JP2939964B2 - Video signal recording device and video signal reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art The present applicant records an image signal by applying emphasis to a time axis direction, a vertical direction, and a horizontal direction in this order.
At the time of reproduction, an emphasis method and a de-emphasis method in which the S / N of a reproduced video signal is improved by applying de-emphasis in the reverse order have been previously proposed (Japanese Patent Application No. Hei 4-3).
No. 59260, unpublished at the time of filing the present application).

Here, the emphasis / de-emphasis in the time axis direction is to improve the S / N by using the correlation of the video signal between a plurality of frames. The high frequency components of the video signal relating to the current frame are emphasized by comparing them with the low frequency components based on the signals (emphasis of uncorrelated signal components). The high frequency components of the video signal relating to the current line are emphasized in comparison with the low frequency components based on the video signal between lines. On the other hand, de-emphasis in the time axis direction reduces the high frequency component of the video signal related to the current frame based on the video signal of a plurality of past frames in comparison with the low frequency component (a signal having no correlation). Component decrement), and vertical de-emphasis reduces the high-frequency component of the video signal of the current line based on the video signal of a plurality of past lines in comparison with the low-frequency component (correlation). (Reduction of signal components having no characteristic).

[0004]

On the other hand, in order to record a high-definition video signal such as a Hi-Vision signal (1125 scanning lines) having a wider band and a larger number of scanning lines than a conventional video signal, two systems are used. In some cases, it is necessary to divide and record, but in such a case, it is necessary to add a correction signal to the recording signal and record it in order to correct the transmission characteristics of both systems. Further, there is a case where it is desired to record an information signal inserted in the video signal.
These correction signals and information signals are recorded by being inserted in a vertical blanking period other than the picture period.

However, since the correction signal and the information signal have no correlation in the time axis direction or the vertical direction, when the emphasis / deemphasis in the time axis direction or the vertical direction is performed during the vertical blanking period, the high frequency components are reduced. There is a drawback that the signal is overemphasized, exceeds the dynamic range of the transmission path (the band when performing FM modulation), and the signal is not transmitted accurately.

Accordingly, an object of the present invention is to provide a video signal recording device and a video signal reproducing device which solve the above problems.

[0007]

SUMMARY OF THE INVENTION The present invention provides the following structure to solve the above problems.

A video signal recording apparatus for recording a video signal in which an information signal is inserted in a predetermined line, wherein the upper and lower lines including the predetermined line related to the video signal are deleted and divided into two systems. Dividing means, a time axis emphasis means for enhancing a high frequency component in a time axis direction related to an output signal of the dividing means by comparing it with a low frequency component, and a vertical direction related to an output signal of the time axis emphasis means. A vertical emphasis means for emphasizing a high frequency component by comparing it with a low frequency component, and a TCI signal obtained by time axis multiplexing and time axis multiplexing a luminance signal and a color signal relating to an output signal of the vertical emphasis means. TCI converting means for outputting, TCI information signal generating means for performing a predetermined change to the information signal separated from the video signal to generate a TCI information signal, and correction for correcting transmission characteristics And correction signal generating means for generating a No.,
A video signal recording device having at least a recording unit for recording a recording signal including at least the TCI signal, the TCI information signal, and the correction signal on a recording medium.

A video signal recording apparatus for recording a video signal in which an information signal is interposed in a predetermined line, wherein upper and lower lines including the predetermined line related to the video signal are deleted and divided into two systems. Dividing means, a time axis emphasis means for enhancing a high frequency component in a time axis direction related to an output signal of the dividing means by comparing it with a low frequency component, and a vertical direction related to an output signal of the time axis emphasis means. A vertical emphasis means for emphasizing a high frequency component by comparing it with a low frequency component, and a TCI signal obtained by time axis multiplexing and time axis multiplexing a luminance signal and a color signal relating to an output signal of the vertical emphasis means. TCI converting means for outputting, TCI information signal generating means for performing a predetermined change to the information signal separated from the video signal to generate a TCI information signal, and correction for correcting transmission characteristics And correction signal generating means for generating a No.,
Horizontal emphasis means for enhancing a horizontal high-frequency component of a recording signal comprising at least the TCI signal, the TCI information signal and the correction signal by comparing it with a low-frequency component, and an output of the horizontal emphasis means A video signal recording apparatus comprising: a limiter for limiting an amplitude level of a signal; and a recorder for performing FM modulation on an output signal of the limiter and recording the signal on a recording medium.

