JPS5972628A - Sub-code signal generator - Google Patents

Abstract

PURPOSE:To ensure the operation of sub-code generation, by receiving a marking signal incoming fastest only when the marking signal of a main code start section is inputted intermittently less than prescribed time, in the marking mode preceding each succeeding mode for the formation of the sub-code. CONSTITUTION:The sub-code generator is operated in response to marking mode, read mode, program save mode, program load mode and the like designated by a keyboard and the required sub-code is formed easily, surely and automatically. At the cutting mode, the main code is encoded by the sub-code and becomes a master disc recording signal. Further, the program check mode for the change of content is attained. When plural music head marking signals M. HEAD are inputted intermittently in the interval <=10sec at the main code start point being one unit of the VTR tape, the input incoming fastest only is accepted, allowing to ensure the operation of sub-code generation.

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 subcode signal generation method thereof. 0 Regarding improvement of equipment [Technical background of the invention and its problems] Recently, in the field of audio equipment, PCM (pulse code modulation) has been used in order to achieve as high fidelity recording and playback as possible.
Digital recording and reproducing methods using technology are being adopted.

In other words, this is called digital audio, and the audio characteristics are independent of the characteristics of the recording medium and are far superior to those using conventional analog recording and playback methods. This is because it has been established in principle.

In this case, a system that uses a disk as a recording medium is called a DAD system, and optical, electrostatic, and mechanical recording and reproducing methods have been proposed, but none of them are available. Even when adopting the t method, the disc record master recording device that embodies it is required to be able to satisfy various advanced functions and performances not found in conventional systems. .

In other words, if we take the CD system as an example, this type of DAD
Similar to normal disc record master recording devices, this disc record master recording device produces master discs for mass production of disc records that are used at the end, and in this case, instead of using conventional cutting methods, This is done optically using laser light, but at that time,
It is necessary to encode in advance sub-code signals used for various displays and controls on a music signal that is a PCM-processed main code signal.

Here, there are eight types of subcode signals, P and QW, but currently two types, P signal and Q signal, are used.

Among these, the P word is ゛0'' during the song and 1 between songs.
'', and there is no interval between songs, so even if the song changes, it will continue for a certain period of time.
1#, and in the lead act area after the final song, II IIF, u O'' are repeated alternately.

In addition, (No. 118 is the number (TNO 2) rack number of the song at the time it is being played (played)) An index indicating the subdivision within the two songs (X) The elapsed time within one song and the number from the beginning of the first song It is used to display absolute time.

In addition, this Q signal is a table op content (TOC) that includes the absolute time, maximum and minimum number of songs, etc. for each recorded song in the lead-in area before the first song.
It is used as a record for the above-mentioned P (No. 3), and is intended to facilitate random selection of recorded songs.

To record onto a master disc, generally speaking, 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 VTR tape, and then the playback signal from this VTR tape is replayed. A predetermined digital signal (main code signal) is derived through a PCM processor, and converted into a signal format such as the CO system using an encoder, which is used to control the laser output of the master recorder.

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 recording a VTR tape containing a music source, the starting time of the song was measured in advance using a clock and inputted into a subcode generator before recording the master, and the subcode generator was used to generate the subcode again when recording. By driving a code generator, a subcode signal is generated and encoded into a main code signal from a VTR tape.

However, in such a subcode signal encoding system, the premise is that you listen to music on a VTR tape and measure the start time of a song, i = +, so in reality, the subcode signal to be encoded This has serious disadvantages in that the beginning time of a song tends to be inaccurate and the operations thereof are very complicated.

[Purpose of the invention]

Therefore, the present invention has been made in view of the above points, and provides an improved subcode signal that can accurately and easily generate a subcode signal to be encoded into a main code signal that has been converted into PCM in advance. The purpose is to provide a 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 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.
means, fifth means for performing a cutting mode for transmitting the subcode signal generated and stored by the fourth means, and a program boot for checking all subcode signal data generated and stored by the fourth means. and a sixth means for performing the code mode, and when in the marking mode, a state in which a plurality of marking signals marked at the beginning of one unit of main code signal are input intermittently within a predetermined time is the first. It is characterized by being configured so that only the marking signal can be attached.

[Embodiments of the invention]

Hereinafter, referring to the drawings, a case in which the present invention is applied to a CD system will be explained in detail as an embodiment of the present invention. In other words, in FIG. 1, 110 is a commercial VTR-
C- Yes, C0) VT-'RI I O is loaded in advance with a video tape on which the video track has been recorded in PCM format with a music signal to be the main code signal for recording in a predetermined format. shall be taken as a thing.

