JPH06342584A - Video signal magnetic recording device and video signal magnetic reproducing device - Google Patents

Abstract

PURPOSE:To simplify the constitution and to transmit rewritten information by replacing 1st information relative to a reproduced 2nd information signal with a 1st information signal and outputting a reproducing information signal. CONSTITUTION:The 2nd reproduced information signal 15a is supplied from a decoder 15, and prescribed information of the information signal is rewritten by using information expressed by the 2nd reproduced information signal 15a. That is, when there is a discrepancy between information expressed by a TCI information signal 21a interposed in a video signal and the information expressed by the 2nd reproduced information signal 15a, the information expressed by the 2nd reproduced information signal 15a is preferential. By this method, even when information multiplexed by a control signal such as program searching information, etc., recorded on a magnetic tape is rewritten, this information is interposed in a prescribed line of the video signal and can be outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal magnetic recording device and a video signal magnetic reproducing device.

[0002]

2. Description of the Related Art In a conventional video signal magnetic recording / reproducing apparatus (hereinafter abbreviated as "VTR"), a program is performed by varying and recording a duty ratio of a control signal serving as a time reference of a servo system during reproduction. An information signal such as the cue of the recording was multiplexed with the control signal and recorded.

A conventional VTR will be described with reference to a recording system with reference to FIG. The composite video signal aa is supplied from a transmission line (not shown) to the YC separation means 1 composed of a comb filter,
The luminance signal and the color signal separated here are supplied to the luminance signal recording processing means 2 and the color signal recording processing means 3, respectively.
The luminance signal recording processing means 2 obtains a recording luminance signal obtained by applying emphasis to the luminance signal to emphasize its high frequency components, then limiting the amplitude to prevent overmodulation, and performing FM modulation by a predetermined deviation. Was supplied to one input of the addition means 4. On the other hand, the color signal recording processing means 3 converts the color signal into the low frequency range, and performs the PS processing (or PI processing) for shifting the signal phase by 90 degrees for each 1H in order to cancel the crosstalk during the reproduction on the reproduction screen. The recording color signal thus obtained was supplied to the other input of the adding means 4. Then, the adding means 4 supplies the signal obtained by frequency-multiplexing the recording luminance signal and the recording color signal to the magnetic heads A1 and A2 arranged at the opposite positions on the rotating drum via the selecting means 5, and magnetically It was recorded on tape TT.

Further, an information signal 6a such as a cue of a program generated based on the operation of the operator is supplied to the encoder 6, where the duty ratio of the control signal is determined. That is, one rotation of the rotating drum is set as one cycle, and the duty ratio of the control signal 6b synchronized with the rotation is set as the information signal 6a.
The recording control signal 6c variably obtained based on the above is supplied to the control signal recording processing means 7. The recording control signal 6c is amplified by the control signal recording processing means 7 to a predetermined level, and is amplified via the selecting means 8.
It was supplied to the magnetic head C1 and recorded on a control track formed in the longitudinal direction of the magnetic tape TT.
Since it is difficult to accurately determine the duty ratio of the control signal during reproduction, the information signal 6a has a transmission rate of 2 bits / frame.

Next, to explain the reproducing system, the magnetic tape T
The video signal reproduced by the magnetic heads A1 and A2 from T is supplied to the high-pass filter 9 and the low-pass filter 10 via the selection means 5, and separated into a signal related to the luminance signal and a signal related to the chrominance signal. And is supplied to the luminance signal reproduction processing means 11 and the color signal reproduction processing means 12, respectively. Then, the luminance signal reproduction processing means 11 performs FM demodulation and then supplies the reproduction luminance signal obtained by de-emphasis to one input of the addition means 13, while the color signal reproduction processing means 12 performs high frequency conversion. A reproduced color signal obtained by shifting the phase of the signal by 1H in the reverse order of recording is supplied to the other input of the adding means 13. Then, the adding means 13 multiplexes the reproduction luminance signal and the reproduction color signal to generate the output composite video signal bb.

