JPS5972612A - Sub-code signal generator - Google Patents

Abstract

PURPOSE:To generate simply and accurately a sub-code for main code encoding by generating a marking signal of a specific code in response to the increment of an index of the main code. CONSTITUTION:In operating a key 202 of an operating section 200 of a keyboard of a sub-code generator, the marking mode is designated. When a key 204 is operated in this mode and the index of the main code is incremented, the corresponding specific code is generated as the marking signal and recorded on a VTR tape. The automatic forming and processing of the sub-code based on the marking signal by the read mode, program save mode and the program load mode and the like is attained easily by using the specific code, and the subcode for main code encoding is generated simply and accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a disc record master recording device suitable for, for example, a CD (optical compact disc) type DAD (digital audio disc), and particularly relates to a sash code signal thereof. Concerning improvements to generators.

[Technical background of the invention and its problems]

Recently, in the field of audio equipment, digital recording and reproducing methods that utilize PCM (Russian code modulation) technology are being adopted in order to achieve high fidelity recording and reproducing as much as possible.

In fact, this is what is called de nocle audio, and the audio characteristics do not depend on the characteristics of the recording medium, and are significantly superior to those using conventional analog recording and playback methods. This is because it is established in principle that

In this case, a system that uses a disk as the recording medium is called a DAD system, and optical, electrostatic, and mechanical recording and reproducing methods have been proposed. Regardless of which method is adopted, the disk record master recording device that embodies the method is required to be able to satisfy various advanced functions and performances that cannot be found in conventional devices. ing.

In other words, taking the CD system as an example, this type of DAD disk record master recording device produces a master disk for mass production of disk records used at the end, just like a normal disk record master recording device. In this case, it is not done by conventional cutting but by optical method using laser light.
It is necessary to encode subcode signals used for various displays and controls in advance with respect to the music signal which becomes the main code signal after CM processing.

Here, the subcode signals are P, Q, ...w-1
There are eight birch types, but currently two types, P signal and Q signal, are used.

Among these, the P signal is '0'' during the song and '1'' between songs.
, and there is no interval between songs, so even if the sleeves change, it will last for a certain period of time.
', and 1'' II Q II are repeated alternately in the lead-out area after the final song.

The Q signal is the number of the song currently being played (TNO: ) rack number) the index indicating the subdivision within one song (X) the elapsed time between two songs and the time since the beginning of the first song. It is used to display absolute time.

This Q signal is a table of contents (TOC) that includes the absolute time, maximum and minimum number of songs, etc.
), and together with the above-mentioned P signal, it is used to facilitate random searches of recorded songs.

To record onto a master disc, generally a so-called PCM processor and a VTR (video tape recorder) are used to convert the music signal into PCM and record it onto a V'l'R tape. The reproduced signal is applied to the PCM processor again to derive a predetermined digital signal (main code signal), which is converted to a signal format such as the 9CD system by an encoder to control the output of the master recorder. It is offered to

At this time, it is necessary to simultaneously encode the sub-code signal with respect to the above-mentioned main code signal so that it is recorded on the master disc together with the music signal.

For this reason, conventionally, when playing a VTR tape containing a music source, the starting time of the song was measured using a clock and inputted into the subcode generator before recording the master, and then the subcode generator was run again at the time of recording. By driving it, a subcode signal was generated and encoded into the main code signal from the VTR tape.

However, in this type of subcode signal encoding system, the premise is to measure the start time of a song by listening to music on a VTR tape, so it is difficult to actually measure the start time of a song by listening to music on a VTR tape. They have the serious drawback that their mental time tends to be inaccurate and their operations are extremely complicated.

[Purpose of the invention]

Therefore, this invention has been made in view of the above points, and has been improved so that the subcode signal to be encoded into the main code signal that has been converted into PCM in advance can be generated accurately and with simple operation. The purpose is to provide a subcode signal generator.

[Summary of the invention]

That is, the subcode signal generator according to the present invention has the following features:
a first means for performing a marking mode for recording a desired marking signal corresponding to the main code signal at a predetermined position on an audio track of a videotape on which a PCM main code signal is recorded in advance on the video track; a second means for performing a read mode for reproducing the videotape on which the marking mode has been recorded by the first means and measuring the generation time of the reproduction marking signal; a third means for performing a program save mode for recording at the beginning of the audio track of the videotape; and reproducing the videotape on which the measured time data is recorded by the third means; a fourth means for performing a program load mode for generating and storing a sash code signal corresponding to the main code signal; and a fourth means for performing a cutting mode for transmitting the sash code signal generated and stored by the fourth means. and sixth means for performing a program 2 check mode for checking the subcode signal data generated and stored by the fourth means,
The present invention is characterized in that it is configured to be able to generate a specific coded marking signal to be marked when incrementing an index in at least one unit of the main code signal in the marking mode.

[Embodiments of the invention]

Hereinafter, a case in which the present invention is applied to a CD system will be described in detail as an embodiment of the present invention with reference to the drawings.

That is, in FIG. 1, 11'0 is a commercial VTR, and a music signal to be the main code signal to be recorded is recorded in PCM in a predetermined format on the video track of V'l'R11θ. It is assumed that videotape 0 is loaded.

