JP3064728B2 - Disk editing 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 apparatus for recording digital information such as audio and video on a recording medium and a reproducing apparatus for reproducing digital information such as audio and video from the recording medium.

[0002]

2. Description of the Related Art Conventionally, disks or tapes have been used as media 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.

FIG. 12 is a diagram showing a track configuration of a conventional rewritable optical disk, FIG. 13 is a diagram showing a configuration of an apparatus for recording digital information on a conventional rewritable optical disk,
FIG. 14 is a diagram showing an example of the configuration of one cluster. FIG.
In FIG. 1, reference numeral 1 denotes a spiral track 2 on which information is recorded on an optical disk, and the track 2 is divided into sectors of equal capacity. It is assumed that the sector size is 2332 bytes and digital information is recorded there. It is also assumed that addresses are added to the sectors in ascending order from the inner circumference, and that a predetermined number of sectors, for example, 36 sectors, constitute one cluster. Signals are recorded continuously from the inner circumference, and the rotation of the disk is controlled at a constant linear velocity (CLV). FIG.
, One cluster is composed of 36 sectors,
It is assumed that error correction completed in 36 sectors has been performed. Here, a non-complete code such as a cross interleaved Reed-Solomon code (CIRC) used in CD is used. In other words, a double code of C1 and C2 is used, and an error correction code in the C2 direction is applied over a plurality of frames, and is not completed with a predetermined data amount. Therefore, if this is done, the code is interrupted at the time of additional writing or editing, causing an error. As shown, the interleave length in the C2 direction is 108 frames. Therefore, a redundant section of three sectors is provided at the front end in one cluster, and the code is completed using fixed data.

The optical disk 1 configured as described above has
The operation of recording digital audio information will be described below. In FIG. 13, 1 is the same as in FIG. 12, 4 is an optical head, 5 is a spindle driving means, and 6 is a spindle, the rotation of which is controlled by the spindle driving means 5 to rotate the optical disk 1. 7 is a spindle control means, 8
Is a spindle control command, 9 is a spindle control signal, 10
Is an access control means for transferring the optical head 4 from the inner circumference to the outer circumference of the optical disk 1 and for on-tracking on the track 2; 11 is an access control command; 12 is an access control signal; 13 is input digital audio information; Means, 15 is a recording signal, 16 is a reproduction signal, 17 is output digital audio information, and 18 is system control means. In FIG. 13, the input digital audio information 13 is applied to a recording / reproducing means 14, where parity for error correction is applied to one cluster, that is, over 36 sectors, and modulation for generating a mark pattern on a spiral track on a disk, for example, EFM modulation for converting 8 bits into 14 bits is performed, and a synchronization signal is added to form a recording signal 15. The spindle control means 7 rotates the optical disc 1 at a substantially constant linear velocity. Further, the optical head 1 is transported on the track 2 and on-tracked by the access control signal 12 given from the access control means 10.

On the other hand, in the reproducing system, a reproduced signal 16 reproduced from the optical head 4 is input to the recording / reproducing means 14, where it is demodulated and error-corrected. Recording / reproducing means 14
Outputs the output digital voice information 17.

[0007]

However, in the above-mentioned conventional configuration, the error correction code is configured to be completed in 36 sectors, that is, in cluster units. If the error correction code is interrupted halfway, a code error occurs. Therefore, the recording operation is performed in cluster units so that the error correction code can be performed without interruption. Considering the case where data is recorded, recording is performed in units of one cluster (about 73 kbytes). However, in general, the data amount is not necessarily exactly one cluster, and therefore, data of one cluster or more is required. When recording data, there is a problem that a loss occurs in a cluster every time rewriting or additional recording is performed. That is, in the case of frequent additional recording, recording is performed in units of clusters (approximately 73 kbytes). Therefore, if the previous recording is interrupted in the middle of the cluster, the remaining area of the cluster cannot be used. Therefore, there is a problem that a loss occurs in the data area every time the additional recording is performed.

In the case of recording compressed audio or video information, for example, when the transfer rate after high-efficiency encoding is 292 kbit / sec, the recording time of one cluster is about 2 seconds, so that rewriting is performed in units of one cluster. In this case, the editing unit is about 2 seconds, and the editing accuracy in the music is deteriorated. Normally, the compressed frame length is often not an integer fraction of the sector length. For example, when 11 compressed frames are recorded over two sectors, editing in units of one sector may be interrupted in the middle of a compressed frame, resulting in deterioration. Even when the compressed frame length is a fraction of the sector length and can be rewritten in units of one sector, since one sector is 2332 bytes, the editing unit is about 64 milliseconds, and high-precision editing is not possible. There is a problem that it cannot be realized.

