JPH07123361A - Video signal recorder and video signal reproducing device - Google Patents

Abstract

PURPOSE:To accurately transmit information signals and correction signals by executing emphasis in a time base direction and a vertical direction to a picture pattern period in video signals on a recording side but not executing the emphasis in the time base direction and the vertical direction to the information signals and the correction signals without correlation in the time base direction and the vertical, direction. CONSTITUTION:Input brightness signals aa and chrominance signals bb and cc which became a normal amplitude level are supplied through A/D converters 4-6 to a dividing means 7 and divided into two systems. The output signals of the dividing means 7 are supplied to time base emphasis means 8-10 and high-band frequency components in the time base direction are emphasized. Then, for the output signals, the high-band frequency components in the vertical direction are emphasized in vertical emphasis means 12-14. On the other hand, the emphasis in the time base direction and the vertical, direction is not executed to the information signals 19a and the correction signals 20a without the correlation in the time base direction and the vertical direction and 15a and 16a relating to picture patterns, the information signals 19a, the correction signals 20a and blanking signals 21a are selected by first and second selecting means 17 and 18.

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 applicant of the present invention 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 for improving the S / N of a reproduced video signal by performing de-emphasis in the reverse order were previously proposed (Japanese Patent Application No. 4-3).
No. 59260, unpublished at the time of filing this application).

[0003] Here, emphasis / de-emphasis in the time axis direction is to improve S / N by using the correlation of video signals between a plurality of frames, and emphasis in the time axis direction is an image between a plurality of past frames. Based on the signal, the high frequency component of the video signal of the current frame is emphasized in comparison with the low frequency component (enhancement of uncorrelated signal components). The high frequency component of the video signal of the current line is emphasized in comparison with the low frequency component based on the video signal between the lines. On the other hand, de-emphasis in the time axis direction is a method of reducing the high frequency component of the video signal of the current frame based on the video signals of a plurality of past frames in comparison with the low frequency component (a signal having no correlation). Vertical de-emphasis is a method of reducing the high frequency component of the video signal of the current line based on the video signals of a plurality of lines in the past in comparison with the low frequency component (correlation). It was a reduction of signal components having no effect).

[0004]

On the other hand, there are two systems for recording a high definition video signal such as a high-definition video signal (1125 scanning lines) which has a wider band and a larger number of scanning lines than a conventional video signal. In some cases, it is desired to record the data separately, but in such a case, it is necessary to add a correction signal to the recording signal for recording in order to correct the transmission characteristics of both systems. In addition, it may be desired to record an information signal inserted in the video signal.
These correction signal and information signal are inserted and recorded in the 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 vertical blanking period is subjected to the time axis direction or the vertical direction emphasis / de-emphasis, a high frequency component is generated. There is a drawback in that the signal is excessively emphasized, exceeds the dynamic range (bandwidth in the case of FM modulation) of the transmission path, and the signal is not accurately transmitted.

Therefore, 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]

The present invention provides the following configurations in order 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 upper and lower lines including the predetermined line relating to the video signal are deleted and divided into two systems. Dividing means, a time axis emphasis means for emphasizing a high frequency component in the time axis direction related to the output signal of the dividing means by comparing it with a low frequency component, and a vertical direction related to the 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-compressing a luminance signal and a chrominance signal related to an output signal of the vertical emphasis means and time-axis multiplexing TCI conversion means for outputting, TCI information signal generation means for generating a TCI information signal by subjecting the information signal separated from the video signal to a predetermined change, 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 means for recording a recording signal composed of 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 inserted in a predetermined line, wherein upper and lower lines including the predetermined line relating to the video signal are deleted to divide into two systems. Dividing means, a time axis emphasis means for emphasizing a high frequency component in the time axis direction related to the output signal of the dividing means by comparing it with a low frequency component, and a vertical direction related to the 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-compressing a luminance signal and a chrominance signal related to an output signal of the vertical emphasis means and time-axis multiplexing TCI conversion means for outputting, TCI information signal generation means for generating a TCI information signal by subjecting the information signal separated from the video signal to a predetermined change, and correction for correcting transmission characteristics And correction signal generating means for generating a No.,
Horizontal emphasis means for emphasizing a horizontal high frequency component of a recording signal composed of at least the TCI signal, the TCI information signal and the correction signal in comparison with a low frequency component, and an output of the horizontal emphasis means A video signal recording apparatus having limiter means for limiting an amplitude level of a signal, and recording means for performing FM modulation on an output signal of the limiter means and recording it on a recording medium.