Then, the video output terminal T+ of the VTRj 10 is connected to the encoder 1 via the PCM tree 111.
12 main code signal input terminals T2.

It's a size, I 1 ;? )j: Control circuit 11 consisting of a subcode signal generator, for example a microcomputer, etc.
4, a keepad 115 for supplying various control signals to the control circuit 114, a display 116 for displaying various output signals from the control circuit 114, and an audio signal for the control circuit 114 and the VTrt 7/0. It has two input/output interfaces 117 and 118 interposed between the track recording input terminal T3 and the audio track reproduction output terminal T4.

Here, the control circuit 114 selects the key? -Do 115
A marking signal generator 114a generates a marking signal (to be described later) in response to instructions from a subcode signal storage unit 114b that stores various data generated as a subcode signal, and a subcode signal storage unit 114b stores various data generated as a subcode signal. It has a time measurement circuit section 114c that performs measurement and a time chart creation section 114d that creates a predetermined time chart, which will be described later, based on the output from this time measurement circuit section. It is configured to be able to generate subcode signals such as the TOC signal, P, and Q signals described above based on the time chart.

A subcode signal output terminal T5 of the subcode generator 113 including the control circuit 114 is coupled to a subcode signal input terminal T6 of the encoder 112.

The encoder 112 is configured to encode the subcode signal into the main code signal and perform necessary encoding processing according to the CD format (for example, EFM: Eight-Fourteen Modulation), and outputs the master recording signal. It is assumed that the end T7 is coupled to a laser beam modulation section of a master recorder (not shown in FIG. 1).

To explain the operation of the above configuration, first it is necessary to perform a marking operation.

That is, although this marking is basically placed at the beginning and end of a song, it may also be placed at a break in the song when an index (X) signal is taken into account.

Also, markings are required to indicate the start and end points of a disc record.

These markings may be a single signal, for example, a sine wave signal of a constant frequency, but in consideration of ease of subsequent processing, it is preferable to use different signals.

Therefore, as a marking signal to be actually used, an American code defined as, for example, the following may be FM-modulated and used.

■ Disc play start point...A ■ Disk play end point...B ■ Start of song...................................................C
The marking signal is generated by the marking signal generator 114a in the control circuit 114 in response to key operations on the keyboard 115 attached to the subcode generator 113 for the purpose of use. VTR110
This will be done in the playback mode, but in this case, the audio track of the video hoop will be in the recording mode (dubbing).

In other words, by playing back the V'l'R110, the music signal recorded as PCM on the video track of the video tape can be transferred to the PC.
The marking operation is performed by operating the keyboard 115 to record a necessary marking signal on the audio track of the videotape while listening on the monitor 119 through the M processor 11.

In this case, each marking signal, which is FM modulated using the ASCII code as described above and is generated from the marking signal generator 114Q in the control circuit 114 in response to key operations on the keyboard 115, is transmitted to the VTR 111 via the input/output interface 117. will be recorded on the audio track of the videotape.

When all the marking operations are completed as described above, the VTRZ 10 is put into the playback state again and the time n1 is reached.
The measurement will be performed. In this case, it goes without saying that the audio track of the videotape is in a playback state.

Input/output interface 1 for audio track playback output (marking signal) from VTRI JO
The time measurement circuit section 114 in the control circuit 114 via 18
c and shi, the time between each marking point from the starting point of the disc performance is measured.

Next, when the above-described time measurement operation is completed, the time chart creation section 114d in the control circuit 114 starts to display a time chart creation operation according to each marking.

tp, based on the time chart created in this way, a TOC signal, which becomes a subcode signal, is generated, and initial data for P signal or Q signal generation is also set, and the storage section in the control circuit 114 is stored. It is something that will be remembered.

In this case, it is also possible to input data from outside as necessary.

With the above steps, the preparation operation for generating the subcode signal is completed, and then the master recording operation is finally performed.

That is, to put the VTR 110 into the reproduction state again, the subcode generator 113 first repeatedly generates the TOC signal and increments it by -1. Then, when a marking signal for starting a performance recorded in advance on the audio track of the VTRJ 10 is input to the sub code generator 113, a sub code is generated 511. v is stored in the storage section 114b of the control circuit 114 in advance.
The P signal and the Q signal are generated as subcode signals stored in the subcode signal (this also applies to the generation of the TOC signal).

By the way, the video output from VTR110 is PCM 7.
A predetermined digital (No. II) main code signal is input to the encoder 112 via the encoder 111, and at the same time, a necessary subcode signal is automatically generated from the subcode generator 113. By inputting the subcode information to the encoder 112, the subcode information is encoded into the main code signal.

The encoder 112 then performs necessary encoding processing such as EFM and outputs a master recording signal.

By the way, although it is possible to record a master disc by accurately and simply encoding it into a code signal as described above, and it is effective in its own way, each of the above-mentioned problems is required each time a master recording is performed. This is inconvenient because it requires a lot of movement.

One! , υ, this is because subsequent master recordings cannot be made unless each of the above-mentioned operations, except for the first marking operation, is repeated each time for one roll of videotape.

