JPS5972620A - Recorder of disc record master - Google Patents

Abstract

PURPOSE:To improve the encoding signal characteristic for master recording by encoding a reproducing main signal with a sub-code formed automatically, based on a marking signal reproduced from a recorded VTR code. CONSTITUTION:The marking signal is recorded on a part corresponding to a PCM main code on a VTR tape in response to the operation of a keyboard 115 of a sub-code generating circuit 113. Further, a sub-code by a time chart forming section 114d forming easily, accurately and automatically the sub-code is stored in a storage section 114b based on the time measuring circuit section 114c and the measuring time measuring the generating time of the reproduced marking signal. A digital signal corresponding to a reproduced main code via a PCM processor 111 by the sub-code is encoded by the encoder 112 and becomes the master recording signal. The characteristic of the encode signal for the master recording is improved by using the sub-code formed easily and accurately and the recording on the master disc such as optical disc is performed in an excellent way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of a disc record master recording device suitable for, for example, a CD (optical compact disc) type DAD (digital audio disc).

[Technical background of the invention and its problems]

Recently, in the field of audio equipment, digital recording and reproducing methods using PCM (Pulse Code Modularity) technology are being adopted in order to achieve high fidelity recording and reproducing as much as possible.

This is called digital audio, and it means that 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 various recording and reproducing methods have been proposed, such as optical, electrostatic, and root plate. Regardless of which method is adopted, the disk record master recording device that embodies it is required to satisfy various advanced functions and performances not found in conventional devices. .

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 an optical method using Rede 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, there are eight types of subcode signals, P, Q...W, but currently two types, P signal and Q signal, are used.

Of these, the P signal is '0' during the song and II between songs.
I It, and there is no interval between songs, so even if the song changes, it remains at 1 pp for a certain period of time, and in the lead-out area after the last song, t 1 ) J, '0'' are repeated alternately. It will be done.

In addition, the Q signal includes the number of the song at the time it is being played (TNO), the index (3) indicating the subdivision within the song, the elapsed time within the song, and the absolute number from the beginning of the first song. It is used to display the time.

In addition, this Q signal is a table of contents (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.
This signal is used to record songs, 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 on a VTR tape, and then the regenerated signal from this VTR tape is regenerated. The PCM processor is used to derive a predetermined digital signal (main code signal), which is then processed by a processor/coder (C).
The signal is converted into a signal format such as the O format and 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 playing a VTR tape containing a music source, the short time from the beginning of the song was measured using a clock and inputted into a subcode generator before recording the master, and the subcode was generated again during recording. By driving the VTR tape, a subcode signal was generated and encoded into the main code signal from the VTR tape.

However, such a subcode signal encoding system is based on the premise of measuring the start time of a song by listening to the music on a VTR tape, so in practice, it is necessary to measure the start time of a song by listening to music on a VTR tape. These methods have serious disadvantages in that their mental time tends to be inaccurate and their operation is very complicated.

[Purpose of the invention]

Therefore, the present invention has been made in view of the above points, and it is possible to accurately and easily generate a subcode signal to be encoded into a main code signal converted into PCM in advance, and thereby The object of the present invention is to provide an extremely good disk record master recording device with an improved encoding system so as to satisfy advanced functions and performance.

[Summary of the invention]

That is, the disk record master recording device according to the present invention includes a video tape recorder loaded with a video tape on which a PCM main code signal is recorded in advance on the video track, and a video tape recorder loaded with a video tape on which a PCM main code signal is recorded in advance on the video track. A sub-code signal that records a desired marking signal corresponding to the main code signal, measures the generation time of the reproduction marking signal from the video tape recorder, and makes the sub-code signal correspond to the main code signal based on the measured time data. A PC that includes a subcode signal generator that generates and stores data necessary for generation, and a PCM processor that performs predetermined digitization processing on the reproduced main code signal from the video tape recorder.
an encoder that encodes a subcode signal generated from the subcode generator on the reproduced main code signal that has been subjected to predetermined digitization processing by the M processor, and performs necessary encoding processing to output a master recording signal; It is characterized by having the following.

[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, 110 is a business VTR.
It is assumed that this VTR 110 is loaded in advance with a video tape in which a music signal, which is a main code signal to be recorded, is recorded in a PCM format in a predetermined format on its video track.