A video signal reproducing apparatus for reproducing the recording medium according to claim 1, wherein the reproducing means reproduces the recording signal from the recording medium, and the reproducing means reproduces the corrected signal based on the reproduced correction signal. Correction means for correcting the transmission characteristics 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 for extending the time axis of and separating it into a luminance signal and a chrominance signal
I inverse conversion means, vertical de-emphasis means for attenuating vertical high frequency components of the luminance signal and the color signal in comparison with low frequency components, and output signals of the vertical de-emphasis means The time axis de-emphasis means for attenuating the high frequency component in the time axis direction compared to the low frequency component and the output signal of the time axis de-emphasis means are combined, and the information signal is inserted into a predetermined line and output. A video signal reproducing device, comprising: an output video signal generating means for generating a video signal.

A video signal reproducing apparatus for reproducing the recording medium according to claim 2, wherein the reproducing means reproduces the recording signal from the recording medium to perform FM demodulation, and a horizontal direction relating to an output signal of the reproducing means. Of the horizontal de-emphasis means for attenuating the high-frequency component of the signal compared to the low-frequency component and the correction signal related to the output signal of the horizontal de-emphasis means to determine the transmission characteristic of the output signal of the reproducing means. Correction means for correcting, information signal generating means for generating an information signal based on the TCI information signal relating to the output signal of the correcting means, and extending the time axis of the TCI signal relating to the output signal of the correcting means. TCI inverse conversion means for separating a luminance signal and a chrominance signal, and a vertical for attenuating a vertical high frequency component of the luminance signal and the chrominance signal in comparison with a low frequency component And a time axis de-emphasis means for attenuating a high frequency component in the time axis direction related to the output signal of the vertical de-emphasis means in comparison with a low frequency component, 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]

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,
6 is a timing chart for explaining the operation of the modulation 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 a video signal reproducing apparatus according to an embodiment of the present invention. It is a block diagram for explaining.

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 an information signal on a predetermined line, and the HD signal in which this information signal is inserted is the video according to the present embodiment. The signal recording / reproducing apparatus is an input signal. Therefore, the information signal, the recording system, and the reproducing system will be described.

(Information Signal) FIG. 1A shows lines of an information signal inserted in a luminance signal (hereinafter, abbreviated as "Y signal") related to an HD signal. The contents of the information signal are, as shown in FIG. 6C, a preamble signal (8 bits) for synchronizing the clock during reproduction,
Sync signal (8 bits) for identifying the start of data,
To manage the data signal (56 bits) indicating the type of the video signal, the time code signal (32 bits) indicating the time information, the error correction signal (16 bits) for performing error detection / correction during reproduction, and the recording level. Level reference signal (corresponding to 8 bits). The normal level of the level reference signal is 50 IRE, and the bits of other signals correspond to "0" for 20 IRE and "1" for 80 IRE. It should be noted that FIG. 3B is a line diagram of the information signal inserted in the luminance signal related to the NTSC signal.

The data signal is made up of 7 words in units of 8 bits. 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 Identification of presence / absence) and control signal information (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 through 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 the line numbers, and the first line starts from the start of the vertical sync signal of the odd field.

Here, the line through which the information signal is inserted is
Since the vertical blanking period and the horizontal synchronizing signal period including the vertical synchronizing signal may be deleted by the high-definition equipment, it is necessary to insert a level standard signal in the effective scanning line, and the information signal is not a pattern signal. , 8% to 1 for all scan lines so that they are not displayed on the monitor screen
It is necessary to consider that the monitor has a 0% overscan characteristic.

Therefore, considering these points, the lines on which the information signal is inserted are 41 to 66 lines of the HD signal.
Line, 532-557 line, 603 line-628
It becomes one line or a plurality of lines from the lines and 1095 to 1120 lines. By the way, since the number of scanning lines that the monitor overscans actually varies from device to device, it is more preferable to insert an information signal into a scanning line that is an effective scanning line and is unlikely to appear on the screen. desirable. Also, in the HD signal of the studio standard, there are 1035 effective scanning lines, and the effective picture period is 41 lines to 557 lines and 603 lines to 112 lines.
It is line 0. 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.
It is a line.

