JPH0766615B2 - Disk recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described in the following order.

A. Industrial field of use B. Outline of the invention C. Prior art D. Problems to be solved by the invention E. Means for solving the problems F. Action G. Example G-1. Structure G -2. Procedure for creating a catalog G-3. Operation for additional recording G-4. Operation for generating time code data H. Effects of the invention A. Industrial field of application The present invention applies laser light to a recordable optical disc. The present invention relates to a disc recording / reproducing apparatus for recording / reproducing data, and more particularly to a disc recording / reproducing apparatus capable of additionally recording new data without interruption immediately after already recorded data.

B. Outline of the Invention The present invention synchronizes the encoder with the decoder in a state where the delay time until the reproduction decode signal is determined is corrected in the encoder when newly recording additional data after the recorded data on the disc. As a result, new data is continuously recorded immediately after the already recorded data.

C. Conventional Technology In a recordable disc, address information and sync signals are generally recorded in advance on the disc together with a tracking guide groove.
By using this address information and the synchronizing signal, data is recorded at a predetermined position on the disc, and the recorded data is accessed to reproduce the data.

By the way, if the recording format of the data recorded on the disc is the same as the format of a digital audio disc (hereinafter referred to as DAD) called a so-called compact disc (CD), a frame synchronization signal,
And the time code as the address information is recorded together with the data. Therefore, in this case, the tracking guide groove is used, but the sync signal and the time code are not recorded in advance on the disc.

When data is recorded on a disc using such a recording format, an error will occur in the reproduced data if the recorded data has a double recording or a missing portion due to discontinuous recording of the data. This double recording or data loss due to discontinuous recording causes the recording operation from the reproduction operation when trying to record new data immediately after the already recorded data without recording all the data at once. It occurs when the switching timing to is incorrect.

Therefore, it is conceivable to use a reproduction signal from the disc as a means for obtaining this switching timing. FIG. 11 shows a time chart in the case of using this reproduced signal to additionally record new data after the already recorded data. Here, the waveform a is the already recorded data on the disc, and the waveform b is the new recorded data additionally recorded after the already recorded data.

By the way, as shown in FIG. 11B, the reproduction decode signal (reproduction signal) is settled by a time t after the reading of the recorded data by the optical pickup. Therefore, when the end point of the recorded data based on the decoder output is detected, the position of the optical pickup will pass the end point of the recording on the disc. Figure 11D at this point
Even if the encoder output as a recording signal is turned on and the recording operation is started as shown in FIG. 11, the new recording data b is recorded discontinuously after the already recorded data a as shown in FIG. Become so. Here, FIG. 11C shows a reproduction synchronizing signal, and FIG. 11E shows an encoder synchronizing signal.
In this way, when it is attempted to obtain the switching timing using the reproduction signal from the disc, discontinuous recording of data will occur.

Therefore, it is conceivable to turn on the encoder output earlier by considering the above-mentioned delay time t, but if the reproduction operation is switched to the recording operation only at the timing of the recording encoder, double recording of data may occur. become.

D. Problems to be Solved by the Invention In the conventional disc recording / reproducing apparatus that records data in the same format as the DAD on the recordable disc and reproduces the recorded data, after the recorded data, If you try to record new data,
There is a problem in that data is lost due to double recording or discontinuous recording, and an error occurs in reproduced data. Further, when data is recorded discontinuously, there arises a problem that high-density recording cannot be performed.

Therefore, the present invention was proposed to solve such conventional problems, and new data can be additionally recorded without interruption immediately after the data already recorded on the disc. An object of the present invention is to provide a disc recording / reproducing apparatus capable of preventing data loss due to double recording or discontinuous recording, suppressing the occurrence of errors during reproduction, and capable of high-density recording.