A video signal reproducing apparatus for reproducing a recording medium according to claim 1, wherein said reproducing means reproduces said recording signal from said recording medium, and said reproducing means reproduces said recording signal based on said reproduced correction signal. Correction means for correcting the transmission characteristic of the output signal; information signal generation means for generating an information signal based on the TCI information signal of the output signal of the correction means; and the TCI signal of the output signal of the correction means TC that extends the time axis of, and separates into a luminance signal and a chrominance signal
I inverse transform means, vertical de-emphasis means for attenuating a high frequency component in the vertical direction of the luminance signal and the color signal in comparison with low frequency components, and an output signal of the vertical de-emphasis means. A time axis de-emphasis means for attenuating a high frequency component in the time axis direction by comparing it with a low frequency component, and an output signal of the time axis de-emphasis means are synthesized, and the information signal is inserted into a predetermined line and output. An output video signal generating means for generating a video signal.

3. A video signal reproducing apparatus for reproducing a recording medium according to claim 2, wherein said reproducing means reproduces said recording signal from said recording medium and performs FM demodulation; Horizontal de-emphasis means for attenuating the high-frequency component of the low-frequency component compared with the low-frequency component, and based on the correction signal according to the output signal of the horizontal de-emphasis means, the transmission characteristic of the output signal of the reproduction means. A correcting means for correcting, an information signal generating means for generating an information signal based on the TCI information signal related to an output signal of the correcting means, and a time axis of the TCI signal related to the output signal of the correcting means. TCI inverse conversion means for separating a luminance signal and a chrominance signal, and a vertical attenuator for attenuating a high frequency component in a vertical direction related to the luminance signal and the chrominance signal in comparison with a low frequency component. De-emphasis means, time-axis de-emphasis means for attenuating a high-frequency component in the time-axis direction related to an output signal of the vertical de-emphasis means in comparison with low-frequency components, and an output signal of the time-axis de-emphasis means And an output video signal generating means for generating an output video signal by interposing the information signal on a predetermined line.

[0012]

FIG. 1 is a waveform diagram of an information signal, FIG. 2 is a waveform diagram for explaining a line of an information signal inserted into an HD signal,
FIG. 3 is a block diagram for explaining a main part of the video signal recording apparatus according to one embodiment of the present invention, FIG. 4 is a conceptual diagram for explaining the operation of the dividing means, FIG. 5 is a waveform diagram of a TCI signal,
6 is a timing chart for explaining the operation of the modulating means, FIG. 7 is a waveform diagram of the TCI information signal, FIG. 8 is a tape pattern, and FIG. 9 is a main part of the video signal reproducing apparatus according to one embodiment of the present invention. It is a block diagram for explaining.

This embodiment relates to a video signal recording / reproducing apparatus for recording / reproducing a high-definition video signal. Here, an HD signal will be described as an example of a high-definition video signal. The HD signal, which is an output signal of the video signal recording / reproducing apparatus according to the present embodiment, has an information signal on a predetermined line. The signal recording / reproducing device is used as an input signal. Therefore, the information signal will be described first, then the recording system, and finally the reproduction system.

(Information Signal) FIG. 1A shows lines of an information signal inserted into a luminance signal (hereinafter abbreviated as "Y signal") relating to an HD signal. The contents of the information signal include a preamble signal (8 bits) for synchronizing clocks during reproduction, as shown in FIG.
A synchronization signal (8 bits) for identifying the start of data,
To manage a data signal (56 bits) representing the type of video signal, a time code signal (32 bits) representing time information, an error correction signal (16 bits) for performing error detection and correction during reproduction, and a recording level. (Referenced to 8 bits). The normal level of the level reference signal is 50 IRE, and the bits of the other signals correspond to “0” for 20 IRE and “1” for 80 IRE. FIG. 2B is a line diagram of an information signal inserted into a luminance signal related to the NTSC signal.

