JP2765345B2 - Disk recording device and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording and reproducing apparatus for recording or reproducing digital information such as video and audio on an optical disk.

[0002]

2. Description of the Related Art Conventionally, a disk or tape has been used as a medium for recording video and audio.

As a disk for recording audio, for example,
A compact disc (CD) is well known as a read-only disc. Recently, write-once and rewritable optical disks have also been developed. On the other hand, a laser disk is well known as a disk on which video is recorded in an analog system. Hereinafter, a case where digital audio information is recorded on a conventional optical disc will be described as an example.
The signal rate of digital audio information is about 1.4 when the sampling frequency is 44.1 kHz and the quantization number is 16 bits.
1 megabit / second.

FIG. 15 is a diagram showing a track configuration of a conventional rewritable optical disk, and FIG. 16 is a diagram showing a configuration of a device for recording digital information on a conventional rewritable optical disk. In FIG. 15, reference numeral 1 denotes an optical disk having a spiral track 2 on which information is recorded, and the track 2 is equally divided to form a sector. Addresses are added to the sectors in ascending order from the inner periphery, and signals are recorded continuously from the inner periphery. Disk rotation control is performed by a constant linear velocity CLV (Constant Li
near Veocity).

The optical disk 1 configured as described above has
The operation of recording digital audio information will be described below.

First, in FIG. 16, 1 is an optical disk,
4 is an optical head, 5 is a spindle control means, 6 is a transfer means for transferring the optical head 4 from the inner circumference to the outer circumference of the optical disc 1,
Reference numeral 7 denotes a spindle, the rotation of which is controlled by the spindle control means 5 to rotate the optical disc 1. 11 is input digital audio information, 12 is recording means, 13 is a recording signal, 1
4 is a reproduction signal, 15 is reproduction means, 16 is output digital information, 17 is control means, 18 is a spindle control signal,
9 is a transfer control signal, and 20 is a tracking control signal. In FIG. 16, input digital information 11 is applied to a recording means 12 and added with parity for error correction.
Further, modulation for generating a mark pattern on the spiral track on the disk, for example, EFM modulation for converting 8 bits into 14 bits is performed, and a recording signal 13 is generated by adding a synchronization signal. The spindle control means 5 rotates the optical disc 1 at a substantially constant linear velocity. Optical head 1
Is a tracking control signal 2 given from the control means 17
On-track on track 2 by 0.

On the other hand, in the reproducing system, a reproduced signal 14 reproduced from the optical head 4 is inputted to a reproducing means 15, demodulated and error-corrected. Output digital information 16 is output from the reproducing means 15.

[0008]

However, in the above-mentioned conventional configuration, inconvenience occurs when digital audio or video information is recorded on an optical disk having discrete free areas. Here, the free area means an unrecorded area and a recorded area that are unnecessary and can be recorded. In the conventional example shown in FIG. 16, even when there are a plurality of discrete empty areas, the input digital signal is continuously recorded. Therefore, when the continuous empty area is exhausted, the already recorded information is overwritten by overwriting the recorded area. The problem of erasing occurs. There is also a problem that a plurality of discrete recorded areas cannot be reproduced.

The present invention solves the above-mentioned conventional problems. In recording digital information on an optical disk, the present invention utilizes the free space as much as possible without erasing the recorded area of the optical disk 1 as much as possible. This enables efficient recording. It is also possible to continuously reproduce digital information in a discrete recorded area on an optical disk.

[0010]

In order to achieve this object, a disk recording apparatus according to a first aspect of the present invention uses an optical head to write digital information on an optical disk having a sector obtained by dividing a spiral or concentric track. A recording device for recording, comprising: memory means for storing input digital information; write address generation means for generating a write address for the memory means; read address generation means for generating a read address for the memory means in accordance with a recording instruction; Recording means for recording digital information read from the memory means in accordance with the recording instruction on the optical disc; and free space address extracting means for extracting start addresses and end addresses of N (≧ 1) free areas from the optical disc. Extracts the recording address from the optical disc during recording. Address comparing means for outputting a comparison value when the recording address in the Kth (1 ≦ K ≦ N) free area is smaller than the end address of the Kth free area; When the difference is input, the difference between the write address and the read address is read, and if the value is equal to or greater than a predetermined threshold value, the recording command for reading and recording the upper digital information from the memory means is output, and the comparison value is output. Recording command generation means for outputting a recording command for stopping recording when the optical head is not input, transferring the optical head to another empty area and performing a track jump, a transfer means for transferring the optical head according to the recording command, and the recording command A track on which the optical head is made to track on the track according to It is obtained by a control means.

The disk recording apparatus according to the second invention of the present application further comprises a K-th free area and a K +
A continuation pointer generating means for generating a K-th continuation pointer for instructing continuation with the first free area; an information area divided into a predetermined size, an area number of the information area, and a start address of the information area; Recording means for recording the K-th continuation pointer in association with the K-th area number and the K-th start address in the TOC area on the optical disc having a TOC area for recording, together with the input digital information. Things.

A disk recording apparatus according to a third aspect of the present invention is a recording apparatus for recording digital information on an optical disk having a sector obtained by dividing a spiral or concentric track using an optical head. Memory means for storing, write address generation means for generating a write address of the memory means, read address generation means for generating a read address of the memory means according to a recording instruction, and digital data read from the memory means according to the recording instruction Recording means for recording information on the optical disc; free area address extracting means for extracting start addresses and end addresses of N (≧ 1) free areas from the optical disc; and recording for extracting a recording address from the optical disc during recording Address extraction means and K-th Address comparison means for outputting a comparison value when the recording address in the free area of 1 ≦ K ≦ N) is smaller than the end address of the Kth free area; recording timing of the recording means; and read address of the memory means. Reference clock generating means for generating a reference clock for determining the timing of the clock, clock varying means for varying the rotation frequency of the optical disc and the reference clock according to the recording command, and the recording command when the comparison value is input. Recording command generating means for outputting, outputting the recording command for stopping the recording when the comparison value is not input, transferring the optical head to another empty area and performing track jump to turn on the track, and changing the reference clock. Transfer means for transferring the optical head in accordance with the recording command, and An optical head is obtained a tracking control means for a track jump the optical head causes on-track to the track.