In addition, when recording or rewriting is performed by the configuration of the above-described conventional example and a free area is generated in the cluster, there is a problem that the free area cannot be eliminated.

The present invention solves the above-mentioned conventional problems. In editing digital information on an optical disk, the present invention aims to edit digital information without causing loss of sectors or cluster areas of the optical disk 1. It is possible. It is also possible to edit the compressed information without deteriorating the compressed information in units of compressed frames on the optical disc. In addition, when an empty area is generated in a recorded optical disk, the empty area can be filled and edited.

[0011]

In order to achieve this object, a disk recording apparatus according to the present invention comprises a disk or a disk having a predetermined amount of digital information and an error correction code on an optical disk having sectors divided into spiral or concentric tracks. A recording / reproducing apparatus for recording / reproducing data, comprising: memory means for storing recording digital information and reproduction digital information; and N sectors (N: A recording / reproduction that adds a complete error correction code and modulates the signal to output a recording signal, and demodulates a reproduction signal reproduced from the optical disk during reproduction and performs error correction to output the reproduction digital information. Means for generating a write address and a read address of the memory means. Generating means, sector address reproducing means for reproducing the sector address of the sector from the optical disc, sector address converting means for converting the sector address and the memory address of the memory means, and generating the memory address according to a memory address control command Address control means for performing memory address control on a sector address basis with respect to the means, access control means for moving an optical head in the radial direction of the optical disk and on-tracking in accordance with an access control command, A first editing unit for outputting the address control command and the access control command and connecting and recording the recording digital information and the reproduction digital information in sector units.

The disk recording apparatus according to the second aspect of the present invention records and reproduces a predetermined amount of compressed digital information and an error correction code divided into frames on an optical disk having sectors obtained by dividing spiral or concentric tracks. A recording / reproducing apparatus for storing recorded digital information and reproduced digital information, and N sectors (N: positive integer) in the recorded digital information output from the memory means during recording in accordance with a recording / reproducing command. Recording and reproducing means for adding a complete error correction code and performing modulation and outputting a recording signal, and at the time of reproduction, demodulating a reproduction signal reproduced from the optical disc and performing error correction and outputting the reproduced digital information; A memory address generator for generating a write address and a read address of the memory means; Means, sector address reproducing means for reproducing the sector address of the sector from the optical disk, compressed frame address reproducing means for reproducing a compressed frame address from the optical disk, and converting the sector address and the memory address of the memory means. A sector address converting means, a compressed frame address converting means for converting the compressed frame address and a memory address of the memory means, and a memory address generating means for converting the sector address and the compressed frame address to the memory address generating means in accordance with a memory address control command. Memory address control means for performing memory address control in units of sector addresses and compressed frame addresses on the basis of a sector address and a compressed frame address; Access control means for outputting the recording / reproduction command, the memory address control command, and the access control command, and connecting the recording digital information to the reproduction digital information in units of compressed frames for recording; It is provided with.

The disk recording apparatus according to the third invention of the present application is a recording / reproducing apparatus for recording / reproducing a predetermined amount of digital information and an error correction code on an optical disk having a sector obtained by dividing a spiral or concentric track. hand,
Memory means for storing the first reproduced digital information and the second reproduced digital information; and N sectors (N: a positive integer) being completed in the recorded digital information output from the memory means during recording in accordance with a recording / reproducing command. A recording / reproducing means for adding a correction code and performing modulation to output a recording signal, and at the time of reproduction, demodulating a reproduction signal reproduced from the optical disk, performing error correction and outputting the reproduction digital information, and the memory; A memory address generating means for generating a write address and a read address of the means; a sector address reproducing means for reproducing the sector address of the sector from the optical disk; and a sector address conversion for converting the sector address and the memory address of the memory means. Means and according to the memory address control command Address control means for performing memory address control on a sector address basis with respect to a sector address generation means; access control means for moving an optical head in a radial direction of the optical disk and on-tracking in accordance with an access control command; And third editing means for outputting the memory address control command and the access control command and connecting and recording the first reproduced digital information and the second reproduced digital information in sector units. .

[0014]

The disk recording apparatus according to the first aspect of the present invention, having the above-described configuration, demodulates digital information reproduced from the optical disk, corrects the error, and outputs the reproduced digital information and the input first digital information. Are stored in the memory means. The sector address and the memory address reproduced from the optical disk by the sector address reproducing means are converted into the memory address by the address converting means. The address control means controls the memory at an address in sector units according to a memory address control command instructed from the first editing means. Further, the first editing means can output the address control command and the access command, and connect and record the recording digital information and the reproduction digital information in sector units.