And the video output terminal T11i of the VTR 110:
Encoder 112 via PCM 7° processor 111
is coupled to the main code signal input terminal T2 of the main code signal input terminal T2.

Reference numeral 113 denotes a subcode signal generator, which includes a control circuit 114 consisting of, for example, a microconbeater, a keyboard 115 that supplies various control signals to the control circuit 114, and a keyboard 115 that supplies various control signals to the control circuit 114. A display 116 for displaying an output signal, the control circuit 114, and an audio track recording input terminal T3 of the VTR 110.
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 (described later) in response to a command 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. It has a time measurement circuit section 114c that measures time based on the audio track playback output from the VTR 110, and a time chart creation section 114d that creates a predetermined time chart to be described later based on the output from this time measurement circuit section. , is configured to be able to generate subcode signals such as the TOC signal and P and Q signals described above based on the time chart created by the time chart creation section 114d.

A subcode 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) according to the CD format, and 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 CD format. 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 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 the index (3) 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 ASCII code defined as follows, for example, may be FM-modulated and used.

■ Disc play start point ・・・・・・A■ Disc play end point ・・・・・・B■ Start of song...
・・・・・・・・・・・・・・・・・・・・・・・・
・・C■ End of the song・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・D Marking signal generator 114a in circuit 114
This is something that will occur frequently.

If the marking operation is performed with the VTRZ 10 in the playback state, it will be -, but in this case, it is assumed that the audio track of the video tape is in the recording state (dub-recording).

While playing back the VTR 110 and listening to the music signal recorded as PCM on the video track of the videotape through the PCM processor 111 and on the monitor 119, operate the keyboard 115 to input the necessary marking signals onto the videotape. The marking operation is performed by recording on the audio track.

In this case, each marking signal, which is FM modulated using the above-mentioned ASCII code and is generated from the marking signal generation section 114a in the control circuit 114 in response to key operations on the keyboard 115, is transmitted via the input/output interface 7/8 117. The recorded data will be recorded on the audio track of the videotape of the VTR 110.

When all the marking operations are completed as described above, the VTR 11o is placed in the playback state again and time measurement is performed. In this case, it goes without saying that the audio track of the videotape is in the playback state.

Input/output interface 118 for audio track playback output (marking signal) from VTR 12o
The time measuring circuit section 114c in the control circuit 114 measures the time between each marking point from the starting point of the disc performance.

Next, when the above-described time measurement operation is completed, a time chart creation operation within the control circuit 114 is started.

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

In this case, it is also possible to input external data if necessary.

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

In order to put the VTRll0 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 on the audio track of the VTR 11θ is input to the subcode generator 113, the subcode generator 113 generates a subcode stored in advance in the storage section 114b of the control circuit 114. A P signal and a Q signal are generated as signals (this also applies to the case of generating the TOC signal).

That is, the video output from VTRI 1o is PCM
A predetermined digital signal or main code signal is input to the encoder 112 via the processor 111, and at the same time, a necessary subcode signal is automatically generated from the subcode generator 113 and input to the encoder 112. By inputting the subcode signal, the subcode signal 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, as described above, generating a subcode signal accurately and with simple operations and encoding it into the main code signal makes it possible to record on a CDL disc and is effective for that purpose. This is inconvenient because it is necessary to perform the operations described above every time recording is performed.

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

Therefore, in order to eliminate this 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. In advance, mark the leading edge of the audio track of the videotape before the part where 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 time chart data is recorded in advance at the beginning of the audio track for one videotape, even when the master recording is to be 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 subcode signal and immediately generate the subcode signal necessary for recording the master disc.

In addition, in the above-described marking operation, it is difficult to accurately mark a desired position, so that marking may sometimes be applied to an incorrect position.

Even if it is possible to accurately mark the desired position, there may be cases where it is better to change the position (particularly the beginning and end positions of the song) for some reason.

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, we will explain a marking correction operation that can meet such a request. First, the time chart data recorded at the beginning of the audio track on the videotape is read out and displayed on the display 116 to be corrected. 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. This is the conflict that causes the code signal 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.

(2) Frame Structure The frame structure of the subcode is shown in FIG. One subcoded block contains 98 subcoded sindels.

The repetition frequency of one block is 75 Hz.

The first two sub-code synchronization patterns are SO and Sl sub-code synchronization patterns.

■ Channel P Channel P is a flag pit indicating the start of a musical piece according to the sign rule below.