E. Means for Solving Problems The disk recording / reproducing apparatus converts the input data into the recording data of a predetermined recording format by the encoder, adds the synchronization signal at the timing of the encoder synchronization signal, and records the data on the disk. A disc recording / reproducing apparatus that reads the above recorded data with an optical pickup, converts it into a reproduced decode signal by a decoder, and outputs the reproduced decoded signal. The encoder additionally records new recorded data on the disc immediately after the recorded data. In doing so, the encoder synchronization in synchronization with the reproduction synchronization signal from the decoder is corrected in a state where the delay time until the reproduction decoding signal is fixed in the decoder is corrected with respect to the reading of the recorded data on the disc by the optical pickup. Generate signals and record input data in a predetermined recording format Data is converted into an encoder sync signal and a sync signal is added and output at the timing of the encoder sync signal, and the encoder sync signal is corrected for the delay time required for the encode operation to the recording status. Is generated and output.

F. Action Therefore, in the present invention, since the encoder is synchronized with the decoder and the delay time until the reproduction decode signal is determined is corrected in the encoder, new data is added without interruption immediately after the recorded data. Can be recorded.

G. Examples Hereinafter, examples of the present invention will be described in detail with reference to the drawings.

G-1. Structure First, the structure of a disk recording / reproducing apparatus according to an embodiment of the present invention and the system controller of this apparatus will be described with reference to FIGS. 1 and 2.

In FIG. 1, a spindle servo block 2 placed under the control of a system controller 1 controls a spindle motor 3, whereby a non-erasable write-once optical disc 4 rotates at a predetermined rotation speed. To be done. The optical pickup 5 for writing and reading data to and from the disk 4 is controlled by the focus tracking servo block 6 so that the laser light is properly focused on the disk recording surface. The servo block 6 is placed under the control of the system controller 1.

Further, the input data input from the terminal 7 is supplied to the encoder 9 via the input data interface 8.
A reproduction synchronization signal from the decoder 10 and a control signal from the system controller 1 are supplied to the encoder 9 which converts input data into a predetermined recording format. Further, the time code data recorded together with the input data is supplied to the encoder 9 from the time code generator 11 under the control of the system controller 1 through the switch 28. The time code data from the outside is input from the terminal 29 and selectively supplied to the encoder 9 via the switch 28. The encoded output of the encoder 9 is sent to the optical pickup 5 via the modulator 12. As a result, data is recorded on the disk 4 by the laser light whose light intensity is modulated by the encode output.

In reproducing the data recorded on the disk 4, the data read by the optical pickup 5 is supplied to the RF amplification demodulator 13. The data (demodulated pulse train) demodulated into a predetermined pulse train by the RF amplification demodulator 13 is sent to the decoder 10 under the control of the system controller 1. The decoder 10 separates the sync signal from the demodulated pulse train and demodulates the data. The decoded output of the decoder 10 is divided into reproduction data and time code data, and is taken out as output data from the terminals 15A and 15B via the output data interface 14. Further, the time code data from the decoder 10 is input to the system controller 1.

Next, the configuration of the system controller 1 will be described with reference to FIG. 2. The encoder control unit 16 outputs an on / off signal, a synchronization permission signal, etc. to the encoder 9 and outputs a status signal and a timing signal from the encoder 9. receive. Further, the servo control unit 17 outputs a control signal to the servo blocks 2 and 6 and receives a status signal and the like from the servo blocks 2 and 6. In addition, the time code generator control unit 18 outputs new time code setting data (preset data) and operation command signals to the time code generator 11. Further, the display control unit 19 outputs a display control signal to the display unit 20 which displays the current playing time and the state of the device. Each of the control units 16, 17, 18, and 19 is subjected to a series of controls by the control calculation processing unit 21.

Further, the time code reading unit 22 is supplied with the time code data in the reproduction output from the decoder 10.
The output of 22 is processed by the control calculation processing section 21.

Further, the catalog information storage unit 23 stores the catalog information created by the processing unit 21 based on the time code data, and the catalog information is read and referred to as necessary.