Further, according to the disk recording apparatus of the second invention of the present application, the digital information reproduced from the optical disk is demodulated and error-corrected by the above configuration, and the reproduced digital information and the input first digital information are inputted. The digital information is stored in the memory means. The sector address reproduced from the optical disk by the sector address reproducing means and the memory address reproduced from the optical disk by the compressed frame reproducing means are converted into memory addresses by the sector address converting means and the compressed frame address converting means, respectively. The address control means controls the memory with a compressed frame unit address according to a memory address control command instructed by the second editing means. Also,
The second editing means can output the address control command and the access command, and connect the recording digital information and the reproduction digital information in units of compressed frame addresses to record.

Further, according to the third aspect of the present invention, with the above-described configuration, the first reproduced digital information output after demodulating the digital information reproduced from the optical disk and performing error correction, and the second reproduced digital information. The reproduced digital information is stored in the memory means. The sector address and the memory address reproduced from the optical disk by the sector address reproducing means are converted into the memory address by the address converting means. Address control means
The memory is controlled by an address in sector units according to a memory address control command instructed by the editing means. Further, the third editing means can output the address control command and the access command, and connect and record the first reproduced digital information and the second reproduced digital information in sector units.

[0017]

An embodiment of the present invention will be described below with reference to the drawings. The first embodiment of the present invention is for editing digital information having a constant signal rate.

FIG. 1 is a diagram showing a configuration of a recording apparatus according to a first embodiment of the present invention, FIG. 2 is a diagram showing a state of recording on a track of an optical disk 1, and FIG. 3 is a first embodiment of the present invention. FIG. 4 is a diagram showing a relationship between a sector address and a memory address. In FIG.
Reference numerals 1, 4 to 12 are the same as the conventional example shown in FIG. The track configuration on the disk is the same as the conventional example shown in FIG. 101 is first digital information, 102 is memory means, 105 is a write address 10 of the memory means 102
3 and a memory address generating means for generating the read address 104; 106, recording digital information output from the memory means; 107, a recording / reproducing means; 108, a recording signal output from the recording / reproducing means;
A reproduction signal reproduced from the recording / reproducing means 107
The reproduced digital information 111 output from the memory means 102 is the second digital information output from the memory means 102.
Is an address control means, 114 is a sector address reproducing means for reproducing a sector address from the optical disk 1, 115 is sector address information, 116 is a sector address converting means for converting the sector address and the memory address of the memory means 102, and 118 is an address. A control command 119 is a recording / reproducing command, and 120 is a first editing unit. FIG. 2 shows a state of recording on the optical disc 1. Similarly to the conventional optical disk shown in FIG. 13, the optical disk 1 has a spiral track 2 on which information is recorded, and the track 2 is divided into sectors of equal capacity. Addresses are added to the sectors in ascending order from the inner circumference, and a predetermined number of sectors constitute a cluster, and are recorded in cluster units. The signal is recorded continuously from the inner circumference in order, and the rotation of the disk is controlled by a constant linear velocity CLV.
(Constant Linear Velocity). 131 is a first area in which the first digital information is recorded, 132 is a second area in which the second digital information is recorded at the editing point 133 and connected to the first area, and 134 is the first area 131. Part 135 of the last cluster is part of the first cluster of the second area. In this case, since the editing is performed at the editing point 133 in one cluster, a part obtained by adding the part 134 of the last cluster in the first area and the part 135 of the first cluster in the second area is one cluster. It is composed. 136 is the edit point 133
It is an approximate trajectory of a track jump from a vicinity to an inner track. FIG. 3 shows the recording timing in the first embodiment of the present invention. FIG. 3 shows a case where the first digital information 101 is edited in sector units on the second digital information 111 reproduced from the optical disc 1. In FIG. 3, it is assumed that one cluster is composed of 36 sectors indicated by S1, S2,..., S36.
Is an edit point. Also, the recording / reproducing command 119
Is "1" for reproduction and "0" for recording. FIG.
4 (a) and FIG. 4 (b) show sector addresses S1, S2,.
, Shows the relationship between S36 and the memory address. In FIG. 4, As indicates the head memory address of the sector S1, Ae indicates the last memory address of the sector S36, and Ap1 and Ap2 indicate the edit point memory addresses.