Further, from the magnetic tape TT, the magnetic head C1
The control signal reproduced by using the is supplied to the control signal reproduction processing means 14 through the selecting means 8, and here, the reproduction control signal 14a is generated by performing waveform shaping or the like. Since the reproduction control signal 14a serves as a reference for the magnetic tape running speed during reproduction, it was supplied to a reproduction servo system (not shown). It is also supplied to the decoder 15, where the reproduction control signal 14a is supplied.
Of the reproduction information signal 15a by determining the duty ratio of
This signal was supplied to a mechanism system (not shown) to control the magnetic tape cueing and the like.

Further, the case of rewriting only the information signal such as the cueing signal multiplexed in the control signal will be described with reference to FIG. A reproduction control signal 1 shown in FIG. 1A obtained by reproducing the recorded magnetic tape TT.
4a is supplied to the encoder 6 instead of the control signal 6b,
The recording control signal 6c obtained by changing the duty ratio of the reproduction control signal 14a is supplied to the selecting means 8. The selecting means 8 rewrites by supplying the recording control signal 6c amplified to a predetermined level to the magnetic head C1 only during the period when the signal shown in FIG. That is, the information signal is rewritten by changing the duty ratio by rewriting only the falling edge portion without changing the rising edge that is the reference of the reproduction servo system.

[0008]

However, the conventional method of multiplexing the information signal with the control signal and transmitting the same is VT.
There is a drawback that information signals cannot be output to the outside of R,
For example, when performing dubbing between VTRs, the information signal could not be rerecorded. Also, the transmission rate of the information signal that can be multiplexed with the control signal is extremely low.

However, the applicant of the present application filed a prior application (the Japanese patent application No. 1051 of 1993) on which the domestic priority claim of the present application was based.
No. 49), an information signal having a transmission rate of hundreds of tens of bits / frame is inserted on a predetermined line of a video signal to be recorded and recorded on a magnetic tape, and this information signal should be reproduced and output at the time of reproduction. We proposed a VTR that inserts and outputs a predetermined line of a video signal.

In the previously proposed VTR, it is necessary to use a rotary head arranged on a rotary drum to rewrite an information signal inserted in a predetermined line of a video signal to be recorded, so that the structure is complicated. There was a first drawback that

Further, in order to eliminate such a drawback, the above-mentioned conventional information signal transmission utilizing the duty ratio of the control signal is also used, and an information signal having a high probability of being rewritten such as a cue is inserted in the video signal. In order to facilitate rewriting by multiplexing not only the data recorded on the control signal but also the control signal, the information obtained from the control signal may not match the information obtained from the video signal during reproduction. The second drawback is that the rewritten information cannot be transmitted by simply outputting the information signal inserted in the recorded video signal.

Therefore, an object of the present invention is to provide a video signal magnetic recording apparatus and a video signal magnetic reproducing apparatus which can solve the above-mentioned first and second drawbacks.

[0013]

The present invention provides the following configurations in order to solve the above problems.

A recorded image obtained by separating a first information signal having first information and second information inserted in a predetermined line from an input video signal and subjecting the input video signal to a predetermined process. A video signal recording means for inserting the first information signal into a signal and recording it in a diagonal direction of the magnetic tape by using a rotary head; and a second signal having at least the first information related to the first information signal. A video signal magnetic recording device comprising: a control signal recording means for multiplexing an information signal with a control signal and recording the magnetic tape in a longitudinal direction of the magnetic tape by using a fixed head.