Further, a detection signal indicating whether or not the disc 4 is mounted (whether or not there is a disc) is output from the terminal 24 by the processing unit 21.
Is input to. Playback from disk 4 from terminal 25
An inspection signal indicating whether or not there is an RF signal is input to the processing unit 21. When the operation switch is operated, an operation input signal is input from the terminal 26, and this input signal is sent to the processing unit 21 via the operation input interface 27.

FIG. 3 shows a recording format of data recorded on the disc 4 by the disc recording / reproducing apparatus having such a configuration. This format is the same as the recording format of the DAD. In the example shown in FIG. 3, for example, four data (tunes) are recorded in the already recorded area of the disc 4, and the areas after the already recorded area are unrecorded areas. In FIG. 3, the horizontal axis indicates the distance from the inner circumference of the disk, that is, the distance in the longitudinal direction of the track, and the vertical axis indicates the total time. MN is a data (song) number, P is a pause period, Ttoc is a recording start time of each data (song), and Tlast is a final recording time. The broken line indicates the total recording time, and the solid line indicates the recording time of each data (song).

G-2. Procedure for Creating Catalog Next, the procedure for creating a catalog of the recorded data recorded on the disk 4 will be described step by step with reference to the flowchart of FIG.

In FIG. 4, in step, the processing section 21 determines whether or not the disk 4 is mounted based on the detection signal from the terminal 24. When the disk 4 is not mounted, the process goes to the waiting state at branch N, and when it is mounted, the process proceeds to step S at branch Y.

In the step, in the mode of reproducing the catalog area on the disk 4, the processing section 21 judges whether or not the catalog of the disk 4 is already recorded based on the detection signal of the reproduction RF signal from the terminal 25. Be done. If the catalog is recorded, the process proceeds to branch Y, and if it is not recorded, the process proceeds to branch N.

In step, the catalog recorded on the disk 4 is read, the catalog information is stored in the time table on the catalog information storage unit 23, and then the process proceeds to the next step. In the step, in the reproduction mode of the recorded data, the processing section 21 determines whether or not there is data already recorded on the disk 4 based on the detection signal of the RF reproduction signal from the terminal 25. If the data is recorded, the process proceeds to step Y at branch Y. If it is unrecorded, the process proceeds to branch N and the unrecorded disc process is performed.

In the step, the last recording point (Slast in FIG. 3) of the already recorded data is searched in a short time by the two-division method or the like. When detecting the last recorded point, the RF input to terminal 25
The detection signal of the reproduction signal is referred to and the servo blocks 2 and 6 are controlled and performed. If the final recording point is found here, the process proceeds to the step.

In the step, the time code data of the recorded data at the final recording point, that is, the total recording time Tlast, the final data (song) number MNlast, the recording time T of the final data (song)
Each data of _MNlast is read, and the process proceeds to step. Here, this time code data is sent to the processing unit 21 via the time code reading unit 22.

At the step, the last recording time Tlast is set to the address Tend in the time table (shown in FIG. 5) on the storage unit 23.
The final data (song) number M Nlast (MNlast = 4 in this example) is stored in the address MNl. Then proceed to the step.

In step, the recording start time of the final data (song) number
Ttoc _(last) (Ttoc _{(4) in} this example) is calculated by performing the operation _Tlast -T _{MNlast in} the processing unit 21, and is assigned to the corresponding address in the above timetable (address of song number MN4 in this example). Store and proceed to step.

In the step, the pointer MNP of the data (song) number to be searched is initialized by the above M Nlast, and then the process proceeds to the step.

In the step, 1 is subtracted from the above MNP to advance the pointer, and then the process proceeds to the step.

In the step, it is determined whether MNP = 0. If it is zero, the process proceeds to branch Y and the timetable creation is completed. If it is not zero, the process proceeds to step N.

In the step, a time table of the data (song) number in which MNP is increased by 1 in the register (register value is Ts) in which the position information for moving the optical pickup 5 to the inner side of the disk 4 is sought. Content of Tt
Store oc _{(MNP + 1)} and proceed to the step. Where MNP is 1
The content of the timetable of the increased data (song) number is already fixed.