The operation of the disk recording apparatus of the present embodiment configured as described above will be described below with reference to FIGS. In the first embodiment of the present invention, the edit point P shown in FIG. 3, ie, the sector Sn-1 of the reproduced second digital information 111 and the sector Sn of the input first digital information are connected and edited. Will be described. In FIG. 1, a reproduction signal 109 reproduced from the optical disk 1 is demodulated and error-corrected by a recording / reproducing means 107, and is applied to a memory means 102 as reproduced digital information 110. The data stored in the memory means 102 is output as second digital information 111. .., S36 from the optical disk 1 by the sector address reproducing means 114 during reproduction.
Is reproduced and added to the sector address conversion means 116 as sector address information 115, converted into a memory address corresponding to the sector address, and supplied to the address control means 113. On the other hand, the first digital information 101 is applied to the memory means 102. The first editing unit 120 instructs the sector address conversion unit 116 of the address of the sector Sn-1 corresponding to the editing point P. The sector address conversion means 116 obtains an edit point address Ap2 corresponding to the sector Sn-1. The address control unit 113 outputs an instruction to the memory address generation unit 105 to read the first digital information 101 by switching the read address 104 from the second digital information 111 to the first digital information 101 at the edit point address Ap2. .

In FIG. 3, the second digital information 111 is read from the memory means 102 to the sector Sn-1 and the first digital information 101 is read after the sector Sm. That is, the first digital information 101 and the second digital information 111 are edited in sector units at the editing point P in the cluster, and the recorded digital information 106 is shifted from the sector Sn to the first digital information 10.
It is 1. In FIG. 3, the first digital information 101 is indicated by hatching. Memory means 102
The record digital information 106 read out from the read address 104 is added with an error correction code by the recording / reproducing means 107, and further modulates, for example, 8 bits into 1
The data is subjected to EFM modulation for conversion into 4 bits, added with a synchronization signal, added to the optical head 4 as a recording signal 108, and recorded in cluster units. That is, the edit point address P
Until the editing point P, the input signal, that is, the sector Sm is recorded.

FIG. 4 (a) shows the second data stored in the memory means 102.
During recording and reproduction in an area for storing the digital information 111, memory addresses circulate, memory addresses As2 to Ae2 indicate a range of one cluster, and Ap2 is an edit point memory address. At this time,
The edit point address Ap2 indicates the last address of the sector Sn-1. FIG. 4B shows a state in which memory addresses circulate during recording and reproduction in an area for recording the first digital information 101 in the memory means 102, and the memory addresses As1 to Ae1 indicate a range of one cluster. ,
Ap1 is the edit point memory address. At this time, the edit point address Ap1 indicates the first address of the sector Sn. At the time of recording, since the second digital information 111 and the first digital information 101 are combined at the edit point addresses Ap1 and Ap2, the second digital information 111 is read from the memory up to the addresses As to Ap2, and thereafter, ,
The first digital information 101 is read from the addresses Ap1 to Ae1. As a result, the sector Sn-1 of the second digital information 111 and the sector Sn of the first digital information 101 are connected and recorded in one cluster. That is, in FIG. 2, the last cluster 134 of the first area
And the first cluster 135 of the second area are connected and recorded. Thereafter, the first digital information 101 is continuously read and recorded. Therefore, it is possible to record continuously in sector units without generating an empty area in one cluster.

As described above, according to the first embodiment of the present invention, the input digital information is continuously recorded and edited in the digital information reproduced from the optical disk 1 with the accuracy of the sector unit without generating an empty area. It is possible.

FIGS. 5 to 7 show a second embodiment of the present invention. The second embodiment of the present invention is for recording compressed digital information. FIG. 5 is a diagram showing the configuration of a recording apparatus according to the second embodiment of the present invention, FIG. 6 is a diagram showing recording timing in the second embodiment of the present invention, and FIG. 7 is a diagram showing the timing of the second embodiment of the present invention. FIG. 4 is a diagram illustrating a relationship between a compressed frame address and a memory address. The second embodiment of the present invention relates to a case where digital information is compressed and recorded on the optical disk 1 and edited in units of compressed frames.
5, reference numerals 1, 4 to 12 are the same as the conventional example shown in FIG. The track configuration on the disk is the same as the conventional example shown in FIG. 101-111, 113-116, 11
8 to 119 are the same as in the first embodiment of the present invention shown in FIG. 500 is input digital information, 501 is output digital information, 502 is information compression / expansion means, 503 is compressed frame address reproduction means, 504 is compressed frame address information, 505 is a compressed frame address conversion for converting a compressed frame address and a memory address. Means, 50
Reference numeral 6 denotes a second editing unit. FIG. 6 shows the recording timing when the first digital information 101 is edited in units of compressed frames in the second digital information 111 reproduced from the optical disc 1. In FIG. 6, one cluster is composed of 36 sectors S1, S2,..., S36 as in FIG. 3, and it is assumed that 11 frames of compressed frames correspond to two sectors. For example, sectors Sn-1, Sn
, N11,... Are recorded. It is also assumed that point Q is an editing point. The recording / reproducing command 119 is "1" for reproducing and "0" for recording. FIGS. 7A and 7B show the relationship between the memory address and the compressed frame address. FIG. 7 (a), FIG.
In (b), As1 and As2 are the start addresses of sector S1, Ae1 and Ae2 are the end addresses of sector S36, Aq
1, Aq2 indicates an edit point memory address. The boundary between the compressed frame Nq-1 and the compressed frame Nq is the sector Sn-1.
Therefore, the editing point Aq2 is a point in the sector Sn-1.