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 information signal in one line or a plurality of lines among the 557, 603, 604, 1119 and 1120 lines.

Further, lines 41 and 603 are effective scanning lines for studio standard HD signals, 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 insert the information signal in the 41 line and / or the 603 line.

Therefore, the video signal magnetic recording / reproducing apparatus according to the present embodiment outputs the 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 the 604 line. It is assumed that the information signal is inserted.

(Recording system) HD signal or NT using FIG.
A recording system of a video signal recording / reproducing apparatus for recording / reproducing SC signals will be described. In the same figure, input Y from a transmission line not shown
Signal aa (luminance signal) and input PB, PR signals bb, cc
(Color signal) is supplied to the AGC means 1 to 3, respectively. Here, the input Y, PB, and PR signals are signals that comply with the domestic high-definition signal standard, and R, G, and
It 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 AGC means 1 to 3 are A / D conversion. The amplitude level of each signal is corrected based on the level reference signal in the information signal related to the output signal 4a of the output device 4. When the level reference signal is inserted in the 603 line, this is given the highest priority, If the level reference signal is not inserted in the 603 line and the level reference signal is inserted in the 604 line, the level reference signal is used to detect the 603 line and the 60
If the level reference signal is not inserted in any of the four lines, the level is corrected based on the amplitude level of the horizontal synchronizing signal.

Then, the input Y, PB, PR signals aa, bb, cc having a normal amplitude level are converted into A / D converters 4.
Through 6 to the dividing means 7. The dividing means 7 is an A / D converter for input Y, PB, PR signals aa, bb, cc.
It plays a role of dividing the output signals of the converters 4 to 6 into two systems. This division process will be described with reference to FIG. 4. The input Y, PB, PR signals aa, bb, cc shown in the upper left part of FIG.
The number of effective scanning lines of the MUSE signal (1032) obtained by deleting the synchronizing signal and the lines related 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 and PR signals 7b and 7a related to the even lines and the odd lines are divided. The second Y and PB signals 7c and 7d are obtained. Although the PR signal related to the odd line and the PB signal related to the even line are deleted, since these signals have a high line correlation, line sequential demodulation is performed during reproduction.

Then, the output signal of the dividing means 7 is supplied to the time axis emphasis means 8 to 10, where the high frequency components in the time axis direction are emphasized based on the signals of the past plural 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 state of editing, and the processing of the video signal after the editing point is performed by ignoring the video signals 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 related to the signal 7d are passed through the vertical emphasis means 12 and 14 for emphasizing the vertical high frequency components, and the first and second TCI conversion means 15 and 16 are provided. Is 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 then the signal obtained by emphasizing the high frequency component in the vertical direction is again divided into even lines and odd lines. Are supplied to the first and second TCI conversion means 15 and 16, respectively.

Then, the first and second TCI processing means 1
5 and 16 are first and second TCI signals 15a obtained by time-axis-compressing the input signal line-by-line and time-axis multiplexing.
16a is supplied to the first and second selecting means 17 and 18, respectively.

Then, the first and second selecting means 17, 18
Is the first and second TCI signals 15a and 16a relating to the design.
Then, the TCI information signal 19a, the correction signal 20a, and the blanking signal 21a, which will be described later, are selected to generate the 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 the figure, 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. 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 a TCI information signal,
The signal indicated by "AL" is a correction signal. In this way, the selection means 15 and 16 are connected to the first and second TCI conversion means 15 and
Since the signal other than the picture period, such as the TCI information signal 19a and the correction signal 20a, has no correlation in the time axis direction and the vertical direction, it is provided in the latter part of 16 when the emphasis is applied in the time axis direction and the vertical direction. This is because there is a risk that information will be lost by the limiter in the subsequent stage due to the emphasis of the high frequency components.