Musical tone p=.

Start Flag p=i 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 gives 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 remains 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 2 Hz±2 inches (duty ratio 50±10 inches). Channel P is subcode synchronized/? Can only be changed after turn S0,82. 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 for channel Q is shown in Figure 3.

■-1 control: Channel number and Nori emphasis 0
Sent MSB first with 4 flag bits for N10F'F.

0000...Mi... Indicates 2 audio channels without emphasis.

1000...Indicates 4 audio channels without emphasis.

X0OI・・・Brie Emphasis 50/15μ
s 2 or 4 audio channels. The actual emphasis flag (bit 4 of the control block) can only be changed during an actual nail press of at least 2 seconds.

-2 address: MSB with 4 control bits for data Q
Sent from

-3 Data Q Near 2-bit data, MSB always sent first.

-40RC: A set of 16-bit CRCs on control, address, and data Q, sent MSB first. On the disc, the Nonorimity pit is reversed.

The remainder is checked to see if it is zero. Ru.

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. 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 a disc is the same as shown in FIG.

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

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

01-99: Music number A music piece is a piece of music with the same music number. led by. Music number F) is It starts from a value of 01 and increases by 1.

One program can be used on several disks. If the transfer is stored in a bank, the number Fushi is done in consecutive numbers.

AA: Lead-out track Lead-out track has a nail sign the last music on the disc without leading The end of the story begins.

X: Express the table of contents of the music number in 2-digit BCD.

Lead intratrack period table of contents X is not valid.

00: Rigishi encoding Kugishi sign in channel Q It's like saying, ``I'm in music right now.'' Give the nail length. the beginning of a musical piece 1 piece takes 2-3 seconds (see channel P) It is led by the Nokugiri sign.

Lead-out track as musical sound encoded.

01-99: Subdivision number The lead-out track period X is Ol. Musical piece (TNO=01~99° In X(OO), the first value of X is It becomes 01. The value of X increases by 1. It is only possible to do so.

ZEZO: These 8 bits are zero.

MIN+SEC+FRAME: The running time in a musical piece is expressed in 6-digit BCD. That is, MIN.

SEC and FRAME are each 2 digits. When the music starts, the time is set to zero. Time increases during the duration of the music and ends with a value of zero at the end of the music. The lead-in and lead-out track opening times will increase. The minute unit is )/II
N seconds are stored in SEC.

1 second is subdivided into 75 frames (running from 00 to 74) IN, 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 diameter position of the program area, the travel time is set to zero and 'I'N
O contains the value of the first music on the disc. Minutes are AM
IN, seconds are stored in ASEC. 1 second is 75
PO subdivided into frames (running from 00 to 74)
INT, PMIN, PSEC, PFR Pressure: During the lead intratrack, the contents of Table 1 are stored in these locations. The contents of this table are the lead-in area (TN
O=00) is repeated continuously. Within each table, the entries are scrolled three times.

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

PMIN, PSEC and PFRAME are POINT
Give the music number starting point indicated by . These values determine the starting position of the music in absolute time (AMIN,
ASKC and AF Hiroya). The starting position of the music is the first position of the new music volume, which is X(OO.If PO
If INT = AO, then the value of PlviI N gives the first TNO on the disk, and the PSEC and PFR pressures are zero.

If POINT = A I, the value of PMIN gives the last TNO on disk and PSEC and PFRAME
is zero. If POINT = A 2, PMI
N, PSEC and PFRAME give the starting position of the lead-out track.

Table 1 includes 6 songs on 1 disc. An example of encoding is given below.

■-2 Sode 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-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/EAN code, N1-N13 can be all zeros or mode 2 can be deleted from the disc.

ZERO: These 12 bits are zero AFRAME: Continuation of AFR halo in mode 1 (
2 digit BCD of driving from 00 to 74). Duration of lead-in area (TNO=00).

These 8 bits are zero.

■-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 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 15RC code are provided by numbers 1-112. Country codes are given for engineering 1 to ■2, and ■3
~I5 gives the owner code, ■6~F gives the record year, and E8~112 gives the record's serial number.

Characters 1 to 5 are encoded in 6-bit format according to the table below. 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 AFR pressure in mode 1 (0
2 digit BCD of running from 0 to 74). During the lead-in area (TNO=OO), these 8 bits are zero.