The operation of the second embodiment of the present invention configured as described above will be described below with reference to FIGS. In the second embodiment of the present invention, the editing point Q in FIG.
A compressed frame Mq of the first digital information 101 input from the outside is added to a compressed frame Nq-1 in one sector Sn-1.
Will be described below. In FIG. 5, a reproduction signal 109 reproduced from the optical disc 1 is demodulated and error-corrected by a recording / reproducing means 107, and is applied to a memory means 102 as reproduced digital information 110. The data stored in the memory means 102 is output as second digital information 111 for each predetermined amount and is applied to the information compression / decompression means 502. The second digital information 111 is expanded by the information compression / expansion means 502 and output as output digital information 501. During reproduction, the addresses of the sectors S1, S2,..., S36 are reproduced from the optical disk 1 by the sector address reproducing means 114 and supplied to the sector address converting means 116 as sector address information 115. At the same time, the compressed frame reproducing means 503
.. Are reproduced and added to the compressed frame converting means 505 as compressed frame address information 504, and the sector address information 1
15 and converted to a memory address corresponding to the compressed frame address information 504 and added to the address control means 113. On the other hand, the input digital information 500 is compressed by the information
1 is added to the memory means 102. The second editing means 506 instructs the sector Sn-1 and the compressed frame Nq-1 corresponding to the editing point Q to the sector address converting means 116 and the compressed frame address converting means 505, respectively. The sector address converting means 116 and the compressed frame address converting means 505 provide the sector address Sn-1 and the compressed frame Nq.
An edit point address Aq2 corresponding to -1 is obtained. The address control means 113 sends the read address 10 at the edit point address Aq2 to the memory address generation means 105.
4 is switched from the second digital information 111 to the first digital information 101, and an instruction to read the first digital information 101 after the edit point memory address Aq1 is output.

In FIG. 5, the recording signal 108 and the reproduction signal 1
It is assumed that the signal rate of the digital information in 09 is higher than the signal rates of the first digital information 101 and the second digital information 111. Therefore, recording and reproduction are performed in bursts as shown in FIG. 6, and track jumps are repeated in sections where recording and reproduction are not performed. During recording, the input digital information 500 has a lower signal rate than the recording digital information 106. A predetermined threshold value is set, a difference between the write address 103 and the read address 104 is obtained, and when the difference is equal to or larger than a read start threshold value indicating the start of reading, the memory address generating means 105 sets the read address 104 Generate. Since the reading speed is higher than the writing speed,
The data capacity in 02 decreases by the difference between the writing speed and the reading speed. On the other hand, when the difference between the write address 103 and the read address 104 is equal to or less than the read stop threshold, the memory address generation means 1
05 stops generation of the read address 104. At the same time, the access control command 11 is sent to the tracking control means 111 to cause the optical head 4 to jump one track forward. During one rotation of the disk after the track jump, the data capacity in the memory means 102 increases,
When the value becomes equal to or larger than the read start threshold, the read operation is started again.

In the case of reproduction, the above is reversed. That is,
During reproduction, the output digital information 501 has a lower signal rate than the reproduced digital information 110. A predetermined threshold value is set, and the write address 103 and the read address 10
The memory address generation means 105 generates a write address 103 when the difference from the write address is equal to or smaller than a write start threshold value indicating the start of writing. Since the writing speed is higher than the reading speed, the memory means 102
Will increase by the difference between the writing speed and the reading speed. On the other hand, the write address 10
When the difference between the address 3 and the read address 104 is equal to or larger than the write stop threshold value,
Stops the generation of the write address 103. At the same time, the access control command 11 is sent to the tracking control means 111 to cause the optical head 4 to jump one track forward. During one rotation of the disk after the track jump, the data capacity in the memory means 102 decreases, and when the data capacity becomes equal to or less than the write start threshold value, the write operation is started again.

