JPH0530466A - Video signal recorder and signal recording medium - Google Patents

Abstract

PURPOSE:To record an inhibition signal, which is easily detected without practical degradation of a reproduced picture and is difficult to illegally copy, in a signal recording medium. CONSTITUTION:An antis-signal of copy inhibition or a pilot signal of copy permission is recorded by a high vision signal recording processing circuit 100. A timing generating circuit 108 which detects the timing of a synchronizing signal from a TDM encoder 107, a synchronizing signal generating circuit 109 which generates a synchronizing signal SYNC at the synchronizing signal generation timing, and a copy control signal generating circuit 110 which generates a copy control signal indicating copy inhibition or permission to a reserved area after the synchronizing signal are provided. The synchronizing signal SYNC and the copy control signal are superposed in the synchronizing signal insertion position and the reserved area through signal adding circuits 111 and 112 by time base multiplexing and are recorded on a video tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing device, and more particularly to a video signal recording device for prohibiting or legally permitting illegal copying (or dubbing) of a video signal and such prohibition or permission of copying. And a signal recording medium having a copy control signal recorded therein.

[0002]

2. Description of the Related Art As a method for prohibiting illegal copying of video signals recorded on a video tape, for example, in a consumer VTR, it is necessary to incorporate an anti-piracy signal indicating that copying is prohibited into a sync signal portion. Being tried. However, the method of incorporating the anti-piracy signal in the sync signal portion has a problem that the anti-piracy signal is easily released by replacing the sync signal portion. As another method for preventing illegal copying, a method has been proposed in which an anti-piracy signal having a frequency higher than the frequency band of the video signal is superimposed on the video signal. In this method, since the anti-piracy signal exists in the frequency region higher than the frequency band of the video signal, there is little problem that the image reproduced by the monitor device is deteriorated. However, an anti-piracy signal is easily removed by a low-pass filter with a simple circuit configuration, and illegal copying cannot be effectively prevented. Although other methods can be considered as a method for preventing illegal copying, an effective method for effectively preventing illegal copying without causing deterioration in the reproduced image when the monitor device is reproduced in a normal form is not yet available. Not realized.

In view of such a situation, the inventor of the present application has proposed an anti-piracy signal which is a video signal which does not cause substantial deterioration in image quality of a reproduced video signal in a high-definition monitor device and which is practically difficult to cancel. Has been proposed (for example, "video signal processing device" filed on June 14, 1991). Figure 10
12 is an overall configuration diagram of a video signal processing device such as a high definition video device. FIG. 11 is a frequency characteristic diagram of an anti-piracy signal superimposed on the video signal.
FIG. 6 is a diagram showing a timing at which an anti-piracy signal is intermittently superimposed.

In FIG. 10, a reproduced image signal output from the first video device 1 is displayed on the monitor device 5 as a reproduced image, and recorded by the second video device 6. In order to prohibit recording in the second video device 6 of the video signal composed of the luminance signal Y, the first color difference signal P _B and the second color difference signal P _R reproduced by the first video device 1, The anti-piracy signal generation circuit 2 generates an anti-piracy signal, and the signal superposition circuit 3 superimposes the anti-piracy signal on the reproduced video signal.
In order to prohibit the recording of the video signal on which the anti-piracy signal is superimposed, the anti-piracy signal detection circuit 7 detects the anti-piracy signal and outputs the signal STOP indicating the prohibition of recording to the second video device 6. To do.

The anti-piracy signal generation circuit 2 has a matrix circuit 21, a control circuit 22, a signal generation circuit 23 and an anti-piracy signal distribution circuit 24. The matrix circuit 21 converts the luminance signal Y, the first color difference signal P _B and the second color difference signal P _R into three primary colors G, B and R by a known matrix calculation. The control circuit 22 analyzes the converted G, B, and R component ratios, and calculates the ratios of the anti-piracy signals py, pb, and pr calculated for each G, B, and R in the anti-piracy signal distribution circuit 24. calculate. The anti-piracy signal distribution circuit 24 outputs the anti-piracy signals py, pb, pr based on the anti-piracy signal distribution ratio calculated by the control circuit 22, using the frequency signal output from the signal generation circuit 23. . The signal superposition circuit 3 uses the anti-piracy signal py,
pb and pr are superimposed on the luminance signal Y, the first color difference signal P _B , and the second color difference signal P _R , respectively.