A disk reproducing apparatus according to a fourth aspect of the present invention is a reproducing apparatus for reproducing digital information from an optical disk having a sector obtained by dividing a spiral or concentric track using an optical head. Reproducing means for reproducing information, memory means for storing the digital information, write address generating means for generating a write address of the memory means in accordance with the reproduction command, and read address generating means for generating a read address of the memory means Recorded area address extraction means for extracting start addresses and end addresses of N (≧ 1) recorded areas from the optical disc; reproduction address extraction means for extracting a reproduction address from the optical disc during reproduction; (1 ≦ K ≦ N) in the recorded area Address comparison means for outputting a comparison value when the raw address is smaller than the end address of the K-th recorded area; and reading the difference between the write address and the read address when the comparison value is inputted, and reading the value. Output the reproduction command to write the digital information to the memory means if the threshold value is not more than
Playback command generation means for stopping the writing of digital information to the memory means when the comparison value is not input, outputting the playback command for moving the optical head to another recorded area and performing track jump, and the playback command And a tracking control means for making the optical head on-track on the track in accordance with the reproduction command and for causing the optical head to jump.

According to a fifth aspect of the present invention, in addition to the fourth aspect of the present invention, in addition to the fourth aspect of the present invention, an information area divided into a predetermined size for recording input digital information and an area number of the information area And a K + 1-th recorded area recorded in association with the K-th area number and the K-th start address from the TOC area on the optical disc having the TOC area in which the start address of the information area is recorded. It is provided with a continuation pointer extracting means for reading out the designated Kth continuation pointer.

A disk reproducing apparatus according to a sixth aspect of the present invention, in addition to the fifth aspect, reproduces digital information from an optical disk having a sector obtained by dividing a spiral or concentric track using an optical head. An apparatus, comprising: reproducing means for reproducing digital information from the optical disc; memory means for storing the digital information; write address generating means for generating a write address of the memory means in accordance with a reproduction command; and reading from the memory means Read address generating means for generating an address; recorded area address extracting means for extracting start addresses and end addresses of N (≧ 1) recorded areas from the optical disc; and extracting a reproduction address from the optical disc during reproduction. A reproduction address extracting means, and a K-th (1 ≦ K ≦ N) Address comparing means for outputting a comparison value when the reproduction address in the recorded area is smaller than the end address of the K-th recorded area; and a reference clock generating means for generating a reference clock for determining a write address timing of the memory means. Means, a clock varying means for varying the rotation frequency of the optical disc and the reference clock according to the reproduction command, and outputting the reproduction command when the comparison value is inputted, and outputting to the memory means when the comparison value is not inputted. Reproduction command generation means for stopping the writing of the digital information, moving the optical head to another recorded area and performing track jump to turn on the track, and outputting the reproduction command for changing the reference clock; and Transfer means for transferring the optical head in accordance with An optical head is obtained a tracking control means for a track jump the optical head causes on-track to the track in accordance with decree.

[0016]

According to the disk recording apparatus of the first aspect of the present invention, the recording address in the K-th (1 ≦ K ≦ N) empty area is smaller than the end address of the K-th empty area during recording. When the comparison value is output, the difference between the write address and the read address is read when the comparison value is input, and when the value is equal to or greater than a predetermined threshold value, the digital information is read from the memory means in accordance with a recording command. Read and record on the optical disc. When the comparison value is not input, the recording is stopped in accordance with the recording command, and the optical head can be moved to another empty area and track jump can be performed.

According to the disk recording apparatus of the second invention of the present application, in addition to the operation of the first invention of the present application, the K-th free area and K + 1
A K-th continuation pointer indicating continuation with the vacant area is generated, and the K-th continuation pointer is associated with the K-th area number and the K-th start address in the TOC area together with the input digital information. Can be recorded.

In the disk recording apparatus according to the third aspect of the present invention, the recording address in the K-th (1 ≦ K ≦ N) empty area is smaller than the end address of the K-th empty area during recording. When the comparison value is output, when the comparison value is input, the first reference clock is generated and recorded. When the comparison value is not input, the recording is stopped, and the optical head is moved to another empty area. The reference clock can be changed while the track jump is performed to perform on-track.

According to the disk reproducing apparatus of the fourth aspect of the present invention, the reproducing address in the K-th (1 ≦ K ≦ N) recorded area is equal to the end of the K-th recorded area during reproduction. When the address is smaller than the address, the comparison value is output.
When the comparison value is input, a difference between the write address and the read address is read, and if the difference is equal to or less than a predetermined threshold value, the digital information is written to the memory means. Further, when the comparison value is not input, the writing of digital information to the memory means can be stopped, and the optical head can be moved to another recorded area and a track jump can be performed.

According to the fifth aspect of the present invention, in addition to the fourth operation of the present invention, the disk reproducing apparatus of the fifth aspect of the present invention has the TO
From the C area, the K-th continuation pointer indicating the continuation of the K + 1-th recorded area recorded in association with the K-th area number and the K-th start address can be read.

According to the disk reproducing apparatus of the sixth aspect of the present invention, the reproducing address in the K-th (1.ltoreq.K.ltoreq.N) recorded area is equal to the end of the K-th recorded area. When the address is smaller than the address, the comparison value is output.
When the comparison value is input, a first reference clock is generated and reproduced. When the comparison value is not input, the writing of digital information to the memory means is stopped and the optical head is moved to another recorded area. It can be made on-track by transport and track jump.

[0022]

An embodiment of the present invention will be described below with reference to the drawings. The first embodiment of the present invention is for recording digital audio information. The optical disc 1
This is the same configuration as FIG. The addresses of the sectors used for recording are added in ascending order from the inner circumference, and the recording is performed in accordance with the addresses of the sectors.

