JPH06267247A - Disk editing device - Google Patents

Abstract

PURPOSE:To edit digital information on an optical disk with high precision without any empty space. CONSTITUTION:A memory means 102 stores a second digital information 111 which is obtained by reproducing and demodulating from an optical disk 1 and decoding error correction codes of N sector completion and an inputted first digital information 101. A sector address translation means 116 translates a sector address information 115 reproduced from the disk 1 by a sector address reproducing means 114 and the memory address of a memory means 102. A memory address generating means 105 controls a memory with sector unit addresses by a memory address control command 118 instructed from a first editing means 120. Moreover, the means 120 outputs a recording and reproducing command 119, a memory address control command 118 and an access control command 11, connects the information 101 and the information 111 in a sector unit, modulates N sector completion error correction codes by a recording and reproducing means 107 and performs editing.

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 or a reproducing apparatus for reproducing digital information such as audio and video from the recording medium.

[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 voice, 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 disc is well known as a disc on which an image is recorded by an analog method. An example of recording digital audio information on a conventional optical disc will be described below.

FIG. 12 is a diagram showing the track configuration of a conventional rewritable optical disc, and FIG. 13 is a diagram showing the configuration of an apparatus for recording digital information on a conventional rewritable optical disc.
FIG. 14 is a diagram showing an example of the configuration of one cluster. 12
1 has a spiral track 2 on which information is recorded on an optical disc, and the track 2 is divided into sectors of equal capacity. The sector size is 2332 bytes, and digital information is recorded therein. Addresses are added to the sectors in ascending order from the inner circumference, and a predetermined number of sectors, for example, 36 sectors, constitute one cluster. The signals are continuously recorded in order from the inner circumference, and the rotation control of the disk is CLV (Constant Linear Velocity) with a constant linear velocity. 14
In, one cluster consists of 36 sectors,
It is assumed that the error correction is completed in 36 sectors. Here, a non-complete code such as the cross interleaved Reed-Solomon code (CIRC) used in CD is used. That is, a double code of C1 and C2 is used, and the error correction code in the C2 direction is applied over a plurality of frames, so that it is not completed with a predetermined data amount. Therefore, if it is left as it is, the code is interrupted at the time of additional recording or editing, and an error occurs. As shown in the figure, the interleave length in the C2 direction is 108 frames. Therefore, a redundant part of 3 sectors is provided at the front end of one cluster to complete the code using fixed data.

In the optical disc 1 having the above-mentioned structure,
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 drive means, and 6 is a spindle which is rotation-controlled by the spindle drive means 5 to rotate the optical disk 1. 7 is spindle control means, 8
Is a spindle control command, 9 is a spindle control signal, 10
Is an access control means for moving the optical head 4 from the inner circumference to the outer circumference of the optical disc 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, and 14 is recording / reproducing. Reference numeral 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 the recording / reproducing means 14, is subjected to error correction parity over one cluster, that is, 36 sectors, and is further modulated to generate a mark pattern on the spiral track on the disc, for example. EFM modulation for converting 8 bits to 14 bits is performed, and a sync 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 transferred onto the track 2 and is on-track by the access control signal 12 provided from the access control means 10.

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

[0007]

However, in the above-mentioned conventional structure, the error correction code is completed in 36 sectors, that is, in cluster units. Since a code error occurs when the error correction code is interrupted midway, the recording operation is performed in cluster units so that the error correction code can be performed without interruption. Considering the case of recording data, recording is performed in units of 1 cluster (about 73 kbytes), but in general, the amount of data is not exactly 1 cluster, so recording of 1 cluster or more When data is recorded, there is a problem that a loss occurs in the cluster each time rewriting or additional writing is performed. That is, in the case of frequent additional recording, recording is performed in units of clusters (about 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 additional recording is performed.

When recording compressed audio or video information, for example, when the transfer rate after high-efficiency encoding is 292 kbit / sec, the recording time for one cluster is about 2 seconds, so the data is rewritten in units of one cluster. In this case, the editing unit is about 2 seconds, and the editing accuracy within the song becomes poor. Usually, the compressed frame length is often not an integer fraction of the sector length. For example, when 11 compressed frames are recorded over 2 sectors, if editing is performed in units of 1 sector, it may be interrupted in the middle of the compressed frame, resulting in deterioration. Further, even when the compressed frame length is an integer fraction of the sector length and can be rewritten in 1-sector units, since 1-sector is 2332 bytes, the editing unit is about 64 milliseconds and high-precision editing is not possible. The problem arises that it cannot be realized.