As shown in FIG. 11, the anti-piracy frequency f _AP of the anti-piracy signal is set in a frequency interleave relationship based on the following equation 1 with respect to the horizontal scanning frequency f _H which defines horizontal synchronization. f _AP = (N + 1/2) f _H (1) N is a frequency division ratio of a frequency dividing circuit (not shown) in the PLL circuit in the signal generating circuit 23. The anti-piracy signal has the above-mentioned frequency relationship, and has an amplitude that can be detected to prohibit illegal copying and has an amplitude below a certain level that does not cause substantial deterioration in the reproduced image on the monitor device 5. ing.

As shown in FIG. 12, the anti-piracy signal is superposed at intermittent timings so that the reproduced image in the monitor device is not substantially deteriorated. That is, the anti-piracy signal is not superimposed on every field, but is superimposed on the luminance signal Y, the first color-difference signal P _B , and the second color-difference signal P _R by one field per a plurality of fields. However, in the signal region of the video signal, for example, the luminance signal Y, the anti-piracy signal py is superimposed on the substantial luminance signal component in the horizontal blanking period following the ternary synchronization signal, and the anti-piracy signal py is synchronized. The anti-piracy signal py is not superposed on the signal portion, and the synchronization disturbance caused by superposing the anti-piracy signal on the synchronization signal portion is not caused. Superimposing the pilot signal on the video signal (superimposing on the actual signal component) is
At a certain intensity (amplitude), the superimposition of the integration effect of the eyes of the human watching the monitoring device is superposed for a time T _ON , and the interval T _OFF at which the integration effect of the eyes is reset is prohibited. By changing _the duty in this way, _the equivalent strength to _the eyes is reduced. Thus, the frequency f _H
Even if the anti-piracy signal within the above amplitude range is superposed on the video signal, it has a frequency interleave relationship with the TV.
The reproduced image on the screen 52 is virtually unaffected.

The anti-piracy signal detection circuit 7 of FIG.
A matrix circuit 71, a control circuit 72, a signal synthesizing circuit 73 and a detecting circuit 74 are provided therein. The matrix circuit 71, like the matrix circuit 21 in the anti-piracy signal generating circuit 2, has a luminance signal Y on which the anti-piracy signal is superimposed, a first color difference signal P _B , and second color difference signals P _R to G, Convert to B and R. The control circuit 72 also calculates the anti-piracy signal distributions xg, xb, and xr similarly to the control circuit 22 in the anti-piracy signal generation circuit 2. The signal synthesizing circuit 73 synthesizes the anti-piracy signal in phase with the polarity of this distribution ratio. When the level of the synthesized anti-piracy signal P is equal to or higher than a predetermined level, the detection circuit 74 outputs the dubbing prohibition signal STOP to the second video device 6, and the second video device 6 records the input video signal. To stop.

[0009]

In the video signal processing device described with reference to FIGS. 10 to 12, there is a frequency interleave relationship with the frequency f _H, and the amplitude range is such that the reproduced image does not deteriorate in image quality. A certain anti-piracy signal is superimposed on the video signal and it is judged whether or not copying is prohibited. The detected anti-piracy signal is detected. However, the copying is prohibited by a simpler circuit configuration or copying is legally permitted. It is desired to record the copy control signal to the signal recording medium and to detect the copy control signal accurately from the signal recording medium.

[0010]

In order to solve the above problems, in the present invention, a copy control signal for prohibiting copying or permitting copying in a form different from a video signal output for transmission is used as a signal recording medium. To record. According to the first aspect of the present invention, a copy control signal for prohibiting or permitting copy of the baseband signal recorded in the reserved area is time-division multiplexed and recorded in the reserved area in the video track of the signal recording medium. A video signal recording device is provided. According to a second aspect of the present invention, there is provided a video signal recording device for frequency-multiplexing a copy control signal having a frequency lower than the frequency band of a frequency-modulated video signal on a video signal and recording the signal on a signal recording medium. It Third of the present invention
According to this aspect, there is provided a video signal recording device for recording a copy control signal as a part of data such as an index in the index area of the signal recording medium. Alternatively, according to the present invention, a signal recording medium recorded by the above video signal recording apparatus, that is, (1) a baseband signal and a copy control signal are recorded by time division multiplexing in a reserve area in the video track. A signal recording medium, (2) a signal recording medium in which a copy control signal having a frequency lower than the frequency band of the frequency-modulated video signal is recorded on the video signal by frequency multiplexing, and
(3) A signal recording medium in which a copy control signal is recorded in the index area is provided.