The data signal is composed of 7 words in units of 8 bits. The first word relates to the format of the video signal and includes aspect ratio information (for example, 16: 9,
4: 3 identification), image display format information (for example, letterbox or normal identification), and track format information (for example,
HD, NTSC, EDTV, etc.) and telecine information (for example, identification of the same frame).
The second word is a program I representing a program number.
D information is stored. The third word includes audio information (for example, identification of stereo, mono, bilingual, etc.), editing information (for example, identification of editing start, editing end, editing, etc.), and correction signal information (for example, correction signal ), And control signal information (for example, identification of the duty ratio of a control signal such as VISS or VASS). The fourth and fifth words are text information and represent character information or 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 units of 8 bits. The first word is a frame number incremented by one frame, and the second word is “second”.
, The third word represents “minute”, and the fourth word represents “hour”.

Next, the line on which the information signal is inserted is shown in FIG.
This 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, and the first line starts from the start of the vertical synchronization signal of the odd field.

Here, the line on which the information signal is to be inserted is:
Since the vertical blanking period and the horizontal synchronization signal period including the vertical synchronization signal may be deleted by the Hi-Vision device, it is necessary to insert a level standard signal in the effective scanning line, and since the information signal is not a picture signal, 8% to 1% of all scanning lines so as not to be displayed on the monitor screen
It is necessary to consider that the monitor has an overscan characteristic of 0%.

In consideration of these points, the lines on which the information signal is inserted are 41 lines to 66 lines of the HD signal.
Line, 532-557 line, 603 line-628
One line or a plurality of lines among the lines and 1095 lines to 1120 lines. By the way, since the number of scanning lines that the monitor actually overscans varies for each device, it is more effective to insert an information signal into a scanning line that is an effective scanning line and has a low possibility of appearing on the screen. desirable. In a studio standard HD signal, the number of effective scanning lines is 1,035, and the effective picture period is 41 to 557 lines and 603 to 112 lines.
0 line. On the other hand, in the MUSE decoder output signal, there are 1032 effective scanning lines, and the effective picture period is 42 to 557 lines and 604 to 1119.
Line.

Therefore, 41,557,603,1120
The line and the 42, 604, 557, and 1119 lines are effective scanning lines, and are lines satisfying the above-described conditions that are unlikely to appear on the screen. Therefore, 41, 42,
It is desirable to insert the information signal into one or more of the 557, 603, 604, 1119, and 1120 lines.

Further, 41 lines and 603 lines are effective scanning lines of the HD signal of the studio standard, and
This is a line that 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 insert the information signal into 41 lines and / or 603 lines.

Therefore, the video signal magnetic recording / reproducing apparatus according to this embodiment inserts an information signal into the 603 line of the HD signal and outputs the signal. The input HD signal is changed to the 603 line or the 604 line in consideration of the output signal of the MUSE decoder. It is assumed that an information signal is inserted.

(Recording system) Referring to FIG.
A recording system of a video signal recording / reproducing apparatus for recording / reproducing an SC signal will be described. In the figure, an input Y is transmitted from a transmission line (not shown).
Signal aa (luminance signal) and input PB, PR signals bb, cc
(Color signal) are supplied to the AGC means 1 to 3, respectively. Here, the input Y, PB, and PR signals are signals compliant with the domestic Hi-Vision signal standard.
This is a signal converted from the B signal.

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) And the above AGC means 1 to 3 perform A / D conversion. The amplitude level of each signal is corrected based on the level reference signal in the information signal relating to the output signal 4a of the output unit 4; if the level reference signal is inserted in the 603 line, this is given the highest priority; When the level reference signal is not inserted in the line 603 and the level reference signal is inserted in the line 604, the level reference signal is used, and the lines 603 and 60 are used.
If no level reference signal is inserted in any of the four lines, the level is corrected based on the amplitude level of the horizontal synchronization signal.