Therefore, in order to eliminate such inconvenience, it is necessary to use the time chart data obtained in the time chart creation operation, which is the substantial final operation of generating the subcode signal in each operation of the first master recording described above. The beginning part of the audio track of the videotape, that is, the part before the first marking signal is recorded (this is necessarily the PCM recorded on the video track).
It is only necessary to perform the initial data recording operation so as to record the recorded music signal in the recording part (the former part is also the former part).

In this way, if time chart data is recorded in advance at the beginning of the audio track for one videotape, no matter how many times the master recording is performed, the time chart data can be recorded without having to perform the above-mentioned operations again. It is very convenient because it can read the chart data and immediately generate the subcode signal necessary for recording the master disc.

However, in the above-described marking operation, it is difficult to accurately mark a desired position, so sometimes it is easy to put a mark in the wrong position.

Further, even if it is possible to accurately mark a desired position, for some reason it may be desirable to change the position (particularly the position at the beginning and end of the song).

Therefore, in such a case, it would be convenient if the marking position could be corrected without having to restart the marking operation again.

Next, to explain the marking correction operation that can meet such a request, the correction can be made by first reading out the time chart data recorded at the beginning of the audio track on the video tape and displaying it on the display 116. good.

In this case, since the time chart data is displayed as the measurement time of each marking point, it is only necessary to change the marking time and marking type to the desired ones by operating the keyboard 115, and based on the result of this modification, the tube code signal can be changed. It is something that causes it to occur.

Next, a specific example of the subcode generator 11.9 in the above will be explained, but before that, the subcode of the CD system (
In particular, examples of P and Q) will be explained.

■Frame structure The frame structure of the subcode is as shown in FIG. One subcoded block includes 98 subcoded symbols.

The repetition frequency of one block is 75 Hz.

The first two sub-coded symbols are the SO and Sl sub-code period turns.

■Channel P Channel P i-J is a flag bit indicating the start of a musical tone piece according to the following code rule.

Musical tone p=.

Start flag P=1
At the minimum length of the nog, 2 seconds, the end of the encoded start flag provides the start of the next musical note. If the actual nail length is greater than 2 seconds, the start flag length will give the actual nail length.

Q) Channel P in the channel P in the lead intratrack is encoded as a music track. 11. The first piece of music leads to the start flag for 2-3 seconds. Ru.

Q)-2 Lead-out Track The lead-out track is guided by a 2-3 second start flag (the first point on the screen is the beginning of the lead-out track. It stays at zero for 2-3 seconds, and the next P switches between O and 1 with a rhythm of ZH7±2% (duty ratio 50±10%). Channel P can only be changed after the sub-symbol synchronization patterns SO, S1. Channel The encoding of channel P is delayed by one subcode block with respect to the encoding of channel Q.

■Channel Q The normal data format of channel Q is as shown in FIG.

(2)-1 control: Sent MSB first with 4 flag bits for channel number and emphasis 0N10FF.

0000...Indicates 2 audio channels without groove/emphasis.

1000...Indicates 17 4 audio channels with emphasis →-X001...Brie emphasis 50/1.5μ
5 (71) 2 or 4 audio channels.

Focus/emphasis flux (control) bit 4) of control block is less Between the two seconds of actual nailing. can be changed.

@-2 address: MSB with 4 control bits for data Q
Sent from Jl, Ru.

(The MSB is always sent out first with 2-bit data.

@-4CR,C: Control, Address and Data Sent MSB first in a set of 16 bits CR,C on Q.

The parity bits are inverted on disk. The remaining part is checked to see if it is zero. Polynomial % Expression % ■The following three modes are defined for data Q.

A)-]mode Al)R=1=(0001) Mode 1 occupies at least 9 of the 10 consecutive sub-code blocks. Two different data types are possible in mode 1. The data format during the lead intratrack is as shown in FIG.

The data format between the music and lead-out tracks on the disc is as shown in FIG.

TNO: Expresses the music number in 2-digit BCD.

00: Lead intratrack The end portion of the lead intratrack is the starting diameter of the program area.

01-99: Music number The musical piece is preceded by a nail with the same musical number.

Music number play starts from a value of 01 and increases by 1. 1
When a program is stored on several disks, the numbers are assigned consecutively.

AA; Lead-out Track The lead-out track begins at the end of the last piece of music on the disc without a leading nail symbol.

X: Express the table of contents of the music number in two-digit ncD. Lead-in-rank period table of contents X is not valid.

00: Last-minute encoding The utilization of nails in Channel Q is to increase the length of the nails so that it can be said to be ``in all music.'' The first piece of music is 2 to 3 seconds long (see Channel P). The lead-out track is encoded as a musical tone.