A recording video signal having a first information signal having first information and second information inserted therein is recorded in an oblique direction, and at least a second information signal having the first information is recorded. A video signal magnetic reproducing apparatus for reproducing a magnetic tape in which control signals formed by multiplexing are recorded in a longitudinal direction, wherein the reproduced recorded video signal is subjected to predetermined processing to generate a reproduced video signal. Means, a decoder for extracting the second information signal from the reproduced control signal, and the first information relating to the reproduced first information signal and the first information relating to the second information signal. And a reproduction information signal generating means for outputting a reproduction information signal by substituting the reproduction information signal and an output means for outputting the reproduction information signal by inserting the reproduction information signal into a predetermined line of the reproduction video signal. Magnetic reproducing device.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a waveform diagram of an information signal, FIG. 2 is a waveform diagram for explaining lines of an information signal inserted in an HD signal,
3 is a block diagram for explaining a main part of a video signal recording apparatus according to an embodiment of the present invention, FIG. 4 is a conceptual diagram for explaining the operation of a dividing means, FIG. 5 is a waveform diagram of a TCI signal,
FIG. 6 is a timing chart for explaining the modulation operation,
FIG. 7 is a waveform diagram of a TCI information signal, FIG. 8 is a tape pattern, and FIG. 9 is a block diagram for explaining a main part of a video signal reproducing apparatus according to an embodiment of the present invention. The same components as those in FIG. 10 described above are designated by the same reference numerals and the description thereof is omitted. Further, in the following description, the information signal 6a such as the cue of the program generated based on the operation of the operator described above is inserted into the second information signal 6a and a predetermined line of the HD signal described later, A signal having constant information will be referred to as a first information signal.

The present embodiment relates to a video signal recording / reproducing apparatus for recording / reproducing a high definition video signal, and here, an HD signal will be taken up and described as an example of the high definition video signal. Further, the HD signal which is the output signal of the video signal recording / reproducing apparatus according to the present embodiment has the first information signal in a predetermined line, and the HD signal in which this first information signal is inserted is The video signal recording / reproducing apparatus according to this embodiment uses an input signal. Therefore, the first information signal, the recording system, and finally the reproducing system will be described.

(First Information Signal) FIG. 1A shows a line of a first information signal inserted in a luminance signal (hereinafter, abbreviated as "Y signal") related to an HD signal. The contents of the first information signal are, as shown in FIG. 7C, a preamble signal (8 bits) for synchronizing clocks during reproduction, and a synchronization signal (8 bits) for identifying the start of data. , A data signal (56 bits) indicating the type of the video signal, a time code signal (3
2 bits), an error correction signal (16 bits) for error detection / correction during reproduction, and a level reference signal (8 bits equivalent) for managing the recording level. And
The normal level of the level reference signal is 50 IRE, and each bit of the other signals has 20 IRE set to "0" and 80 IR.
E corresponds to "1". The figure (B) is NTSC.
It is the line drawing of the 1st information signal inserted in the luminance signal concerning a signal.

The data signal is made up of 7 words in 8-bit units. The first word relates to the format of the video signal, and the aspect ratio information (for example, 16: 9,
4: 3), image display format information (eg, letterbox or normal identification), track format information (eg,
HD, NTSC, EDTV, etc.) and telecine information (for example, identification of the same frame).
In addition, the second word is the program I indicating the program number.
D information is stored. The third word is audio information (for example, identification of stereo, mono, bilingual, etc.), editing information (for example, identification of editing start, editing end, editing, etc.), correction signal information (for example, correction signal Presence / absence) and control signal information according to the gist of the present invention (for example, identification of duty ratio of control signal such as VISS, VASS). The fourth and fifth words are text information and represent character information and the like by a so-called closed caption method. The sixth and seventh words are spare words for ensuring future expandability.

The time code signal is composed of 4 words in 8-bit units. The first word is the frame number that is incremented by one frame, and the second word is "second".
, The third word represents “minutes”, and the fourth word represents “hours”.

Next, the line on which the first information signal is inserted will be described with reference to the waveform diagram of the HD signal shown in FIG.
The numbers shown in the figure represent line numbers.
The first line starts from the start of the vertical sync signal in the odd field.

Here, since the line in which the first information signal is to be inserted may be deleted by the high-definition device during the vertical blanking period including the vertical synchronizing signal and the horizontal synchronizing signal period, the first blank line is included in the effective scanning line. Since the first information signal is not a picture signal, the overscan characteristic of 8% to 10% is monitored for all scanning lines so that it is not displayed on the screen of the monitor. Have to consider.