Then, the input Y, PB, PR signals aa, bb, and cc having the normal amplitude levels are converted into A / D converters 4.
To the dividing means 7 through. This dividing means 7 is an A / D converter for input Y, PB, PR signals aa, bb, cc.
It plays the role of dividing the output signals of the converters 4 to 6 into two systems. This division processing will be described with reference to FIG. 4. The input Y, PB, PR signals aa, bb, cc shown at the upper left in FIG.
(HD signal), the number of effective scanning lines of the MUSE signal (1032
This signal is divided into two signals shown in the lower left and lower right parts of the figure, and is divided into first Y and PR signals 7b and 7a for even lines and odd lines. The second Y and PB signals 7c and 7d are obtained. Although the PR signal for the odd-numbered line and the PB signal for the even-numbered line have been deleted, since these signals have high line correlation, they are subjected to line-sequential demodulation during reproduction.

The output signal of the dividing means 7 is supplied to time axis emphasis means 8 to 10, where the high frequency components in the time axis direction are emphasized based on signals of a plurality of past frames. However, the time axis emphasis means 8 to 10
Is controlled by an editing information signal 19b for identifying the start of editing, the end of editing, and the editing in progress, and the processing of the video signal after the editing point is performed ignoring the video signal of a plurality of frames before the editing point which is a past frame.

Then, the first PR signal 7a and the second PB
The output signals 8a and 11a of the time axis emphasis means 8 and 11 relating to the signal 7d are first and second TCI conversion means 15 and 16 via vertical emphasis means 12 and 14 for emphasizing high frequency components in the vertical direction. Supplied to

On the other hand, the output signals 9a, 1 of the time axis emphasis means 9, 10 relating to the first and second Y signals 7b, 7c.
0a is supplied to the vertical emphasis means 13, where both input signals are rearranged in line order and integrated, and the signal obtained by emphasizing the high frequency components in the vertical direction is again divided into even lines and odd lines. To the first and second TCI conversion means 15 and 16, respectively.

Then, the first and second TCI processing means 1
Reference numerals 5, 16 denote first and second TCI signals 15a, 15a,
16a is supplied to first and second selecting means 17 and 18, respectively.

Then, the first and second selecting means 17 and 18
Are the first and second TCI signals 15a and 16a
And a TCI information signal 19a, a correction signal 20a, and a blanking signal 21a, which will be described later, to generate first and second recording signals 17a and 18a shown in FIG. That is, the first and second TCI signals 15a and 16a are selected in the period T1 shown in FIG. 3, the blanking signal 21a is selected in the period T2, and the TCI information signal 19a is selected in the period T3.
Is selected, and the correction signal 20a is selected in the period T4. In FIG. 5, a signal indicated by "SW" is a switching signal for securing a margin for switching the magnetic head, a signal indicated by "V" is a vertical synchronization signal,
The signal indicated by “DA” is a TCI information signal, and “C”
The signal indicated by “AL” is a correction signal. In this way, the selecting means 15 and 16 are changed to the first and second TCI converting means 15 and
The signals provided after 16 are not correlated in the time axis direction and the vertical direction, such as the TCI information signal 19a and the correction signal 20a, except for the signal period, so that emphasis in the time axis direction and the vertical direction is excessive. This is because information may be lost by a limiter at the subsequent stage due to emphasis on a high frequency component.

Here, the recording information signal generating means 19 for generating the TCI information signal 19a will be described. The recording information signal generating means 19 includes an output signal 4 of the A / D converter 4.
After the information signal and the editing information signal 19b are supplied, the information signal is identified using the predetermined level (for example, the maximum level of the horizontal synchronizing signal) as a threshold, and the information signal is subjected to processing such as error correction and detection. The rewriting of the editing information inserted in the third word in the data signal is performed based on the newly supplied editing information signal 19b. The program ID information, time code information, correction signal information, and the like are also replaced with new information if they are changed. After a new error correction signal is added, special modulation is performed.