01-99: Sub-division number lead-out track period X is ol. Musical piece (TNO)
=01~99, X''==00) In fD, the first value of X is 01. The value of

ZEZO: These 8 bits are zero OMIN, 5F
EC, FRAME: The running time in a musical piece is expressed in 6-digit BCD. Sunawaji, MIN, SEC and FR
, AME is 2 digits each. When the music starts, the time is set to zero. Time increases for the duration of the music and ends with a value of zero at the end of the nail. The lead-in and lead-out track opening times will increase. Minutes are MIN and seconds are SE
It is stored in C. One second is subdivided into 75 frames (
(running from 00 to 74) AMIN, ASEC, AFRAME: The running time of the disk is expressed in 6-digit BCD. AMIN, ASE
C and AFRAME each have two digits. At the start radius of the program area, the running time is set to zero and TNO contains the value of the first music on the disc. Minutes are AMI
N, the seconds are stored in ASEC. One second is subdivided into 75 frames (running from 00 to 74). POINT, PMIN, PSEC, PFRAME: During the lead intratrack, the contents of Table 1 are stored in these locations. The contents of this table are repeated continuously during the lead-in area (TNO=00). Items are repeated three times in each table.

At the end of the lead-in area, the contents of the table can be ended with any POINT value.

PMIN, PSEC and PFRAME give the music number starting point indicated by POINT. These values determine the starting position of the music in absolute time (AMI N ) with an accuracy of 1 second.

ASEC and AFRAME). The starting position of the music is the first position of the new music number, which is X00. If POINT = AO, the value of PMIN gives the first TNO on disk, and PSEC and PFRAME are zero.

If POINT = A +, the value of PMIN- forces the last TNO on Dinuk, psgc and PFRA
ME is zero. If 1) oINT = A 2, then
PMIN.

1) S1! The starting position of the lead-out track is pushed by HC and PFR IE. 81'! Table 1 shows an example of the encoding of a CD containing 6 songs on 1 disc.

)2 Mode 2: ADR=2=(0010) If mode 2 is presented, it occupies at least one of the 100 consecutive sub-code blocks. The data format in mode 2 is as shown in FIG.

N1 to N13: Disc catalog number expressed in 13-digit BCD. UPC/EAN code (BAR encoding) is used. The catalog number (number) does not change on the disc. If there is no catalog number encoded based on the UPC/FJAN code, N1-N13 can be all zero or mode 2 can be deleted from the disc.

ZERO: These 12 bits are zero AFRAMB: Continuation of APRAME in mode 1 (
00 to 74 trenches (2-digit BCD). During the lead-in area (TNO=OO), these 8 bits are zero.

(4)-3 Mode 3: ADR=3=(0011) If mode 3 is presented, it occupies at least one of the 100 consecutive blocks. Mode 3 is used to give unique numbers to musical pieces. This is l5R
This is done using C (Kokusai Raku semi-record code). I
SRC is determined by DIN-31-621. If ISR codes are not used, mode 3 must be deleted. Mode 3 for lead-in and lead-out tracks does not exist on the disc. The ISR code can only be changed immediately after the TNO is changed. The data format in mode 3 is as shown in FIG.

The 12 characters of the l5RC code are provided by ■1-112. The country code is given by ■1 to I2, and ■3
.about.5 gives the owner code, I6-I7 the record year, and 8-112 the record's serial number.

■Characters 1 to 5 are coded in 6-bit format according to Table 2. The digits 6 to 112 are 4-bit BCD numbers.

00: These 2 bits are zero ZERO: These 4 bits are zero AFRAME: Continuation of AFRAME in mote 1 (92 digit BCD running from 00 to 74). During the lead-in area (TNO=OO''), these 8 pits are zero.

■Channel # R, S + T, U + V r
W These channels are zero, no other data is allowed to be written into these locations.

FIG. 8 shows an example of the timing relationship of the P and Q signals on the disk.

Next, a specific example of the subcode generator 113 described above will be explained.

That is, FIG. 9 shows a panel layout diagram of the subcode generator 113, which has an operation key portion 200 corresponding to the round keyboard 115 described above and a display section 300 corresponding to the display 116. .

In this case, the operation key portion 200 includes P, IN keys 20, M, HIi; AD Goat-02, M, which are used in the marking mode and are displayed in the upper part of the figure.

CIANG key? o s'+ INDEX key, 2
174. P.

OUT key 205, M, END key 206I), VERIFY key 2.07. 5TAR, T key 2
o8.

5TOP ghee 209. and 0.211,212 for the number keys 2 from O to 9, which are displayed in the lower part of the illustration (however, from O to
6 is the same as 201 to 207 above) and 1 above.
~6 numeric keys 202 to 207 are also used as mode specification rv MA, RK -11' which has a display on the key itself
-, READ # -, 5AVE key.

It has LOAD #-, CUT key, CHECK key, and 5TEP key and ENTER key which are displayed in the lower part of the figure where the above 208 and 209 are also used.

i/j, the operation key part 20θ has a light emitting diode LE as a KYE MODE indicator in the upper and lower parts of the illustration.
I) I I LED2 is attached.

The display section 3o has a 2-digit MO display each having a display in the upper part of the figure, each consisting of a 7-segment light emitting diode.
DE display 3θ1, TNO display 302, index X display 303, MININ display 04,
SEC display 305, A, MININ display o e
, A, EEC display 307 and single digit A, FR
AME display 90B and N1 to N13 having a display in the lower part of the figure and serving as the respective displays 302 to 308;
(Catalog Number) CATALOGNUMBER
It has a display device.

Note that there is an MLJ between the operation section 200 and the display section 300.
Light emitting diodes LED8 and LED4 are attached as SIC and LEAD-IN indicators.

First, the usage mode 1 display mode of each of the operation keys and the display will be explained.