Therefore, considering these points, the lines on which the first information signal is inserted are 41 to 66 lines, 532 to 557 lines, and 603 lines of the HD signal.
It becomes one line or a plurality of lines from 628 lines and 1095 lines to 1120 lines.

By the way, since the number of scanning lines that the monitor overscans actually varies for each device, the first information signal is applied to the scanning lines that are effective scanning lines and are unlikely to appear on the screen. Insertion is more desirable. In addition, in the HD signal of the studio standard,
The number of effective scanning lines is 1035, and the effective pattern period is 41 lines to 557 lines and 603 lines to 1120 lines. On the other hand, in the MUSE decoder output signal, there are 1032 effective scanning lines, and the effective picture period is 42 lines to 557 lines and 604 lines to 1119 lines.

Therefore, 41,557,603,1120
The lines and the lines 42, 604, 557, and 1119 are effective scanning lines, and are lines that satisfy the above conditions that are unlikely to appear on the screen. Therefore, 41, 42,
It is desirable to insert the first information signal in one line or a plurality of lines out of the 557, 603, 604, 1119, and 1120 lines.

Further, the 41st line and the 603th line are effective scanning lines of HD signals of the studio standard, and M
This is a line which is not an effective scanning line of the USE decoder output signal. Therefore, assuming that the HD signal is not encoded into the MUSE signal, it is desirable to interpose the first information signal on the 41st line and / or the 603th line.

Therefore, the video signal magnetic recording / reproducing apparatus according to the present embodiment outputs the first information signal by inserting it into the 603 line of the HD signal, and considering the MUSE decoder output signal as the input HD signal, the 603 line or It is assumed that the first information signal is inserted on line 604.

(Recording System) To explain the recording system of the video signal recording / reproducing apparatus for recording / reproducing HD signals with reference to FIG. 3, first the video signal recording system will be explained, and then the control signal recording system will be explained. To do. Since the recording system and the reproducing system will be described separately, the configurations corresponding to the selecting means 5 and 8 in FIG. 10 will be omitted.

In the figure, an input Y is input from a transmission line (not shown).
Signal cc (luminance signal) and input PB, PR signals dd, ee
The (color signal) is split by means of an A / D converter (not shown).
6 is supplied. Here, the input Y, PB, and PR signals are signals compliant with domestic high-definition signal standards, and are signals converted from R, G, and B signals by the following formula.

Y = 0.7154G + 0.0721B + 0.2125R PB = 0.5389 (-0.7154G + 0.9279B-0.2125R) PR = 0.6349 (-0.7154G-0.0721B + 0.7875R) This dividing means 16 determines the predetermined Y signal cc. The amplitude level of the input signal is corrected based on the level reference signal in the first information signal inserted in the line. Specifically, when the level reference signal is inserted in the 603 line, this is given the highest priority, and the level reference signal is not inserted in the 603 line and the level reference signal is inserted in the 604 line. If the level reference signal is used,
When the level reference signal is not inserted in any of the 3rd line and the 604th line, the level is corrected based on the amplitude level of the horizontal synchronizing signal.

Then, the input Y, PB and PR signals cc, dd and ee having the normal amplitude level are divided into two systems. This division processing will be described with reference to FIG. 4, in which the input Y, PB, PR signals cc, dd, ee shown in the upper left of FIG.
The number of effective scanning lines of the MUSE signal (1032) obtained by deleting the synchronizing signal and the lines relating to the upper and lower sides of the screen from the (HD signal)
This signal is generated, and this signal is divided into the signals of the two systems shown in the lower left and lower right of the figure, and the first Y, PR signals 16a and 16b related to the even lines and the odd lines are divided. The second Y and PB signals 16c and 16d are obtained.
It should be noted that the PR signal for the odd line and the PB for the even line
Although these signals have been deleted, since these signals have a high line correlation, they are subjected to line-sequential demodulation during reproduction.

The output signal of the dividing means 16 has high frequency components in the time axis direction and the vertical direction emphasized by an emphasis means (not shown), and then is output to the first and second TCI converting means 17 and 18, respectively. Supplied.