FIG. 1 is a diagram showing a configuration of a disk recording apparatus according to a first embodiment of the present invention, FIG. 2 is a diagram showing a configuration of a track of an optical disk, and FIG. 3 is a recording timing in the first embodiment of the present invention. FIG. In FIG.
1, 4 to 7, 11, and 18 are the same as the conventional example shown in FIG. 101 is a memory means, 102 is a memory means 101
103 output from the memory means 1
01 is a write address generating means for generating a write address 104 of the memory means 101, and 105 is a read address generating means for generating a read address 106 of the memory means 101.
07 is a recording means, 108 is a recording signal, 109 is a recording timing and digital information 102 from the memory means 101.
Clock 11 of read address 106 for reading
0 is a reference clock generating means, 110 is a reference clock, 111 is a tracking control means, 112 is a tracking signal, 113 is a recording command generating means, 114 is a recording command, 115 is a reproduction signal, and 116 is an empty area from the reproduction signal 115 A free area address extracting means 117 for extracting a start address and an end address, a free address address information 117, a recording address extracting means 121 for extracting, from the reproduction signal 115, recording address information 120 serving as a reference for position control at the time of recording, 121 Compares the free area address information 117 with the address 120 at the time of recording, and
Address comparison means for outputting a comparison value 122 when 20 is smaller than the end address of the empty area being recorded, 123 is a transfer means for moving the optical head 4 from the inner circumference to the outer circumference of the optical disk 1, and 124 is a transfer control signal. The signal rate of the digital information in the recording signal 108 is higher than the signal rate of the input digital information 11.

FIG. 2 shows a state of recording on the free areas 131 and 132 when the optical disk 1 has two free areas (the free areas 131 and 132 in FIG. 2). Further, the start address and the end address of the free area 131 are respectively set to 13
3, 134, and the start address and end address of the empty area 132 are 135, 136, respectively. Reference numeral 137 denotes the locus of the transfer of the optical head 4 from the free area 131 to the free area 132 and the track jump after the recording of the free area 131 is completed.

FIG. 3 shows a change in the amount of data in the memory means 101. FIG. 3 shows how the input digital information 11, the recording command 114, the comparison value 122, the recording signal 108, and the data amount of the memory means 101 change with time. In FIG. 3, 151 is a predetermined number (≧
The recording unit in which the sectors of 1) are collected is called a cluster, and it is assumed that addresses are added to each cluster in the order of ascending from the inner circumference similarly to the sector. In FIG. 3, the addresses of each cluster are D0, D1, D2,. Also,
The recording command 114 is “1” for recording, and “0” for recording stop. The comparison value 122 indicates that the recording address information 120 is at least a predetermined amount from the end address of the empty area being recorded, ie, one cluster in this embodiment. Only when it ’s small ”
1 is set to “0” otherwise, 152 is a first threshold indicating recording start, 153 is a second threshold indicating recording stop, and 154 starts recording in the free space 132. This is the amount of data in the memory means 101 when performing the operation.

The operation of the disk recording apparatus of the present embodiment configured as described above will be described below with reference to FIGS. In FIG. 1, first, the free area addresses 131 and 132 are extracted by the free area address extracting means 116.
The respective start address and end address are extracted from the optical disc 1 and stored. The input digital information 11 is written to the memory means 101 by the write address 104 generated by the write address generation means 103 according to the signal rate of the input digital information 11, and is read by the read address 106 generated by the read address generation means 105. The digital information 102 output from the memory means 101 is input to the recording means 107. The recording means 107 adds parity for error correction to the digital information 102 and further modulates the sector on the optical disc 1 to generate a mark pattern, for example, E.
FM modulation is performed, a synchronization signal is added, and the reference clock 11
0, the recording signal 108 is output and the optical head 4
Drive. The transfer means 123 transfers the optical head 4 from the inner circumference to the outer circumference of the optical disc 1, and the tracking control means 1
Numeral 11 causes the optical head 4 to be on-track on the track 2 of the optical disk 1 and to cause a track jump. The spindle control means 5 rotates the optical disc 1 at a constant linear velocity. Write address 104 and read address 10
6 is input to the recording command generating means 113. The recording command generation means 113 calculates the difference between the write address 104 and the read address 106, compares the difference signal with a predetermined threshold value, and reads out the recording command 114 generated based on the output and the comparison value 122. Address generation means 105,
Output to the tracking control unit 111, the transfer unit 123, and the recording unit 107. Read speed and recording means 10 for reading digital information 102 from memory means 101
7 is determined based on the reference clock 110. That is, the digital information 102 is read out at the timing of the reference clock 110 and is recorded on the optical disc 1. The input digital information 11 is written to the memory means 101 by a write address 104 generated according to the signal rate of the input digital information 11, and is read by a read address 106. At this time, since the signal rate of the digital information in the recording signal 108 is higher than the signal rate of the input digital information 11, the reading speed of the digital information 102 from the memory means 101 is higher than the writing speed.

First, the recording operation of the free area 131 will be described in the case where the remaining recording data amount of the free area 131 is sufficient. That is, the recording address information 120 is sufficiently smaller than the end address 134 of the empty area 131, and the comparison value 122 is "1". At this time, the write address 1
3, the recording command 114 becomes "1" when the difference is equal to or greater than the first threshold value 152 as shown in FIG. The operation of 105 is started, the digital information 102 is read from the memory means 101, and the recording signal 107 is output from the recording means 107.
As a result, the data capacity in the memory means 101 decreases by the difference between the writing speed and the reading speed. On the other hand, a difference between the write address 104 and the read address 106 is obtained, and when the difference is equal to or less than the second threshold 153,
The recording command becomes “0”, the recording command 114 stops the operation of the read address generation unit 105, stops reading the digital information 102 from the memory unit 101, and stops supplying the recording signal 108 from the recording unit 107. . As a result, the data capacity in the memory means 101 increases at the signal rate of the input digital information 11. At the same time, a recording command 114 is sent to the tracking control means 111 to cause the optical head 4 to jump one track forward. During the rotation of the disk after the track jump, the data capacity in the memory means 101 recovers, and when the data capacity exceeds the first threshold value 152, the recording operation is started.
As described above, the recording operation is performed so as to form a continuous recording pattern on the track by using the track jump.