[P, IN key 201] This is the key operated at the beginning of the program area.

[M, HEAD key 202] This is the key operated at the beginning of the song.

[M, CHANG, key 203] This key is operated when changing songs without any pauses.

CINDEX key 204] This is a key operated when incrementing index X.

[P, OUT key 205] This is the key operated when entering the lead-out area at the end of the program area. -0 [: M=END key 206] This is the key operated at the end of the song.

CVERIFY key 207] This key is operated in the program save mode to compare the saved program information with the program information stored in the subcode generator and check whether it has been recorded accurately. .

[5TART key 208] This key is operated to start each of the read mode, program save mode, program load mode, and cutting mode.

[: 5TOP key 209] This key is operated to stop processing and wait for mode designation in read mode, program save mode, program load mode, and cutting mode.

[Numeric keys 0-9 201-207, 210-212]
TNO and Q signal mode of first song in read mode
- When entering data in 2 and checking the program (
This is the key operated when entering numbers in change) mode.

C5TEP key 208] TNO and Q signal mo of the first song in read mode
This key is operated when inputting de-2 data and when reading out and checking or changing program information written in advance in the program check (change) mode.

(ENTER key 209) TNO and Q signal mo of the first song in read mode
This key is operated to move the kernor (decimal point) one character to the right when inputting de -2 data and in program change mode.

Note that the operations required for each of the above-mentioned modes will be described later.

[MODFJ display 301] Displays each operation mode using numbers and alphabets. The 13 types of alphabets (
a) , (b) + (c) , (d) , (e) t
(f) , (h) , (i) + (j)0) +
(p) T (u) and (Q) are displayed in the form shown in FIG.

[TNO, X, MIN, SKC, A, MiN, A, 5F
JC, A, FRAME indicators 302 to 308] Track number TNO and index X in read mode, cutting mode and program check (change) mode, respectively.

The minutes and seconds of the song time MIN and SEC, the absolute time minutes from the beginning of the first song, seconds A, MIN, A, SEC, and the absolute frames A and FRAME are displayed in numbers.

[CATLOG NLIMBER indicators 302 to 308
] Displayed when inputting the catalog number of Q signal mode-2 in read mode (MTJSI
C display LED 3) Lights up when in the program area during cutting mode. .

[LEAD-IN indicator LED 4:] Lights up when in the lead-in area during cutting mode.

[KEY-MODE indicator LED, , LED2]
It lights up depending on which of the above-mentioned operation keys is in the upper or lower operation state.

Note that in the above, each operation mode is defined as follows.

[Marking (MARK) mode]

This mode is used to mark the beginning of a song on the video tag's audio track.

[READ mode]

This mode creates data necessary for generating a subcode (EFM) signal from a marking signal recorded on an audio track of a videotape.

[Program save (SAVE) mode] Subcode (
This is a mode in which data necessary for generating an EFM signal is recorded at the beginning of the audio track of a videotape.

[Program load (LOAD) mode] This is a mode in which data recorded at the beginning of the audio track of a videotape in the program save mode is read.

[Cutting (CUT, ) mode]

9-7' = r~do (EFM) Mode for generating the @ code As mentioned above, generate the subcode signal to be encoded into the main code signal, and then have the encoder perform the necessary encoding processing. This is the mode in which the master recording signal is derived.

[Program check (CHECK) (change) mode] This mode is for checking and changing the time at the beginning of a song, etc., which is necessary when generating the sub chord (EFM) signal.

Next, the actual operation of each operation mode will be explained based on a flowchart.

First, as shown in Fig. 11, by turning on the power, the system enters the mode specification waiting state (however, this state is also designed so that it always returns temporarily to this state even when each operation described later is completed. ) The system enters standby mode.

The mode specification from the standby state is 1 to
This is done by selectively operating operation keys for specifying each mode, which also serve as the number keys 202-206.

In this case, the correspondence between the numbers (keys) 1 to 6 displayed on the M'ODE display, q o 1, and the mode designation is as follows.

1 ・Marking mode 2...Read mode 3...Program save mode IS4...
Progeramuronide (LOAD) mode 5...Cutting (CUT) mode 6...Program check (
(change) (CHECK) mode, and the first specified is marking (MARK,
) mode, then P, IN, M, HEAD, M, CHANGE to be operated in marking mode.
.

The υ marking operation is performed by operating the INI)EX, I), OUT'+M, and END operation keys 201 to 206 in accordance with a check flow diagram of the relationship shown in FIG. 12, for example.

Furthermore, the M and END keys 206 operated at the end of the song are
P within 10 seconds after the key 206 is pressed.

When the OUT key 205 is operated, the operation of the corresponding key 206 is interpreted as P, the operation of the OUT key 205 is interpreted as P,
It is assumed that the operation of the OUT key 205 is ignored. However, this is the M, END key and P, O.
While operating the UT key, press M, HEAD key, yr, c
x, rANcE key is operated, it is removed.

In addition, the operation of the M, END keys before M, )IEAD can be omitted, but in this case, M, ENDu
For example, it is processed as if it were 3 seconds before MJIEAD.