Then, the first TCI conversion means 17 compresses the first Y and PR signals 16a and 16b by 1H for each time axis, and time-division-multiplexes the obtained first TCI signal 17a. No. 1 selection means 19 is supplied. Similarly, the second TCI conversion means 18 uses the second Y, PB signal 16
a and 16d are time-axis compressed for each 1H, and the second TCI signal 18a obtained by time division multiplexing is supplied to the second selecting means 20.

Then, the first and second selecting means 19, 20
Is the first and second TCI signals 17a and 18a related to the design.
Then, a TCI information signal 21a, a correction signal 22a, and a blanking signal 23a, which will be described later, are selected to generate first and second recording signals 19a and 20a shown in FIG. That is, the first and second TCI signals 17a and 18a are selected in the period T1 shown in the figure, the blanking signal 23a is selected in the period T2, and the TCI information signal 21a is selected in the period T3.
Is selected, and the correction signal 22a is selected in the period T4. The signal shown by "SW" in FIG. 5 is a switching signal that secures a margin for switching the magnetic head, and the signal shown by "V" is a vertical synchronization signal.
The signal shown by "DA" is the TCI information signal 21a, and the signal shown by "CAL" is the correction signal 22a.

The recording information signal generating means 21 for generating the TCI information signal 21a will now be described. To the recording information signal generating means 21, the A / D converted input Y signal cc is supplied to one input, 603 lines or 604
The first information signal inserted in the line is extracted, the first information signal is identified using a predetermined level (for example, the maximum level of the horizontal synchronizing signal) as a threshold, and processing such as error correction / detection is performed. It The second information signal 6 is input to the other input.
a is supplied, and a part of the first information signal that has been subjected to the above processing is appropriately changed by the second information signal 6a. Specifically, when the cueing information is newly added while recording the program, the control signal information in the data signal forming the first information signal is determined by the cueing information represented by the second information signal 6a. Is being rewritten. That is, when the information represented by the first and second information signals overlaps, the first information signal is changed. Therefore, if there is no new information to be added, no change is made.

The first information signal appropriately changed in this way is subjected to special modulation after a new error correction signal is added. This modulation reduces a spike level immediately after an edge generated as a result of emphasizing a high frequency component by horizontal emphasis means 24 and 25, which will be described later, by converting a signal represented by two values into three values, The limiter level that is limited by the limiter means 26 and 27 that prevents overmodulation is not exceeded. As will be specifically described with reference to FIG. 6, FIG. 6A shows a clock signal, and 6 cycles thereof correspond to 1 bit of the signal shown in FIG. Then, as shown in FIG. 7C, in the case where the signal changes from "1" to "0" and the bit is currently "0", each clock signal is sampled.
50,20,20,20,20,20IRE, 20,20,2 for each clock signal sample when "0" bits continue.
The signal changes from "0" to "1" so that it becomes 0,20,20,20IRE.
To become 50,80,80,80,80,80IRE for each sample of the clock signal when the bit is currently "1".
When the bits of "1" are continuous, modulation is performed so as to be 80,80,80,80,80,80IRE for each sample of the clock signal.
The modulated signal is a horizontal emphasis means 24, which will be described later.
At the output of 25, the signal shown in FIG. 6D is obtained, and since it does not exceed the limiter level, the limiter means 26,
No edge information is lost at 27. The signal thus modulated is supplied to the first and second selecting means 19 and 20 as the TCI information signal 21a. The TCI information signal 21a is compressed at the same compression ratio as the Y signal and becomes the signal shown in FIG.

Next, the correction signal generating means 22 for generating the correction signal 22a is composed of a plurality of ROMs and the like.
Different types of correction signals stored in the respective ROMs are sequentially selected and output for each frame. This correction signal contains
For example, a ramp signal for correcting linearity between the two systems, a grayscale signal for adjusting DC level and amplitude level between the two systems, a multi-burst signal for correcting frequency characteristics between the two systems, 2 A signal such as a 2T pulse signal (the half width of which corresponds to the cycle of the frequency corresponding to 1/2 of the band in the form of the SIN2 power) for correcting the phase characteristic between the systems is prepared.