This modulation converts the signal represented by the binary value to 3
By converting into a value, a spike level immediately after an edge generated as a result of emphasizing high frequency components in horizontal emphasis means 24 and 25 described later is reduced, and limited by limiter means 26 and 27 for preventing overmodulation. This does not exceed the limiter level. FIG. 6A specifically shows a clock signal, with six periods corresponding to one bit of the signal shown in FIG. 6B. Then, the signal changes from "1" to "0" as shown in FIG.
, 50,20,
If bits of “0” are continuous so as to be 20,20,20,20IRE, 20,20,20,20,2
If the signal changes from "0" to "1" so that it becomes "1" so that it becomes 0,20IRE, it becomes 50,80,80,80,80,80, IRE for each sample of the clock signal. As described above, when the bits of “1” are continuous, every sample of the clock signal
Modulation is performed so as to be 80,80,80,80,80,80IRE. The modulated signal becomes the signal shown in FIG. 3D at the output of the horizontal emphasis means 24 and 25 described later, and does not exceed the limiter level, so that the edge information is lost by the limiter means 26 and 27. There is no. The signal thus modulated is used as the TCI information signal 19a as the first and second signals.
Are supplied to the selecting means 17 and 18.

Next, the correction signal generating means 20 for generating the correction signal 20a is constituted by a plurality of ROMs and the like.
Different types of correction signals stored in respective ROMs are sequentially selected and output for each frame. This correction signal includes
For example, a ramp signal for correcting linearity between two systems, a gray scale signal for adjusting a DC level and an amplitude level between two systems, a multi-burst signal for correcting frequency characteristics between two systems, A signal such as a 2T pulse signal (in the form of SIN square whose half-value width matches a cycle of a frequency corresponding to 帯 域 of the band) for correcting the phase characteristic between the systems is prepared.

The blanking signal generating means 21 is also provided with R
OM or the like, and a blanking signal 21a composed of the above-described switching signal and vertical synchronization signal.
(Interpolated during period T2 in FIG. 5).

As described above, the first and second selecting means 17 and 18 provide the first and second TCI signals 15a and 16a, TCI information signal 19a and correction signal 2 for the picture.
0a and the blanking signal 21a are appropriately selected, and the first and second recording signals 17a and 18a obtained by the D / A converter 2
2 and 23 are supplied to horizontal emphasis means 24 and 25, respectively.

The horizontal emphasis means 24 and 25 emphasize high frequency components in the horizontal direction. After the output signals of the horizontal emphasis means 24 and 25 are limited in amplitude by limiter means 26 and 27, the signals obtained by performing modulation with predetermined deviation by FM modulation means 28 and 29 are sent to a recording amplifier (not shown). And 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 is represented.

The first recording signal 17a related to the even-numbered line is transmitted to the magnetic head A provided on the rotating drum.
1 using “SW” to “55” shown in FIG.
6 (1/2) ", and using the magnetic head A2," 556 "shown in FIG.
(1/2) ”to“ 1118 ”. On the other hand, the second recording signal 1 for the odd-numbered line
8A uses a magnetic head B1 disposed on a rotating drum, and switches from “SW” to “557 (1/1) shown in FIG.
2) "and the magnetic head B
2, “557 (1/1) shown in FIG.
2) ”to“ 1119 ”.
The magnetic heads A1 and B1 or the magnetic heads A2 and B2 disposed close to each other perform simultaneous recording, but the preceding audio magnetic heads 3A and 3B (not shown) perform recording in FIG. Audio tracks A and B are formed. still,
Magnetic heads A1, A2, B1, B2 and audio magnetic head 3
It is needless to say that the magnetic tape pattern shown in FIG. 8B can be obtained by appropriately setting the mounting height to A and 3B.