Here, if the M, END key, M, HEAD key is pressed intermittently at a relatively fast cycle, the following message will appear (Fig. 13 (8)).
As shown in FIG. 2, for the former, if the intermittent operation time is less than, for example, 7 seconds, the last one will be accepted, and for the latter, if the total time of the intermittent operation is less than, for example, 10 seconds, the earliest one will be accepted.

If you wish to end (including cancel) the marking operation, you can operate the 5TOP key 209 to enter the standby state described above.

Furthermore, the M and HEAD key operations after P and IN may be omitted; in that case, for example, 3 seconds after P and IN, M
, HEAD are assumed to exist.

In addition, in the flowchart of FIG. 11, M shown on the right side
OT')E display 301 shows examples of display forms taken in each state (the same applies below).

Next, as shown in FIG.
) mode, which is used to read the marking signal marked on the videotape in the marking mode and create lead-in information (TOC data) and program information.

Therefore, it goes without saying that it is necessary to rewind the videotape to the first marking section before this.

Then, the TNO (usually 1) of the first song is entered by operating the numeric keys, and the TNO can be entered as follows.

For example, to enter °゛16'' as TNO, first press the number key °゛1'', then press the ENTER key,
Finally, all you have to do is press the numeric key "6", and the display format of the TNO display 302 during this time is shown in FIG. 15(a).
r (b), (c) vc shows yoninal.

If you enter the wrong number, press ENTER key 209
Press to move the cursor (decimal) point back to the upper digit, then press the correct number key.

When the TNO data input is completed, next operate the 5TEP key 20g to enable input of the catalog number, and enter the 13-digit catalog number in the same manner as the above procedure for entering the TNO.

When you have finished inputting the catalog number in this way, operate the 5TEP key 20B again (if you want the catalog number to be 0'', just operate the 5TpP key 20B immediately) to save the previously marked marking data. as a readable mode.

This mode is shown in FIG.
After TR110 is in play mode, press 5TART key 20B
All you have to do is operate the .

Then, when the reading is completed, operate the 5TOP key 209 (the same applies if you want to cancel).

If a reading error message (2E) is displayed during this time, simply rewind the VTR 110 and try the operation again.

In addition, syntactic error display due to mark mistake (2d
) is done, operate the 5TOP key 209 to enter the mode standby state, and then correct it in the program change mode described later, or just change the marking mode again and start marking again.

Next, as shown in Figure 17, save the program (SA).
VE) mode, but in this case, the videotape should be rewound to a point about 2 minutes earlier than the marked section.

Then, set the VTR7fO to the post-recording state and set it to 5TAR.
Operate the T key 208 to enter the writing state, and when the writing completion message is displayed, rewind the videotape to the part before writing, and then enter the play state and verify (V, ERI).
FY) mode and -.

As a result, when reading is performed and the reading completion display 3F appears, the VTRJ 10 is stopped and the 5TOP key 209 is operated.

In this case, if the reading error display 3E is displayed, the operation may be slightly repeated from the beginning.

Next, a case will be described in which a program load (LOAD) mode for reading data as shown in FIG. 18 is used.

In this case, the videotape is brought into the writing state in advance, and the 5TART key 208 is operated.

As a result, when the program area is executed and the load completion display is displayed, the VTRI JO is stopped and the 5TOP key 209 is operated.

Note that if the reading error display 4E is displayed during this time, the operation can be repeated again.

Next, the case of setting the program check (CHECK) (change) mode for data check as shown in FIG. 19 will be explained.

This is done by operating the 5TEP key 208 while checking the data, and if there is anything that needs to be changed during this time,
This can be done using the program change mode described later.

That is, in this program check (CHECK) (change) mode, program data is displayed one state (one instruction) each time the 5TEP key 20B is pressed, and the program data is changed as necessary.

FIGS. 20(a) to 20(h) show display examples of each data displayed by operating the 5TEP key 20B described above.

If you wish to change it, please refer to Figure 21 (a) l (b)
.

As shown in (c), use the ENTER key 209 to move the cursor (decimal point) to the part to be changed and press the number key to be changed (the figure shows M, HEAD).
A, 5EC14 seconds is 11 if the time is delayed by 3 seconds.
).

Next, cut (CUT) as shown in Figure 22.
The case where the mode is set will be explained.

In this case, after setting the videotape to a predetermined state for cutting, turn the VTR 7J o to H? - hold the 'CUT key 206 and S'l' ART key 208 to release the VTBIIO(r) pause state and start cutting, and the end of the program is displayed indicating that the cutting is stopped. If so, just operate the 5TOP key 209.

In this case, the data in the υ lead-in area is first output by operating the 5TART key 20B, and then the data in the VTR 2J
Enter P and IN data from O or 5TART key 2
By operation 08, the data in the program area is output, and finally, when the data in the program area (a) is completed, the data in the lead-out area is output. During this time, the MODE display,
MLJSIC display LED3 according to the display format of 901
, LEAD-IN indicator LED, the light indication state is as shown in FIG.

In addition, in Figure 2 (), (f) is M, CIANG,
This display appears when the interval between 02 seconds ago and M, END and M, and HEAD is less than 2 seconds. Similarly, in Fig. 20, the error display 6d in (h) is ignored during cutting, but if this display 2d appears at any other time, it is assumed that what is marked at the current time is a syntax error. , so you can correct it by considering the context.

