JPH06342555A - Signal recording device and signal reproducing device - Google Patents

Abstract

PURPOSE:To improve the utilization rate of a recording medium and to identify a sound signal formation by compressing time during the period of perpendicular synchronization having no relation to patterns. CONSTITUTION:A video signal from lines and first and second sound signals WW and XX are recorded on a recording device to identify the formation of the sound signal. The upper and lower lines relating to the video signal are erased, these are devided into two systems by using a deviding means 7 and first and second devided signals are processed at first, second signal processing means 16 and 17. The sound signals WW and XX relating to the video signal are extracted at first and second selecting means 18 and 19 and the video signal is recorded on first and second video signal recording means 18a and 19a. Thus, by sound information of, for example, a stereo sound, a bilingual sound, etc., the simultaneous output of Japanese and English is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal recording device and a signal reproducing device, and more particularly to a signal recording device and a signal reproducing device suitable for identifying the format of an audio signal.

[0002]

2. Description of the Related Art Conventionally, a deep recording method has been known as a method of recording and reproducing a video signal and an audio signal in a magnetic recording and reproducing apparatus. In this system, an FM-modulated audio signal is deeply recorded on a magnetic recording medium, and an FM-modulated luminance signal and a low-frequency converted color signal are frequency-multiplexed to be superimposed on a magnetic recording medium on which the audio signal is deeply recorded. Although it is recorded, the information for identifying the audio mode of the audio signal (for example, stereo audio, monaural audio, bilingual audio, etc.) is not recorded, and the deeply recorded audio signal is reproduced as it is.

[0003]

However, in the above-described conventional magnetic recording / reproducing apparatus, when a magnetic tape recorded in a bilingual audio mode is reproduced, the main voice and the sub voice (Japanese and English) are reproduced. Was played simultaneously, and the operator had to manually select one of the sounds each time.

When the output audio signal of the magnetic recording / reproducing apparatus is supplied to an AV amplifier or the like, since the audio mode cannot be identified, an audio effect function (for example, enhancement of presence of stereo audio, monaural audio) is provided. There was a drawback that the switching of the pseudo stereo effect etc.) had to be performed manually.

Therefore, an object of the present invention is to provide a signal recording device and a signal reproducing device capable of discriminating and judging a plurality of types of audio signals.

[0006]

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

A signal recording device for recording a video signal in which audio information for identifying the format of an audio signal is inserted in a predetermined line and a first and a second audio signal. A dividing unit that deletes the upper and lower lines including the predetermined line and divides the video signal into two systems, and a first signal processing unit that applies predetermined signal processing to the first and second divided signals output from the dividing unit. , Second signal processing means, and first and second selection for extracting the audio information from the predetermined line related to the video signal and inserting the audio information into the output signals of the first and second signal processing means. Means, first and second video signal recording means for recording the first and second video recording signals output from the first and second selection means on a recording medium, and the first and second video signal recording means. Audio signal recording means for recording an audio signal in the recording medium Recording apparatus.

A signal reproducing apparatus for reproducing a recording medium on which a video signal in which audio information for identifying the format of an audio signal is inserted and a first and a second audio signal are recorded. Video signal reproducing means for reproducing a signal, and the first and second video signal reproducing means.
The audio signal reproducing means for reproducing the audio signal, the discriminating means for discriminating the audio information from the reproduced video signal, the discrimination result of the discriminating means and the preset output format information of the audio signal. And a sound signal selecting means for selectively outputting the first and second sound signals reproduced based on the signal reproducing apparatus.

[0009]

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,
FIG. 3 is a block diagram for explaining a main part of a video signal and audio signal recording apparatus according to an embodiment of the present invention, FIG. 4 is a conceptual diagram for explaining the operation of the dividing means, and FIG. 5 is a TCI.
6 is a waveform diagram of the signal, FIG. 6 is a flowchart for explaining the operation of the modulation means, FIG. 7 is a waveform diagram of the TCI information signal, and FIG.
Is a tape pattern in W mode, FIG. 9 is a waveform diagram of TCI signal in W-NT mode and 2NT mode, FIG. 10 is a tape pattern in W-NT mode and 2NT mode, and FIG. 11 is an image according to an embodiment of the present invention. FIG. 12 is a block diagram for explaining the main part of the signal reproducing apparatus, and FIG. 12 is a block diagram showing a specific example of the signal recording / reproducing apparatus that constitutes the present invention.

This embodiment relates to a signal recording / reproducing apparatus for recording and reproducing a high definition video signal and a conventional video signal and audio signal. Here, an HD signal is used as an example of the high definition video signal and audio signal. Also, an NTSC signal will be described as an example of a conventional video signal and audio signal.

The HD signal or NTSC signal which is the output signal of the signal recording / reproducing apparatus according to the present embodiment has an information signal on a predetermined line, and the HD signal or NTSC in which this information signal is inserted. The signal recording / reproducing apparatus according to this embodiment uses a signal as an input signal. Therefore, the recording system for the information signal, the video signal and the audio signal, and the reproduction system for the video signal and the audio signal will be described.