The video output terminal T of the VTRll0 is PCM
It is coupled to the main code signal input terminal T2 of the encoder 112 via the block switch 111.

Reference numeral 113 denotes a subcode signal generator, which includes a control circuit 114 made of, for example, a microcomputer, a keyboard t115 that supplies various control signals to the control circuit 114, and a subcode signal generator that outputs all the various output signals from the control circuit 114. A display 116 for display, the control circuit 114, and an audio trunk recording input terminal T3 of the VTRll0.
and two input/output interfaces 117 interposed for coupling with the audio track playback output terminal T4.
, 118.

Here, the control circuit 114 includes a marking signal generation section 114a that generates a marking signal, which will be described later, in response to commands from the keyboard 115, a subcode signal storage section 114b that stores various data generated as subcode signals, and a subcode signal storage section 114b that stores various data generated as subcode signals. A time measurement circuit unit 114c performs time measurement based on the audio trunk playback output from the VTRIIθ, and a time chart creation unit 114d that creates a predetermined time chart to be described later based on the output from this time measurement circuit unit. The time chart creation section 114d'C is configured to be able to generate all subcode signals such as the TOC signal, P, and Q signals, based on the time chart created by the time chart creation section 114d'C.

A length code signal output terminal T5 of the subcode generator 113 including such a control circuit 114 and the like 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 (for example, EFM: Eight-Fourteen Modulation) in accordance with the 7-bit format of the CD system, and the encoder 112 is configured to perform necessary encoding processing (for example, EFM: Eight-Fourteen Modulation) in accordance with the seven formats of the CD system. It is assumed that the output 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 these markings are basically placed at the beginning and end of a song, they may also be placed at breaks in the song when the index X signal is taken into account.

In addition, markings to indicate the starting and ending points of a disc record are also required.Although these markings may be a single signal, for example a sine wave signal with a constant frequency, they are For this reason, it is preferable to use different signals for each case0 Therefore, as the marking signal actually used, it is best to use the ASCII code defined as follows, for example, by FM modulating it.○ ■ Disc Playing start point...A■ Disc playing end point...B■ Start of song...
・・・・・・C■ End of song ・・・・・・・・・
Note that these marking signals are transmitted from the keyboard 1 attached to the subcode generator 113 for convenient operability.
The marking signal is generated by the marking signal generating section 114a in the control circuit 114 in response to the key operation of 15.0 The marking operation is performed while the VTR 110f is in the playback state, but in this case, the audio of the video tape is It is assumed that the track is in a recording state (dubbing).

That is, while playing the VTRll0 and listening to the music signal recorded in PCM format on the video track of the videotape through the processor 111 to the PC and on the monitor 119, operate the keyboard 115 to input the necessary marking signal to the audio track of the videotape. The marking operation is performed by recording the information.

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 114a in the control circuit 114 in response to key operations on the keyboard 115, is sent 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 VTRzzc+i is put into the playback state again and time measurement is performed.In this case, of course, the audio track of the video tape is put into the playback state.

In other words, the audio track playback output (marking signal) from the VTR 110 is sent to the input/output interface 118.
The data is read to a time measurement circuit section 114C in the control circuit 114 via the control circuit 114, and measures the time between each marking point from the disc play start point.

Next, when the above-described time measurement operation is completed, the time chart creation section 114d in the control circuit 114 starts to create a time chart according to each marking.In other words, the time chart created here Based on the chart, a TOC signal that becomes a subcode signal is generated, and initial data for generating a P signal or a Q signal is also set and stored in the storage section in the control circuit 114. be.

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

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

That is, to put the VTR 1iO into the reproduction state again, the subcode generator 113 first repeatedly generates the TOC signal. When the marking signal for starting a performance recorded in advance in the audio trunk of the VTR 110 is input to the subcode generator 113, the subcode generator 113 is stored in the storage section 114b of the control circuit 114 in advance. A P signal and a Q signal are generated as subcode signals (this also applies to the generation of the TOC signal).

That is, the video output from the VTR 110 is input to the encoder 112 as a predetermined digital signal, that is, the main code signal, via the PCM processor 9-111f, and at the same time, the necessary subcode signal is input to the subcode generator. 113 and input to the encoder 112, the subcode signal is encoded into the main code signal.

