to claim 1, wherein the video signal recording system is an NTSC system or a PAL system. 3. The video signal recording / reproducing apparatus according to claim 1, wherein the running state of the recording medium is detected by a speed of a capstan that runs the recording medium. 4. The video signal recording / reproducing apparatus according to claim 1, wherein the control of the detection of the frequency by the detection means in the control means is performed during a fast-forward operation or a rewind operation. Signal recording / reproducing device. 5. A recording step of recording a video signal together with a recording track guide signal on a recording medium; a reproducing step of reproducing the video signal recorded on the recording medium together with the recording track guide signal; A detecting step of detecting the frequency of the reproduced recording track guide signal; and, after detecting a recording method of the video signal reproduced in the reproducing step, detecting a running state of the recording medium in the reproducing step, Controlling the frequency detection in the detection step according to a video signal recording method or a running state of the recording medium, and controlling the reference signal in the detection step or the recording medium in the reproduction step according to the recording method. A control step for controlling a running state of the video signal recording and reproducing apparatus. Method. 6. The video signal recording / reproducing method according to claim 5, wherein the video signal recording system is an NTSC system or a PAL system. 7. The video signal recording / reproducing method according to claim 5, wherein a traveling state of the recording medium is detected by a speed of a capstan for traveling the recording medium. 8. The video signal recording / reproducing method according to claim 5, wherein the control of the frequency detection in the detection step in the control step is performed during a fast-forward operation or a rewind operation. Signal recording and playback method.