■ Channels 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 sub-code generator 113, which has an operation key section 200 corresponding to the keyboard 115 described above and a display section SOO corresponding to the display 116.

In this case, the operation key part 200 has a display on the upper part of the diagram used in the marking mode, and 9P, IN key 20
1, M, HEAD key 202°M, CHANG,
key 203, INDEX key 204.

P, OUT key 205. M, E' Outside the HD key 206, VERIFY -'! --207, 5TART key 20B, 5TOP key 209, and numeric keys 210, 211, 212 from 0 to 9 that are displayed in the lower part of the illustration
(However, for 0 to 6, the above 201 to 207 are also used) and the MARK key for mode specification, which has a display on the key itself that also serves as the 1 to 6 numeric keys 202 to 207, R
EAD key, 5AVE key, LOAD key, CUT key, CHECK key and the 5TEP key, which has a display in the lower part of the figure where the above 208 and 209 are also used, ENTER
It has a key.

In addition, the operation key part 200 includes light emitting diodes LμDI as KYE MODE indicators in the upper and lower parts of the figure.
r LED 2 is attached.

The display unit 300 is a 7-segment light emitting diode displaying a 2-digit MOD display in the upper part of the figure.
E display so 1, TNO display 302, index X display 303, MIN display 304, SEC display 305, A, MIN display 306, A, SEC
Display 307 and 1 digit A, FRAME display 30
B, and each of the above-mentioned indicators 302 to 302 have a display in the lower part of the figure.
308 is also used as a N1-+Jta (catalog number) CATALOGNTJMBER display.

Note that there is a MUS between the operation section 200 and the display section 300.
Light emitting diodes LEDa and LED4 are attached as IC and LEAD-IN indicators.

First, the usage format and display format of each of the above-mentioned operation keys and indicators 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.

CM, CHANG, key 203] This key is operated between songs when the song changes.

[INDEX key 204] This is the key operated when incrementing the index X. [P, OUT key 205] This is the key operated when entering the lead-out area at the end of the program area.

CM, END key 206] This is the key operated at the end of the song.

(VERIFY #-2o y, 1 When in program save mode, the saved program information is compared with the program information stored in the subcode generator to confirm whether it has been recorded accurately. This is the key.

[: 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.

[0-9 number keys 201-207, 210-212] TNO and Q signal mode of 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, checking or changing program information written in advance in the program check (change) mode.

[ENTER key 209] In read mode, first song TNO-Q No. 8 m
This key is operated to move the cursor (decimal point) one character to the right when inputting data of ode -2 and when in the Glodarum change mode.

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

[MODE display 301] Displays each operation mode with numbers and alphabets, and there are 13 types (7) used in this case.
7 HetILHbr'CHdrerfrh+1+jr
t r p r u z q is displayed in the form shown in FIG.

[TNO, X, MIN, SEC, A, MIN
, A. SEC.

A. FRAME display 302 to 308] Track number (TNO) is displayed in read mode, cutting mode, and program check (change) mode, respectively.
, index (X), opening time minutes, seconds (MIN)
, (SEC), absolute time from the beginning of the first song,
seconds (A, MIN).

(A, 5EC), also an absolute frame (A, FRAM
E) is displayed numerically.

[CATLOG NUMBER display 302-308]
This is displayed when inputting the catalog number of mode -2 of the Q signal in the read mode.

CMUSIC display LED 3) Lights up when in the program area during cutting mode.

(LEAD-IN indicator LED 4) Lights up in the lead-in area during 1 cutting mode.

(KEY-MODE indicator LED1 r LED2
] Of the above-mentioned operation keys, the light is lit depending on which of the upper and lower operation keys is being operated.

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

[Marking (MARK) mode]

This is a mode for marking the beginning of a song 41 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] This is a mode in which data necessary for generating a subcode (EFM) signal is recorded at the beginning of the audio track of the video tape.

[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]

Mode for generating a subcode (EFM) signal As mentioned above, by generating a subcode signal to be encoded into the main code signal and then having the encoder perform the necessary encoding processing, the master recording signal can be generated. This is the mode that derives .

[Program check (CHECK) (change)%-
This mode is for checking and changing the time at 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, turn on the power as shown in Figure 11)
The mode specification wait state (however, this state is always set to temporarily return to this state even when each operation described later is completed) is entered into 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 numeric keys] 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 (change) (CHECK) mode And the first thing specified is marking (MA, RK).
, ) mode foot, followed by P, IN +' M, HEAD, M, C that should be operated in marking mode.
HANGE.