Then, the encoder 712 performs necessary encoding processing such as EFM and transmits the master recording.By the way, as described above, the subcode signal is generated accurately and with simple operation, and is encoded into the main code signal. Although this method is effective in its own way because it enables master disc recording, it is inconvenient because it is necessary to perform the above-mentioned operations each time master disc recording is performed.

That is, unless the above-mentioned operations except the first marking operation are repeated each time on one roll of videotape, subsequent master recordings cannot be made. Therefore, in order to completely eliminate such inconvenience, it is necessary to improve the time chart obtained in the time chart creation operation, which is the substantial final operation of generating the subcode signal in each operation for the first master recording described above. - Preliminary data is recorded in advance at the beginning of the audio track of the videotape, that is, the part before the first marking signal is recorded (this is necessarily the part before the recording part of the PCM music signal recorded on the video track). What is necessary is to perform a time chart data recording operation such as to record the time chart data in

In this way, if you record the Thai-French chart data in advance at the beginning of the audio track for one videotape, no matter how many times you record the master disc, you will not have to perform the above operations again. This is very convenient because all subcode signals necessary for master recording can be generated immediately after reading the time chart data.

In addition, in the marking operation described above, it is difficult to accurately place the marking at the desired position, and therefore, the marking may sometimes be placed at the wrong position. Further, even if it is possible to accurately mark a desired position, there may be cases where for some reason it is better to change the position (especially the beginning and end positions of the song).

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

Next, we will explain the marking correction operation that meets such a request. First, the correction is made by reading out the time boolean data recorded at the beginning of the audio track on the video tape and displaying it on the display 116. Bye.

In this case, the time chart data is displayed as the open side time of each marking point, so it is best to change the marking time and marking type to the desired ones by operating the keyboard 115. This allows all subcode signals to be generated.

Next, a specific example of the subcode generator 113 described above will be explained, but before that, an actual example of the subcodes (particularly P and Q) of the CD system 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 Sz sub-code synchronization patterns.

■ Channel P Channel P is a flag bit indicating the start of a musical tone piece according to the code rule below.

Musical note P=0 Start flag P=1 The minimum length of the encoded start flag in channel P is 2 seconds, and the end of the encoded start flag gives the start of the next musical piece.

If the actual nail length is greater than 2 seconds, the start flag length will give the actual nail length.

(2)-1 Lead Intrac Channel P in the lead intratrack is encoded as music. The first piece of music is led by a 2-3 second start flag.

-2 Lead Out Track The lead out track is led by a 2-3 second start flag (during the last musical piece on the disc). The end of the starting flag marks the beginning of the lead-out track.

Channel P stays at zero for 2 to 3 seconds after the start of the lead-out track, and the next P switches between 0 and 1 at a rhythm of 2Hz J = 2% (duty ratio 5o ± 10%) ○Channel P has a subcode synchronization pattern 80 ．． Can only be changed after Sl. Encoding of Changol P is delayed by one sub-code block with respect to encoding of channel Q.

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

■-J Sent MSB first with 47 FF lug bits for control 2 channel number and pre-emphasis/.

0α00... Indicates 2 audio channels without BRI emphasis. 0 1000... Indicates 4 audio channels without BRI emphasis.

X0OI... 215 or 4 audio channels with 507 μs of emphasis. The emphasis bit (control) bit 4) can only be changed during an actual period of at least 2 seconds. -2 Address: MSB with 4 control bits for data Q.
Sent from

2-3 Data Q Near 2-bit data, MSB always sent out first 0.2-4 CRC 2 Control, address and data A set of 16-bit CRC on Q, sent out MSB first. Parity bits are inverted on disk. The remainder is checked to see if it is zero 0 Polynomial % Expression % ■ The following three modes are defined for data Q.

■-1 mode 1: ADR=1=(0001) mode 1
occupies at least 9 of the 10 consecutive sub-code blocks.

In modede, there are two different dates. type is possible. lead indra The data format between links is shown in Figure 4. Music and replays on the standard 0 disk. Data type between track out track is as shown in FIG.

TNO: Music number is expressed in two-digit BCD 〇〇〇: Lead-in track The ending part of the lead-in track is the starting diameter of the program area.

01-99: Music number A music piece is a nail with the same music number. Led by Li. Music number starts from a value of 01 and increases by 1. How many 01 programs are there to add? stored on that disk numbering is done in consecutive numbers. RuO Eight people: lead act track The lead-out track is a nail mark The last of the disc without leading the issue. O starts at the end of the music piece X: List of contents of the saving number in full 2-digit BCD Show○ Lead intratrack period table of contents is not valid.