[0011]

According to the video signal recording apparatus of the first aspect of the present invention, the copy control signal can be recorded in the reserve area up to the maximum level defined as the time division multiplexed signal. Therefore, the reproduction S / N can be made sufficiently high and the copy control signal can be easily detected. On the other hand, the copy control signal recorded in the reserve area has no adverse effect on the reproduced video signal. According to the video signal recording apparatus of the second aspect of the present invention, since the frequency band of the copy control signal is different from the frequency band of the video signal, the copy control signal having a sufficiently large amplitude can be frequency-multiplexed. Also in this case, the playback S /
Since N is sufficiently high, it becomes easy to detect the copy control signal. On the other hand, the copy control signal recorded in the reserve area does not substantially affect the reproduced video signal. According to the video signal recording apparatus of the third aspect of the present invention,
Since the copy control signal is recorded in the index area, it has no adverse effect on the reproduced video signal and its detection is easy. Since none of the above copy control signals is inserted in the synchronization signal portion, synchronization is not disturbed. Further, when the signal recording medium recorded by such a method is loaded on a video signal processing device such as a video device, the detection is easily performed as described above, and illegal copying can be easily prohibited. In addition, legal copying may be permitted.

[0012]

1 shows a signal recording processing circuit 100 in a high-definition video apparatus as a first embodiment of a video signal recording apparatus of the present invention. The signal recording processing circuit 100 is a copy control signal indicating prohibition or permission of copying recorded in a reserved area which is an unused portion of a portion where a ramp signal for linearity correction of a video signal recorded on a video tape is recorded. Is output and recorded on a video tape via a rotating drum (not shown). Signal recording processing circuit 10
0 is a low-pass filter (LP) that passes low-frequency components included in the analog luminance signal Y, the first color difference signal P _B , and the second color difference signal P _R as a video signal (video signal).
F) 101 to 103, A / D converter 104 to convert the outputs of LPFs 101 to 103 into digital video signals
106, time-division multiplexing (TD) that performs digital filtering, time-axis compression, expansion, shuffling, etc. on digital video signals from the A / D converters 104 to 106.
M) Encoder 107, 2 from this TDM encoder
D / A converters 113 and 114 for converting the digital output of the channel into an analog video signal, and LPF1
It has 15,116. Although not shown in FIG.
After the LPFs 115 and 116, for example, the analog signal processing circuit 207 and the FM modulation circuit 20 shown in FIG.
8. Recording amplifier circuit 2 connected to magnetic rotating drum 215
A circuit equivalent to 11 is provided. Signal recording processing circuit 10
0 further includes a timing generation circuit 108 connected to the TDM encoder 107, a synchronization signal generation circuit 109, a copy control signal generation circuit 110, and a signal addition circuit 1.
11, 112 are provided.

FIG. 2 shows an example of the format (recording pattern) of the video tape in which the signal from the signal recording processing circuit 100 of FIG. 1 is recorded by the rotating drum. In this embodiment, a video signal portion following the preamble portion PREAMBLE having a length of 4.5H having a sync signal SYNC recording portion, a burst signal recording portion and an ID signal recording portion is provided, for example, for linearity correction. The copy control signal is recorded in the reserved area which is an unused portion of the portion for recording the ramp signal.

The timing generation circuit 108 detects the timing at which the portion where the synchronization signal SYNC is recorded is located from the processing signal of the TDM encoder 107, and outputs the timing signal to the synchronization signal generation circuit 109. The synchronization signal generation circuit 109 generates the synchronization signal SYNC at that timing and outputs it to the signal addition circuit 117. Signal addition circuit 1
Reference numeral 17 designates the synchronizing signal SYNC as the signal adding circuit 111, 1
Then, the synchronization signal SYNC is inserted into the synchronization signal position of the signal output from the TDM encoder 107. The timing signal generating the synchronization signal SYNC is output from the synchronization signal generation circuit 109 to the copy control signal generation circuit 110. The copy control signal generation circuit 110 refers to the timing from the synchronization signal generation circuit 109 to detect the timing at which the reserve area following the position where the ramp signal is recorded is positioned, and the anti-piracy signal AP or the copy permission signal indicating the copy prohibition is detected. Is output to the signal addition circuit 117.
The signal addition circuit 117 inserts the anti-piracy signal AP or the copy permission signal in the reserve area. As a result, the signal in which the copy control signal is inserted in the reserve area is recorded on the video tape via the rotary drum.