(Information Signal) FIGS. 1A and 1B show a luminance signal (hereinafter abbreviated as “Y signal”) relating to an HD signal or NT.
Each of the lines of the information signal inserted in the SC signal is illustrated. The contents of the information signal are, as shown in FIG. 6C, a preamble signal (8 bits) for synchronizing clocks during reproduction, a synchronization signal (8 bits) for identifying the start of data, and a video signal. A data signal (56 bits) indicating the type of data, a time code signal (32 bits) indicating time information, an error correction signal (16 bits) for error detection / correction during reproduction, and a level for managing the recording level. It consists of a reference signal (corresponding to 8 bits). The normal level of the level reference signal is 50 IRE, and each bit of the other signals has 20 IRE set to "0".
0IRE corresponds to "1".

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 audio signal format such as stereo audio, monaural audio, bilingual audio, etc.), editing information (for example, identification of editing start, editing end, editing, etc.), correction. It represents signal information (for example, identification of the presence or absence of a correction signal) and control signal information (for example, identification of the duty ratio of a control signal such as VISS, VASS). Also, the fourth
The fifth word is text information and represents 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 units of 8 bits. 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 information signal is inserted is HD
Signals and NTSC signals will be explained separately. The case of the HD signal 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 an information signal in the effective scanning line.
Since the information signal is not a picture signal, it is necessary to consider that the monitor has an overscan characteristic of 8% to 10% with respect to all the scanning lines so as not to be displayed on the screen of the monitor.

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 line and the lines 42, 604, 557, and 1121 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 level standard signal in one line or a plurality of lines out of the 557, 603, 604, 1120 and 1121 lines.

Further, the 41st line and the 603th line are effective scanning lines for 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 insert the information signal in the 41 line and / or the 603 line.

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

On the other hand, in the case of the NTSC signal, the information signal is inserted into the 19th line which is an effective scanning line and is unlikely to appear on the screen as in the HD signal, and the 19th line is output. An information signal is inserted into and input.

(Recording system) HD signal or NT using FIG.
To explain the recording system of a signal recording / reproducing apparatus for recording / reproducing SC signals, this signal recording / reproducing apparatus records the HD signal at the standard tape running speed in the W mode and the NTSC signal at one tape running speed for one program. There is a W-NT mode for recording and a 2NT mode for recording two programs of an NTSC signal at a standard tape running speed.

First, the W mode will be described. In the figure, the input Y signal aa (luminance signal) and the input PB, PR signals bb and cc (color signal) are AGed from a transmission line (not shown).
It is supplied to the C means 1 to 3, respectively. Here, input Y, P
The B and PR signals are signals conforming to the domestic high-definition signal standard, and are signals converted from the 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) And the AGC means 1 to 3 are A / D conversions. 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. As a result, even when an HD signal with a larger amplitude than the normal amplitude level comes in, the amplitude level of the information signal is corrected, so that the limiter described later does not limit the amplitude, and the information signal can be displayed normally. You can record. Then, the input Y, PB, PR signals aa, bb, cc having the normal amplitude level are supplied to the dividing means 7 via the A / D converters 4-6. This dividing means 7 inputs Y, PB, PR
It plays a role of dividing the output signals of the A / D converters 4 to 6 related to the signals aa, bb, and cc into two systems. This division processing will be described with reference to FIG. 11 which is an effective scanning line for HD signals
Since 25 lines include a vertical blanking period that is unrelated to the pattern, recording all of them reduces the utilization efficiency of the recording medium. Therefore, in the input Y, PB, PR signals aa, bb, cc (HD signals) shown in the upper left of the figure, the sync signal and the lines relating to the upper and lower sides of the screen are deleted M.
A signal corresponding to the number of effective scanning lines (1032) of the USE signal is generated, and this signal is shown in the lower left and lower right of FIG.
It is divided into system signals. The first Y, PB, PR signals 7a, 7b, 7c and the second Y, PB obtained by dividing in this way
The PB and PR signals 7d, 7e and 7f are supplied to the first and second selecting means 8 and 9, respectively. Incidentally, since the 603 lines or 604 lines in which the information signal is inserted are deleted in this division processing, the time-axis compressed TCI information signal 20a is generated by the information signal generating means 20 to be described later, and the recording signal of the recording signal is generated. It is inserted on a predetermined line.

The first and second selecting means 8 and 9 are for appropriately selecting the input signal in the W mode, the W-NT mode and the 2NT mode. In the W mode, the first Y and P are selected.
B, PR signals 7a, 7b, 7c and second Y, PB, PR
The signals 7d, 7e and 7f are selectively output to the first and second TCI conversion means 16 and 17, respectively. In the W-NT mode, the first selecting means 8 converts the third Y, PB, PR signals 14a, 14b, 14c into the first TCI converting means 16
Selectively output to. In the 2NT mode, the third Y, PB, PR signals 14a, 14b, 14c and the fourth Y, PB, PR signals 15a, 15b, 15c are first and
It is selectively output to the second TCI conversion means 16 and 17. still,
The W-NT mode requires only one system, so the second
Selection means 9 does not output any input signal.