00 2-bit encoding Nail in channel Q The encoding is “now in music” Give the nail length as shown.

The first piece of musical note is 2-3 seconds (see channel P) 0 preceded by the last sign The lead-out track is a musical note It is encoded as .

O1~99; Subdivision number Lead-out track duration X is 01° musical piece (TNO=01~99.X100) Inside, the first value of X is 01. Become. The value of X increases by 1. It is only possible to do so.

ZEZO: These 8 bits are zero OMIN, S
EC, FRAME: The running time in a musical piece is expressed in 6-digit BCD. That is, MIN, SEC, and FRAME are 2 digits each. When the music starts, the time is set to zero. 0 time indicates the duration of the music increases. , the value becomes zero at the end of the cut and ends. The lead-in and lead-out track opening times are increased. Minutes are stored in MIN and seconds are stored in SEC. 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, ASEC and AFRAME each have two digits. At the start diameter position of the program area, the running hour is set to zero and the TNO contains the value of the first music on the disc. The minutes are stored in AMIN and the seconds are stored in ASEC. 1 second is subdivided into 75 frames (running from 00 to 74) O 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 P F RAME are POIN
Give the music number starting point indicated by T. These values determine the starting position of the music at the feeding time (AMIN, A) with an accuracy of 1 second.
SEC and AFRAME). The starting position of the music is the first position of the new music number, which is XK00. If POl, NT=AO, PMI
The value of N gives the first TNO on the disk, and PSEC, PFRA, and ME are zero. If POINT=A,I, the value of PMIN gives the last TNO on disk and PSEC and PFRAME are zero. If POXNT
=A2, then PMIN, PSEC and PFRAME give the start position of the lead-out track. Table 1 gives an example of encoding when six songs are included on one disc.

■-2 mode 2: ADR=2 = (0010)
If mode 2° is presented, it occupies at least one of the 10t 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. Uses UP0/EAN code (BAR encoding). The catalog number (number) is not changed to UPC on the disk. / If there is no catalog number encoded based on the code, N1 to N13 are all zero or 0 which can remove mode 2 from the disc. ZERO: These 12 pits are zero. AFRAME: Continuation of AFRAME in mode 1 (from 00 2 digit BCD (running up to 74). Duration of lead-in area (TNO=00). These 8 bits occupy at least one of the 100 consecutive blocks if mode 3 is presented. Mode 3 is used to give unique numbers to musical pieces. This is done using l5RC (International Standard Record Code).

15RC 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 engineering 1~ 112. By country The code is given by Engineering 1 to Engineering 2, Engineering 3 to Engineering 5 give the owner code, I6-I7 are based on the record year. Numbers 8 to 112 are the serial numbers of the record. It is. The letters ll-l5 are shown in the table. encoded in a 6-bit format according to ing. The digits from I6 to 112 are 4 bits. This is the number of BCDs.

00: These 2 bits are zero ZERO: These 4 bits are zero AFRAME: Continuation of AF RAλ-E in mode 1 (2-digit BCD of running from 00 to 74). During the lead-in area (TNO=00), these 8 bits are zero.

■ Channel: / Channel R, S, T, U, V
, 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 of the subcode generator 113, which has an operation key part 200 corresponding to the keyboard 115 described above and a display part 3Qσ corresponding to the display 116.

In this case, the operation keys 200 are P and IN keys 201, which are displayed in the upper part of the diagram and are used in the marking mode.
, M, HEAD key 202 .

M, CHANG-203, INDE
X key 204.

P, OUT key,? o5. In addition to the M and END keys 206, the VERIF'Y key 207 and the 5TART key 2
08゜5 TOP key 209 and numeric keys 210, 211, 212 (but 0
- 6 are the above 201 - 207), then the above 1 - 6 numbers 202 - 207 are also used (7, ,) MARK key for mode designation, which has a display on the key itself, R
EAD key, 5AVE key.

The LOAD key, CUT key, CHECK key, and the 5TEP key and ENTER key are displayed in the lower part of the illustration where the above 208 and 209 are also used. A light emitting diode LED is installed as a KYE MODE indicator in the lower part.
, LED, are attached.