The shimmering operation is performed by operating the INDEX, P, OUT, M, and END operation keys 201 to 20.6 according to a related check program as shown in FIG. 12, for example.

Note that the M, END key 206, which is operated at the end of the song, will be pressed to P, OUT within 10 seconds after the key 206 is pressed.
When the key 205 is operated, the operation of the corresponding key 206 is
, OUT key 205 is interpreted as an operation of P, OUT key 205, and the operation of OUT key 205 is ignored. However, this means that between the operation of the M, END key and P, OUT key, the M, HEAD key, M, CHANGE
Excluded when there is a key operation.

Also, the operations of the M and END keys before M and HEADO can be omitted, but in this case, the M and END keys can be omitted.
is processed as being, for example, 3 seconds before M and HEAD.

Here, if the M, END keys, and K HEAD keys are pressed intermittently at a relatively fast cycle, the result will be as shown in FIG. 13(a).

As shown in (b), in the former case, if the intermittent operation time is less than 7 seconds, the last one will be accepted, and in the latter case, if the total intermittent operation time is less than 10 seconds, for example, 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 which case it is assumed that M and HEAD are present after, for example, 3 seconds after P and IN. .

Next, as shown in Figure 14, the READ mode is specified, and this is an operation that reads the marking signal marked on the videotape in the marking mode and creates lead-in information (TOC data) and program information. It is something that cannot be done.

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

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

For example, to enter '16'' as TNO, first press the number key at 1 st, then press the ENTER key, and finally press the number key tt 6 pp. The display format of 302 is as shown in FIGS. 15(a), (b), and (c).

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

When the TNO data input is completed, the user next operates the STE'P key 208 to enable input of the catalog number, and inputs a 13-digit catalog number in the same manner as the above-mentioned method of inputting the TNOO.

After completing the input of the catalog number with K in this way, operate the 5TEP key 20g again (if the catalog number /S- is OK with °゛0'', immediately press the 5TEP key 20g).
(This can be done by operating the EP key 208.) In particular, the mode is set so that the previously marked marking data can be read.

This mode is shown in FIG.
After playing TRJ 10, press 5TART key 20
All you have to do is operate 8.

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

If reading error display 2E is displayed during this time, V
All you have to do is rewind TR110 and redo some of the strange operations.

Furthermore, if a syntax error display 2d is displayed due to a mark mistake, the user can either operate the 5TOP key 209 to temporarily enter a mode waiting state and then correct it in a program change mode to be described later, or switch to marking mode again and slightly correct the marking.

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

Then, with the VTR 110 in the post-recording state, 5TART
Operate the key 20B 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 (VERIFY) the videotape.
) mode.

As a result, when reading is performed and the reading 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 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 set in advance at the portion before the above writing, and then the VTRJZO is put into the play state and the 5TART key 20B is operated.

As a result, when the program is loaded and the load completion display is displayed, the VTR 110 is stopped and the 5T
Operate the OP key 209.

If the reading error message 4E is displayed during this time, all you have to do is try again.

Next, a case will be described in which the program check (CHECK) (change) mode for data checking as shown in FIG. 19 is used.

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 odor change mode described later.

Please check this program (CHECK)
Change) mode is program data 5TEP key 20B
Each time the button is pressed, one state (one command) is displayed, and the program data can be changed as necessary.

20(a) to (h) are the above-mentioned S TEP keys 20B.
This shows a display example of each data displayed by the operation.

If changes are made, see Figures 21 (a) and (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 (M, HEA in the figure).
An example is shown in which A and SEo 14 seconds are changed to 11 seconds as a case where the time of D 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, hold the VTR 110 in a pause state, and then operate the CUT key 206° and TART key 2θ8 to release the pause state of the cage VTR 110 and start cutting. Finally, when the end of the cutting program is displayed, operate the 5TOP key 209.

In this case, first, the data in the series lead-in area is output by operating the 5TART key 208, and then the data in the series lead-in area is output.
When 0, P, or IN data is entered or the 5TART key 208 is operated, the data in the program area is output, and finally, when the data in the program area is finished, the data in the lead-out area is output. , during this time, MU is displayed according to the display format of the MODE display 301
SIC indicator LED3. LEAD-IN indicator LED
The display state of No. 4 is as shown in FIG.