Then, the first and second TCI processing means 1
6, 17 are the first and second PB signals 7b, 7e and the first, second
The second PR signals 7c and 7f are converted into line-sequential color signals,
A compressed line-sequential color signal obtained by compressing this signal on the time axis,
A first and second TCI signal 16 obtained by time-axis multiplexing the time-axis-multiplexed second Y signals 7a and 7d with a compressed luminance signal.
a and 17a are supplied to the third and fourth selecting means 18 and 19, respectively.

Then, the third and fourth selecting means 18, 19
Is the first and second TCI signals 16a and 17a related to the design.
, The TCI information signal 20a, the correction signal 21a, and the blanking signal 22a are selected to display the first and second signals shown in FIG.
Recording signals 18a and 19a are generated. That is, in the period T1 shown in the figure, the first and second TCI signals 16
a and 17a are selected, and the blanking signal 2 is set in the period T2.
2a is selected, the TCI information signal 20a is selected in the period T3, and the correction signal 21a is selected in the period T8. still,
The signal indicated by "SW" in FIG. 5 is a switching signal that secures a margin for switching the magnetic head,
The signal indicated by "V" is a vertical synchronizing signal, and "DA"
The signal shown by is the TCI information signal, and the signal shown by "CAL" is the correction signal.

The information signal generating means 20 for generating the TCI information signal 20a will be described with reference to FIG. The time code signal generating means 200 is composed of a counter or the like,
When the recording of the input HD signal is started, the counter is reset to "0", and the count value is incremented by "1" for each recording of one frame (stepping, incrementing).
Time code signal 2 consisting of 4 words in bit units
00a is obtained, and this signal is supplied to the dividing means 201 and the error correction signal generating means 204.

The dividing means 201 plays a role of specifying the relationship between the time code signal 200a and the kind of the correction signal 21a described later. Here, it is preferable that the number of types of the correction signal 21a is large in view of correcting various characteristics, but since the configuration becomes complicated as the number of types increases, the use for broadcasting, business use, home use, etc. or a high-grade model. ，
It is convenient to be able to set the type according to the grade of popular models. In addition, it is necessary to ensure expandability so that a correction signal that is not currently assumed can be used in the future. Therefore, when the maximum number of types of correction signals including future possibilities is Q types (Q is a natural number of 2 or more), the first word representing the frame number in the time code signal 200a is divided by “Q”. The obtained remainder is supplied to the data signal generating means 202 and the selecting means 214 in the correction signal generating means 21 as the first control signal 201a.
In the present embodiment, the following description will be made assuming that Q = 5.

The data signal generating means 202 is supplied with the first control signal 201a and the information signal in the output signal 4a of the A / D converter 4, and the latter has a predetermined level (for example, the maximum level of the horizontal synchronizing signal). ) Is used as a threshold value to identify the information signal, and error correction / detection processing is performed, and the changed data such as program ID information, editing information, and correction signal information is replaced with new information to obtain a data signal 202a. The voice identification signal vv, which is supplied to the error correction signal generation means 204 and will be described later, is also included in this. As described above, the correction signal information is for identifying the presence or absence of the correction signal,
Here, three kinds of correction signals are prepared by the correction signal generating means 21 described later, and the first control signal 201a is "0" or "1".
Assuming that the above-mentioned three types of correction signals are generated corresponding to "2", the correction signal 21a is not recorded when the first control signal 201a represents "3" and "4". When the first control signal 201a indicates "0", "1", and "2", the correction signal information is changed to "1" indicating that there is a correction signal. . When the information signal is not inserted in the 603 line or the 604 line (for example, when a broadcast HD signal is recorded), the data signal 202a is the data signal such as the format type of the video signal and the audio signal. The data signal 202a is generated based on the output of the discrimination means (not shown) for discriminating the information necessary for generation.

Then, the time code signal 200a and the data signal 202a are supplied to the error correction signal generating means 206, the Reed-Solomon code is generated for these signals, and the output obtained by adding this code to the input signal is obtained. The signal is supplied to one input of the modulation means 206. Also, the modulation means 2
A preamble signal and a synchronizing signal are supplied from the additional signal generating means 205 to the other input of 06.

Then, the modulation means 206 converts the input signal represented by two values into three values so as to enhance the high frequency components by the emphasis means 25 and 26, which will be described later, immediately after the edge generated. The spike level is reduced so as not to exceed the limiter level limited by the limiter means 27, 28 for preventing overmodulation.
As will be specifically described with reference to FIG. 6, FIG. 6A shows a clock signal, and six cycles thereof are shown in FIG.
It corresponds to 1 bit of the input signal shown in FIG. Then, as shown in FIG. 7C, when the input signal changes from "1" to "0" and the bit is currently "0", 50, 20, 20, 20, When the bits of "0" are continuous, such as 20,20IRE, the input signal is changed from "0" to "1" so that it becomes 20,20,20,20,20,20IRE for each sample of the clock signal. If the bit is changed to “1” and is currently “1”, then 50,80,80,80,8 for each sample of the clock signal
0,80IRE, 80,80,80,80,80,80IRE for each sample of the clock signal when the bit of "1" is continuous.
Modulate so that The output signal of the modulation means 206 thus obtained is used as the emphasis means 25, which will be described later.
At the output of 26, the signal shown in FIG. 6D is obtained, and since it does not exceed the limiter level, the limiter means 27,
At 28, edge information is not lost.