The display section SOO has a 2-digit MOD display in the upper part of the figure, each consisting of a 7-segment light emitting diode.
E indicator 3θ7, TNO indicator 302. Index X display 303, MIN display 304. SEC display 305, A, MININ display 06. A.SEC
Display 307 and 1 digit A, FRAME display 30B
Each of the above-mentioned indicators 302 to 3 has a display in the lower part of the figure.
08 is also used as N1 to N13 (catalog number)
It has a CATALOG NUMBER display.

Note that there is a MUS between the operation section 200 and the display section 300.
Light emitting diodes (LEDs) are attached as IC and LEAD-IN indicators.

First, the usage mode 2 display mode of each of the operation keys and the display will be explained.

(P, IN key 201) 0, which is the key operated at the beginning of the program area (M, HEAD key 202) Q, which is the key operated at the beginning of a song [: M, CHANG, key 2o3] Without a song interval ,
This is the key operated when changing songs.

[INDEX key 2o4] This is a key operated when incrementing index X.

[P, OUT key 205] This key is operated when entering the read act area at the end of the program area.

(M, END key 206) This is the key operated at the end of the song.

(VERIFY key 207) This key is operated in 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. be.

(START key 208) This key is operated to start each of the read mode, program save mode, program load mode, and cutting mode.

(STOP key 209) This key is operated to stop processing and wait for mode designation in read mode, program save mode, program load mode: PA, and cutting mode.

[0-9 numeric keys 201-207, 210-. ? 1
．． 2) TNO and Q signal modes for the 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.

(5TEP 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.

TNO and Q signal mo of the first song in CENTER G209 keyed mode
This key is operated to move the cursor (decimal point) to the right by one character when inputting data of de-2 and in program change mode.

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

(MODE display 3oI) Displays each operation mode with numbers and alphabets, and there are 13 types of alphabets (
a) p (b) p (c) , (a) , (e
) , (f) + (h).

(1)' , (j) , (A , (p) , (
u), (o)″fr: Displayed in the format shown in FIG.

('TNO,X,MIN,SEC,A,MIN,A,S
E.C.

A, FRAME display 302 to 308] Track number 1' NO
, index X.

Minutes and 2 seconds of the song time MIN, SEC, absolute minutes and 5 seconds from the beginning of the first song A, MIN, A, SEC, and the same absolute frame A and FRAME k are displayed in numbers.

(CATLOG NUMBER display 302-308)
This is displayed when inputting the mode-2 catalog number of the Ql word in the read mode.

[MυSIC display LED 3] Lights up when in the program area during cutting mode.

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

(KEY-MODE indicator LED, , LED2) Lights up corresponding to 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 corner)]

This mode marks the beginning of a song on the audio track of a videotape.

[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 (5AVE) 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]

A mode in which a subcode (EFM) signal is generated, that is, as described above, a subcode signal to be encoded into the main code signal is generated, and then the encoder performs the necessary encoding processing to derive the master recording signal. Mode 〇 [Program check (CHECK) (change) mode] This mode is for checking and changing the time of the beginning of a song, etc., which is necessary when generating a subcode (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 device enters a 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). In other words, it becomes a standby state.

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 MODE display 301 and the mode designation is as follows.

1...Marking (MARK.) mode 2...Read (READ) mode 3...Program save (5AVE) mode 4...
Program load (LOAD) mode 5...Cutting (CUT,) mode 6...Program check (
(CHECK) mode, and the first specified is marking (MARK,
) %-code, followed by P, IN, M, HEAD, M, CHANGE, which should be operated in marking mode.

INDEX, P, OUT, M, END operation keys 20
The marking operation is performed by operating the numbers 1 to 2.06 according to a related check program 2 as shown in FIG. 12, for example.

Furthermore, the M and END keys 206 operated at the end of the song are
If the P and OUT keys 205 are operated within 10 seconds after the key 206 is pressed, the operation of the keys 2o6 will be changed to P and OUT.
It is assumed that the operation is interpreted as the operation of the T key 205 and the operation of the P and OUT keys 205 is ignored. however,
This is between the M, END key and P, OUT key operations.
, is removed when the HEAD key or the CHANGE key is operated.

Also, the operations of the M and END keys before M and HEAD can be omitted, but in this case, M and END are
, HEAI). ○Here, press M, END key, M
, ) (If the EAD key is pressed intermittently at relatively fast cycles, as shown in Figures 13(a) and 13(b), if the intermittent time is less than 7 seconds, the last one will be accepted; For the latter, if the total time of the intermittent operation is less than 10 seconds, the earliest one is accepted.