In FIG. 6, the second digital information 111 is read from the memory means 102 up to the compressed frame Nq-1, and the first digital information 101 is read after the compressed frame Mq. That is, the first digital information and the second digital information are edited in the unit of a compressed frame at the editing point Q in the sector. It has become. In FIG. 6, the first digital information is indicated by hatching. The recording digital information 106 read from the memory means 102 by the read address 104 is added with an error correction code by the recording / reproducing means 107, and further subjected to modulation, for example, EFM modulation for converting 8 bits into 14 bits, and adding a synchronization signal. Then, the signal is applied to the optical head 4 as a recording signal 108, and is recorded in cluster units. That is, in the output signal from the memory means 102, the compressed frame Nq-1 is recorded up to the editing point Q, and the input signal, that is, the compressed frame Mq-1 is recorded after the editing point Q.

FIG. 7A shows the state of the second memory in the memory means 102.
In the area where the digital information 111 is recorded, the memory address circulates during recording and reproduction, and the memory addresses As2 to Ae2 indicate the range of one cluster.
Aq2 is the edit point memory address. At this time, the edit point address Aq2 is the compressed frame Nq-1 in the sector Sn-1.
Indicates the final address of the device. FIG. 7B shows a state where memory addresses circulate during recording and reproduction in an area of the memory means 102 where the first digital information 101 is recorded, and memory addresses As1 to Ae1 indicate a range of one cluster. Aq1 is the edit point memory address. At this time, the edit point address Aq1 indicates the first address of the compressed frame Mq in the sector Sn-1. At the time of recording, the second digital information 111 and the first digital information 101 are combined at the edit point addresses Aq1 and Aq2, so that the second digital information 111 is stored at the address As2.
To Aq2, and then the first digital information 101 is read to memory addresses Aq1 to Ae1. As a result, the compressed frame Nq-1 of the second digital information 111 and the compressed frame Mq of the first digital information 101 are connected and recorded in one cluster. Thereafter, the first digital information 101 is continuously read and recorded. Therefore, it is possible to record continuously in units of compressed frames without generating an empty area in one cluster.

As described above, according to the second embodiment of the present invention, it is possible to edit the input digital information in the digital information reproduced from the optical disk 1 with a precision of a compression frame unit without generating an empty area. is there.

FIG. 8 is a diagram showing a configuration of a recording apparatus according to the third embodiment of the present invention, FIG. 9 is a diagram showing recording timing in the third embodiment of the present invention, and FIG. 10 is a diagram showing sector addresses and memory addresses. FIG. In FIG.
Reference numerals 1, 4 to 12 are the same as the conventional example shown in FIG. The track configuration on the disk is the same as the conventional example shown in FIG. 102-110, 113-116, 118-119
Is the same as the first embodiment of the present invention shown in FIG. Reference numeral 800 denotes a third editing unit. FIG. 9 shows the recording timing in the third embodiment of the present invention. FIG. 9 shows that the first digital information 101 reproduced from the optical disc 1 has the second digital information 11 in sector units.
1 is edited. FIG. 10 shows the sector address S
The relationship between 1, S2,..., S36 and the memory address is shown. In FIGS. 10A and 10B, As1, A
s2 is the start address of sector S1, Ae is sector S36.
, Ar1 and Ar2 indicate edit point addresses, 801 indicates first reproduced digital information, and 802 indicates second reproduced digital information.
2 shows reproduced digital information.

The operation of the disk recording apparatus of the present embodiment configured as described above will be described below with reference to FIGS. In the third embodiment of the present invention, the second reproduced digital information 80 is set at the editing point R in FIG.
A case where the sector Sm of the first reproduced digital information is linked to the second sector Sn-1 for editing will be described. In FIG. 8, a reproduction signal 109 reproduced from the optical disk 1 is demodulated and error-corrected by a recording / reproducing means 107, and is applied to a memory means 102 as first reproduced digital information and second reproduced digital information. . At the time of reproduction, the sector address reproducing means 114 is output from the recording / reproducing means 107.
, S36 are reproduced, added to the sector address conversion means 116 as sector address information 115, converted to a memory address corresponding to the sector address, and supplied to the address control means 113. The third editing means 800 converts the address of the sector Sn-1 corresponding to the editing point R into the sector address conversion means 11
Instruct 6 The sector address conversion means 116 obtains an edit point address Ar2 corresponding to the sector Sn-1. The address control unit 113 sends the read address 1 at the edit point address Ar2 to the memory address generation unit 105.
04 is output from the second reproduced digital information 802 to the first reproduced digital information 801.