Next, a description will be given of a recording operation of the free area 131 when the remaining recording data amount of the free area 131 decreases. That is, the difference between the recording address information 120 and the end address 134 of the free area 131 is smaller than one cluster, and the comparison value 122 is “0”. As a result, the recording command 114 becomes “0”, the operation of the read address generation unit 105 is stopped by the recording command 114, the reading of the digital information 102 from the memory unit 101 is stopped, and the recording signal 108 from the recording unit 107.
Supply of water is stopped. As a result, the amount of data in the memory means 101 increases at the signal rate of the input digital information 11. At the same time, the recording command 114 is sent to the transfer means 123 and the tracking control means 111, and the optical head 4 is transferred to the start address 135 of the free space 132 to be on-track. After the on-track, the comparison value 122 becomes “
After that, the difference between the write address 104 and the read address 106 is obtained. If the difference is equal to or larger than the first threshold value 152, the recording command 114 is set to "1". The operation of the address generation unit 105 is started, the digital information 102 is read from the memory unit 101, the recording signal 107 is output from the recording unit 107, and the clusters D5 to D10 are continuously recorded on the optical disc 1. , Free space 13
This is similar to the case where the remaining recording data amount of 1 is sufficient.

As described above, according to the first embodiment of the present invention, when there is an empty area on the optical disk 1, the input digital information 11 is continuously converted without dropping the input digital information over a plurality of empty areas. It is possible to record it.

Although the first embodiment of the present invention has been described in connection with the case where there are two empty areas, the same applies to the case where there are three or more empty areas.

FIG. 4 shows a second embodiment of the present invention. The second embodiment of the present invention includes, in addition to the first embodiment of the present invention,
This is a case where continuation information of a free area or a recorded area is recorded in the TOC.

FIG. 4 is a diagram showing a configuration of a disk recording apparatus according to a second embodiment of the present invention, and FIG. 5 is a diagram showing a flowchart of a continuation pointer generating means.

In FIG. 4, reference numerals 1, 4 to 7, 11, and 18 are the same as those in the conventional example shown in FIG. The track configuration on the disk is the same as in the first embodiment shown in FIG. Also,
101 to 106, 108 to 117, and 119 to 124 are the same as those in the first embodiment shown in FIG. 201 is a recorded area extracting means for extracting the area number, start address, end address and the like of the recorded area from the reproduction signal 115;
Reference numeral 202 denotes recorded area information; 203, continuation pointer generation means; 204, continuation pointer information; 205, recording means for recording the continuation pointer information 204 as a part of the TOC information together with the digital information 102 on the optical disc 1. The second embodiment basically operates in the same manner as the first embodiment, but manages the recorded area and the free area by the TOC.
And the continuation state of each recorded area and free area is recorded in the TOC. That is,
In FIG. 4, the continuation pointer generating means 203 is based on the free area address information 117, the recording address information 120, the recorded area information 202, and the recording instruction 114, and the recorded area management table shown in (Table 1) and (Table 3). , (Table 2),
The free space management tables shown in (Table 4) to (Table 5) are created and updated and recorded by the recording unit 205.

The operation of the disk recording apparatus of the second embodiment configured as described above will be described below with reference to FIGS. 4 to 5 and Tables 1 to 5. First, a recorded area management table and a free area management table before recording will be described.

Table 1 records the area number, start address, and end address of the recorded area, and Table 2 records the area number, start address, and end address of the empty area.

[0036]

[Table 1]

[0037]

[Table 2]

FIG. 5 is an example of a flow chart of the second embodiment, where K = 131. Step 1 in FIG.
Reads the area number, start address, and end address of the recorded area, and reads the area number, start address, and end address of the free area in step 2. In this state, the input digital information 11 is added and recorded in the free space 131. In the second embodiment, the input digital information has an information amount of 2,000 in terms of address conversion, and the free space 131 and free space shown in (Table 2). If it is to be recorded in the area 132,
Recording can be performed by the same operation as in the first embodiment. In step 3 of FIG. 5, when the recording address in the free area 131 is equal to the end address (2000) -1 cluster of the free area 131, the process proceeds to step 4; In step 4, the continuation information is added to record the data in the free space 132 following the free space 131. That is, the free area 131 is registered as the recorded area 131, and the offset address 10 of the TOC address 110 continuously recorded in the recorded area 131 is added. In step 5, if the recording is not completed, the process proceeds to step 3 again. Table 3 shows the recorded area management table created as described above. (Table 3)
To the TOC address 100, in addition to the area number 131, the start address 1001, and the end address 2000, the TOC offset address 10 in which the recorded area 132 is recorded as a continuation pointer is added.
Continue to the recorded area 132. Further, the free space management table shown in (Table 1) is updated to be as shown in (Table 4). That is, the empty area 131 has been deleted.
The continuation pointer may record not only the TOC offset address shown in (Table 3) but also the TOC address of the recorded area 132 and the start address of the recorded area 132.

[0039]

[Table 3]

[0040]

[Table 4]

In the free space management table, the remaining space (start address 5001, end address 6000) of the free space 132 and the free space 133 are shown in (Table 5) so that the free space 133 can be used continuously. Thus, the TOC offset address of the free space 133 may be recorded as a continuous pointer in the free space. The continuation pointer is (Table 5)
Not only the TOC offset address shown in
133 and the start address of the empty area 133 may be recorded.

[0042]

[Table 5]

As described above, according to the second embodiment of the present invention, when there is an empty area on the optical disk, the input digital information is continuously recorded over the two empty areas and the TOC is recorded. In this case, it is possible to record the continuation information of the recorded area that has been dispersedly recorded.

FIGS. 6 and 7 show a third embodiment of the present invention. The third embodiment of the present invention is different from the first and second embodiments of the present invention in that the signal rate of the digital information in the recording signal 108 is the same as the signal rate of the input digital information 11.

FIG. 6 is a diagram showing the configuration of a recording apparatus according to the third embodiment of the present invention, and FIG. 7 is a diagram showing recording timing in the third embodiment of the present invention. In FIG.
Reference numerals 1, 4 to 7, and 11 are the same as those in the conventional example shown in FIG.
Further, 101 to 117 and 119 to 124 are the same as those of the first embodiment shown in FIG. 301 is a clock variable unit,
302 is a reference clock variable signal, and 303 is a variable rotation control signal.

The operation of the disk recording apparatus of the third embodiment configured as described above will be described below with reference to FIGS. In FIG. 6, first, the empty area 131,
132, the start address and the end address are read from the optical disk and stored.