The output signal of the modulation means 206 is supplied to the selection means 207, where the normal reference level (50 IRE) supplied from the level reference signal generation means 203.
The time-division multiplexed level reference signal having the above and a synchronization signal or the like supplied from a synchronization signal generating means (not shown) are obtained to obtain the TCI information signal 20a shown in FIG. The information signal inserted in the 603 line or 604 line of the Y signal aa is time-axis compressed during the period t1 in the figure. The compression ratio is set to be the same as the compression ratio of the Y signal aa. By setting like this, in the future,
It is also possible to deal with the case where an information signal is inserted in the PB and PR signals bb and cc.

The correction signal generating means 21 is composed of first to third ROMs 210 to 212 respectively storing different first to third correction signals 210a, 211a and 212a and a selecting means 213. The selection means 213 selectively outputs the first to third correction signals 210a, 211a, 212a based on the control signal 201a to obtain the first correction signal 21a. That is, when the first control signal 201a represents "0", "1", "2", the first to third correction signals 210a, 211a, 212a are selected, and the control signal 201a is "3", "4". RO, which is not shown
A blank signal consisting of the synchronization signal output from M and the pedestal level is selected. The first to third correction signals 210a, 211a, 212a are, for example, a ramp signal for correcting the linearity between the two systems, a grayscale signal for adjusting the DC level and the amplitude level between the two systems, and A multi-burst signal for correcting frequency characteristics between systems, a 2T pulse signal for correcting phase characteristics between systems (in the form of SIN2, the half-value width is 1 / of the band
Signal corresponding to 2).

Further, the blanking signal generating means 22 is R
A blanking signal 22a, which is composed of an OM or the like, and which 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 TCI signals 16a and 17a, the TCI information signal 20a, the correction signal 21a and the blanking signal 22a relating to the picture are selected as the third and fourth selecting means 18, respectively. 19 is the first obtained by selecting
The second recording signals 18a and 19a are transferred to the D / A converters 23 and 2
4 to the emphasis means 25 and 26, respectively.

The emphasis means 25 and 26 emphasize the high frequency components in the horizontal direction. Then, the output signals of the emphasis means 25 and 26 are set to the limiter means 2
After the amplitude is limited by 7, 28, FM modulating means 29, 3
At 0, a signal which can be modulated by a predetermined deviation is amplified to a predetermined level by a recording amplifier (not shown), and recorded on the magnetic tape TT via the magnetic heads 1A and 1B and the magnetic heads 2A and 2B, respectively. ing.

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 TCI signal 18a relating to the even-numbered line is output from "SW" to "556 (1) shown in FIG. 8A by using the magnetic head 1A arranged on the rotary drum. / 2) ”, and the magnetic head 1B is used to record“ 5 ”shown in FIG. 8 (A).
It is recorded on the tracks from "56 (1/2)" to "1118". On the other hand, the second recording T related to the odd-numbered line
The CI signal 19a is output from "SW" to "5" shown in FIG. 8A by using the magnetic head 2A arranged on the rotating drum.
57 (1/2) ”, and the magnetic head 2B is used to record“ 557 ”shown in FIG. 8A.
(1/2) ”to“ 1119 ”are recorded. In addition, the magnetic heads 1A arranged close to each other,
2A or magnetic heads 1B and 2B perform simultaneous recording,
As will be described later, the voice magnetic head 3A preceding this,
The audio tracks A and B in FIG. 8A are formed by 3B. Of course, the magnetic tape pattern shown in FIG. 8B can be obtained by appropriately setting the mounting heights of the magnetic heads 1A, 2A, 1B and 2B and the audio magnetic heads 3A and 3B.

Now, the W-NT mode for recording one program of the NTSC signal at the tape running speed for a long time and the N-mode
The 2NT mode in which two programs of the TSC signal are recorded at the standard tape running speed will be described. In the W-NT mode, the tape running speed is changed to 1/3 times the standard tape running speed, NTSC signals for one field are recorded on each track shown in FIG.
In the T mode, the NTSC signal for one field is subjected to a predetermined process and recorded for each program on each track relating to the video signal shown in FIG. 8 at the standard tape running speed.

In FIG. 3, the transmission line (not shown)
The second NTSC signals dd and ee are the AGC means 12, 13
The amplitude level is corrected based on the level reference signal in the information signal relating to the output signals of the A / D converters 12 and 13 and then the first and second signals are supplied via the A / D converters 12 and 13. The second NTSC signals dd and ee are converted into conversion means 14 and 1.
5 is supplied. The conversion means 14 and 15 are the third Y, PB and PR signals 14a and 14 which have been subjected to predetermined arithmetic processing.
b, 14c and the fourth Y, PB, PR signals 15a, 15
b and 15c are supplied to the first and second selecting means 8 and 9. In the W-NT mode, the second NTSC signal ee
The configuration according to does not work.