The blanking signal generating means 23 is also R
A blanking signal 23a, which is composed of an OM or the like, and is composed of the above-mentioned switching signal and vertical synchronizing signal
(Interpolated during period T2 in FIG. 5) is output.

Then, as described above, the first and second selecting means 19 and 20 have the first and second TCI signals 17a and 18a, the TCI information signal 21a and the correction signal 2 relating to the picture.
2a and blanking signal 23a are appropriately selected to obtain the first and second recorded video signals 19a and 20a, which are not shown in D /
It is supplied to the horizontal emphasis means 24 and 25 via the A converter, respectively.

The horizontal emphasis means 24, 25 emphasize the high frequency components in the horizontal direction. Then, the output signals of the horizontal emphasis means 24 and 25 are limited in amplitude by the limiter means 26 and 27, and then the signals which can be modulated by the FM modulation means 28 and 29 by a predetermined deviation are stored in a recording amplifier (not shown). Amplified to a predetermined level and recorded on the magnetic tape TT via the magnetic heads A1 and A2 and the magnetic heads B1 and B2, respectively.

Here, the tape pattern of the magnetic tape TT will be described with reference to FIG. The numbers in the figure represent line numbers, "SW" is a switching signal, "V" is a vertical synchronizing signal, "CAL" is a correction signal, and "DA" is a TCI information signal. Each one is represented.

Then, the first recording video signal 17a for the even-numbered lines is output from "SW" to "556 (1) shown in FIG. 8A by using the magnetic head A1 arranged on the rotating drum. / 2) ”and the magnetic head A2 is used to record the track“ 5 ”shown in FIG. 8 (A).
It is recorded on the tracks from "56 (1/2)" to "1118". On the other hand, the second recorded video signal 18a relating to the odd-numbered line is the magnetic head B arranged on the rotating drum.
1 to “55” to “55” shown in FIG.
7 (1/2) ”, and the magnetic head B2 was used to record“ 557 ”illustrated in FIG. 8 (A).
(1/2) ”to“ 1119 ”are recorded. Further, the magnetic heads A1,
B1 or magnetic heads A2 and B2 perform simultaneous recording,
Audio magnetic heads 3A and 3B preceding this (not shown)
Thus, audio tracks A and B in FIG. 8A are formed. Of course, the magnetic tape pattern shown in FIG. 8B can be obtained by appropriately setting the mounting heights of the magnetic heads A1, A2, B1, B2 and the audio magnetic heads 3A, 3B.

Now, in describing the recording system of the control signal, the third embodiment is different from the above-mentioned conventional technique.
Since the first information signal related to the input Y signal cc is supplied to the encoder 6 via the selecting means 30 of 1., this difference will be described and the other description will be omitted.

The third selecting means 30 has a structure for selecting, based on the operator's intention, whether or not to record the control information inserted in the input Y signal cc in a multiplexed manner with the control signal. When the cueing information is to be additionally written after the magnetic tape is recorded, the third selecting means 30 is opened and the information is recorded without being multiplexed with the control signal, while the input Y signal is recorded. When the control information inserted in cc is multiplexed with the control signal and recorded, the third selecting means 30 may be put in the connected state.

In this way, it is possible to record the control signal in which the cue information and the like are multiplexed on the control track on the magnetic tape based on the operator's intention.
When the control information related to the first information signal is the first information and the other information is the second information, it goes without saying that the information multiplexed on the control signal is not limited to the first information. , The second information signal having at least the first information may be used.

(Reproduction System) The reproduction system will be described with reference to FIG. In the figure, the signals reproduced from the magnetic tape TT by using the magnetic heads A1 and A2 and the magnetic heads B1 and B2 are amplified to a predetermined level by a preamplifier (not shown), and then the FM demodulation means 30 and 31. FM demodulation is performed. Then, the output signal is the horizontal emphasis means 2
After the horizontal high-frequency components are attenuated by the horizontal de-emphasis means 32 and 33, which have a complementary relationship with 4, 25, the first and the first obtained through an A / D converter (not shown). The two reproduced signals 32a and 33a are supplied to the correction means 34 and 35.