(Reproduction System) The reproduction system will be described with reference to FIG. In the figure, signals reproduced from the magnetic tape TT 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 FM demodulated means 30 and 31. FM demodulation is performed. Then, the output signal is supplied to the horizontal emphasis means 2.
After the high frequency components in the horizontal direction are attenuated by the horizontal de-emphasis means 32 and 33 having a complementary relationship to the first and fourth signals 25 and 25, the first and second signals obtained through the A / D converters 34 and 35 are obtained.
The second reproduction signals 34a and 35a are supplied to correction means 36 and 37.

The correction means 36 and 37 output the correction signal 2
The first and second reproduced signals 34a and 35a are corrected in accordance with an information signal 40a, which will be described later, representing the type of 0a.

The output signals of the correction means 36 and 37 are supplied to first and second TCI inverse conversion means 38 and 39. The output signal of the correction unit 37 is also supplied to the determination unit 40.

The discriminating means 40 determines whether the reproduced TCI
The discrimination between "0" and "1" of the information signal 20a is performed by holding the level of the period t2 or t3 in FIG. 7 described above and using this level as a threshold, and obtaining the level information of the level reference signal. At the same time, the time axis is extended to generate an information signal, which is supplied to the selection means 49. The selection means 49 inserts an information signal into the 603 line of the Y signal.

On the other hand, the first and second TCI inverse conversion means 3
8, 39 are the first and second TCI converting means 15,
16, the compressed luminance signal and the compressed line-sequential chrominance signal are time-axis-expanded to form a first reproduced Y, PR signal 3
8b, 38a and the second reproduced Y, PB signals 39b, 39a
And has generated.

Then, the first reproduced PR signal 38a and the second
The reproduced PB signal 39a and the vertical de-emphasis means 4
1 and 43 to reduce the high frequency components in the vertical direction, and then reduce the high frequency components in the time axis by the time axis de-emphasis means 44 and 47 to obtain signals 44 a and 4.
7a is supplied to the synthesizing means 48.

On the other hand, the first and second reproduced Y signals 38b, 3
9b, a vertical de-emphasis means 42 obtains a signal obtained by rearranging both input signals in line order, reducing high frequency components in the vertical direction, and dividing both signals into even lines and odd lines again. The signals 45a and 46a obtained by reducing the high frequency components in the time axis direction by the time axis deemphasis means 45 and 46 are supplied to the synthesizing means 48.

The above-mentioned time axis de-emphasis means 44 to 47 are controlled by the editing information relating to the information signal 40a, and the processing of the video signal after the editing point is performed in a plurality of frames before the editing point which is a past frame. This is performed while ignoring the video signal. Therefore, a high-quality video signal can be reproduced without inconveniences such as generation of an afterimage and blurring.
The above-mentioned vertical de-emphasis means 41 to 42 have a complementary relationship with the vertical emphasis means 12 to 14, respectively.
47 are complementary to the time axis emphasis means 8-11.

Then, the first and second reproduction Y
The signals 45a and 46a related to the signals 38b and 39b are rearranged in line order to generate a Y signal, and the first PR signal 38a
Is subjected to line-sequential demodulation on the signal 44a according to the above, to generate a PR signal, and the signal 47a related to the second PB signal 39a is subjected to line-sequential demodulation to generate a PB signal.

The PR and PB signals are supplied to D / A converters 50 and 51, respectively.
, And output PR and PB signals ee and ff to a transmission line (not shown). On the other hand, the Y signal is supplied to the selection means 49, where the output Y signal obtained by inserting the information signal 40a into the 603 line is output to a transmission line (not shown) via the D / A converter 52.

Further, according to the recording / reproducing apparatus of the present embodiment, even when recording an HD signal in which an information signal is inserted in 603 lines, 10 out of the scanning lines of the HD signal are used.
An information signal can be recorded on a magnetic tape in spite of recording only 32 lines. 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 management of the amplitude level and the like can be easily performed by the high-definition equipment at the subsequent stage.