Then, the third Y, PB, PR signals 14a, 14b, 14c and the fourth Y, PB, PR signals 15a, 15b, 15c are selected by the first and second selecting means 8, 9. And supplied to the first and second TCI conversion means 16 and 17, respectively. In the case of the above HD signal, PB,
The PR signal was subjected to the line-sequential processing, but in the case of the NTSC signal, the line-sequential processing is not performed because the number of scanning lines is small.
PB, PR signals 14b, 14c and fourth PB, PR
Signals obtained by compressing the signals 15b and 15c on the time axis,
A signal obtained by compressing the third Y signal 14a and the fourth Y signal 15a on the time axis is time-axis multiplexed to perform first and second TCI.
The signals 16a and 17a are obtained.

Then, the first and second TCI signals 16
a, 17a, the TCI information signal 20a, the correction signal 21a, and the blanking signal 22a, the third and fourth selecting means 1
8 and 19 are selected to obtain the first and second recording signals 18a and 19a shown in FIGS. Also,
The magnetic tape pattern on which the first and second recording signals 18a and 19a are recorded is as shown in FIG. Incidentally, FIG. 6B shows a magnetic tape pattern in the W-NT mode.

In this way, in any of the W mode, the W-NT mode and the 2NT mode, the magnetic tape TT in which a plurality of kinds of correction signals having a fixed relationship with the time code signal in the information signal are sequentially recorded is prepared. can do.

Next, the audio signal recording system according to the gist of the present invention will be described in the W mode, the W-NT mode, and finally the 2NT mode. First, in the W mode, as described above, the information signal inserted in the input HD signal includes audio information as a data signal.
This audio information is information related to the format of voice,
As described above, it is information for identifying stereo sound, monaural sound, bilingual sound, and the like. Then, A / in FIG.
The output signal 4a of the D converter 4 is separated as an information signal, supplied to the information signal generating means 20, subjected to the above-described predetermined processing, and inserted into the data signal related to the TCI information signal 20a. Then, this TCI information signal 20a is subjected to the above-mentioned signal processing, and is passed through the magnetic heads 1A and 1B and the magnetic heads 2A and 2B, and then the TCI information signal "DA" on the tape pattern of the magnetic tape TT shown in FIG. 8A. Will be recorded in.

The input sound signal ww for the right sound (Rch) and the input sound signal xx for the left sound (Lch) are supplied to the sound signal recording processing means 80, 81. Here, the audio signal recording processing means 80, 81 is configured to input the audio signal ww,
An amplifier (not shown) that amplifies xx by a predetermined level, a noise reduction circuit (not shown) that reduces the noise level of an audio signal output from this amplifier to a predetermined level or less, an audio signal output from this noise reduction circuit And a pre-emphasis circuit (not shown) for increasing the high frequency component of the signal by a predetermined amount. The audio signal output from the pre-emphasis circuit (not shown), that is, the audio signal output from the audio signal recording processing means 80 and 81 is F.
The signals are supplied to the M modulators 82 and 83, respectively, and are converted into signals whose center frequencies are 1.7 MHz and 1.3 MHz and whose deviation is ± 150 kHz. The FM audio signals output from the FM modulators 82 and 83 are respectively amplified to a predetermined level by a recording level adjuster (not shown) and supplied to the magnetic heads 3A and 3B as mixed FM audio signals by the adder 84. It is recorded on audio tracks A and B in 8 (A).

When recording a broadcast MUSE signal, the MUSE signal is generated by the MUSE decoder (not shown) as the audio information signal vv inserted in a predetermined line of the MUSE signal, and Y , PB,
PR signals aa, bb, cc are generated and these signals are supplied to this signal recording / reproducing apparatus.

Next, the recording system of the audio signal in the W-NT mode and the 2NT mode will be described. In the W-NT mode and the 2NT mode, the first and second NTSC signals dd and ee are input to the AGC means 10 and 11 shown in FIG. 3, respectively, and at the same time, the audio information is A / D converters 12 and 13. Are supplied to the data signal generating means 202 as the output signals 12a and 13b, and the two-channel input sound signals ww and xx are supplied to the sound signal recording processing means 80 and 81, respectively.

First, in the W-NT mode, the tape running speed is changed to 1/3 of the standard tape running speed as described above, and the video signal is transferred to the track shown in FIG. The data is subjected to a predetermined process and recorded. The audio information signal vv is used as the above-mentioned data signal 202a in the error correction signal generating means 20.
4, the data signal is subjected to the above-mentioned signal processing, and is passed through the magnetic heads 1A and 1B and the magnetic heads 2A and 2B, and the TCI information signal "DA" on the tape pattern of the magnetic tape TT shown in FIG. Will be recorded in. At this time, the input audio signals ww and xx are recorded on the tape pattern of the video signal shown in FIG.
That is, the input audio signals ww and xx of the two channels are subjected to recording processing and FM modulation in the same manner as in the W mode described above, and are converted into signals having center frequencies of 1.7 MHz and 1.3 MHz and a deviation of ± 150 kHz. To be done.
Then, these signals are frequency-multiplexed and the magnetic head 3
Deep recording is performed on the magnetic tape through A and 3B, respectively.