First, the recording operation of the free area 131 will be described in the case where the remaining area of the free area 131 is sufficient. That is, in the normal speed recording section in FIG. 7, the recording address information 120 is sufficiently smaller than the end address 134 of the empty area 131, the comparison value 122 is "1",
The recording command 114 becomes "1", the data amount of the memory means 101 is a constant value 331, and the clusters D0 to D4 are continuously recorded. Next, the recording operation of the free area 131 when the remaining area of the free area 131 is decreasing will be described. That is, the difference between the recording address information 120 and the end address of the free area 131 is one cluster or less, and the comparison value 122 is “0”. As a result, the recording command 114 becomes “0”, the operation of the read address generation unit 105 is stopped by the recording command 114, the reading of the digital information 102 from the memory unit 101 is stopped, and the recording signal 108 from the recording unit 107 is Stop supply. At the same time, in the clock change section 1 of FIG. 7, the clock variable unit 301 supplies the reference clock variable signal 302 to the reference clock generation unit 109 to double the reference clock, and sends the variable rotation control signal 303 to the spindle control unit 5. The rotation frequency of the supplied spindle motor is doubled. At the same time, the recording command 114 is sent to the transfer means 123 and the tracking control means 111, and the optical head 4 is transferred to the start address 135 of the free space 132 to be on-track. At this time, the data amount of the memory means 101 increases to the value indicated by 333 in FIG. Thereafter, the comparison value 122 becomes "1", and recording is started in the double speed recording section of FIG. 6, and clusters D5 to D11 are recorded. Thereafter, the difference between the write address 104 and the read address 106 is obtained. If the difference is equal to or smaller than the threshold value 332, the recording command 114 becomes “0”, the operation of the read address generation unit 105 is stopped, and the memory unit 1
Stop reading digital information 102 from 01,
The supply of the recording signal 108 from the recording unit 107 is stopped. At the same time, in the clock change section 2 of FIG.
02 is supplied to the clock generation means 109 to restore the reference clock 110, and a variable rotation control signal 303 is supplied to the spindle control means 5 to restore the rotation frequency.
After the reference clock 110 and the rotation frequency are sufficiently stabilized,
The recording command 114 is set to "1" and recording is started again. The subsequent operation is as described at the beginning of the third embodiment.

In the third embodiment of the present invention, the change of the reference clock is doubled.
It may be double.

As described above, according to the third embodiment of the present invention, when there is an empty area on the optical disk and the signal rate of the digital information in the recording signal is the same as the signal rate of the input digital information, Digital information can be recorded continuously over two empty areas.

FIGS. 8 to 10 show a fourth embodiment of the present invention. The fourth embodiment of the present invention relates to a case where a dispersed recorded area on an optical disc is continuously reproduced. It is assumed that the configuration of the optical disc 1 is the same as that of FIG. 15, and that addresses are added to the respective sectors in order of ascending from the inner circumference.

FIG. 8 is a diagram showing a configuration of a disk reproducing apparatus according to a fourth embodiment of the present invention, FIG. 9 is a diagram showing a configuration of a track of a disk, and FIG. 10 is a reproduction timing in the fourth embodiment of the present invention. FIG. In FIG.
1, 4 to 7, 18 are the same as the conventional example shown in FIG.
Also, 101, 103 to 106, 109 to 112, 12
1 to 124 are the same as those in the first embodiment shown in FIG. 4
01 is a reproduction signal from the optical head, 402 is reproduction means, 4
03 is reproduction digital information output from the reproduction means 402, 404 is output digital information output from the memory means 101, and 405 is a reproduction signal 401 from the reproduction signal 401.
2, a recorded area address extracting means for extracting an address of a recorded area via the second address 406, recorded area address information, 408 a reproduction address for extracting an address being reproduced from the reproduction signal 401 via the reproduction means 402. Extraction means, 409 is reproduction address information, 411 is reproduction instruction generation means, and 412 is reproduction instruction.

The operation of the disk reproducing apparatus of the present embodiment configured as described above will be described below with reference to FIGS. In this case, the signal rate of the digital information in the reproduction signal 401 is the output digital information 4
It is assumed that the signal rate is higher than the signal rate of No. 04. In FIG.
The reproduced signal 401 is input to the reproducing means 402, demodulated and error-corrected, and output as reproduced digital information 403. The reproduced digital information 403 is stored in the memory 10.
1 is written by the write address 104, and is read by the read address 106 generated according to the signal rate of the output digital information 404. The write address 104 and the read address 106 are input to the reproduction command generator 411. The reproduction command generation means 411 calculates the difference between the write address 104 and the read address 106, compares the difference signal with a predetermined threshold value, and uses the output as a reproduction command 412 as the write address generation means 103 and the tracking control means 111. , Reproduction means 40
2. Output to the transfer means 123. The writing speed of the reproduction digital information 403 to the memory means 101 is determined based on the reference clock 110.

FIG. 9 shows a state of reproduction from the recorded areas 451 and 452 when the optical disc 1 has two recorded areas (recorded areas 451 and 452 in FIG. 8). The start address and end address of the recorded area 451 are 453 and 454, respectively, and the start address and end address of the recorded area 452 are 455 and 456, respectively. Reference numeral 457 indicates the locus of the movement of the optical head 4 from the recorded area 451 to the recorded area 452 and the track jump after reproducing the recorded area 451.

FIG. 10 shows a change in the amount of data in the memory means 101. FIG. 10 shows the reproduction digital information 40.
3, the reproduction command 412, the comparison value 122, the output digital information 404, and how the data amount of the memory means 101 changes with time. In FIG.
432 is a third threshold value indicating the start of reproduction, and 431 is a fourth threshold value indicating the stop of reproduction. The reproduced digital information 403 is written into the memory means 101 by the write address 104 generated according to the reference clock 110, and is read by the read address 106 generated at the timing of the output digital information 404. During playback, the rate of digital information in the playback signal 401 is greater than the signal rate of the output digital information 404,
Since the writing speed of the digital information to the memory means 101 is higher than the reading speed, the data capacity in the memory means 101 increases by the difference between the writing speed and the reading speed. When the reproduction address information 409 is smaller than the end address 454 of the recorded area by, for example, one cluster or more, the comparison value 122 is “1”, and otherwise, it is “0”.