The correction means 34 and 35 are provided for the correction signal 2 described above.
The first and second reproduction signals 32a, 33 according to the type of 2a
The signal obtained by correcting a is supplied to the first and second TCI inverse conversion means 36 and 37.

The first and second TCI inverse conversion means 36,
37 is the above-mentioned first and second TCI conversion means 17, 18
And the compressed luminance signal and the compressed line-sequential chrominance signal are expanded on the time axis to obtain the first reproduction Y and PR signals 36.
a, 36b and the second reproduced Y, PB signals 37a, 37b, and a combining means 38 via de-emphasis means (not shown) for attenuating the high frequency components in the vertical direction and the time axis direction of these signals. Is being supplied to.

Then, the synthesizing means 38 rearranges the first and second reproduced Y signals 36a and 37a in the line order to generate a Y signal, and the first reproduced PR signal 36b is subjected to line-sequential demodulation to obtain the PR signal. Is generated, and the second PB signal 37b is subjected to line-sequential demodulation to generate a PB signal. This PR, PB
The signal is output to a transmission line (not shown) as outputs PR and PB signals ff and gg via a D / A converter (not shown). On the other hand, the Y signal is supplied to the fourth selection means 40, where 6
An output Y signal hh obtained by inserting a first reproduction information signal 39a, which will be described later, into line 03 is output to a transmission line (not shown) via a D / A converter (not shown).

Now, the reproduction information signal generating means 39 for generating the first reproduction information signal 39a will be described.
The reproduction information signal generation means 39 is supplied with the output signal of the horizontal de-emphasis means 32, and the discrimination between "0" and "1" of the reproduced TCI information signal 21a relating to this output signal is performed in the above-mentioned FIG. The level of the period t2 or t3 is held, this level is used as a threshold, and the level reference signal is obtained with its level information and an information signal whose time axis is extended is generated. On the other hand, the decoder 1
The second reproduction information signal 15a is supplied from 5, and the predetermined information of the information signal is rewritten using the information represented by the second reproduction information signal 15a. That is, the TCI information signal 21a and the second reproduction information signal 15a inserted in the video signal
Second reproduction information signal 1 if the information represented by
The information represented by 5a is prioritized.

As a result, even when the information multiplexed on the control signal such as the cue information is rewritten on the recorded magnetic tape TT, the information is inserted into a predetermined line of the video signal. Can be output.

Further, according to the recording / reproducing apparatus of the present embodiment, even when the HD signal in which the information signal is inserted in the 603 line is recorded, 10 of the HD signal scanning lines are recorded.
There is an effect that an information signal can be recorded on a magnetic tape despite recording only 32 lines, and when reproducing this magnetic tape, an HD signal obtained by inserting the information signal into 603 lines can be output. Therefore, there is an effect that the amplitude level can be easily managed by the high-definition device in the subsequent stage.

Although the output signal of the de-emphasis means is supplied to the input of the reproduction information signal generating means in the above-mentioned embodiment, instead of this, the output signal of the correcting means is input to the reproduction information signal generating means. Of course, the signal after correction can be used in this case, so that malfunction can be improved.

In the above-mentioned embodiment, the video signal recording / reproducing apparatus is a VTR using a magnetic tape as a recording medium.
However, the present invention is not limited to this,
The recording medium may be a disc-shaped optical disk, a floppy disk, or the like, or may be a semiconductor memory, as a matter of course.

Although the video signal recording / reproducing apparatus has been described in the above embodiments, the video signal recording apparatus according to the present invention may have at least a recording system. At least a reproduction system is required.

[0056]

As described above, according to the structure of the video signal magnetic recording apparatus of the present invention, in particular, the first video signal is recorded.
Video signal recording means for recording the information signal in the oblique direction of the magnetic tape by using a rotary head and reproducing the second information signal having at least the first information related to the first information signal. Since it has a control signal recording means for multiplexing in a control signal serving as a reference of the servo system at the time and recording in the longitudinal direction of the magnetic tape by using a fixed head, there is a possibility of rewriting the recorded magnetic tape. Since the high first information is not only inserted and recorded in the recording video signal but also multiplexed in the control signal, there is an effect that a magnetic tape on which the first information is easily rewritable can be generated.