Next, matters that can contribute to simplifying the configuration of the specific example described above will be described.

First, regarding the operation keys 200, some of the operation keys are P, IN key 201, which has a display in the upper part of the figure, which is used in the marking (MARK) mode.
M, HEAD key,? o 2, M, CHANG key 203. INDEX Ghee 2 Key 4, P, O
vER used when UT key 205゜M, END key 206 and program save (SAVE) mode
The IFY key zov is also used correspondingly to the number keys O to 6 of the number keys displayed at the bottom of the diagram used in the read mode and program check (CHECK) (change) mode, and also used to specify the mode. MARK key, which has an indication on the key itself used when
Also used as EAD key, 5AVIIJ -, LOAD key, CUT key (however, P, IN key 201
), the number of keys required as a whole can be significantly reduced, contributing to cost reduction and improvement of the panel space factor,
In order to ensure these three types of dual use, that is, to ensure proper use, a light emitting diode (LEDI) is used to associate and display the key mode indicating which side of the key is being operated in the upper and lower parts of the diagram. ,I,ED
The key point is that a KEY MODE indicator consisting of 2 etc. is provided.

Regarding key operations for mode specification, these keys themselves have a display, and since they are operated at the beginning of each mode, it is necessary to intentionally display the operation status of these keys. The display is not attached to the relevant part, and a MODE display 3θ1 is separately provided in the display section SOO so that each mode can be displayed and a display according to the progress state in each mode can be made.In this case, One of the features is that the same display can display each mode and the progress status of each mode.

In other words, the MOD'FJ display 301 is composed of two-digit displays each made of a seven-segment light emitting diode, and the number 1 is associated with the one-digit display according to the operation of the mode designation key. ~6 modes are displayed, and the other 1 digit is an alphabet (a) + (b) that corresponds to the progress status of each mode from 1 to 6 above.
, (c) + (d) + (e) , (f) , (
h) , (1) + (j) + (1) , (p)
, 0 , (o) (However, the actual display format is as described above) By changing the display format of each mode and the progress status of each mode, Although it is possible to display on the same display, if this configuration was not adopted, it would be necessary to provide a number of displays corresponding to the number of modes and the number of progress states for each mode. In comparison, the number of required displays can be significantly reduced, contributing to cost reduction and improvement of the 79-channel space factor.

As for the 200 copies of the operation key, 5TART Gear 2 is still available.
0 B, 5 A step (STEP) key and an enter (EN) key that are also used in correspondence with the TOP key 209, respectively.
TER) key can be used in two modes, read mode and program check (change) mode, with equal constraints. This allows the TNO and Q signal mo of the first song to be set in read mode.
The function of inputting (including correction) data in de-2 and the function of reading and checking or changing the program information written in advance in the program check (change) mode cannot reasonably be performed using the same key. Compared to providing these keys separately for the read mode and program check (change) mode, the number of keys required is reduced, reducing costs and improving the panel space factor. This is something that can contribute to the development of society.

As for the display section 300, each 7-segment light emitting diode has a display on the two-stage section.
Digit TNO display 302, index (X) display 3
03, SEC indicator 304°A, MHN indicator 305,
A, SEC display 306 and 1 digit A, 14tAM
The E display 307 has a display in the lower part of the figure.N1~
By being used as the catalog number display for NI3, the overall number of displays required can be significantly reduced, contributing to cost reduction and improvements in panel space. Can be mentioned.

In this case, the MODE display 301 cannot be used to display that the catalog number is being input (displayed) in the read mode, but the remaining displays 301 to 301 for displaying program information. It is important that the catalog number, which requires 13 digits to be displayed, can be displayed in just the right amount using 907.

Next, a description will be given of matters that can contribute to improving the operability and ensuring reliable operation for each operation mode, which were similarly implemented in the specific example.

First, in the marking mode, the M and END keys 206, which are operated at the end of a song, are pressed and the P and OUT keys 206 are pressed within a predetermined time, for example, 10 seconds.
If the key 206 is operated, the operation of the corresponding key 206 is interpreted as an operation of the P, OUT key 205, and the operation of the P, OUT key 205 is ignored.
Since operating 5 is to specify that the program area ends and enters the lead-out area, the P and OUT keys 205 should originally be operated at the end of the last song. It should be. Todoro happens to have the next song, M, END key 2
After a specified time (within 10 seconds) after operating 06
Since the user operated the P and OUT keys 205 again, this meant that the original program area had ended and the M and END keys 2 were to be entered into the lead-out area.
This means that P, OUT'P-205 is considered to have been operated when 06 is operated.

Thereby, there is no need to redo the operation again, and this can contribute to simplifying the operability and ensuring reliable operation.

Also, by processing M, END before M, HEADQ as if it was a predetermined time, for example, 3 seconds ago, p
, M, END key operations before M, HEADO can be omitted, simplifying the operation.

When the M, END keys, M, and HID keys are operated intermittently at a relatively fast cycle, the former will be accepted as the last one if the intermittent interval is less than a predetermined time, for example, 7 seconds;
The latter is achieved by allowing the first one to receive the intermittent operation if the total time of the intermittent operation is less than a predetermined time, for example, 10 seconds.
One point is that it has ensured reliable operation.