The operation of the disk reproducing apparatus of the present embodiment configured as described above will be described below with reference to FIGS. In FIG. 8, first, a recorded area 451,
The start address and the end address of each 452 are read from the optical disc 1 and stored.

First, a reproducing operation in a case where there is enough recorded area 451 will be described. That is, the reproduction address information 409 is the end address 45 of the recorded area 451.
4, the comparison value 122 is “1”. At this time, the write address 104 and the read address 10
6 when the difference is equal to or less than the third threshold value 432, the reproduction command 412 becomes "1", the operation of the write address generation means 103 is started, and the digital information 403 is sent to the memory means 101. Write. as a result,
The data capacity in the memory means 101 increases by the difference between the writing speed and the reading speed. On the other hand, write address 1
04 and the read address 106, and when the difference is equal to or greater than the fourth threshold value 431, the reproduction command is "
0 ", the reproduction command 412 stops the operation of the write address generation means 103, and the writing of the digital information 403 to the memory means 101 is stopped.
11 to cause the optical head 4 to jump one track forward. During the rotation of the disk after the track jump, the data capacity in the memory means 101 decreases, and when the data capacity falls below the third threshold value 432, the reproducing operation is started. As described above, the continuous reproduction operation is performed using the track jump.

Next, the operation of reproducing the recorded area 451 when the remaining area of the recorded area 451 decreases will be described. That is, the difference between the reproduction address information 409 and the end address 456 of the recorded area 451 becomes one cluster or less, and the comparison value 122 becomes “0”. At this time, the reproduction command 412 becomes “0”, and the operation of the write address generation unit 105 is stopped by the reproduction command 412, and the writing of the digital information 403 to the memory unit 101 is stopped. As a result, the data capacity in the memory means 101 decreases at the signal rate of the output digital information 404. At the same time, a reproduction command 412 is sent to the transfer means 123 and the tracking control means 111 to transfer the optical head 4 to the start address 455 of the recorded area 452 to perform on-track. As a result, the comparison value 122 becomes “
After that, the reproduction command 412 becomes “1”,
Write address generation means 103 according to reproduction command 412
Is started, the clusters D5 to D10 are successively reproduced from the optical disk 1 and written into the memory means 101. Subsequent operations are the same as in the case of the recorded area 451.

As described above, according to the fourth embodiment of the present invention, when there is a recorded area on the optical disc, the reproduced digital information can be recorded continuously over two recorded areas. It is possible.

FIG. 11 shows a fifth embodiment of the present invention. The fifth embodiment of the present invention is different from the fourth embodiment of the present invention in that
This is a case where continuation pointers of a plurality of recorded areas are recorded in the TOC.

FIG. 11 is a diagram showing a configuration of a disk reproducing apparatus according to the fifth embodiment of the present invention.

In FIG. 11, reference numerals 1, 4 to 7, 18 denote FIG.
6 is the same as the conventional example shown in FIG. Also, 101, 103 ~
106, 109 to 112 and 121 to 124 are the same as those of the first embodiment shown in FIG.
Reference numerals 408 to 409 and 412 are the same as those of the fourth embodiment shown in FIG. Reference numeral 500 denotes a reproducing unit for reproducing digital information and extracting a continuation pointer together with TOC information; 501, a continuation pointer extracting unit; and 502, continuation pointer information. The reproduction command generation means 511 basically operates in the same manner as the reproduction command generation means 411 shown in the fourth embodiment, but additionally reproduces another recorded area continuously based on the continuation pointer 502. To generate a playback command. The fifth embodiment operates basically the same as the fourth embodiment, except that the management of the recorded area is performed by the TOC and the continuation state of each recorded area is recorded in the TOC. Are different.

The operation of the disk reproducing apparatus of the fifth embodiment configured as described above will be described below with reference to FIG. 11 and (Table 6).

[0063]

[Table 6]

In Table 6, TOC address 200
Recorded area of the region number 451, which is recorded in the start address 10001, and has a termination address 11000 to. In this state, the area number 451 and the area number 4
52 indicates that the operation is continued by the offset address 10 provided as a continuation pointer. here
Then, the reproduction command means 511 connects to the TOC address 200.
Recorded TOC address 210 with additional pointer 10
The start address 15001 of the read area 452
After playing the area number 451,
And the area number 452 can be reproduced. Subsequent operations are the same as in the fourth embodiment of the present invention.

As described above, according to the fifth embodiment of the present invention, when the recorded areas are dispersed on the optical disc, the reproduction is continuously performed over the plurality of recorded areas, and the TOC is recorded. It is possible to reproduce based on the connection information of the recorded areas recorded in a distributed manner.

FIGS. 12 and 13 show a sixth embodiment of the present invention. The sixth embodiment of the present invention is different from the fourth and fifth embodiments in that the signal rate of the digital information in the reproduction signal 401 is the same as the signal rate of the output digital information 404.

FIG. 12 is a diagram showing the structure of a disk reproducing apparatus according to the sixth embodiment of the present invention, and FIG.
FIG. 8 is a diagram showing reproduction timing in the example of FIG. FIG.
, 1, 4-7 are the same as the conventional example shown in FIG. Also, 101, 103 to 106, 109 to 112,
Reference numerals 121 to 124 are the same as those in the first embodiment shown in FIG. 1, and reference numerals 301 to 303 are the same as those in the third embodiment shown in FIG. 6, and reference numerals 401 to 406, 408 to 409, 411, 41
2 is the same as the fourth embodiment shown in FIG. The track configuration of the optical disc 1 is the same as that of the fourth embodiment shown in FIG.

With reference to FIGS. 12 and 13, the operation of the disk reproducing apparatus of the present embodiment configured as described above will be described below. In FIG. 12, first, the start address and the end address of each of the recorded areas 451 and 452 are read from the optical disc 1 and stored by the recorded area address extracting means 405.