If you wish to end (including cancel) the marking operation, you can operate the 5TOP key 209''f: 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.

Next, as shown in Fig. 14, the READ mode is specified, which reads the marking signal marked on the videotape in the marking mode and extracts lead-in information (TOC data) and program information. It is used to perform actions that create .

Therefore, it is of course 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, if you want to enter Pa 16" as the TNO, first press the numeric key II 111, then press the ENTER key, and finally press the numeric key It 6 PI. During this time, the display on the TNO display 302 The form is the 15th
The result is as shown in Figures (a) l (b) t (c).

If you enter the wrong number, press ENTER key 209
' to return the cursor (decimal point) to the upper digit, then press the correct number key. Then, once the TNO data input is complete, you can input the catalog number by operating the 5TEP key 20g. In this case, enter a 13-digit catalog number using the same procedure as above for entering the TNO.

Once you have finished inputting the catalog number in this way, operate the 5TEP key again.
By operating all the P keys 208), the mode is set in which the previously marked marking data can be read.

This mode is shown in FIG.
After setting TR1lOfbunny state, press 5TART key 2
All you have to do is operate 08.

Then, when the reading is completed, operate the 5TOP key 2θ9 (if you wish to cancel, do the same)0.If the reading error display 2E is displayed during this time, all you have to do is rewind the entire VTRll0 and redo the motsu-change operation.

Also, if the syntax error display 2d due to a mark mistake disappears, operate the 5TOP key 209 to enter the mode standby state, and then correct it in the program change mode described later, or go back to marking mode and mark again. Just try again.

Next, save the program (5) as shown in Figure 17.
AVE) mode, but in this case, the videotape is rewound to a point about 2 minutes earlier than the marked section.

Then, as the VTR 11θ full post-recording state, 5TART
Press key 2OS< to enter the write 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 (VERIFY).
I'll do it as a mode.

As a result, reading is performed, and when the loading completion display 3F appears, the VTR 110 is stopped and the 5TOP key 209 is operated.

In this case, if the reading error display 3E is displayed, the operation can be 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 set in advance at the portion before the above writing, and then the "/TRl I Q" is put into the play state, and the "S" and "T" keys 20B and 20B are operated.

As a result, when the program is loaded and the load completion display is displayed, VTRll0 is stopped and 5T
Operate the OP key 209.0 Note that if the reading error display 4E is displayed during this time, all you have to do is repeat the -change operation.

Next, a case will be described in which the program check (CH'ECK) (change) mode for data check as shown in FIG. 19 is set.

This is done by operating the 5TEP key 208 without 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, 'I' EP key 2
Each time 08 is pressed, one state (one instruction) is displayed, and the program data is changed as necessary.

FIGS. 20(a) to 20(h) show display examples of each data that can be displayed by operating the 5TEP key 208 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 kernor (decimal point) to the part to be changed and press the number key to be changed (the figure shows M and HEA).
An example of changing A, 5FCI 4 seconds to 11 seconds is shown in the case where the time of D is delayed by 3 seconds) 0 Next, cutting as shown in Fig. 22 (CUT, )
In this case, after setting the video tape to the predetermined state in which it should be cut,
Hold TR110 in the pause state and cut
key 206゜5 Operate TART key 208, then VT
All you have to do is release the pause state of RI JO, start cutting, and operate the 5TOP key 209 when the program completion display for cutting is displayed.

In this case, first the data in the lead-in area is output by operating the 5TAR'I' key 208, and then the data in the VTR1
P, IN data is entered from 10 or S T A R
The data in the program area is output by operating the T key 20B, and finally, when the data in the program area is finished, the data in the lead-out area is output.During this time, the MUSIC Indicator LED, . . . LEAD-IN The display state of the indicator LED 4 is as shown in FIG. 22.