In addition, in Fig. 20, (f) is M, C) IANG,
2 seconds before M, the interval between END and IVL HEAD is 2
This is the display that appears when the seconds are very small. 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 indicates that the item marked at the relevant time is a syntax error. Therefore, it is best to take the context into account and correct it.

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

First, regarding the 200 operation keys, some of the operation keys have indications in the upper part of the diagram used in the marking (MARK) mode, such as 9P, IN key 201,
M, HEAD key,? 0,? ,M.C.A.
NG key 20B, INDEX key 204, P
, OUT key 2θ5°M, END key 206 and VE used in program save (5AVE) mode
The RIFY key 207 is also used correspondingly to the numeric keys O to 6 among the numeric keys displayed in the lower part 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 RE
By being used as the AD key, 5AVE key, LOAD key, and CUT key (however, the P and IN keys 201 are excluded), the number of keys required as a whole can be significantly reduced, reducing costs. This can contribute to improving the space factor of the panel, and in order to ensure that these three types can be used interchangeably, that is, used properly, the key modes of the illustrated state are displayed in association with each other. The key point is that a KEY MODE indicator consisting of light emitting diodes LED 1, LED 2, etc. is provided.

Regarding key operations for mode specification, the keys themselves have a display, and since they are operated at the beginning of each mode, it is possible to display the operation status of these keys. No additional display is attached to this part, and a MODE display soi is separately provided on the display section 30θ 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 distinctive features is that the display of each mode and the display according to the progress state in each mode can be made on the same display.

The knob p and MODE display 301 each consist of a 2-digit display made of 7 segment light emitting diodes,
Its one-digit display displays the mode number 1 to 6, which corresponds to the operation of the mode designation key, and the other 1 digit indicates the progress status of each mode from 1 to 6 above. Alphapella mapped accordingly) 1hzbzQsdr8
゜f, b * i s j r L r p r u
It is possible to display each mode and the progress status of each mode on the same display by changing the display format, such as displaying the status of p O (however, the actual display format is as described above). However, if this configuration were not adopted, the number of display devices corresponding to the number of modes and the number of progress states for each mode would have to be provided. This is because the number of displays 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
A step (5TEP) key and an enter (EN) key are also used in correspondence with the 0B and 5TOP keys 209, respectively.
TER) key and the read mode and program check 4
One point is that the configuration is such that it can be used isometrically in two modes: the pick (change) mode. This allows m of the TNO and Q signals of the first song in read mode.
The function of inputting (including correction) ode-2 data and the function of reading and checking or changing program information written in advance in program check (change) mode can be reasonably performed using the same key. However, compared to having these keys separately for read mode and program check (change) mode,
This reduces the number of required keys and can contribute to cost reduction and improvement of the panel space factor.

As for the display section 300, a 2-digit TNO display 302 and an index
, SEC display 304°A, MIN display 305. The SEC display 306, single digit A, and FRAME display 307 are displayed at the bottom of the figure.
By being used as the N13 catalog number display, the number of displays required as a whole can be significantly reduced, contributing to cost reduction and an improvement in the panel space factor. 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 each of the remaining displays 301 to 307 for displaying program information It is important that the catalog number, which requires display of digits, be displayed in just the right amount.

Next, a description will be given of matters that can contribute to improving the operability and ensuring the reliability of operation for each operation mode, which have also been specifically implemented.

First, in the marking mode, the M and END keys 206, which are operated at the end of the song, are pressed and the P and OUT keys 206 are pressed within a predetermined time, for example, 10 seconds.
5 is operated, the operation of the corresponding key 206 is P, OUT.
The point is that the operation of the P and OT keys 205 is ignored as it is interpreted as an operation of the key 205.

This is because operating the knob, P, and OUT keys 205 specifies that the program area will end and the program will enter the lead-out area without changing the settings.
The P and OUT keys 205 should originally be operated at the end of the last song. However, after a predetermined time has elapsed (within 10 seconds) after operating the M and END keys 206, assuming that the next song is available, the player presses the P and OUT keys again.
Since the user operated the END key 205, it is the point when the original program area ends and the lead-out area should be entered.
, it is assumed that the OUT key 205 has been operated.

This eliminates the need to re-do the operation and contributes to simplifying the operation and ensuring reliable operation.