First, the recording operation of the recorded area 451 when the remaining area of the recorded area 451 is sufficient will be described. That is, in the normal speed recording section of FIG. 13, the reproduction address 409 is sufficiently smaller than the end address 454 of the recorded area 451, the comparison value 122 is "1", the reproduction command 412 is "1", and the memory means 10
1 has a constant value 631 and the clusters D0 to D
4 are continuously played. Next, a case where the area of the recorded area 451 is reduced will be described.
Will be described. That is, the reproduction address 409
The difference between the end address 454 of the recorded area 451 is 1
When the number is equal to or smaller than the cluster, the comparison value 122 becomes “0”. At this time, the reproduction command 412 becomes “0”, the operation of the write address generation unit 103 is stopped, and the writing of the digital information 403 to the memory unit 101 is stopped. At the same time, in the clock change section 1 of FIG.
02 is supplied to the reference clock generation means 109 to double the reference clock, and a variable rotation control signal 303 is supplied to the spindle control means 5 to double the rotation frequency. At the same time, the reproduction command 114 is sent to the transfer means 123 and the tracking control means 111, and the optical head 4 is moved to the start address 455 of the recorded area 452 to be on-track. At this time, the data amount of the memory means 101 is as shown in FIG.
633. Then, the comparison value 122
Becomes "1", the reproduction is started in the double speed reproduction section of FIG. 13, and the clusters D5 to D11 are reproduced. afterwards,
The difference between the write address 104 and the read address 106 is obtained, and if the difference is equal to or larger than the threshold value 632, the comparison value 122 becomes “0”. At this time, the reproduction command is “0”
Then, the operation of the write address generation unit 103 is stopped by the reproduction command 412, and the writing of the digital information 403 to the memory unit 101 is stopped. At the same time, in the clock change section 2 of FIG. 13, the clock variable means 301 supplies the reference clock variable signal 302 to the reference clock generation means 109 to restore the reference clock, and sends the variable rotation control signal 303 to the spindle control means 5.
To restore the rotation frequency. Reference clock 11
0 and after the rotation frequency is sufficiently stabilized,
Is set to "1" and the reproduction is started again. Subsequent operations are as described in the fourth embodiment of the present invention.

In the sixth embodiment of the present invention, the change of the reference clock is doubled.
It may be double.

As described above, according to the sixth embodiment of the present invention, when there is a recorded area on the optical disk and the signal rate of the digital information in the reproduced signal is the same as the signal rate of the output digital information, It is possible to record continuously over a plurality of recorded areas.

Although the first to third embodiments of the present invention have been described by taking light modulation as an example, the same holds when recording is performed using the magneto-optical effect. In this case,
At the time of recording, the difference is that the recording signal is applied not to the optical head 4 but to the magnetic head 701 as shown in FIG. FIG.
In the figure, 701 is a magnetic head, 702 is a magnetic head driving means, and 703 is a magnetic head driving signal. The recording signal 108 is applied not to the optical head 4 but to the magnetic head 701. The tracking control unit 111 makes the magnetic head 701 on track 2 together with the optical head 4 and performs a track jump. Others are the same as the first to third embodiments of the present invention. On the other hand, during playback, the optical disk 1
The read signal is read from the optical head 4 by utilizing the magneto-optical effect. Subsequent operations are performed according to the fourth to sixth aspects of the present invention.
This is the same as the embodiment.

Further, in the first to sixth embodiments of the present invention, the case where addresses are added in ascending order from the inner periphery and are recorded from the inner periphery has been described. The same is true for In this case, except that the relationship between the address difference between the write address 104 and the read address 106 of the memory means 101 and the threshold value is reversed, the rest is the same as the present invention.

Further, the disc reproducing apparatus shown in the fourth to sixth embodiments of the present invention can be similarly applied to an optical disc storing digital information in a pit format.

In the first to sixth embodiments of the present invention, the case where digital audio information is recorded / reproduced has been described. It goes without saying that the same applies to the case where digital video information is recorded / reproduced. Absent.

[0076]

As is apparent from the above embodiment, according to the first embodiment of the present invention, when there is an empty area on the optical disk, the signal rate of the digital information in the recording signal is changed to the input digital information. When the signal rate is larger than the signal rate, the input digital information can be recorded continuously over a plurality of empty areas.

Further, according to the second embodiment of the present invention, when there is a free area on the optical disk, the input digital information is recorded continuously over a plurality of free areas, and the input digital information is distributed to the TOC. It is possible to record the connection information of the recorded area recorded as a continuation pointer.

Further, according to the third embodiment of the present invention, when there is an empty area on the optical disk and the signal rate of the digital information in the recording signal is the same as the signal rate of the input digital information, the input digital information is , Can be continuously recorded over a plurality of empty areas.

Further, according to the fourth embodiment of the present invention, when there is a recorded area on the optical disk, if the signal rate of the digital information in the reproduction signal is higher than the signal rate of the output digital information, the reproduction is performed. Digital information can be reproduced continuously over a plurality of recorded areas.

According to the fifth embodiment of the present invention, when the recorded areas are dispersed on the optical disk, the reproduction is continuously performed over a plurality of recorded areas, and the dispersed areas are dispersed in the TOC. It is possible to play back based on the area pointer of the recorded area recorded in advance.

According to the sixth embodiment of the present invention, when there is a recorded area on the optical disk and the signal rate of the digital information in the reproduced signal is the same as the signal rate of the output digital information, two locations are used. It is possible to play back continuously over the recorded area.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a disk recording device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of a track of the disk in the first embodiment.

FIG. 3 is a timing chart showing recording timing in the first embodiment.

FIG. 4 is a block diagram showing a configuration of a disk recording device according to a second embodiment of the present invention.

FIG. 5 is a flowchart for explaining the operation of the second embodiment;

FIG. 6 is a block diagram showing a configuration of a disk recording device according to a third embodiment of the present invention.

FIG. 7 is a timing chart showing recording timing in the third embodiment.

FIG. 8 is a block diagram showing a configuration of a disc reproducing apparatus according to a fourth embodiment of the present invention.

FIG. 9 is a schematic diagram showing a configuration of a track of a disk in the fourth embodiment.

FIG. 10 is a timing chart showing reproduction timing in the fourth embodiment.

FIG. 11 is a block diagram showing a configuration of a disc reproducing apparatus according to a fifth embodiment of the present invention.

FIG. 12 is a block diagram showing a configuration of a disc reproducing apparatus according to a sixth embodiment of the present invention.

FIG. 13 is a timing chart showing reproduction timing in the sixth embodiment.

FIG. 14 is a block diagram showing a head having another configuration according to the first to third embodiments of the present invention;

FIG. 15 is a schematic diagram showing a track configuration on a conventional disk.