Further, there is a problem that the free area cannot be eliminated when the recording or rewriting is performed by the structure of the above conventional example and the empty area is generated in the cluster.

The present invention solves the above-mentioned conventional problems, and when editing digital information on an optical disc, it is possible to edit the digital information without causing a loss of a sector or a cluster area of the optical disc 1. It is possible. Further, it is possible to edit the compression information on the optical disk in units of compressed frames without degrading the compression information. Further, when the recorded optical disc has an empty area, the empty area can be filled and edited.

[0011]

In order to achieve this object, a disk recording apparatus of the present invention has a predetermined amount of digital information and an error correction code on an optical disk having a sector in which spiral or concentric tracks are divided. A recording / reproducing apparatus for recording / reproducing data, wherein a memory means for storing the recording digital information and the reproducing digital information, and N sectors (N: N) in the recording digital information output from the memory means at the time of recording according to a recording / reproducing command. (A positive integer) A recording that outputs a recording signal by adding a complete error correction code and by performing modulation, and demodulates a reproduction signal reproduced from the optical disc at the time of reproduction and outputs the reproduction digital information by performing error correction. A reproducing means and a memory array for generating a write address and a read address of the memory means. Address generating means, sector address reproducing means for reproducing the sector address of the sector from the optical disk, sector address converting means for converting the sector address and the memory address of the memory means, and the memory address according to the memory address control command. Address control means for performing memory address control in the sector address unit to the generation means, access control means for moving the optical head in the radial direction of the optical disc and on-tracking according to the access control instruction, the recording / reproducing instruction and the above It is provided with a first editing means for outputting the memory address control command and the access control command and recording the recorded digital information and the reproduced digital information by connecting them in units of sectors.

The disk recording apparatus of the second invention of the present application records and reproduces a predetermined amount of compressed digital information and error correction code divided into frames on an optical disk having a sector in which spiral or concentric tracks are divided. 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 at the time of recording according to a recording / reproducing command. Recording / reproducing means for adding a complete error correction code and performing modulation to output a recording signal, demodulating a reproduction signal reproduced from the optical disc during reproduction, and performing error correction to output the reproduction digital information. , A memory address 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, compressed frame address reproducing means for reproducing the compressed frame address from the optical disc, and converting the sector address and the memory address of the memory means. Sector address conversion means, compressed frame address conversion means for converting the compressed frame address and the memory address of the memory means, and the sector address and compressed frame address for the memory address generation means according to a memory address control command. Memory address control means for performing memory address control in units of sector address and compressed frame address based on the above, and for moving the optical head in the radial direction of the optical disc in accordance with an access control command and performing on-traffic Second editing means for outputting the recording / reproducing command, the memory address control command, and the access control command to connect the recorded digital information to the reproduced digital information in units of compressed frames. It is equipped with and.

The disk recording apparatus of the third invention of the present application is a recording / reproducing apparatus for recording / reproducing a predetermined amount of digital information and error correction code on / from an optical disk having a sector formed by dividing a spiral or concentric track. hand,
Memory means for storing the first reproduction digital information and the second reproduction digital information, and N sectors (N: positive integer) are completed in the recording digital information output from the memory means at the time of recording according to a recording / reproducing command. Recording / reproducing means for adding an error correction code and modulating, outputting a recording signal, demodulating a reproducing signal reproduced from the optical disc at the time of reproducing, performing error correction and outputting the reproduced digital information, A memory address generating means for generating a write address and a read address of the memory means; a sector address reproducing means for reproducing the sector address of the sector from the optical disc;
Sector address conversion means for converting the sector address and the memory address of the memory means, address control means for performing memory address control for the sector address generation means in units of the sector address according to a memory address control command, and access control Access control means for moving the optical head in the radial direction of the optical disc and on-tracking according to the command, the recording / reproducing command, the memory address control command, and the access control command are output to output the first reproduction digital information and the second reproduction information. And a third editing means for recording and recording the reproduced digital information of (1) on a sector-by-sector basis.