Further, as described above, according to the configuration of the video signal magnetic reproducing apparatus according to the present invention, in particular, the reproduced second signal is reproduced.
Reproduction information signal generating means for replacing the first information related to the information signal with the first information related to the first information signal and outputting a reproduction information signal, and the reproduction information on a predetermined line of the reproduced video signal. Since it has an output means for inserting and outputting a signal,
Even if the first information multiplexed in the control signal is rewritten on the recorded magnetic tape, the rewritten first information can be preferentially output.

[Brief description of drawings]

FIG. 1 is a waveform diagram of a first information signal.

FIG. 2 is a waveform diagram for explaining a line of a first information signal inserted in an HD signal.

FIG. 3 is a block diagram illustrating a main part of a video signal recording device according to an embodiment of the present invention.

FIG. 4 is a conceptual diagram for explaining the operation of the dividing unit.

FIG. 5 is a waveform diagram of a TCI signal.

FIG. 6 is a timing chart for explaining a modulation operation.

FIG. 7 is a waveform diagram of a TCI information signal.

FIG. 8 is a tape pattern.

FIG. 9 is a block diagram illustrating a main part of a video signal reproducing device according to an embodiment of the present invention.

FIG. 10 is a block diagram for explaining a conventional video signal magnetic recording / reproducing apparatus.

FIG. 11 is a timing chart for explaining a control signal rewriting operation.

[Explanation of symbols]

6 encoder (control signal recording means) 7 control signal recording processing means (control signal recording means) 15 decoder 16 dividing means (video signal recording means) 17, 18 first and second TCI conversion means (video signal recording means) 19 , 20 first and second selecting means (video signal recording means) 24, 25 horizontal emphasis means (video signal recording means) 26, 27 limiter means (video signal recording means) 28, 29 modulation means (video signal recording means) 30, 31 Demodulation means (video signal reproduction means) 32, 33 Horizontal de-emphasis means (video signal reproduction means) 34, 35 Correction means (video signal reproduction means) 36, 37 First and second TCI inverse conversion means (video) Signal reproducing means) 38 synthesizing means (video signal reproducing means) 39 reproduction information signal generating means 40 fourth selecting means (output Means) 6a Second information signal 17a, 18a First and second recorded video signal (recorded video signal) 39a Reproduction information signal cc Input Y signal (input video signal) A1, A2, B1, B2 Magnetic head (rotary head) ) C1 magnetic head (fixed head) TT magnetic tape

Claims (2)

[Claims] 1. A first information signal having first information and second information inserted on a predetermined line can be separated from an input video signal, and the predetermined processing can be applied to the input video signal. A video signal recording means for inserting the first information signal into a recording video signal and recording it in a diagonal direction of the magnetic tape by using a rotary head; and a first signal having at least the first information related to the first information signal. 2. A video signal magnetic recording device, comprising: a control signal recording means for multiplexing the two information signals with a control signal and recording the same in the longitudinal direction of the magnetic tape by using a fixed head. 2. A recording video signal having a first information signal having first information and second information inserted therein is obliquely recorded, and second information having at least the first information. A video signal magnetic reproducing apparatus for reproducing a magnetic tape in which a control signal formed by multiplexing signals is recorded in the longitudinal direction, wherein the reproduced recorded video signal is subjected to predetermined processing to generate a reproduced video signal. Signal reproduction means, a decoder for extracting the second information signal from the reproduced control signal, the first information relating to the reproduced first information signal, and the second information signal relating to the second information signal. A reproduction information signal generating means for replacing the first information with the reproduction information signal and outputting the reproduction information signal; and an output means for outputting the reproduction information signal by inserting the reproduction information signal into a predetermined line of the reproduction video signal. Video signal magnetic reproducing device.