In FIG. 20, (f) is a display that appears when the interval between 2 seconds before M, CHANG and between M, END and M,)IEAD 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 the mark made at that time is a syntax error. Therefore, 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 200 operation keys, some of the operation keys are P, IN key 202, M key 202, which has a display in the upper part of the figure, which is used in the marking (MARK) mode.
, HEAD key 2o2゜M, CH, ANG key 203, INDEX key 2o4゜P, OUT key 20
5, M, END key 206 and VERIFY key 2 used when saving the program (5AVE)
07 is read mode and program check (CH
ECK) (Change) Among the numeric keys with a display on the lower part of the diagram used in the figure, it is also used correspondingly to the numeric keys O to 6, and the key itself used when specifying the mode has a display. MAEK key, READ key 5AV
Can also be used as E key, LOAD key, CUT-+- (However,
P. (IN key 201 is excluded), the number of keys required as a whole can be significantly reduced, contributing to cost reduction and improvement of the space factor of this panel. In other words,
In order to ensure proper use, light emitting diodes (LEDs, LED2, etc.) are used to associate and display the key mode on which side the key is being operated on the upper and lower parts of the diagram. The key point is that a KEY MODE indicator is provided.As for key operations for mode specification, these keys themselves have indications and are operated at the beginning of each mode. Rather than attaching a display to the rock part to indicate the operating status of these keys, a separate MODE display 30'J is installed on the display section 300.
F is provided so that the display of each mode and the display according to the progress state in each mode can be done, but in this case, the display of each mode and the display according to the progress state of each mode are all on the same display. -One of the distinctive features is that it is made to be possible.

In other words, the MODE display 301 is composed of two-digit displays each consisting of a seven-segment light emitting diode.
There is no mode display sound for numbers 1 to 6, which correspond to the operation of the mode designation key on the one-digit display, and the other one digit indicates the progress status of each mode of 1 to 6 above. Corresponding alphabets (a), (b),
(c), (d).

(e) , (f) r (h) , ni) , (j
), CQ r (p), (u), (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, it is possible to display them on the same display. However, if this type of configuration is not adopted, the number of display devices required will be reduced depending on the number of modes and the number of progress states for each mode. This is because it can be significantly reduced, contributing to cost reduction and improvement of the panel space factor.

In addition, for the 200 copies of the operation keys, 5TART key 2
08. Step (5TEP) key and ENTER that are also used in correspondence with the 5TOP key 209
The main feature is that the keys are configured to be able to be used isometrically in two modes: read mode and program check (change) mode. This allows mode-2 of the TNO and Q signals of the first song to be set in read mode.
The function of inputting data (including correction) and the function of reading and checking or changing program information written in advance in the program check (change) mode can be reasonably performed using the same key. ,
Compared to providing these keys separately for read mode and program check (change) mode, the number of keys required can be reduced, contributing to cost reduction and improvement of panel space factor. .

As for the display section 300, each of the display sections 300 is composed of 7-segment light emitting diodes and has a display in the upper part of the figure.
Digit TNO display 3o2. Index (3) indicator s
o3. SEC display 3o4゜A, MIN display 305
, A, SEC indicator 306 and single digit A, FRA, M
E The display 307 is N1 with a display in the lower part of the figure.
By being used as a catalog number display for ~N+3, the number of displays required as a whole can be significantly reduced, contributing to cost reduction and improvement of the panel space factor.

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 each of the remaining displays 301 to 307 for displaying program information has 13 digits. It is important to be able to display just the right amount of catalog number that needs to be displayed.

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, when marking is in progress, the M and END keys 206, which are operated at the end of the song, will be pressed if the P and OUT keys 5 are operated within a predetermined period of time, for example 10 seconds, after the key 206 is pressed. Press key 206 to P, OUT key 2
Interpret it as the operation of 05 and P. The point is that the operation of the OUT key 205 is ignored.

In other words, P. The purpose of operating the OUT key 205 is to specify that the program area ends and the lead-out area is entered. should be operated on the part of However, since I accidentally operated the M and END geeky keys 6 assuming that the next song was available, I operated the P and OUT keys 205 again after a predetermined period of time (within 10 seconds), which meant that the original program area had ended. M, which is the point at which the lead-out area should be entered, and CP and OU when the END key 206 is operated.
This means that it is assumed that the T key 205 has been operated.

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

Also, M. By processing M and END before HE A D as if they were a predetermined time, for example, 3 seconds ago, 1. The main point is that the operation of the M and END keys before M and J-IEAD can be omitted, thereby simplifying the operation.

If the M, END key, M, HEAD key is operated intermittently at a relatively fast cycle, the former will accept the last one if the reading interval is less than a predetermined time, for example, 7 seconds, and the latter will accept the intermittent operation. If the total time is less than a predetermined time, for example, 10 seconds, the first one can be accepted, thereby ensuring reliable operation.

By processing it as if it were to occur after a predetermined period of time, for example, 3 seconds, it is possible to omit the M/HE AD key operation after P-IN, thereby simplifying the operation.