FIG. 4 shows a first example of the copy control signal. In FIG. 4A, the signal of logic "1" generated in the copy control signal generation circuit 110 is recorded in the reserve area and copying is permitted, and in FIG. 4B, the signal from the copy control signal generation circuit 110 is reversed. This indicates that the reserved area has not been generated, is unused, and is in the copy prohibited state. If nothing is recorded in the reserved area, copying of the video tape is prohibited, so in this example,
The anti-piracy signal AP is not output, and the copy control signal generating circuit 110 is configured to output a pilot signal of logic "1" only when copying is permitted.

FIG. 5 shows a second example of the copy control signal. In FIG. 5A, copying is possible only when the digital pilot signal “10101” generated by the copy control signal generation circuit 110 is recorded in the reserve area, and FIG.
Is generated by the copy control signal generation circuit 110.
An example in which a digital anti-piracy signal AP of "10" is recorded in the reserve area to prohibit copying is shown. Also in this example, the reserved area for prohibiting copying is replaced with the data pattern shown in FIG.
The state without data shown in (B) can be obtained.

FIG. 6 shows a third example of the copy control signal. In FIG. 6A, copying is possible only when the pilot signal in which the AC component is superimposed on the DC component generated by the copy control signal generating circuit 110 is recorded in the reserve area.
(B) shows an example in which nothing is recorded in the reserve area and copying is prohibited.

The data pattern of the copy control signal which is recorded in the reserved area and prohibits or permits copying is not limited to the above-mentioned example, and various other patterns can be used. The video device is provided with a copy inhibition signal detection circuit for detecting the copy control signal from the video tape. The copy prohibition signal detection circuit detects the reserved area after detecting the synchronization signal SYNC, and prohibits the operation of the recording circuit unless the signal recorded in the reserved area is the above-mentioned specific pilot data pattern.
In this embodiment, since the copy control signal can be recorded up to the maximum level defined as the TDM signal, the reproduction S / N is sufficient and the copy control signal can be detected reliably. On the other hand, it does not have any adverse effect on the reproduced video signal. If the illegal copying is performed, a circuit having a complicated structure for detecting the above-mentioned reserved area and further detecting the above-mentioned signal is required, and the illegal copying cannot be easily performed.

FIG. 7 shows a circuit configuration of a signal recording system 200A and a signal reproducing system 200B in a high-definition video apparatus 200 as a second embodiment of the video signal recording apparatus of the present invention. In this video device 200, as shown in FIG. 8, a pilot signal P or an anti-piracy signal AP having a frequency lower than the frequency band of the FM-modulated video signal is frequency-multiplexed with the video signal and recorded on a video tape. To do. In this example, copying is permitted when pilot signal P is present and copying is prohibited when no signal is present.

The signal recording system 200A has substantially the same circuit configuration as the signal recording processing circuit 100 shown in FIG. However, instead of the copy control signal generation circuit 110 shown in FIG. 1, the signal addition circuit 21 is provided at the subsequent stage of the FM modulation circuit 208.
A pilot signal generation circuit 209 for adding 0 and generating a pilot signal indicating permission of copying is separately provided. The signal reproduction system 200B includes a reproduction amplifier circuit 221, a high-pass filter (HP) for amplifying a signal detected by the rotary drum 215.
F) 222, FM demodulation circuit 223, analog signal processing circuit 224, LPF 225, A / D converter 226, T
It has a TDM decoder 227, a D / A converter 228, and an LPF 229 that perform signal processing reverse to that of the DM encoder 203. The signal reproduction system 200B further includes the LPF 23.
1. Copy signal processing circuit 23 including detection circuit 232, OR gate circuit 233, and copy prohibition processing circuit 234
Has 0. The above circuit configuration shows only one system for the luminance signal Y and one system for the A channel CHA, but other systems have the same circuit configurations as above.