FIG. 16 is a block diagram showing a configuration of a conventional disk recording / reproducing apparatus.

[Explanation of symbols]

 Reference Signs List 101 memory means 103 write address generation means 105 read address generation means 107 recording means 116 free area address extraction means 119 recording address extraction means 121 address comparison means

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsushi Kasahara 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hiroyuki Yonekura 1006 Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Yoshiki Sato 1006, Oji Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Ind. Field (Int.Cl. ⁶ , DB name) G11B 7/085

Claims (6)

(57) [Claims] 1. A recording apparatus for recording digital information on an optical disk having sectors obtained by dividing spiral or concentric tracks using an optical head, comprising: memory means for storing input digital information; Write address generation means for generating an address, read address generation means for generating a read address of the memory means in accordance with a recording command, recording means for recording digital information read from the memory means in accordance with the recording command on the optical disc, A vacant area address extracting means for extracting a start address and an end address of N (≧ 1) vacant areas from the optical disc, a recording address extracting means for extracting a recording address from the optical disc during recording, a K-th (1 ≦ K) ≤ N) Address comparing means for outputting a comparison value when the dress is smaller than the end address of the K-th free area; reading the difference between the write address and the read address when the comparison value is input; When the threshold value is exceeded, the recording command for reading and recording the upper digital information from the memory means is output, and when the comparison value is not input, the recording is stopped, and the optical head is moved to another empty area and track jump is performed. Recording command generating means for outputting a recording command; transfer means for transferring an optical head according to the recording command; tracking control means for causing the optical head to track on the track according to the recording command and causing the optical head to jump. Disc recording device comprising: 2. A continuation pointer generating means for generating a K-th continuation pointer for instructing continuation of a K-th free area and a K + 1-th free area; an information area divided into a predetermined size; TO that records the area number of the information area and the start address of the information area
Recording means for recording, together with the input digital information, the K-th continuation pointer in the TOC area on the optical disc having the C-area together with the K-th area number and the K-th start address. Item 3. The disk recording device according to Item 1. 3. A recording apparatus for recording digital information on an optical disk having sectors obtained by dividing spiral or concentric tracks using an optical head, comprising: memory means for storing input digital information; Write address generation means for generating an address, read address generation means for generating a read address of the memory means in accordance with a recording command, recording means for recording digital information read from the memory means in accordance with the recording command on the optical disc, A vacant area address extracting means for extracting a start address and an end address of N (≧ 1) vacant areas from the optical disc, a recording address extracting means for extracting a recording address from the optical disc during recording, a K-th (1 ≦ K) ≤ N) Address comparison means for outputting a comparison value when the dress is smaller than the end address of the K-th free area; and reference clock generation for generating a reference clock for determining a recording timing of the recording means and a read address timing of the memory means. Means, clock varying means for varying the rotation frequency of the optical disc and the reference clock according to the recording command, outputting the recording command when the comparison value is input, and stopping recording when the comparison value is not input Recording command generating means for transferring the optical head to another empty area and performing on-track by track jump and outputting the recording command for changing the reference clock; and transferring means for transferring the optical head according to the recording command. According to the recording command, the optical head is Disk recording apparatus and a tracking control means for a track jump the optical head causes a click. 4. A reproducing apparatus for reproducing digital information from an optical disk having sectors obtained by dividing spiral or concentric tracks using an optical head, comprising: reproducing means for reproducing digital information from the optical disk; A write address generating means for generating a write address of the memory means in accordance with the reproduction command; a read address generating means for generating a read address of the memory means; A recorded area address extracting means for extracting a start address and an end address of a recorded area, a reproduction address extracting means for extracting a reproduction address from the optical disc at the time of reproduction, and a K-th (1 ≦ K ≦ N) recorded area. Where the reproduction address is the K-th recorded area Address comparison means for outputting a comparison value when the value is smaller than the end address of the digital information; and reading the difference between the write address and the read address when the comparison value is input, and when the value is equal to or less than a predetermined threshold value, the digital information The reproduction command is output to the memory means, and when the comparison value is not inputted, the writing of digital information to the memory means is stopped, and the optical head is moved to another recorded area and the track is jumped. Playback command generation means for outputting a command, transfer means for transferring the optical head in accordance with the playback command, and tracking control means for causing the optical head to on-track on the track in accordance with the playback command and causing the optical head to jump. Disc playback device equipped. 5. A TOC in which an information area divided into a predetermined size for recording input digital information, an area number of the information area, and a start address of the information area are recorded.
Reading the K-th continuation pointer indicating the continuation of the K-th area number from the TOC area on the optical disk having the area and the K + 1-th recorded area recorded in association with the K-th start address Pointer reproducing means, and the reproduction command generating means comprises a K-th recorded area.
TOC with the continuation pointer added to the TOC address of
Start address of K + 1th recorded area from address area
After reading the address and playing the Kth recorded area
Output a reproduction command to reproduce the (K + 1) th recorded area
5. The disc reproducing apparatus according to claim 4, wherein 6. A reproducing apparatus for reproducing digital information from an optical disk having sectors obtained by dividing spiral or concentric tracks using an optical head, comprising: reproducing means for reproducing digital information from the optical disk; A write address generating means for generating a write address of the memory means in accordance with a reproduction command; a read address generating means for generating a read address of the memory means; A recorded area address extraction means for extracting a start address and an end address of a recorded area; a reproduction address extraction means for extracting a reproduction address from the optical disc during reproduction; and a K-th (1 ≦ K ≦ N) recorded area. Is the end of the K-th recorded area. Address comparison means for outputting a comparison value when the address is smaller than the end address, reference clock generation means for generating a reference clock for determining a timing of a write address of the memory means, and a rotation frequency of the optical disk and the reference clock according to the reproduction command. Clock varying means for varying, outputting the reproduction command when the comparison value is input, and stopping the writing of digital information to the memory means when the comparison value is not input, and setting the optical head to another recorded state. A reproduction command generating means for outputting the reproduction command for changing the reference clock while transferring and track jumping to the area, and a transfer means for transferring the optical head according to the reproduction command; If you make the above track on-track Disk reproducing apparatus having a tracking control means for track jump, the said optical head.