However, M, END before M, HEADO can be processed as if it was a predetermined time, for example, 3 seconds ago, and M, f (M, END before EADO can be omitted and the key operations can be changed accordingly) The main point is that the system has been simplified.

When the M, END, and HEAD keys are operated intermittently at a relatively fast cycle, the former will be accepted 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, the first song M, HEAD 11-1. P, I
M and HEA after J, P, and IN are processed as if a predetermined period of time, e.g., 3 seconds, had passed after N.
The fact that the D key operation can be omitted makes the operation much simpler.

In addition, P and IN were adopted as marking signals.

M, HEAD, 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.

Secondly, it is equipped with a function to check the saved data as a VERIFY mode in the program save (5AVE) mode.
One point is that the reliability of operation is ensured.

Also, program check (CHECK) (change)
In the mode, the programmed data can be displayed and checked for one state each time the 5TEP key 20B is operated.
One point is that the reliability of operation is ensured.

If there is any data that you would like to change during this check, you can easily change the program data by pressing the ENTER key 209, moving the cursor to the part that needs to be changed, and operating the numeric keys. What is being done is also important.

Furthermore, in the READ mode, syntax errors due to mark mistakes can be displayed 2d, thereby ensuring reliability of operation.

Similarly, read error display 2E in read mode, write error display 3E in verify mode, and read error display 4E in program load (LOAD) mode are displayed separately. One point is that the reliability of operation is ensured.

Each of these errors, especially syntax error display 2. It is also important that if error d occurs, the error can be easily corrected by performing the above-mentioned program check command.

Furthermore, in the cutting (CUT, ) mode, data in the pIJ-doin area is first output by operating the 5TART key 20B, and then P and IN data is input from the VTR 110 or when the 5TART key 208 is input.
An example of this operation is that the data in the program area is output by the operation, and finally, when the data in the program area is completed, the data in the lead-out area is output.

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 not only simplifies operation and improves reliability, but also improves the efficiency of each mode. It is also important that a highly desirable subcode signal generator with a high level of functionality can be realized by the combination of the subcode signal generator and the subcode signal generator.

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
A highly improved encoding system that enables generation of the subcode signal to be encoded into the commercial main code signal accurately and with simple operations, thereby satisfying advanced functions and performance. This makes it possible to provide a disc record master recording device.

[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. It is a diagram for explaining a specific example of the diagram. 110...VTR, 111...PCM processor,
112... Encoder, 1-3... Subcode signal generator, 114... Control circuit, 115... Keyboard, 116... Display, 117, 118... Input/output interface, 114g. ...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,
201...P, NH key, 202...yl, north AD
Key, 203...M, CHANG, Key, 204...
...INDEX key, 205...P, OUT key,
206...Fox END key, 207 ・VE';RI
FY key, 20 B-8TART key, 209...5
TOP key, 200-212... Number keys, 202.
・・MARK key, 203 ・REA key, 204・
5AVE key, 20.5-LOAD key, 206-...
CUT, key, 207...CHECK key, 20B.
...5TEP key, 209...ENTER key, 30
1...MODE indicator, 302...TNO indicator,
303... Index (3) indicator, 304...
MIN display, 305...SEC display, 306...
・A, MIN display, 307...A, 8EC display, 308...A, FRAME display, 302-30
8... Catalog number display, LED 1,
LED 2...KEY MODE indicator, LED 3
...MUSIC display, LED4...Lead-in display. Applicant's representative Patent attorney Takehiko Suzue Figure 11 Figure 12 Figure 13 M, ENL) Mhi-NLI Mhi-NLI
M hahi ALIM 目hi ALI Figure 14 Figure 16 Figure 18 v! J (a) (P, IN) Figure 20

Claims (1)

[Claims] A video tape recorder loaded with a video tape on which a PCM main code signal is recorded in advance on a video track, and a desired marking signal corresponding to the main code signal at a predetermined position on an audio track of the video tape recorder. a sub-code signal that records the above-mentioned main code signal, measures the generation time of a reproduction marking signal from the video tape recorder, and generates and stores data necessary for generating a sub-code signal corresponding to the main code signal based on the measured time data; a PCM processor that performs predetermined digitization processing on the reproduced main code signal from the video tape recorder; 1. A disc record master recording device comprising an encoder that encodes a subcode signal generated from a generator, performs necessary encoding processing, and outputs a master recording signal.