In the 2NT mode, as described above, the NTSC signal for one field is subjected to a predetermined process on each track relating to the video signal shown in FIG. At this time the first
The audio signal according to the program is subjected to recording processing and FM modulation as in the W mode described above, and the center frequency is set to 1.
7MHz, 1.3MHz, the deviation is ±
Converted to a signal of 150 kHz, while the audio signals for the second program are 2.7 MHz and 2.3 MHz.
And the deviation is converted into a signal having a deviation of ± 150 KHz. Then, these signals are frequency-multiplexed and recorded on the magnetic tape via the magnetic heads 3A and 3B, respectively.

Here, the audio information signal vv and the input audio signal w supplied to the above audio signal recording system.
w and xx are supplied to this signal recording / reproducing apparatus together with the NTSC signal. As is well known, domestic terrestrial audio multiplex TV
In broadcasting, a subcarrier that is AM-modulated by a voice mode signal to a main carrier that FM-modulates a voice signal (a subcarrier that is about 55 kHz away from the main carrier, a 982.5 Hz stereo voice mode signal, and a 922.5 Hz bilingual language) This voice mode signal does not exist in the voice mode signal and monaural voice), and the multiplexed voice and the NTSC signal are broadcast.

In the W-NT mode, the first tuner receiving this audio multiplex TV broadcast receives the audio signal identified by the first NTSC signal dd and the audio mode signal from the transmission path (not shown). The information signal vv and the input audio signals ww and xx are supplied to this signal recording / reproducing device.

Further, in the 2NT mode, the first and second tuners receiving this audio multiplex TV broadcast receive the first and second NTSC signals dd and ee from the transmission line (not shown) and the above-mentioned audio mode. The audio information signal vv identified from the signals, the first input audio signals ww and xx, and the audio signal recording system having the same configuration as the audio signal recording system of the first input audio signals ww and xx. And a second input audio signal to the signal recording / reproducing apparatus.

(Playback System) The playback system will be described from the W mode with reference to FIG. In the figure, the magnetic tape TT
The signals reproduced using the magnetic heads 1A and 1B and the magnetic heads 2A and 2B are amplified to a predetermined level by a preamplifier (not shown), and then F is demodulated by the FM demodulation means 40 and 41.
M demodulation is performed. Then, after the output signal is attenuated by the de-emphasis means 42, 43 having a complementary relationship with the emphasis means 25, 26, the high frequency components in the horizontal direction are attenuated, and then passed through the A / D converters 44, 45. The obtained first and second reproduction signals 44a and 45a are corrected by the correction means 46 and 4.
7 is supplied.

The correction means 46 and 47 have the correction signal 2
Second control signals 48a and 49, which will be described later, indicating the type of 0a.
The first and second reproduction signals 44a and 45a are corrected in accordance with a. However, it is not necessary to provide a configuration corresponding to all types of correction signals, and it is sufficient to support a predetermined correction signal depending on the application or grade. In order to perform the correction corresponding to the above-mentioned first to third correction signals 210a, 211a, 212a, for example, instead of the first control signal 201a, the second control signal 48 is supplied to the above-mentioned correction signal generating means 21.
a, 49a are supplied to generate a normal correction signal, and the normal correction signal and the reproduced correction signal are level-compared by a comparison means (not shown), based on the difference It is sufficient to correct the two reproduced signals 44a and 45a.
The output signals of the correction means 46 and 47 are output to the TCI discrimination means 50 and 51 and the first and second TCI inverse conversion means 56 and.
57.

The TCI discriminating means 50, 51 holds the level of the reproduced TCI information signal 20a of "0" or "1" for the period t2 or t3 in FIG. Discrimination signals 50a, 5 which are used as threshold values and have level information for level reference signals.
1a is supplied to the correction control means 48, 49 and the generation means 52, 53.

Here, the correction control means 48 and 49 will be described. Since both have the same configuration, the correction control means 48 will be described in detail. The discrimination signal 50a is supplied to the TCI division means 480, and like the division means 201 described above, a signal representing the remainder obtained by dividing the time code related to the time code signal in the discrimination signal 50a by “Q = 5” is selected. Supply to the means 483. The selecting means 483 plays a role of excluding the output signal of the TCI dividing means 480 which is inappropriate as the second control signal 48a, and does not operate when the correction signal is not recorded or the information signal is incorrect. Exclude from the second control signal 48a as deemed appropriate. That is, the error detecting means 481 detects an error in the information signal by using the above-mentioned error correction signal, and supplies "0" to the selecting means 483 when it is correct and "1" when it is correct. Further, the correction signal information discriminating means 482 extracts the correction signal information from the information signal, and when the correction signal is not inserted, "0" is inserted, and when it is inserted, "1" is input to the selecting means 483. Supply. Then, the selecting means 483 sends the second control signal 48a to the correcting means 46 only when both are "1".
Is being supplied.