Furthermore, by processing the M, lAD of the first song as being 91 fixed time after P, IN, for example, 3 seconds, M, II (FAD key operation) after p, P, IN is processed. The point is that the operation can be simplified by making it possible to omit the .

P and IN are still used as marking signals.

M, HEAI), M, CHANG, INDEX,
It is also important that P, OUT, M, and END are used as different signals by FM modulating ASCII codes coded separately in consideration of ease of subsequent processing, as described above.

Second, since a function for checking saved data is provided as a verify mode in the program save (5AVE) mode, reliability of operation is ensured.

In addition, in the program check (CHECK) (change) mode, each time the 5TEP key 208 is operated, the zologram data can be displayed and checked one state at a time. One point is that certainty is ensured.

Therefore, if there is any data that you wish to change during such a check, you can easily change the program data by pressing the ENTER key 20 key, moving the cursor to the part to be changed, and operating the number keys to be changed. It is also important to note that there is a stagnation in trying to obtain the desired results.

Another advantage is that the syntax error display 2d due to a mark mistake can be displayed in the read (R, EAD) mode, thereby ensuring reliable operation.

Similarly, read error display 2E in read mode, write error display 3E in verify mode, read error display 4E in program load (1, OAD) mode
Since these are configured to appear separately, it is possible to ensure reliability of operation in each mode.

It is also important that when any of these errors, especially the syntax error display 2d, occurs, the error can be easily corrected by entering the program save mode described above. .

Furthermore, in the cutting (C1JT,') mode, the lead-in area arc is first output by operating the 5TART key 208, and then P and IN data is input from the VTR 110 or the START key 20 is output.
The data in the program area is output by operation B.
Finally, when the data in the program area is completed, the data in the lead-out area is outputted, thereby simplifying the operation and ensuring reliability.

In addition, by providing each of the above-mentioned modes, that is, marking mode, read mode, program save mode, program load mode, and cutting mode, it is possible to not only simplify and ensure operation, but also to organically combine each mode. It is also important that a more desirable subcode signal generator with advanced functionality can be implemented.

It should be noted that the present invention is not limited to the embodiments described above and illustrated, but may be modified and applied in various ways without departing from the gist of the invention.

〔Effect of the invention〕

Therefore, as detailed above, according to the present invention, P
It is possible to provide an improved subcode signal generation device that can accurately generate a subcode signal to be encoded into a CM main code signal with a simple operation.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the configuration of one embodiment of the present invention, FIGS. 2 to 8 are diagrams for explaining an example of the subcode used in FIG. 1, and FIGS. FIG. 3 is a diagram for explaining a specific example of the diagram. 110...VTR, 712...PCM processor,
112... Encoder, 113... Subcode signal generator, 114... Control circuit, 115... Keyboard, 116... Display, 117.118... Input/output interface, 114a... Marking signal generation section, 114b... Subcode signal storage section, 114c.
...Time measurement circuit section, 114d...Time chart creation section, 200...Part of operation keys, 300...Display section 2
0/1...P, IN key, 202...M, HEAD
key, 203...M, CHANG key, 204...
INDEX key, 205-P, OUT key, 206-
・・M, END geeky 07 =・VERIFY key, 20 B −・・STA, RT key, 2o 9-8T
OP ghee, 200-212...Numeric key, 202...
→French RK key, 2θ3...REA key, 204-8A
VE *-1205-LOAD key, 206...C
UT, key, 207...CHECK key, 208...
...5TEP key, 209...ENTER key, 30
1...MODE indicator, J? 02...TNO display, 30.9...Index (X) display, 304.
...MIN display, 305...SAC display, 306
...A, MIN display, 307...A, SEC display, 30/n...A, FRAME display, 302
~308... Catalog number display, LEDl +
LEDl...KEY MODE indicator, TJED3
...MUSIC display, LED 4...Lead-in display. Applicant's representative Patent attorney Takeshi Suzue, Hiko Figure 11 Figure 12 Figure 13 Figure 14 Figure 16 Figure 18 (a) (P, IN, HE) Figure 20] \D]

Claims (1)

[Claims] a first means for performing a marking mode for recording a desired marking signal corresponding to the main code signal at a predetermined position on an audio track of a videotape on which a PCM main code signal is recorded in advance on the video track; a second means for performing a read mode for reproducing the videotape on which the marking signal has been recorded by the first means and measuring the generation time of the reproduced marking signal; a third means for performing a program save mode for recording at the beginning of an audio track of a videotape; and a third means for reproducing the videotape on which the measured time data is recorded, and performing the program saving mode based on the reproduction measured time data. A fourth mode for executing a program load mode in which a subcode signal corresponding to the main code signal is generated and stored.
a fifth means for performing a cutting mode for transmitting the subcode signal generated and stored by the fourth means; and a program check for checking the subcode signal data generated and stored by the fourth means. and sixth means for performing the marking mode, and configured to be able to generate a specific coded marking signal to be marked when incrementing an index in at least one unit of the main code signal during the marking mode. A subcode signal generator characterized by the following.