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 has an output signal 4 from the A / D converter 4.
After the information signal in a and the editing information signal 19b are supplied, the former signal is discriminated by using a predetermined level (for example, the maximum level of the horizontal synchronizing signal) as a threshold value, and is subjected to processing such as error correction / detection. The editing information inserted in the third word in the data signal is rewritten based on the newly supplied editing information signal 19b. The program ID information, time code information, correction signal information, etc. are replaced with new information if there is a change. Then, after newly adding an error correction signal, special modulation is performed.

In this modulation, the signal represented by binary is converted into 3
By converting the value into a value, the spike level immediately after the edge generated as a result of emphasizing the high frequency component by the horizontal emphasis means 24, 25 described later is reduced, and is limited by the limiter means 26, 27 for preventing overmodulation. It does not exceed the limiter level. As will be specifically described with reference to FIG. 6, FIG. 6A shows a clock signal, and six cycles thereof correspond to 1 bit of the signal shown in FIG. Then, as shown in FIG. 7C, the signal changes from "1" to "0" and the current "0"
For each bit of clock signal, 50,20,
When the bits of "0" are continuous, such as 20,20,20,20IRE, 20,20,20,20,2 for each sample of the clock signal.
If the signal changes from “0” to “1” and the bit is currently “1” so that it becomes 0,20IRE, it becomes 50,80,80,80,80,80IRE for each sample of the clock signal. As shown in the figure, when the bits of "1" are consecutive,
Modulate to be 80,80,80,80,80,80IRE. The modulated signal becomes the signal shown in FIG. 7D at the outputs of the horizontal emphasis means 24 and 25, which will be described later, and does not exceed the limiter level. Therefore, the limiter means 26 and 27 lose edge information. There is no. The signal modulated in this way is used as the first and second TCI information signals 19a.
Is supplied to the selection means 17, 18.

Next, the correction signal generating means 20 for generating the correction signal 20a 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 21 is also R
A blanking signal 21a composed of an OM or the like and 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 17 and 18 have the first and second TCI signals 15a and 16a, the TCI information signal 19a and the correction signal 2 relating to the picture.
0a and the blanking signal 21a are appropriately selected to obtain the first and second recording signals 17a and 18a, and the D / A converter 2
It is supplied to the horizontal emphasis means 24 and 25 via 2 and 23, 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 signal 17a relating to the even-numbered line is applied to the magnetic head A arranged on the rotating drum.
1 to “55” to “55” shown in FIG.
6 (1/2) ”and the magnetic head A2 is used to record“ 556 ”shown in FIG. 8 (A).
(1/2) ”to“ 1118 ”are recorded. On the other hand, the second recording signal 1 related to the odd-numbered lines
8a uses the magnetic head B1 arranged on the rotary drum, and the switch from "SW" to "557 (1 /
2) ”and the magnetic head B
2 is used to display “557 (1 /
2) ”to“ 1119 ”.
Further, the magnetic heads A1 and B1 or the magnetic heads A2 and B2, which are arranged close to each other, perform the simultaneous recording, and the voice magnetic heads 3A and 3B (not shown) preceding the magnetic heads in FIG. Audio tracks A and B are formed. still,
Magnetic heads A1, A2, B1, B2 and voice 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 heights of A and 3B.

(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
Horizontal de-emphasis means 32 and 33, which have a complementary relationship with 4, 25, attenuate high-frequency components in the horizontal direction, and then obtain them via A / D converters 34 and 35.
The second reproduction signals 34a and 35a are supplied to the correction means 36 and 37.

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

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

The discriminating means 40 uses the reproduced TCI.
The determination of "0" or "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 value, and the level information of the level reference signal is obtained. At the same time, the time axis is extended to generate an information signal, which is supplied to the selection means 49. Then, the selecting means 49 inserts the information signal in the line 603 of the Y signal.

On the other hand, the first and second TCI inverse conversion means 3
8, 39 are the above-mentioned first and second TCI conversion means 15,
16 has a complementary relationship with 16, and compresses the luminance signal and the compressed line-sequential color signal on the time axis to generate the first reproduction Y and PR signals 3
8b, 38a and second reproduction Y, PB signals 39b, 39a
And generate.

Then, the first reproduction PR signal 38a and the second reproduction PR signal 38a
Of the reproduced PB signal 39a from the vertical de-emphasis means 4
Signals 44a and 4 obtained by reducing the high frequency components in the vertical direction and then reducing the high frequency components in the time axis by time axis de-emphasis means 44 and 47.
7a is supplied to the synthesizing means 48.