[0014]

According to the first aspect of the present invention, the disc recording apparatus having the above-mentioned structure demodulates the digital information reproduced from the optical disc, performs error correction, and outputs the reproduced digital information and the input first digital information. And are stored in the memory means. The sector address and memory address reproduced from the optical disk by the sector address reproducing means are converted into memory addresses by the address converting means. The address control means controls the memory at the sector unit address according to the memory address control instruction given from the first editing means. Further, the first editing means can output the address control command and the access command to record the recorded digital information and the reproduced digital information by connecting them in units of sectors.

Further, the disc recording apparatus of the second invention of the present application has the above-mentioned configuration, demodulates the digital information reproduced from the optical disc, performs error correction, and outputs the reproduced digital information output as the first input. 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 at an address in units of compressed frames 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 to record and record the recorded digital information and the reproduced digital information in units of compressed frame addresses.

The disc recording apparatus according to the third aspect of the present invention has the above-mentioned configuration, demodulates the digital information reproduced from the optical disc, performs error correction, and outputs the first reproduced digital information and the second reproduced digital information. The reproduced digital information is stored in the memory means. The sector address and memory address reproduced from the optical disk by the sector address reproducing means are converted into memory addresses by the address converting means. Address control means is third
The memory is controlled by the sector unit address by the memory address control command instructed from the editing means. Further, the third editing means can output the address control command and the access command to record the first reproduced digital information and the second reproduced digital information by linking them in sector units.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The first embodiment of the present invention is a case of editing digital information having a constant signal rate.

FIG. 1 is a diagram showing the structure of a recording apparatus according to the first embodiment of the present invention, FIG. 2 is a diagram showing the state of recording on a track of an optical disc 1, and FIG. 3 is the first embodiment of the present invention. FIG. 4 is a diagram showing the recording timing in FIG. 4, and FIG. 4 is a diagram showing the relationship between the sector address and the memory address. In Figure 1,
1, 4 to 12 are the same as the conventional example shown in FIG. The track structure on the disk is the same as that of the conventional example shown in FIG. 101 is the first digital information, 102 is the memory means, 105 is the write address 10 of the memory means 102.
3 and the memory address generating means for generating the read address 104, 106 recording digital information output from the memory means, 107 recording / reproducing means, 108 recording signals output from the recording / reproducing means, 109 optical disc 1.
A reproduction signal reproduced from the recording / reproducing means 107.
Reproduced digital information output from the memory means 111, second digital information output from the memory means 102, 113
Is address control means, 114 is 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 / playback command, and 120 is a first editing means. FIG. 2 shows a state of recording on the optical disc 1. Similar 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 the ascending order from the inner circumference, and a predetermined number of sectors form a cluster, and are recorded in cluster units. In addition, signals are continuously recorded in order from the inner circumference, and the rotation control of the disk is controlled by CLV with a constant linear velocity.
(Constant Linear Velocity). Reference numeral 131 is a first area in which the first digital information is recorded, 132 is a second area in which the second digital information continuously recorded in the first area at the editing point 133 is recorded, and 134 is in the first area 131. Part of the final cluster, 135, is part of the first cluster in the second area. In this case, since the edit is performed at the edit point 133 in one cluster, one cluster is obtained by adding the part 134 of the final cluster of the first area and the part 135 of the first cluster of the second area. You will be configuring. 136 is edit point 133
It is a rough track of a track jump from the vicinity to the 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 in 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 shown by S1, S2, ..., S36, and point P
Is the edit point. Also, a recording / playback command 119
Indicates reproduction when "1" and recording when "0". Figure 4
(A) and FIG. 4 (b) show sector addresses S1, S2, ...
.., S36 and the memory address are shown. In FIG. 4, As is the start memory address of the sector S1, Ae is the end memory address of the sector S36, and Ap1 and Ap2 are edit point memory addresses.

The operation of the disk recording apparatus of this embodiment having the above-described structure will be described below with reference to FIGS. In the first embodiment of the present invention, when the edit point P of FIG. 3, that is, 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, the reproduction signal 109 reproduced from the optical disc 1 is demodulated by the recording / reproduction means 107, subjected to error correction, and added to the memory means 102 as reproduction digital information 110. The data stored in the memory means 102 is output as the second digital information 111. During reproduction, sectors S1, S2, ..., S36 are read from the optical disk 1 by the sector address reproduction means 114.
Is reproduced and added as sector address information 115 to the sector address conversion means 116 to be 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 added to the memory means 102. The first editing means 120 indicates to the sector address converting means 116 the address of the sector Sn-1 corresponding to the editing point P. The sector address conversion means 116 obtains the edit point address Ap2 corresponding to the sector Sn-1. The address control means 113 switches the read address 104 from the second digital information 111 to the first digital information 101 at the edit point address Ap2 to the memory address generation means 105 and outputs an instruction to read the first digital information 101. .