The TDM signal is FM-modulated in the FM modulation circuit 208 and recorded on the video tape, but the frequency spectrum after the FM modulation has very few signal components at low frequencies as shown in FIG. The pilot signal generation circuit 209 outputs the pilot signal P having a frequency lower than the frequency spectrum FM-modulated for the video signal to the signal addition circuit 210 only when the copy is permitted,
The pilot signal P is frequency-multiplexed with the modulated video signal. The LPF 231 passes only the pilot signal P, and the detection circuit 232 detects the passed pilot signal P to detect the pilot signal P. OR gate circuit 2
In 33, it is detected that the pilot signal P is included in any of the channels, and the copy prohibition processing circuit 234 permits the operation of the TDM decoder 227 only when the pilot signal P exists to enable the normal reproduction operation of the video signal. To On the other hand, when the pilot signal P is not detected, the copy signal processing circuit 230 notifies the TDM decoder 227 to that effect. In this case, the TDM decoder 227, for example, superimposes a signal having a large amplitude at a frequency within the frequency band of the video signal on the reproduced video signal and outputs the superimposed signal to remarkably deteriorate the reproduced image, effectively invalidating the copy. FM
By using the pilot signal P having a frequency different from the frequency band of the modulated video signal, the copy signal processing circuit 23
The detection of the pilot signal P at 0 becomes easy. Further, since the frequency of this pilot signal is different from the frequency band of the FM-modulated video signal, the level of the pilot signal generated by the pilot signal generation circuit 209 can be made large, the reproduction S / N is good and the pilot signal Detection is easier.

As a method of recording the pilot signal P,
(1) A method of superimposing and recording a pilot signal of the same frequency for both A and B channels on the entire video track
(2) A method of superimposing and recording a pilot signal having a different frequency for each channel for several tracks, (3) A method of superimposing and recording a pilot signal of any one of the above frequencies only in a specific segment, (4) These Various methods such as a combination method can be adopted.

FIG. 9 shows the circuit configuration of a high-definition video apparatus as a third embodiment of the video signal recording apparatus of the present invention. The circuit diagram of FIG. 9 corresponds to the signal recording system 200A ′ corresponding to the signal recording system 200A for recording the video signal and the signal reproducing system 200B for reproducing the video signal described with reference to FIGS. 1 and 7. In addition to the signal reproduction system 200B ', the audio signal processing systems 300A and 300B are also shown. Figure 9
This video device is further provided with a copy prohibition processing circuit 400. In this embodiment, as shown in the format of the video tape shown in FIG. 2, when an index part ID between the audio track AUDIO and the video track is provided, this index part ID
A copy control signal indicating copy prohibition or permission is recorded in.

Indexes such as a time code, a program number, a cue flag, etc. are recorded in the index part ID. In this embodiment, one to several bits of this data are assigned as copy control data. For example,
When 1 bit is assigned, copy is permitted when it is “1” and copy is prohibited when it is “0”. Alternatively, the reverse logic may be used. When 2 bits are allocated,
When "00", copying is permitted, when "01", copying is permitted only once, and when "11", copying is prohibited. The circuit configuration of FIG. 9 is a circuit configuration when the index signal is processed similarly to the audio signal.

A switch 21 is provided in the signal recording system 200A '.
3,214 are provided. These switches are energized to the positions indicated by the solid lines in the drawing when the copy control signals are superimposed from the audio signal processing systems 300A and 300B. The audio signal processing systems 300A and 300B respectively record and reproduce audio signals for two channels. Channels 1 and 2
The audio signal processing system 300A for
/ D converter 302, error correction circuit 303, RAM
It has an audio signal recording circuit consisting of 304, 8/10 bit modulation circuit 305 and NRZI processing circuit 306. In addition, the audio signal processing system 300A includes an equalizer 31
1, NRZI processing circuit 312, 8/10 bit demodulation circuit 313, RAM 304, error correction circuit 303, D / A
It has a converter 316 and an LPF 317. RAM
The 304 and the error correction circuit 303 are shared for recording and reproduction. The copy inhibition processing circuit 400 includes a system control microcomputer 401, an index processing microcomputer 402, and a copy inhibition signal processing circuit 403.

Since the system control microcomputer 401 controls the entire copy inhibition or permission, the switches 213 and 214 are energized or deactivated, and the timing signal and the copy control data are transferred to the index processing microcomputer 402. Between transmit.
When recording copy control data, the microcomputer 401 for system control uses the switch 21.
3, 214 is energized to the state indicated by the solid line in the figure, and the copy control data is output to the index processing microcomputer 402. Index processing microcomputer 4
02, the copy control data is written in the RAM 304 as index data at the timing from the system control microcomputer 401. RAM30
The copy control data written in No. 4 is modulated as index data and recorded on the video tape via the rotary drum 215. During reproduction, the copy control data detected by the rotary drum 215 is demodulated as index data and stored in the RAM 304. In response to the timing from the system control microcomputer 401, the index processing microcomputer 402 inputs the reproduction copy control data stored in the RAM 304 and determines whether or not the data indicates copy prohibition. If the data indicates the copy prohibition, the index processing microcomputer 402 drives the copy prohibition signal processing circuit 403 to notify the TDM decoder 227 that the copy is prohibited. When the TDM decoder 227 receives the copy prohibition information, for example, the reproduced video is remarkably deteriorated by superimposing a pilot signal having a large amplitude within the frequency band of this video signal on the output video signal, and thus the reproduced image is substantially deteriorated.
Disable copy.