Further, the generating means 52 extends the time axis of the discrimination signal 50a to generate an information signal and supplies it to the selecting means 63. Then, the selecting means 63 inserts the information signal in the line 603 of the Y signal. The generating means 53 will be described later because it is used in the 2NT mode. On the other hand, the first and second TCI
The inverse conversion means 56 and 57 have a complementary relationship with the above-mentioned first and second TCI conversion means 16 and 17, and extend the compressed luminance signal and the compressed line-sequential color signal on the time axis and at the same time output the line-sequential color signal. Demodulate and reproduce the first reproduction Y, PB, PR signals 56
a, 56b, 56c and second reproduction Y, PB, PR signal 5
7a, 57b, 57c and these signals are
The signal obtained by synthesizing the signals relating to both systems is supplied to the synthesizing means 62 via the sixth selecting means 58 and 59, and is sent to the selecting means 63 and the D / A converters 64, 65 and 66. The output Y, PB, PR signals ff, gg, hh are output to a transmission line (not shown).

Next, the W-NT mode for reproducing one program of the NTSC signal at a tape running speed for a long time and the NTSC
2N to play back two signals at standard tape running speed
The T mode will be described.

In the W-NT mode, the magnetic head 1
Only the systems related to A and 1B operate, while the systems related to the magnetic heads 2A and 2B also operate in the 2NT mode. Then, the TCI inverse transforming means 56 and 57 perform inverse transforming means on the signals obtained by expanding the time-axis compressed Y, PB and PR signals respectively on the time axis through the fifth and sixth selecting means 58 and 59. Supply to 60 and 61. And the inverse conversion means 60,
The composite video signal generated and obtained at 61 is selected by the selecting means 54, 5.
5, the first and second output NTSC signals ii, jj obtained by inserting the information signals supplied from the generating means 52,53 into the 19th line of the composite video signal are passed through the D / A converters 67,68. Is output to a transmission line (not shown).

Thus, in any of the W mode, the W-NT mode, and the 2NT mode, the magnetic tape TT on which a plurality of kinds of correction signals having a fixed relationship with the time code signal in the information signal are sequentially recorded is reproduced. Then, a predetermined correction can be applied.

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 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.

Next, an audio signal reproducing system will be described.
The voice signal is a band pass filter 85 as an FM voice signal converted into an electric signal by the voice heads 3A and 3B.
Is supplied to 86. This band pass filter 85, 86
As described above, the center frequencies are carrier waves 1.7 MHz and 1.3 MHz, which are modulated FM-modulated audio signals at the time of recording the audio signals, and the FM audio signals are separated into two channels. And FM separated into each channel
The first and second reproduced voice signals 87a and 88a obtained by demodulating the voice signal by the FM demodulating means 87 and 88 are supplied to the seventh selecting means 89. Also, the seventh selecting means 89
To the discrimination signal 50 output from the TCI discrimination means 50.
supply a. Here, the discrimination signal 50a reproduced by performing the above-mentioned predetermined processing is supplied to the seventh selecting means 89 as the audio information. Then, the seventh selecting means 89 selects the first and second reproduced audio signals 87a and 88a by the audio information and the output audio control signal 89a set by the operator in advance for switching the child, The first and second output audio signals yy and zz are output to a transmission line (not shown).

That is, when the output voice control signal 89a represents only the main voice (Japanese), the first reproduced voice signal 87a relating to the main voice is converted into the first and second output voice signals yy,
Automatically select as zz. On the contrary, when only the sub-audio (English) is shown, the second reproduction signal 88a relating to the sub-audio is generated.
Is selected as the first and second output audio signals yy and zz.

Further, since the audio signal reproduced by the audio information can obtain information for identifying stereo audio, monaural audio, or bilingual audio, desired audio effects can be obtained for each of the above audio modes. By setting, it becomes possible to automatically switch and output this audio effect for each reproduced audio signal.

Next, a video display device BB such as a TV and an AV amplifier CC in which the VTR AA comprising the signal recording / reproducing device which constitutes the present invention has a data line decoder built therein
A case where the output HD signal and the audio signal are supplied to is described with reference to FIG. The video display device BB such as a TV and the AV amplifier CC having the built-in data line decoder shown in the same figure are provided with various special sound effect modes selected by the operator. For example, in the video display device BB, the main language of bilingual audio is used. When this special sound effect mode is preset to output sound (Japanese), the data line decoder detects a bilingual sound judgment signal from the audio information from the output HD signal, and the video display device. The BB can automatically output the main voice of the bilingual voice (FIG. (A)). Similarly, for example, when a special sound effect mode is set in advance so that stereo audio is converted into a so-called surround sound having a spread in the AV amplifier CC, the data line decoder detects the audio information from the VTR AA. However, if this audio information is a stereophonic discrimination signal, A
The V amplifier CC can automatically output surround sound ((B) in the same figure).