In FIG. 9, the second reproduced digital information 802 is read from the memory means 102 up to the sector Sn-1, and the first reproduced digital information 80 is read after the sector Sn.
1 is read. In other words, the first reproduced digital information 801 and the second reproduced digital information 802 are edited in sector units at the editing point R in the sector, and the recording digital information 106 is shifted from the sector Sn to the first reproduced digital information. It has become. In FIG. 3, the first reproduced digital information is indicated by hatching. The recorded digital information 106 read from the memory means 102 by the read address 104 is stored in the recording / reproducing means 1
07, an error correction code is added thereto, and further a modulation, for example, EFM modulation for converting 8 bits into 14 bits is performed, and a synchronization signal is added.
And is recorded in cluster units. That is, the sector Sn-1 is recorded up to the edit point address R, and the sector Sn is continuously recorded after the edit point R.

FIG. 10A shows how memory addresses circulate during recording / reproduction in an area for storing the second reproduction digital information 802 in the memory means 102, and the memory addresses As2 to Ae2 correspond to the range of one cluster. , Ar2 is the edit point memory address. At this time, the edit point address Ar2 indicates the last address of the sector Sn-1. FIG. 10B shows a state where the memory address circulates at the time of recording / reproduction in an area of the memory means 102 where the first reproduction digital information 801 is recorded.
The memory addresses As1 to Ae1 indicate the range of one cluster, and Ar1 is the edit point memory address. At this time, the edit point address Ar1 indicates the first address of the sector Sn. During recording, the second reproduced digital information 80
2 and the first reproduced digital information 801 are connected at the edit point addresses Ar1 and Ar2, so that the second reproduced digital information 802 is read from the memory up to the addresses As2 to Ar2, and thereafter the first reproduced digital information 802 is read. Information 801
Are read out to the addresses Ar1 to Ae1. As a result, the sector Sn-1 of the second reproduced digital information 802 and the sector Sn of the first reproduced digital information 801 are connected and recorded in one cluster. Thereafter, the first reproduced digital information is continuously read and recorded.
Therefore, continuous recording can be performed without generating an empty area in one cluster.

As described above, according to the third embodiment of the present invention, it is possible to edit different digital data reproduced from the optical disc 1 with the accuracy of sector unit.

In the third embodiment of the present invention,
The case where another piece of reproduction digital information is edited with the accuracy of a sector unit in the digital information reproduced from the optical disk 1 has been described. The same applies to the case of editing the compression frame unit as shown in the second embodiment of the present invention. Holds.

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 a magneto-optical recording method. In this case, the difference is that at the time of recording, the recording signal is applied to the magnetic head 901 instead of the optical head 4 as shown in FIG.
In FIG. 11, reference numeral 901 denotes a magnetic head, 902 denotes a magnetic head driving unit, and 903 denotes a magnetic head driving signal. The recording signal 108 is applied to the magnetic head 901 instead of the optical head 4. The access control means 10 makes the magnetic head 901 on track 2 along with the optical head 4 and performs a track jump. Others are the first to the present invention.
This is similar to the third embodiment. 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. The subsequent operation is the same as in the first to third embodiments of the present invention.

Further, in the first to third 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.

Although the first to third embodiments of the present invention have been described for the case of recording and reproducing digital audio information, it goes without saying that the same applies to the case of recording and reproducing digital video information. Absent.

[0039]

As is clear from the above embodiments, according to the first embodiment of the present invention, when recording is performed on an optical disc in units of clusters composed of N sectors,
The reproduced digital information and the inputted digital information can be edited and recorded on the optical disk without creating a free area in sector units, so that the area utilization efficiency of the optical disk is high and the precision is high in sector units. Can be edited.

Further, according to the second embodiment of the present invention, when recording on an optical disk in units of clusters composed of N sectors, the reproduced digital information and the input digital information are compressed in units of compressed frames. The data can be edited and recorded on the optical disk without creating an empty area, so that not only the space efficiency of the optical disk is high but also the compressed frame is not interrupted at the editing point and the sound quality is not degraded by the editing. There is an advantage that high-precision editing can be performed.

According to the third embodiment of the present invention, when recording is performed on an optical disk in units of clusters composed of N sectors, reproduced digital information and another reproduced digital information are separated by a sector. edit without causing any vacant area can be recorded on the optical disk in units, recorded light is recorded at intervals
The area utilization efficiency of the disc can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a track of a disk according to the first embodiment of the present invention.

FIG. 3 is a diagram showing recording timing in the first embodiment of the present invention.

FIG. 4 is a diagram showing a relationship between a sector address and a memory address in the first embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 6 is a diagram showing recording timing according to a third embodiment of the present invention.