In FIG. 3, the second digital information 111 is read from the memory means 102 up 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 edit point P in the cluster, and the recorded digital information 106 is recorded from the sector Sn to the first digital information 10.
It is 1. In FIG. 3, the first digital information 101 is shown by hatching. Memory means 102
The recorded digital information 106 read by the read address 104 is added with an error correction code by the recording / reproducing means 107, and the modulation, for example, 8 bits is set to 1
EFM modulation for conversion into 4 bits is applied, a synchronizing signal is added, and a recording signal 108 is added to the optical head 4 and recorded in cluster units. That is, the edit point address P
Up to the sector Sn-1 is recorded, and after the editing point P, the input signal, that is, the sector Sm is recorded.

FIG. 4A shows the second memory in the memory means 102.
In the area for storing the digital information 111, the memory addresses circulate during recording and reproduction, memory addresses As2 to Ae2 indicate the range of one cluster, and Ap2 is the edit point memory address. At this time,
The edit point address Ap2 indicates the final address of the sector Sn-1. FIG. 4B shows a state in which the memory address circulates during recording and reproduction in the area for recording the first digital information 101 in the memory means 102, and the memory addresses As1 to Ae1 show the 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, the second digital information 111 and the first digital information 101 are combined at the edit point addresses Ap1 and Ap2, so that the second digital information 111 is read from the memory from addresses As to Ap2, and then, ,
The first digital information 101 is read out from the addresses Ap1 to Ae1. Thus, the sector Sn-1 of the second digital information 111 and the sector Sn of the first digital information 101 are linked and recorded in one cluster. That is, in FIG. 2, the final cluster 134 in the first area
And the first cluster 135 in the second area are linked and recorded. After that, the first digital information 101 is continuously read and recorded. Therefore, it is possible to continuously record 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 disc 1 with the accuracy of the sector unit without generating a vacant area. It is possible.