In the above-described embodiment, the time-axis emphasis means and the time-axis de-emphasis means may be replaced by an example of a recording signal processing means and a reproduction signal processing means for performing image processing based on a video signal relating to a past frame or field. However, the present invention is intended to improve the inconvenience caused by the loss of continuity and correlation of the video signal at the edit point by returning the image processing immediately after the edit point to the initial state, so that the time axis It is needless to say that the present invention is not limited to the emphasis means and the time axis de-emphasis means. For example, the present invention may be applied to the compression / decompression processing of a video signal between frames or fields using orthogonal transformation or the like. is there.

In the above embodiment, the output signals of the correcting means 36 and 37 are used as the input signals of the determining means 40 in order to determine the information signal from the corrected signal. Of course, the output signal may be used as the input signal.

In the above-described 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, and the recording medium may be a disk-shaped optical disk, a floppy disk, or the like, or may be a semiconductor memory. .

In the above embodiment, the video signal recording / reproducing apparatus has been described. However, the video signal recording apparatus according to the present invention may have at least a recording system. What is necessary is just to have a reproduction system at least.

[0054]

As described above, according to the configuration of the video signal recording apparatus of the present invention, the dividing means for deleting upper and lower lines including predetermined lines related to the video signal and dividing the system into two systems, A time axis emphasis means for emphasizing a high frequency component in the time axis direction relative to the low frequency component of the output signal, and a high frequency component in the vertical direction according to the output signal of the time axis emphasis means in a low frequency band. A vertical emphasis means for emphasizing compared with a frequency component, and a TC for outputting a TCI signal obtained by time-axis-compressing and time-multiplexing a luminance signal and a chrominance signal relating to an output signal of the vertical emphasis means
I conversion means, TCI information signal generating means for performing a predetermined change to the information signal separated from the input video signal to generate a TCI information signal, and correction signal generating means for generating a correction signal for correcting transmission characteristics And recording means for recording a recording signal comprising at least the TCI signal, the TCI information signal, and the correction signal on a recording medium, so that the emphasis in the time axis direction and the vertical direction is reduced during the picture period in the video signal. The information signal and the correction signal having no correlation in the time axis direction and the vertical direction are not subjected to the emphasis in the time axis direction and the vertical direction. There is an effect that the signal can be transmitted accurately within the range.

As described above, according to the configuration of the video signal reproducing apparatus according to the present invention, emphasis in the time axis direction and the vertical direction is performed in the picture period in the video signal on the recording side. Since de-emphasis is performed in the time axis direction and the vertical direction only during the picture period of the video signal even when emphasis is not performed, there is an effect that the information signal and the correction signal can be accurately reproduced.

[Brief description of the drawings]

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

FIG. 2 is a waveform chart for explaining a line of an information signal inserted into an HD signal.

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

FIG. 4 is a conceptual diagram for explaining the operation of a 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 for explaining a main part of a video signal reproducing apparatus according to one embodiment of the present invention.

[Explanation of symbols]

7 division means 8-11 time axis emphasis means 12-14 vertical emphasis means 17,18 first and second TCI conversion means (TCI conversion means) 19 recording information signal generation means 20 correction signal generation means 36,37 correction means 40 Determination means (reproduction information signal generation means) 38, 39 first and second TCI inverse conversion means (TCI inverse conversion means) 41 to 43 vertical deemphasis means 44 to 47 time axis deemphasis means 48 synthesis means (output video signal Generating means) 49 selecting means (output video signal generating means) 15a, 16a first and second TCI signals (TCI signals) 17a, 18a first and second recording signals (recording signals) 19a TCI information signals 20a correction signals 40a Information signal aa, bb, cc Y, PB, PR signal (video signal) TT Magnetic tape (recording medium)

Claims (4)