FIG. 7 is a diagram showing a relationship between a compressed frame address and a memory address in a third embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of a third exemplary embodiment of the present invention.

FIG. 9 is a diagram showing recording timing in a third embodiment of the present invention.

FIG. 10 is a diagram showing a relationship between a sector address and a memory address in a third embodiment of the present invention.

FIG. 11 is a diagram showing a head having another configuration according to the first to third embodiments of the present invention.

FIG. 12 is a diagram showing a track configuration on a disk;

FIG. 13 is a diagram showing a configuration of a conventional example.

FIG. 14 shows a data structure.

[Explanation of symbols]

 102 memory means 105 memory address generating means 120 first editing means 116 sector address converting means 505 compressed frame address converting means 506 second editing means 800 third editing means

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tetsushi Kasahara 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-63-197031 (JP, A) JP-A-6-196 96559 (JP, A) JP-A-5-242477 (JP, A) JP-A-6-259887 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 27/02-27 / 08

Claims (3)

(57) [Claims] 1. A recording / reproducing apparatus for recording / reproducing a predetermined amount of digital information and an error correction code on an optical disk having sectors obtained by dividing spiral or concentric tracks, wherein the recording digital information and the reproduced digital information are According to a memory means for storing, and according to a recording / reproducing command, at the time of recording, an error correction code complete with N sectors (N: positive integer) is added to the recording digital information outputted from the memory means and modulation is performed. A recording / reproducing means for demodulating a reproduction signal reproduced from the optical disk at the time of reproduction, performing error correction and outputting the reproduction digital information, and generating a write address and a read address of the memory means. Memory address generating means for reproducing a sector address of the sector from the optical disk A sector address reproducing unit, a sector address converting unit for converting the sector address and the memory address of the memory unit, and a memory address control for the memory address generating unit in units of the sector address according to a memory address control command. Address control means, access control means for moving the optical head in the radial direction of the optical disk and on-tracking in accordance with the access control command, and outputting the recording / reproducing command, the memory address control command, and the access control command, and A disk recording / reproducing apparatus comprising: a first editing unit for connecting digital information and the reproduced digital information in a sector unit and recording the data. 2. A recording / reproducing apparatus for recording / reproducing a predetermined amount of compressed digital information divided into frames and an error correction code on an optical disk having sectors obtained by dividing spiral or concentric tracks, comprising: Memory means for storing information and reproduced digital information; and in accordance with a recording / reproducing command, at the time of recording, an N-sector (N: positive integer) complete error correction code is added to the recorded digital information outputted from the memory means and modulation is performed. Recording and reproducing means for outputting a recording signal, demodulating a reproduction signal reproduced from the optical disk at the time of reproduction, performing error correction, and outputting the reproduced digital information, and a write address of the memory means. A memory address generating means for generating a read address and a read address; A sector address reproducing means for reproducing a sector address of the data, a compressed frame address reproducing means for reproducing a compressed frame address from the optical disk, a sector address converting means for converting the sector address and a memory address of the memory means, A compressed frame address converting means for converting a compressed frame address and a memory address of the memory means; and a sector address and a compressed frame based on the sector address and the compressed frame address to the memory address generating means in accordance with a memory address control command. Memory address control means for performing memory address control in address units; access control means for moving the optical head in the radial direction of the optical disk and on-tracking in accordance with an access control command; Disk recording and reproducing apparatus and a second editing means for recording and outputs the reproduction command and the memory address control command and said access control command to the recording digital information by connecting a compressed frame in the reproduced digital information. 3. A recording / reproducing apparatus for recording / reproducing a predetermined amount of digital information and an error correction code on an optical disk having a sector obtained by dividing a spiral or concentric track, comprising: first reproducing digital information; Memory means for storing the reproduction digital information of the data storage means, and in accordance with a recording / reproduction command, at the time of recording, an N-sector (N: positive integer) complete error correction code is added to the recording digital information output from the memory means and modulation is performed. Recording and reproducing means for outputting a recording signal, demodulating a reproduction signal reproduced from the optical disk at the time of reproduction, performing error correction, and outputting the reproduced digital information, and a write address of the memory means. And a memory address generating means for generating a read address and a sector address of the sector from the optical disc. A sector address reproducing means for reproducing the address, a sector address converting means for converting the sector address and the memory address of the memory means, and a memory address for the sector address generating means in accordance with the memory address control command in units of the sector address. Address control means for performing control, access control means for moving the optical head in the radial direction of the optical disk in accordance with the access control command and for on-tracking, outputting the recording / reproducing command, the memory address control command, and the access control command. And a third editing means for connecting and recording the first reproduced digital information and the second reproduced digital information in sector units.