In addition, P, IN, ! which was neglected to be adopted as a marking signal.
V,i,HEAD,M,CHA,NG,INDEXP,
As mentioned above, considering the ease of later processing, OUT, M, and END are each individually coded as a different signal, and the coded ASCII code is FM modulated and used as M. It is essential.

Next, when in program save (5AVE) mode, it is equipped with a function to check the saved data as Verinoy (Vbl<IFy) mode.
One point is that the reliability of operation is ensured.

In addition, in the program check (CIIECK) (change) mode, each time the 5TEP key 2θ8 is operated, the programmed data can be displayed and checked one state at a time, ensuring reliable operation. One point is that the gender is guaranteed.

If there is any data that you wish to change during this check, you can easily change the program data by moving the cursor to the part to be changed using the ENTER key 209 and operating the number keys to be changed. :c is also important.

Another advantage is that the reliability of operation is ensured by displaying syntax errors 2d due to mark mistakes in the READ mode.

Similarly, reading error display in read mode; L E ,
The writing error Pi3E in helicopter 7 eye mode and the reading error 2-display 4E in program 2 load (LOAD) mode are displayed separately, thereby ensuring reliability of operation in each mode. One point is that this is ensured.

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

Furthermore, in the cutting (CUT.) mode,
First, data in the lead-in area is output by operating the 5TART key 20B, and then P and I are output from the VTRll0.
'N data is entered, but the program area data is output by operating the 5TART key 208, and finally, when the program area data is finished, the lead-out area data is output.
The advantages include the ease of operation and reliability.

In addition, by providing each of the above-mentioned modes, that is, marking mode, read mode, hologram save mode, program load mode, and cutting mode, it not only simplifies and ensures operation, but also allows the organic operation of each mode. It is also important to note that the combination allows a more desirable program code signal generator with advanced functionality to be realized.

It goes without saying that the present invention is not limited to the embodiments described above and illustrated, and that various modifications and applications can be made 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 simple operation.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing one embodiment of the present invention, FIGS. 2 to 8 are diagrams for explaining examples of subcodes used in FIG. 1, and FIGS. 0110...VTR, III...PCM processor,
112... Encoder, 113... Subcode signal generator, 114... Control circuit, 115... Keyboard, 116... Display device, 117, 118... Input/output interface 7 eighth, 114a. ...Marking signal generation section, 114b...Subcode signal storage section, ll4C.
...Time measurement circuit section, 114 (1...Time chart creation section, 200...Part of operation keys, 300...Display section, 20Z...P, IN key, 202...M, HEA
D key, 20.3...M, CHANG Uki-12
04...INDEX key, 205...P, OUT,
Key, 206...M, END key, 207-VERI
FY Ghee, 20 keys...5TART key, 209...
5TOP key, 200-212...Numeric key, 202
...MARK key, 203-REA key, 204-8
AVE key, 205...LOAD key, 206...
CUT, key, 207...CI (ECK key, 20B
...5TEP key, 209 ・ENTER key, 3
01-"MODE indicator, 302... TNO indicator, 303... Index (X) indicator, 304...
...MIN display, 305...SEC display, 306
...A; MIN display, 307...A, SEC display, 308...A, FRAME display, 302-30
8... Catalog number display, LED, LED,
,...KEY MODE indicator, LED3...MU
SIC display, LED,...lead-in display. Applicant's representative Patent attorney Takehiko Suzue Figure 11 Figure 12 Figure 13 MI: NLI M-hi-NLI M-hi-NLI
MJ'l Hiba LI M, 11 Hiba U 14th
Figure r) □・ - then Wano Figure 16 Figure 18 Figure 19 (b) (M, HEAD)
(e) Fig. 20 Fig. 20 (9) (P, 0UT) (h) (Error display) Fig. 21 (a) (b) (C)

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 video tape in which a main code signal converted into PCM in advance is recorded 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 the videotape; and a third means for reproducing the videotape on which measured time data has been recorded by the third means, and based on the reproduction measured time data. a fourth means for performing a program loading mode for generating and storing a sub-code signal corresponding to the main code signal; and a fifth means for performing a cutting mode for transmitting the sub-code signal generated and stored by the fourth means. and sixth means for performing a program check mode for checking the Sarafood signal data generated and stored by the fourth means, and in the marking mode, marking is performed at the beginning of one unit of the main code signal. A subcode signal generator Q characterized in that when a plurality of marking signals are inputted intermittently within a predetermined period of time, only the earliest marking signal can be received and received.