In the step, the offset time T ₀₁ considering the shortest data (song) length, pause period, etc. is subtracted from the above Ts, and this value is set as a new Ts. That is, the process of Ts ← (Ts-T ₀₁ ) is performed. Then proceed to.

In step, seek to the point of Ts set in step. That is, the optical pickup 5 moves from the rest position (final recording point position) to the Ts point determined in the step on the inner circumference side of the disk 4. Then proceed to the step.

In step, the data (song) number MN of the seeked point
It is determined whether R is equal to the pointer MNP defined in step. If they are equal, branch Y is taken to step, and if they are not equal, branch N is taken to step. Here, when MNP = MNR in the first loop, for example, when seeking from Tlast to Ts point, the optical pickup 5 enters the area of MN = 3 in FIG.

In the step, the time code data of the seeked point is read, and the total recording time T _A and the recording time T _MNP of the data (song) number at that point are used to _calculate the data (song) number MN.
Calculate the recording start time Ttoc _(MNP) of P. This process is indicated by Ttoc _(MNP) ← (T _A -T _MNP ). The obtained Ttoc _(MNP) is stored in the corresponding address area of the timetable. After that, the process is repeated and the operation is repeated.

In step, the data (song) number of the seeked point
The MNR and the pointer MNP are compared with each other, and if it is determined that MNP <MNR, that is, if it is not possible to seek into the next data (music) number area, the process proceeds to step Y in the branch Y. Also MN
If P> MNR and it is determined that the seek has exceeded the next data (song) number area, the process proceeds to step N at branch N.

In the step, the offset time T ₀₂ is added to Ts indicating the seek point to newly define Ts. This operation is indicated by Ts ← (Ts + T ₀₂ ). Where T ₀₂ <T ₀₁ . Then, proceed to the step.

In the step, a new Ts is determined by subtracting the offset time T ₀₂ from Ts indicating the seek point.

This operation is indicated by Ts ← (Ts-T ₀₂ ). Then, proceed to the step.

Here, a series of operations in each of the steps described above is performed by the control calculation processing section 21.

By the processing described above, a time table in which the catalog information is stored is created in the storage unit 23 in the case of this example, for example, as shown in FIG. In FIG. 5, MN is a data (song) number and MNs is the first data (song) number.

As described above, in the above-described cataloging procedure, the final recording point of the recorded data on the disc 4 is detected, the recording start point of the data (song) is obtained, and the seek is made to the previous data area to find the data. Since the recording start point of (music) is obtained, a time table (list) of recorded data can be created in the storage unit 23 in a short time.

In particular, in the write-once type optical disk 4 that cannot be erased, the catalog could not be recorded in the catalog area of the disk 4 until after the recording of all data was completed, but the catalog was created under the system controller 1 in a short time by the above-described catalog creating procedure. It can be created, and by reading out the catalog information from the storage unit 23 and referring to it, the recorded data on the disk 4 can be accessed at high speed.

By the way, the recording data can be read out even during the process of searching for the final recording point of the step in the above-mentioned cataloging procedure, and the recording start point of the recording data read at that time should be obtained and stored at the address in the corresponding timetable. Thus, it is possible to reduce the number of time-consuming seeks performed later. This makes it possible to create the catalog in a shorter time.

By reading the recorded data even during the seek operation in the step, the read data (song) number is set to the pointer MN even before the point indicated by Ts is completely reached.
If it matches P, the recording start point of the data indicated by the pointer MNP can be obtained at that time, and the seek operation can be ended. Even if the read data (song) number does not match the pointer MNP, if the corresponding timetable is not confirmed yet, the recording start point of the data (song) number obtained in the timetable can be stored at this time. The processing time can be shortened.

Also, after creating the timetable, add new data to disk 4
If additional recording is performed on the time table, the time table on the storage unit 23 may be additionally updated.