As an embodiment of the present invention, a signal recording medium such as a video tape on which a copy control signal is recorded by the above video device can be obtained. If such a signal recording medium is used, the copy control information is detected as described above.

[0028]

As described above, according to the present invention, an image in which a copy prohibition signal is recorded on a signal recording medium while the reproduced image is not substantially deteriorated and is easy to detect but difficult to illegally copy. A signal recording device is provided. Alternatively, according to the present invention, there is provided a signal recording medium in which the copy prohibition signal is recorded by the video signal recording device.

[Brief description of drawings]

FIG. 1 is a partial configuration diagram of a signal recording processing circuit in a video device of a first embodiment of a video signal recording device of the present invention.

FIG. 2 is a diagram showing a recording format of a video tape recorded via a signal recording processing circuit shown in FIG.

3 is a diagram showing a preamble portion in the video tape shown in FIG. 2 and a reserve area in which a copy control signal is recorded by a signal recording processing circuit shown in FIG.

FIG. 4 is a diagram showing a first example of a data pattern indicating copy control recorded in a reserve area of a video tape via the signal recording processing circuit shown in FIG.

5 is a diagram showing a second example of a data pattern showing copy control recorded in a reserve area of a video tape via the signal recording processing circuit shown in FIG.

6 is a diagram showing a third example of a data pattern showing copy control recorded in the reserve area of the video tape via the signal recording processing circuit shown in FIG.

FIG. 7 is a configuration diagram of a video signal recording / reproducing processing system of a video device as a second embodiment of the video signal recording device of the present invention.

8 is a diagram showing a frequency relationship between an FM-modulated video signal and a pilot signal which is frequency-multiplexed and superimposed on the video signal in the video device of FIG.

FIG. 9 is a configuration diagram of a signal processing system of a video device as a third embodiment of the video signal recording device of the present invention.

FIG. 10 is a diagram showing a configuration of a video signal processing device for recording an anti-piracy signal on a video tape as a prior art of the present invention.

11 is a frequency characteristic diagram of an anti-piracy signal in the video signal processing device shown in FIG.

12 is a superimposition timing diagram of anti-piracy to be superimposed on a video signal in the video signal processing device shown in FIG.

[Explanation of symbols]

100..Signal recording processing circuit, 107..TDM encoder, 108..timing generation circuit, 109..synchronization signal generation circuit, 110..copy control signal generation circuit, 200A..signal recording system, 200B..signal reproduction System, 209..Pilot signal generation circuit, 215..Rotating drum, 227..TDM decoder, 230..Copy signal processing circuit, 232..Detection circuit, 234..Copy prohibition processing circuit, 300A, 300B.
• Audio signal processing system, 400 ... Copy prohibition processing circuit, 401 ... System control microcomputer, 402 ... Index processing microcomputer, 403 ... Copy prohibition signal processing circuit

Claims (6)

[Claims] 1. A video signal recording apparatus, characterized in that a copy control signal is time-division multiplexed with a baseband signal recorded in a reserved area in a video track of a signal recording medium and recorded. 2. A video signal recording apparatus, wherein a frequency-modulated video signal is frequency-multiplexed with a signal indicating a copy control having a frequency lower than the frequency band of the video signal and recorded on a signal recording medium. 3. A video signal recording apparatus, wherein a copy control signal is recorded as part of data such as an index in an index area of a signal recording medium. 4. A signal recording medium, characterized in that a copy control signal is time-division multiplexed and recorded in a reserve area in the video track in a baseband signal recorded in the reserve area. 5. A signal recording medium, wherein a frequency-multiplexed video signal is recorded with a copy control signal having a frequency lower than the frequency band being frequency-multiplexed. 6. A signal recording medium, wherein a copy control signal is recorded in the index area in such a manner that a copy control signal is superimposed on a baseband signal recorded in the index area.