Although the dividing means 201 and the TCI dividing means 408 are used as an example for specifying the type of the correction signal from the time code signal in the above-mentioned embodiment, the present invention is not limited to this. Of course, it is only necessary to sequentially generate one correction signal from a plurality of types of correction signals based on the property of the time code signal that it advances in every one field or one frame.
In order to sequentially generate the three types of correction signals from the types of correction signals, a ROM that uses the first word in the time code signal representing the field or frame information as an input signal may be used. For example, two types of correction signals may be used. In order to sequentially generate one type of correction signal from the signal, it is sufficient to specify it by the least significant bit of the first word.

In the above-described embodiment, the output signals of the correction means 46 and 47 are used as the input signals of the TCI determination means 50 and 51 in order to discriminate the information signal from the corrected signal, but the A / D converter is used. Of course, the output signals of 44 and 45 may be used as the input signals. In the above-described embodiment, among a plurality of types of correction signals, the grayscale signal (for example, ternary value) for adjusting the DC level and the amplitude level between the two systems is particularly important as compared with other correction signals. In consideration of the fact that the time code signal is a signal, the first control signal 2
It is needless to say that the error occurs when 01a is "0", and it may be always recorded at the start of recording.

In the above embodiment, the video signal recording / reproducing apparatus uses the VTR as a 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.

[0071]

As described above, the signal recording apparatus according to the present invention, in particular, has dividing means for deleting upper and lower lines including a predetermined line having audio information relating to a video signal and for dividing the video signal into two systems. , The first and second divided signals output from the dividing means are subjected to predetermined signal processing, respectively.
Second signal processing means, first and second selecting means for extracting audio information from a predetermined line related to the video signal, and inserting the audio information into output signals of the first and second signal processing means, First and second
And the first and second video signal recording means for recording the first and second video recording signals output from the selecting means on the recording medium, the vertical synchronizing period and the like unrelated to the pattern are time-compressed. There is an effect that it is possible to create a recording medium having audio information for identifying the format of an audio signal while improving the utilization efficiency of the recording medium.

As described above, in the signal reproducing apparatus according to the present invention, in particular, the discriminating means for discriminating the audio information from the reproduced video signal, the discrimination result of the discriminating means and the output of the preset audio signal. Since the audio signal selecting means for selectively outputting the first and second audio signals reproduced based on the format information is included, the audio signal can be automatically selected in a desired output format. For example, stereo audio Therefore, there is an effect that it is possible to prevent Japanese and English from being output at the same time by voice information such as voice in two languages.

[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 flowchart for explaining the operation of the modulation means.

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

FIG. 8 is a tape pattern in W mode.

FIG. 9: TC in W-NT mode and 2NT mode
It is a waveform diagram of an I signal.

FIG. 10 is a tape pattern in 2NT mode.

FIG. 11 is a block diagram illustrating a main part of a video signal reproducing device according to an embodiment of the present invention.

FIG. 12 is a block diagram for explaining a main part of a video signal reproducing device which constitutes the present invention.

[Explanation of symbols]

7 division means 16,17 TCI conversion means (first and second signal processing means) 18,19 third and fourth selection means (first and second selection means) 50,51 TCI discrimination means (discrimination means) ) 80, 81 audio signal recording processing means (audio signal recording means) 89 seventh selecting means (audio signal selecting means) 7a, 7b, 7c first Y, PB, PR signals (first divided signal) 7d, 7e, 7f 2nd Y, PB, PR signal (2nd division signal) 18a, 19a 1st, 2nd recording signal (1st, 2nd video recording signal) aa, bb, cc Input Y, PB , PR signal (video signal) ww, xx Input audio signal (first and second audio signal) TT Magnetic tape (recording medium)

Claims (2)

[Claims] 1. A signal recording device for recording a video signal in which audio information for identifying a format of an audio signal is inserted in a predetermined line and a first and a second audio signal, the video signal Related to the above, the upper and lower lines including the predetermined line are deleted, and the dividing means divides the video signal into two systems, and the first and second divided signals output from the dividing means are respectively subjected to predetermined signal processing. First and second signal processing means, and first and second means for extracting the audio information from the predetermined line related to the video signal and inserting it into the output signals of the first and second signal processing means. Selecting means, first and second video signal recording means for recording the first and second video recording signals output from the first and second selecting means on a recording medium, and the first and second video signal recording means. Audio signal recording means for recording the audio signal of No. 2 in the recording medium. No. recording device. 2. A signal reproducing apparatus for reproducing a recording medium on which a video signal in which audio information for identifying the format of an audio signal is inserted and a first and a second audio signal are recorded. Video signal reproducing means for reproducing the video signal, audio signal reproducing means for reproducing the first and second audio signals, discriminating means for discriminating the audio information from the reproduced video signal, and the discriminating means. Signal reproduction means for selectively outputting the first and second audio signals reproduced on the basis of the result of the determination and the preset information on the output format of the audio signal. apparatus.