5 to 7 are views showing 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 a configuration of a recording apparatus in 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 of the second embodiment of the present invention. It is a figure which shows the relationship between a compression frame address and a memory address. The second embodiment of the present invention is a case where digital information is compressed and recorded on the optical disc 1 and is edited in compressed frame units.
5, 1 and 4 to 12 are the same as the conventional example shown in FIG. The track structure on the disk is the same as that of the conventional example shown in FIG. 101-111, 113-116, 11
8 to 119 are the same as those of the first embodiment of the present invention shown in FIG. Reference numeral 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, and 505 is compressed frame address conversion for converting a compressed frame address and a memory address. Means, 50
Reference numeral 6 is a second editing means. FIG. 6 shows the recording timing when the first digital information 101 is edited in the compressed digital frame in the second digital information 111 reproduced from the optical disc 1. 6, one cluster is composed of 36 sectors shown by S1, S2, ..., S36 as in FIG. 3, and 11 frames of compressed frames correspond to 2 sectors. For example, sectors Sn-1, Sn
It is assumed that compressed frames N1, ..., N11 are recorded in. Further, it is assumed that the point Q is an edit point. The recording / playback command 119 is set to "1" for reproduction and "0" for recording. 7A and 7B show the relationship between the memory address and the compressed frame address. 7 (a) and FIG.
In (b), As1 and As2 are start addresses of the sector S1, Ae1 and Ae2 are end addresses of the sector S36, and Aq.
1 and Aq2 indicate edit point memory addresses. The boundary between the compressed frame Nq-1 and the compressed frame Nq is the sector Sn-1.
Therefore, the edit 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 edit point Q in FIG. 6, that is, the reproduced second digital information 11
Compressed frame Mq of the first digital information 101 input from the outside in the compressed frame Nq-1 in the first sector Sn-1
A case of connecting and editing will be described. In FIG. 5, the reproduction signal 109 reproduced from the optical disc 1 is demodulated by the recording / reproducing means 107, subjected to error correction, and added to the memory means 102 as reproduction digital information 110. The data accumulated in the memory means 102 is output as the second digital information 111 for each predetermined amount and added to the information compression / expansion 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, and at the same time, the compressed frame reproducing means 503.
, The addresses of the compressed frames N1, N2, ... Are reproduced and added as compressed frame address information 504 to the compressed frame conversion means 505 to obtain the sector address information 1
15 and the compressed frame address information 504 is converted into a memory address and added to the address control means 113. On the other hand, the input digital information 500 is compressed by the information compression / expansion means 502 and the first digital information 10 is compressed.
1 is added to the memory means 102. The second editing means 506 instructs the sector address converting means 116 and the compressed frame address converting means 505 of the sector Sn-1 and the compressed frame Nq-1 corresponding to the editing point Q, respectively. The sector address converting means 116 and the compressed frame address converting means 505 are 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 to the memory address generation means 105 at the edit point address Aq2.
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, recording signal 108 and 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, the recording / reproducing is performed in a burst manner as shown in FIG. 6, and the track jump is repeated in the section where the recording / reproducing is not performed. During recording, the input digital information 500 has a lower signal rate than the recorded digital information 106. A predetermined threshold value is set, the difference between the write address 103 and the read address 104 is calculated, and when the difference is equal to or more than the read start threshold value indicating the read start, the memory address generation unit 105 sets the read address 104 To generate. Since the reading speed is higher than the writing speed, the memory means 1
The data capacity in 02 is reduced 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 less than or equal to the read stop threshold value, the memory address generation means 1
05 stops the 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 revolution of the disk after the track jump, the data capacity in the memory means 102 increases,
If the read start threshold value is exceeded, 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 reproduction digital information 110. Setting a predetermined threshold value, write address 103 and read address 10
4 is obtained, and when the difference is less than or equal to the write start threshold value indicating the start of writing, the memory address generation means 105 generates the write address 103. Since the writing speed is higher than the reading speed, the memory means 102
The internal data capacity is increased by the difference between the writing speed and the reading speed. On the other hand, the write address 10
When the difference between 3 and the read address 104 is equal to or more than the write stop threshold value, the memory address generation means 105
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 if it becomes less than the write start threshold value, the write operation is restarted.

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 compressed frame units at the editing point Q in the sector, and the first digital information is recorded in the middle of the sector Sn-1 of the recorded digital information 106. 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 a synchronizing signal is added. Then, a recording signal 108 is added to the optical head 4, and recording is performed in cluster units. That is, in the output signal from the memory means 102, the compressed frame Nq-1 is recorded up to the edit point Q, and after the edit point Q, the input signal, that is, the compressed frame Mq-1 is recorded.

FIG. 7A shows a second memory in the memory means 102.
Shows that the memory address circulates at the time of recording / reproducing in the area for recording the digital information 111, 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.
Shows the final address of. FIG. 7B shows a state in which the memory addresses at the time of recording / reproducing circulate in the area for recording the first digital information 101 in the memory means 102, and the memory addresses As1 to Ae1 indicate the 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, since the second digital information 111 and the first digital information 101 are combined at the edit point addresses Aq1 and Aq2, the second digital information 111 is transferred to the address As2.
To Aq2 are read from the memory, 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 concatenated and recorded in one cluster. After that, the first digital information 101 is continuously read and recorded. Therefore, it is possible to continuously record in compressed frame units 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 disc 1 with the accuracy of the compression frame unit without generating an empty area. is there.

FIG. 8 is a diagram showing the structure of a recording apparatus in the third embodiment of the present invention, FIG. 9 is a diagram showing the recording timing in the third embodiment of the present invention, and FIG. 10 is a sector address and memory address. It is a figure which shows the relationship of. In FIG.
1, 4 to 12 are the same as the conventional example shown in FIG. The track structure on the disk is the same as that of 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 is a third editing means. FIG. 9 shows the recording timing in the third embodiment of the present invention. FIG. 9 shows the first digital information 101 reproduced from the optical disc 1 and the second digital information 11 in sector units.
This is the case where 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 and A
s2 is the start address of sector S1, Ae is sector S36
End address, Ar1 and Ar2 indicate edit point address, 801 indicates first reproduction digital information, and 802 indicates second.
3 shows reproduced digital information of.