(57) [Claims] 1. A video signal recording apparatus for recording a video signal in which an information signal is interposed in a predetermined line, wherein upper and lower lines including the predetermined line related to the video signal are deleted to form two systems. Dividing means for dividing, a time axis emphasis means for enhancing a high frequency component in a time axis direction related to an output signal of the dividing means in comparison with a low frequency component, and a vertical axis related to an output signal of the time axis emphasis means. Vertical emphasis means for emphasizing high frequency components in the direction by comparing them with low frequency components, and a TCI obtained by time axis compressing and time axis multiplexing a luminance signal and a color signal relating to an output signal of the vertical emphasis means. TCI conversion means for outputting a signal, TCI information signal generation means for applying a predetermined change to the information signal separated from the video signal to generate a TCI information signal, and for correcting transmission characteristics And correction signal generating means for generating a positive signal, video signal recording device having a recording means for recording the recording signal comprising at least the TCI signals and the TCI information signal and the correction signal. 2. A video signal recording apparatus for recording a video signal in which an information signal is inserted into a predetermined line, wherein upper and lower lines including the predetermined line related to the video signal are deleted to form two systems. Dividing means for dividing, a time axis emphasis means for enhancing a high frequency component in a time axis direction related to an output signal of the dividing means in comparison with a low frequency component, and a vertical axis related to an output signal of the time axis emphasis means. Vertical emphasis means for emphasizing high frequency components in the direction by comparing them with low frequency components, and a TCI obtained by time axis compressing and time axis multiplexing a luminance signal and a color signal relating to an output signal of the vertical emphasis means. TCI conversion means for outputting a signal, TCI information signal generation means for applying a predetermined change to the information signal separated from the video signal to generate a TCI information signal, and for correcting transmission characteristics A correction signal generating means for generating a positive signal; and a horizontal direction for enhancing a horizontal high frequency component of a recording signal comprising at least the TCI signal, the TCI information signal, and the correction signal by comparing with a low frequency component. A video signal recording apparatus comprising: an emphasis unit; a limiter unit that limits an amplitude level of an output signal of the horizontal emphasis unit; and a recording unit that performs FM modulation on an output signal of the limiter unit and records the signal on a recording medium. 3. A video signal reproducing apparatus for reproducing a recording medium according to claim 1, wherein said reproducing means reproduces said recording signal from said recording medium, and said reproducing means reproduces said reproduced signal based on said reproduced correction signal. Correction means for correcting the transmission characteristic of the output signal of the means; information signal generation means for generating an information signal based on the TCI information signal of the output signal of the correction means; TCI inverse conversion means for extending the time axis of the TCI signal and separating it into a luminance signal and a chrominance signal; comparing the high frequency component in the vertical direction related to the luminance signal and the chrominance signal with the low frequency component Vertical de-emphasis means for attenuating, and time-axis de-emphasis means for attenuating a high-frequency component in the time axis direction related to an output signal of the vertical de-emphasis means in comparison with a low-frequency component Combines the output signal of the time axis deemphasis means, video signal reproducing apparatus characterized by an output video signal generating means for generating an output video signal by inserting the information signal to a predetermined line. 4. A video signal reproducing apparatus for reproducing a recording medium according to claim 2, wherein said reproducing means reproduces said recording signal from said recording medium to perform FM demodulation, and relates to an output signal of said reproducing means. A horizontal de-emphasis means for attenuating a high frequency component in the horizontal direction in comparison with a low frequency component, and transmitting the output signal of the reproducing means based on the correction signal according to the output signal of the horizontal de-emphasis means Correction means for correcting the characteristic; information signal generation means for generating an information signal based on the TCI information signal relating to the output signal of the correction means; and extending the time axis of the TCI signal relating to the output signal of the correction means. TCI inverse conversion means for separating the luminance signal and the chrominance signal into a luminance signal and a chrominance signal, and attenuating a high frequency component in the vertical direction of the luminance signal and the chrominance signal in comparison with a low frequency component Direct de-emphasis means, time-axis de-emphasis means for attenuating a high frequency component in the time axis direction related to an output signal of the vertical de-emphasis means in comparison with low frequency components, and an output of the time axis de-emphasis means An output video signal generating means for generating an output video signal by synthesizing a signal and inserting the information signal into a predetermined line.