In addition, the recording of the data on the disc 4 is completed,
When recording an inventory in the upper inventory area, the above-mentioned storage unit 23
The catalog information may be read from the above time table, converted into a predetermined format shown in FIG. 6, for example, and the catalog recorded on the disk 4. In FIG. 6, MN indicates a data (song) number, MNs indicates a first data (song) number, and MNl indicates a last data (song) number.

G-3. Operation of Additional Recording Next, an operation of recording data on the disc 4 by the disc recording / reproducing apparatus will be described.

FIG. 7 is a block diagram showing the internal structure of the encoder 9. In FIG. 7, the data output from the interface 8 is input to the input data interface 30 through the terminal 31, and the time code generator is input.
The time code data from 11 is input from terminal 32.
The interface 30 temporarily stores input data, switches between time code data and recorded data, and the like. The output of the interface 30 is
The data is sent to the pattern conversion unit 33 that converts the data into a predetermined pattern suitable for recording. The output of the conversion unit 33 is processed by a parallel-serial conversion / modulation unit 34 that converts data from parallel to serial and performs modulation, and then is output from a terminal 35 and supplied to the modulator 12. The output of the reference signal oscillator 36 that generates the master clock that determines the operation of each block is the timing signal generator 37 and the synchronization signal generator.
Is being supplied to 38. A reproduction synchronizing signal (FIG. 8C) from the decoder 10 is input to the synchronizing signal generator 38 from a terminal 39, and a synchronization permission signal (FIG. 8D) from the system controller 1 is input to a terminal 40. Will be entered more. Further, in order to correct the delay time d until the reproduction decode signal (FIG. 8B) of the decoder 10 is fixed rather than reading the already recorded data (see FIG. 8A) on the disk 4 by the optical pickup 5. The sync offset signal is input from the terminal 41 to the sync signal generator 38. The synchronization signal generator 38 also compensates for the delay time of data processing in the encoder 9. The encoder synchronization signal (FIG. 8E) which is the output of the synchronization signal generator 38 is obtained from the terminal 42 and supplied to the time code generator 11 and the like, and the encoder output on-timing signal (from the terminal 43) FIG. 8F) is sent to the system controller 1. The output from the signal generator 38 is
It is supplied to the timing signal generator 37 that generates various timing signals for internal operation, and the timing signals of the signal generator 37 are supplied to the interface 30, the converter 33, and the parallel-serial converter / modulator 34, respectively. . In addition,
The sync signal from the sync signal generator 38 is a pattern converter.
The data is also sent to 33, and the conversion unit 33 inserts the synchronization pattern into the data.

By the way, when recording data on the disc 4,
First, the system controller 1 judges whether or not the data is already recorded on the disc 4 to be recorded, and if it is the unrecorded disc 4, the optical pickup is performed to the first portion (innermost circumference side) of the data recording area. 5 is moved, and data recording is started based on the timing signal of the encoder 9.

If the data is already recorded in all the recording areas of the disc 4, the recording operation is stopped.

Also, although data is recorded, an unrecorded area remains (see FIG. 3), and if new recording of new data is possible, additional recording of new recording data is performed based on the following operation procedure. Is performed.

The operation of this additional recording will be described with reference to the time chart of FIG.

First, the optical pickup 5 is moved to the final recording point of the recorded data, the time code of the final recording frame is read, and this time code is stored under the system controller 1.

Next, the optical pickup 5 is returned to the inner circumference side of the disc by the number of frames (for example, one track) sufficient to synchronize the additional recording.

Next, in order to synchronize the encoder 9 with the reproduction synchronization signal (FIG. 8C) from the decoder 10, the synchronization permission signal is turned on as shown in FIG. 8D. This permission signal is supplied from the system controller 1 to the encoder 9. By this synchronization permission signal, the reproduction synchronization signal and the internal operation timing of the encoder 9 are synchronized, and the encoder synchronization signal (8th
FIG. E) is synchronized with this reproduction synchronization signal. Along with that, the delay time d is based on the synchronization offset signal.
Is corrected. As a result, as shown in FIG. 8E, an encoder synchronization signal which is synchronized with the reproduction synchronization signal and whose delay time d is corrected is output from the point A position.