The operation of the disk recording apparatus of this embodiment having the above-mentioned structure will be described below with reference to FIGS. 8 to 10. In the third embodiment of the present invention, the second reproduction digital information 80 at the editing point R in FIG.
A case will be described in which the sector Sm of the first reproduction digital information is connected to the second sector Sn-1 and edited. In FIG. 8, the reproduction signal 109 reproduced from the optical disk 1 is demodulated by the recording / reproducing means 107, subjected to error correction, and added to the memory means 102 as first reproduced digital information and second reproduced digital information. . During reproduction, the recording / reproducing means 107 causes the sector address reproducing means 114 to
Thus, the addresses of the sectors S1, S2, ..., S36 are reproduced and added as sector address information 115 to the sector address conversion means 116 to be converted into 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 converting means 11.
Instruct 6 The sector address conversion means 116 obtains the edit point address Ar2 corresponding to the sector Sn-1. The address control means 113 reads the read address 1 at the edit point address Ar2 to the memory address generation means 105.
An instruction to switch 04 from the second reproduction digital information 802 to the first reproduction digital information 801 is output.

In FIG. 9, the second reproduction digital information 802 is read from the memory means 102 up to the sector Sn-1 and the first reproduction digital information 80 after the sector Sn.
1 is read. That is, the first reproduction digital information 801 and the second reproduction digital information 802 are edited in sector units at the editing point R in the sector, and the recorded digital information 106 is the first reproduction digital information from the sector Sn. Has become. In FIG. 3, the first reproduction digital information is shown by hatching. The recorded digital information 106 read from the memory means 102 by the read address 104 is recorded and reproduced by the recording and reproducing means 1.
The error correction code is added by 07, and further, for example, EFM modulation for converting 8 bits to 14 bits is performed and a synchronization signal is added to the optical head 4 as a recording signal 108.
Are 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 a state in which the memory address during recording / reproduction circulates in the area for storing the second reproduction digital information 802 in the memory means 102, and the memory addresses As2 to Ae2 are in the range of one cluster. Ar2 is the edit point memory address. At this time, the edit point address Ar2 indicates the final address of the sector Sn-1. FIG. 10B shows a state in which the memory address at the time of recording / reproduction circulates in the area for recording the first reproduction digital information 801 in the memory means 102.
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 reproduction digital information 80
Since the second reproduction digital information 801 and the first reproduction digital information 801 are combined at the edit point addresses Ar1 and Ar2, the second reproduction digital information 802 is read from the memory from addresses As2 to Ar2, and then the first reproduction digital information 801 is read. Information 801
Are read from 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 linked and recorded in one cluster. After that, the first reproduction digital information is continuously read and recorded.
Therefore, it is possible to continuously record 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 other reproduction digital information on the digital information reproduced from the optical disc 1 with the accuracy of the sector unit.

In the third embodiment of the present invention,
Although the case where another reproduction digital information is edited to the digital information reproduced from the optical disk 1 with the accuracy of the sector unit is shown, the same applies to the case of editing the compression frame unit as shown in the second embodiment of the present invention. Is established.

Further, in the first to third embodiments of the present invention, the optical modulation has been described as an example, but the same applies when recording is performed by using the magneto-optical recording method. In this case, the difference is that the recording signal is applied to the magnetic head 901 instead of the optical head 4 during recording, as shown in FIG.
In FIG. 11, 901 is a magnetic head, 902 is a magnetic head drive means, and 903 is a magnetic head drive signal. The recording signal 108 is applied to the magnetic head 901 instead of the optical head 4. The access control unit 10 causes the magnetic head 901 together with the optical head 4 to be on-track on the track 2 and performs a track jump. Others are the first to the first aspect of the present invention.
This is similar to the third embodiment. On the other hand, during playback, the optical disc 1
Then, the reproduction signal is read by 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 the addresses are added in the order of ascending from the inner circumference and recorded from the inner circumference has been described, but also when recording from the outer circumference. It is the same.

In the first to third embodiments of the present invention, the case of recording / reproducing digital audio information has been described, but it goes without saying that the same applies to the case of recording / reproducing digital video information. Absent.

[0039]

As is clear from the above embodiments, according to the first embodiment of the present invention, in the case of recording on an optical disk in cluster units composed of N sectors,
The reproduced digital information and the input digital information can be edited and recorded on the optical disk in units of sectors without generating a vacant area. Therefore, the area utilization efficiency of the optical disk is high and the accuracy in units of sectors is high. Can be edited.