On the other hand, the first and second reproduced Y signals 38b, 3
Reference numeral 9b denotes a vertical de-emphasis means 42, which is obtained by rearranging both input signals in line order to reduce the high frequency component in the vertical direction and again dividing both signals into an even line and an odd line. The signals 45a and 46a obtained by reducing the high frequency components in the time axis direction by the time axis de-emphasis 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 edit information relating to the information signal 40a, and the processing of the video signal after the edit point is performed in a plurality of frames before the edit point which is a past frame. The video signal of is ignored. Therefore, it is possible to reproduce a high-quality video signal without inconvenience such as occurrence of an afterimage and blurring.
The vertical de-emphasis means 41 to 42 are in a complementary relationship with the vertical emphasis means 12 to 14, respectively, and the time axis de-emphasis means 44 described above.
˜47 are in a complementary relationship with the time axis emphasis means 8-11.

Then, the first and second reproduction Y are performed by the synthesizing means.
The signals 45a and 46a relating to the signals 38b and 39b are rearranged in line order to generate a Y signal, and the first PR signal 38a is generated.
Signal 44a relating to the second PB signal 39a is subjected to line-sequential demodulation to generate a PR signal, and the signal 47a relating to the second PB signal 39a is subjected to line-sequential demodulation to generate a PB signal.

The PR and PB signals are D / A converters 50 and 51.
And output as 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 the transmission line (not shown) via the D / A converter 52.

Further, according to the recording / reproducing apparatus of this embodiment, even when the HD signal in which the information signal is inserted in the 603 line is recorded, 10 of the scanning lines of the HD signal 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.

In the above embodiment, an example of the recording signal processing means and the reproduction signal processing means for performing the image processing on the time axis emphasis means and the time axis de-emphasis means based on the video signal of the past frame or field. However, the present invention is to improve the inconvenience caused by the loss of the 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. It is needless to say that the present invention is not limited to the emphasis means and the time axis de-emphasis means, and may be applied to, for example, compression / expansion processing of video signals between frames or fields using orthogonal transformation or the like. is there.

In the above-described embodiment, the output signals of the correction means 36 and 37 are used as the input signals of the determination means 40 in order to distinguish the information signal from the corrected signal, but the A / D converters 34 and 35 have the same output signals. Of course, the output signal may be used as the input signal.

In the above-described embodiment, the video signal recording / reproducing apparatus uses the magnetic tape as the recording medium for the VTR.
However, the present invention is not limited to this, and the recording medium may be a disc-shaped optical disk, floppy disk, or the like, or may be a semiconductor memory. .

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.

[0054]

As described above, according to the configuration of the video signal recording apparatus of the present invention, the dividing means for deleting the upper and lower lines including the predetermined line relating to the video signal to divide into two systems, and the dividing means. Time-axis emphasis means for emphasizing the high-frequency component in the time-axis direction related to the output signal of the low-frequency component, and a high-frequency component in the vertical direction related to the output signal of the time-axis emphasis means for the low-frequency component. A vertical emphasis means for emphasizing in comparison with a frequency component, and a TC for outputting a TCI signal obtained by time-axis-compressing a luminance signal and a chrominance signal related to an output signal of the vertical emphasis means.
I conversion means, TCI information signal generation means for generating a TCI information signal by subjecting the information signal separated from the input video signal to a predetermined change, and correction signal generation means for generating a correction signal for correcting transmission characteristics. And a recording means for recording a recording signal composed of at least the TCI signal, the TCI information signal and the correction signal on a recording medium, so that emphasis in the time axis direction and the vertical direction is performed during the picture period in the video signal. Therefore, the S / N can be improved, and 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 accurately transmitted within the range.

As described above, according to the configuration of the video signal reproducing apparatus of the present invention, the recording side performs the emphasis in the time axis direction and the vertical direction in the picture period in the video signal, but the information signal and the correction signal are processed. Even when the emphasis is not applied, since the de-emphasis in the time axis direction and the vertical direction is applied only during the picture period of the video signal, the information signal and the correction signal can be accurately reproduced.

[Brief description of drawings]

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 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.