Further, as shown in FIG. 8F, an encoder output on-timing signal in which the delay time of signal processing in the encoder 9 is compensated is output from the encoder 9 to the system controller 1.

The system controller 1 reading the time code data of the reproduction decode signal (FIG. 8B) reads the time code data one frame before the time code data of the last recording frame (see FIG. 8C). At point (b), it is determined whether or not recording data and the like are prepared and data can be recorded on the disc 4.

If the system controller 1 determines that recording is possible at this time, based on the timing signal of the encoder 9,
The recording operation (sending of a command signal) is started while referring to the time code data from the reproduction decode signal (eighth embodiment).
(Figures F, G).

At this time, the encoder output ON signal shown in FIG. 8G is output from the encoder 9 to the system controller 1 and the recording signal (H in FIG. 8) which is an encoder output is output to start recording on the disc 4. It Here, the recording signal is delayed by the delay time of the signal processing in the encoder 9 as shown in FIG. 8H.

Therefore, the recording signal is the recorded data of the disc 4
Synchronization is continuously applied to the upper position, and new recorded data is recorded on the disk 4 immediately after the already recorded data and without interruption, as shown in FIG. 8A.

As described above, in the disc recording / reproducing apparatus, the decoder
Since the encoder 9 is synchronized with the reproduction sync signal of 10 and the delay time of the signal processing in the decoder 10 and the encoder 9 is corrected and the encoder output on-timing signal is output, it stabilizes immediately after the recorded data. New recording data can be recorded continuously.

Therefore, data loss due to double recording or discontinuous recording does not occur during additional recording, it is possible to prevent an error from occurring during reproduction, and it is possible to perform high-density recording.

G-4. Time Code Data Generation Operation Next, when new recording data is additionally recorded immediately after the already recorded data on the disc 4 by the disc recording / reproducing apparatus, the time code data of the already recorded data is added. The operation of generating time code data of continuous new recording data will be described.

First, the internal structure of the time code generator 11 for generating time code data will be described with reference to the block diagram of FIG.

In FIG. 9, the system controller 1 inputs the time code initial value preset data, which is new time code setting data, and the operation command signal for the start command and the stop command to the time code generation control unit 45. Here, a key operation input signal is input to the system controller 1 by operating a start key, a stop key, a data (music) number change key, and an index key. The preset data is the data (song) number (TNO) and the continuous recording time (TNO) within that data (song) number.
IME), total recording time from the recording start point on the disc (A
TIME).

In addition, the control unit 45 controls the first, second and third time code output registers 4 which temporarily store the time code data.
It is connected to 6,47,48. Here, the register 46 stores the data (song) number (TNO), the register 47 stores the recording time (TIME) at the data (song) number, and the register 48 stores the total recording time (ATIME). Further, each data in the registers 46, 47, 48 is arithmetically processed in an adder / subtractor 49 which operates by the arithmetic control signal of the controller 45. Further, the parallel-serial conversion shift register 50 to which the subcode synchronization signal from the encoder 9 is input as a load signal
Then, each data of the registers 46, 47, 48 is fetched. When the frame synchronization signal from the encoder 9 is supplied to the shift register 50 as a shift clock, the time code data is output from the shift register 50 to the encoder 9 as serial data. Here, the control unit
The control signal from 45 is supplied to the shift register 50, and the subcode synchronization signal is supplied to the control unit 45.

Next, the operation of setting the time code data of the new recording data will be described with reference to the flowchart of FIG.

First, in the system controller 1, the time code reading section 22 takes in time code data (TNOe, TIMEe, ATIMEe) of the last recorded point of the recorded data. Here, TNOe is the data (song) number at the last recording point, TIMEe is the recording time at that data (song) number at the last recording point, and ATIMEe is the total recording time at the last recording point. Further, the control calculation processing section 21 of the system controller 1 creates the preset data from the time code data (TNOe, TIMEe, ATIMEe) as follows.