Further, according to the second embodiment of the present invention, when recording is performed on the optical disk in units of clusters composed of N sectors, reproduced digital information and input digital information are compressed frame units. Since it is possible to edit and record on the optical disc without creating an empty area, the space efficiency of the optical disc is high, and the compressed frame is not interrupted at the editing point and the sound quality is not deteriorated by the editing. There is an advantage that high-precision editing can be performed.

Further, according to the third embodiment of the present invention, in the case of recording on the optical disk in units of clusters composed of N sectors, the reproduced digital information and the reproduced different digital information are recorded in sectors. Since it is possible to edit and record on the optical disc without generating a vacant area in units, it is possible to improve the area utilization efficiency of the recorded optical discs that are recorded discretely.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a track configuration of a disc in 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 of 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 the 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 the 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 disc.

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

FIG. 14 is a diagram showing 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

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Kasahara 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A recording / reproducing apparatus for recording / reproducing a predetermined amount of digital information and an error correction code on an optical disc having a sector formed by dividing a spiral or concentric track, wherein the recorded digital information and the reproduced digital information are recorded and reproduced. In accordance with a recording / reproducing command, a memory means for storing and adding an error correction code of N sector (N: positive integer) completion to the recorded digital information outputted from the memory means at the time of recording and modulating the recorded signal Recording and reproducing means for outputting and reproducing the reproduced digital information by demodulating the reproduced signal reproduced from the optical disc during reproduction and outputting the reproduced digital information, and memory address generating means for generating a write address and a read address of the memory means. And re-read the sector address of the above sector from the above optical disk. Sector address reproduction means, sector address conversion means for converting the sector address and the memory address of the memory means, and memory address control for the memory address generation means in the sector address unit 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 disc and on-tracking according to the access control command, and outputting the recording / reproducing command, the memory address control command and the access control command. A disk recording / reproducing apparatus comprising: first editing means for connecting and recording digital information and the reproduced digital information in sector units. 2. A recording / reproducing apparatus for recording / reproducing a predetermined amount of compressed digital information and error correction code divided into frames on an optical disc having sectors in which spiral or concentric tracks are divided. And memory means for storing the reproduced digital information and, in accordance with the recording / reproducing command, add and correct an N-sector (N: positive integer) complete error correction code to the recorded digital information output from the memory means at the time of recording. A recording / reproducing means for outputting a recording signal and outputting the reproduced digital information by demodulating the reproduced signal reproduced from the optical disc at the time of reproduction and outputting the reproduced digital information while performing error correction. The memory address generating means for generating, and the above-mentioned disc from the optical disc. Sector address reproducing means for reproducing the sector address of the memory, compressed frame address reproducing means for reproducing the compressed frame address from the optical disk, sector address converting means for converting the sector address and the memory address of the memory means, Compressed frame address conversion means for converting a compressed frame address and the memory address of the memory means, and a sector address and a compressed frame based on the sector address and the compressed frame address for the memory address generation means according to a memory address control command. Memory address control means for performing memory address control on an address basis; access control means for moving the optical head in the radial direction of the optical disc and on-tracking it according to an access control command; A disk recording / reproducing apparatus provided with a second editing means for outputting a recording / reproducing command, the memory address control command, and the access control command and recording the recorded digital information by connecting it to the reproduced digital information in units of compressed frames. . 3. A recording / reproducing apparatus for recording / reproducing a predetermined amount of digital information and an error correction code on an optical disc having a sector formed by dividing a spiral or concentric circular track, the first reproducing digital information and the second reproducing digital information. Memory means for storing the reproduced digital information of the above, and in accordance with the 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 and modulation is performed. A recording / reproducing means for outputting a recording signal and outputting the reproduced digital information by demodulating the reproduced signal reproduced from the optical disc at the time of reproduction and outputting the reproduced digital information while performing error correction. Generating memory address generating means, and the sector of the sector from the optical disc Sector address reproducing means for reproducing the address, sector address converting means for converting the sector address and the memory address of the memory means, and memory address in the sector address unit for the sector address generating means according to a memory address control command. Address control means for controlling, access control means for moving the optical head in the radial direction of the optical disk and on-track according to the access control command, and outputting the recording / reproducing command, the memory address control command, and the access control command. A disc recording / reproducing apparatus comprising a third editing means for recording the first reproduced digital information and the second reproduced digital information by sector unit.