[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 Discriminating means (reproduction information signal generating means) 38, 39 First and second TCI inverse transforming means (TCI inverse transforming means) 41-43 Vertical de-emphasis means 44-47 Time-axis de-emphasis means 48 Synthesizing means (output video signal) Generation means) 49 Selection means (output video signal generation means) 15a, 16a First and second TCI signals (TCI signals) 17a, 18a First and second recording signals (recording signals) 19a TCI information signal 20a Correction signal 40a Information signal aa, bb, cc Y, PB, PR signal (video signal) TT Magnetic tape (recording medium)

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area H04N 9/81 A

Claims (4)

[Claims] 1. A video signal recording device for recording a video signal in which an information signal is inserted in a predetermined line, wherein upper and lower lines including the predetermined line relating to the video signal are deleted to provide two systems. Dividing means for dividing, a time axis emphasis means for emphasizing a high frequency component in the time axis direction of the output signal of the dividing means by comparing it with a low frequency component, and a vertical axis for an output signal of the time axis emphasis means Vertical emphasis means for emphasizing a high frequency component in a direction in comparison with a low frequency component, and a TCI obtained by time axis compression and time axis multiplexing of a luminance signal and a chrominance signal related to an output signal of the vertical emphasis means. TCI converting means for outputting a signal, TCI information signal generating means for generating a TCI information signal by subjecting the information signal separated from the video signal to a predetermined change, and for correcting the transmission characteristic 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 device for recording a video signal in which an information signal is inserted in a predetermined line, wherein upper and lower lines including the predetermined line relating to the video signal are deleted to provide two systems. Dividing means for dividing, a time axis emphasis means for emphasizing a high frequency component in the time axis direction of the output signal of the dividing means by comparing it with a low frequency component, and a vertical axis for an output signal of the time axis emphasis means Vertical emphasis means for emphasizing a high frequency component in a direction in comparison with a low frequency component, and a TCI obtained by time axis compression and time axis multiplexing of a luminance signal and a chrominance signal related to an output signal of the vertical emphasis means. TCI converting means for outputting a signal, TCI information signal generating means for generating a TCI information signal by subjecting the information signal separated from the video signal to a predetermined change, and for correcting the transmission characteristic Correction signal generating means for generating a positive signal, and a horizontal direction for emphasizing a horizontal high frequency component of a recording signal composed of at least the TCI signal, the TCI information signal and the correction signal in comparison with a low frequency component. A video signal recording apparatus comprising: an emphasis means; a limiter means for limiting an amplitude level of an output signal of the horizontal emphasis means; and a recording means for performing FM modulation on the output signal of the limiter means and recording it on a recording medium. 3. A video signal reproducing apparatus for reproducing the recording medium according to claim 1, wherein the reproducing means reproduces the recording signal from the recording medium, and the reproducing means reproduces the recording signal based on the reproduced correction signal. Correcting means for correcting the transmission characteristic of the output signal of the means, information signal generating means for generating an information signal based on the TCI information signal of the output signal of the correcting means, and the above-mentioned output signal of the correcting 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, and comparing a vertical high frequency component relating to the luminance signal and the chrominance signal with a low frequency component Vertical de-emphasis means for attenuating, and time-axis de-emphasis means for attenuating the high frequency component in the time axis direction related to the output signal of the vertical de-emphasis means in comparison with the 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 the recording medium according to claim 2, wherein the reproducing means reproduces the recording signal from the recording medium and performs FM demodulation, and an output signal of the 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 a transmission related to the output signal of the reproduction means based on the correction signal related to the output signal of the horizontal de-emphasis means. Correction means for correcting characteristics, information signal generation means for generating an information signal based on the TCI information signal related to the output signal of the correction means, and time axis extension of the TCI signal related to the output signal of the correction means And a TCI inverse conversion means for separating the luminance signal and the chrominance signal, and attenuating the vertical high frequency component of the luminance signal and the chrominance signal in comparison with the low frequency component. Direct de-emphasis means, time-axis de-emphasis means for attenuating high frequency components in the time-axis direction related to the output signal of the vertical de-emphasis means in comparison with low-frequency components, and output of the time-axis de-emphasis means A video signal reproducing device, comprising: an output video signal generating means for synthesizing signals and inserting the information signal in a predetermined line to generate an output video signal.