First, when the data (song) number (TNO) is changed and additional recording is performed, the data (song) number (TNO) of the preset data is set to TNOe + 1. This operation is indicated by TNO ← TNOe + 1. Also, the recording time (TIME) at that data (song) number at this time is set to zero. This is indicated by TIME ← 0. The total recording time (ATIM
E) is set by ATIMEe + 1.

This is indicated by ATIME ← ATIMEe + 1.

When additional recording is performed without changing the data (song) number (TNO), the preset data is set as follows.

TNO ← TNOe TIME ← TIMEe + 1 ATIME ← ATIMEe + 1 Further, the preset data when recording on a new disc 4 in which no data is recorded is set by TNO ← 1 TIME ← 0 ATIME ← 0.

Next, the preset data set in this way is sent to the time code generation control unit 45 of the time code generator 11 via the time code generator control unit 18 of the system controller 1.

Next, in step ′ of FIG. 10, the control unit 45 is
Then, it is determined whether or not the preset data is input, and if not input, branch N enters a waiting state. If it is input, the process proceeds to step 'in branch Y.

In step ′, the preset data (TNO, TIME, ATIME) input to the control unit 45 are stored in the register 4 respectively.
It is set to 6,47,48. Then proceed to step ′.

In step ', the control unit 45 determines whether or not the start command signal is input from the control unit 18 of the system controller 1. If it is not input, the process proceeds to step 'in branch N, and if it is input, the process proceeds to step' in branch Y.

In step ', it is judged whether or not the stop command signal from the system controller 1 is input. If not input, the process returns to step', and if it is input, the process returns to step '.

In step ', the control section 45 judges whether or not the sub-code synchronizing signal is input from the encoder 9 to the shift register 50.
It becomes a waiting state. If input, step Y at branch Y
Proceed to.

In step ', the preset data (TNO, TIME, ATIME) loaded into the shift register 50 from the sub-code sync signal is time code suitable for the time code recording format at the timing of the frame sync signal from the encoder 9. The data is output to the encoder 9. This time code data is recorded on the disc 4 together with new recording data additionally recorded immediately after the already recorded data, and is time code data continuous with the time code data of the already recorded data. Then, proceed to step '.

In step ', the control unit 45 determines whether or not an update command signal for updating the data (musical piece) number (TNO) is input from the system controller 1 to the control unit 45. If it is input, the process proceeds to step Y in branch Y, and if it is not input, the process proceeds to step 'in branch N.

In step ', the data in the registers 46 and 48 are fetched into the adder / subtractor 49, and TNO + 1 and ATIME + 1 are calculated, and new TNO and ATIME are added to the registers 46 and 48.
Is set to. Also at this time, TIME is set to zero,
This data is set in the register 47 by the control unit 45. This operation is indicated by TNO ← TNO TIME ← 0 ATIME ← ATIME + 1. Then proceed to step ′.

In step ', the arithmetic operation is performed by the adder / subtractor as in step', and new data of TIME and ATIME are set in the registers 47 and 48. At this time, the data content of TNO does not change. This operation is indicated as TIME ← TIME + 1 ATIME ← ATIME + 1.

In step ', the control unit 45 determines whether or not the stop command signal is input from the system controller 1 to the control unit 45. If it is not input, the process returns to step 'in branch N, and if it is input, the time code data output operation is ended in branch Y.

The adder / subtractor 49 also performs the subtraction operation of the time code data during the pause period.

As described above, in the disc recording / reproducing apparatus, when additionally recording new recording data immediately after the already recorded data,
Time code data conforming to the time code recording format which is the same format as the DAD can be created, and new recording data can be additionally recorded while maintaining the continuity of the time code.

Therefore, in the disc recording / reproducing apparatus capable of additional recording, the data can be recorded on one disc 4 in plural times, and the source side data can be edited at the time of recording. Further, since the time code data of the new recording data conforms to the time code recording format, when reproducing the recording data from the disc 4, the data access becomes easy.

By the way, after the new recording data is additionally recorded immediately after the already recorded data while maintaining the continuity of the time code data, the list of recorded data is created by the above-mentioned cataloging procedure, and the obtained catalog information is obtained. Is stored in the timetable shown in FIG. 5, this timetable can be updated. Further, after additionally recording all the data on the disc 4, the contents of the time table can be converted into a predetermined format and the catalog can be recorded in the catalog area on the disc 4.

As described above, in the disc recording / reproducing apparatus, since new data can be continuously and continuously recorded immediately after the already recorded data on the disc 4, it is possible to suppress the occurrence of an error at the time of reproducing the data and Data can be recorded on the recording medium 4 at a high density.

The disc 4 is not limited to the non-erasable write-once type optical disc, but may be another recordable optical disc.

H. Effects of the Invention As described above, in the disc recording / reproducing apparatus of the present invention, when additionally recording new recording data immediately after the already recorded data, the delay time until the reproduction decode signal is determined is corrected in the encoder. In this state, the encoder is synchronized with the reproduction synchronizing signal of the decoder, and the timing signal for changing from the reproduction to the recording operation is obtained from the encoder, and the new recording data can be additionally recorded without interruption immediately after the already recorded data.

Therefore, double recording or discontinuous recording as in the related art does not occur, an error does not occur in reproduced data, and data can be recorded on the disc at high density.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a disc recording / reproducing apparatus of the present invention,
FIG. 2 is a block diagram of a system controller of the disc recording / reproducing apparatus, FIG. 3 is a diagram showing a recording format of data recorded on the disc by the disc recording / reproducing apparatus, and FIG. 4 is a flowchart showing a procedure for making a catalog. , FIG. 5 is a diagram showing a time table in the system controller, FIG. 6 is a diagram showing types of catalogs recorded on the disc, FIG. 7 is a block diagram of an encoder of the disc recording / reproducing apparatus, and FIG. Is a time chart for additional recording by the disc recording / reproducing apparatus, FIG. 9 is a block diagram of the time code generator of the disc recording / reproducing apparatus, FIG. 10 is a flowchart showing the operation of the time code generator, and FIG. Is a time chart when additional recording is performed by the conventional disc recording / reproducing apparatus. 1 ... System controller 4 ... Write-once type optical disc 9 ... Encoder 10 ... Decoder 11 ... Time code generator 16 ... Encoder control unit 18 ... Time code generator control unit 21 ... Control calculation processing unit 22 ... … Time code reading unit 23 …… Catalog information storage unit 38 …… Synchronization signal generation unit 45 …… Time code generation control unit 46,47,48 …… Time code output register 49 …… Adder / subtractor 50 …… Parallel-to-serial conversion shift register

Claims (1)

[Claims] 1. An encoder converts input data into recording data of a predetermined recording format, adds a synchronization signal at the timing of an encoder synchronization signal and records the same on a disc, and the recorded data on the disc is read by an optical pickup. A disc recording / reproducing apparatus for converting the signal into a reproduction decoding signal by a decoder and outputting the signal, wherein the encoder additionally records new recording data on the disc immediately after the already recorded data. The encoder synchronization signal synchronized with the reproduction synchronization signal from the decoder is generated in a state in which the delay time until the reproduction decoding signal is fixed in the decoder with respect to the reading by the optical pickup is corrected, and the input data is recorded in a predetermined manner. Converted to recorded data in the format and converted from the encoder sync signal above. Performs an encoding operation of adding a sync signal at a timing and outputting the same, and generates and outputs a timing signal for switching from a reproducing state to a recording state in which a delay time required for the encoding operation is corrected with respect to the encoder synchronizing signal. A disk recording / reproducing device characterized by the above.