JPH09245468A - Md system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a MD system (mini disc) which can avoid loss of original data even when the failure in editing occurs. SOLUTION: Data on a disc desired to edit are previously divided into sections each consisting of integral multiple (e.g. 12) of a cluster to be copied into a vacant area on the disc through a memory. At this point, as the last part is not finished just at 12 in the number of clusters, if a start point (L+12N:0:0) of the cluster following the data written by the N-1th processing is searched, the data is written at this point while an address (2H+1-L:i:j) corresponding to the atop point of the data written into the vacant area is written into a UTOC area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an MD (Mini Disk) system which is optimal for performing punch-in / out, ping-pong, overdub editing, etc. on recorded data.

[0002]

2. Description of the Related Art Conventionally, as a method for editing music data recorded in a storage medium without destroying the original music data, H
Non-destructive editing by a D recorder (Hard Disc recorder) is known. This method makes use of the characteristics of the high-speed transfer rate and random access of the HDD, and when you want to edit punch-in / out, ping-pong, overdub, etc. on a pre-recorded song, you can use the original song data. While leaving it, a new edit signal is written in a new empty area, and finally, by managing the address, a new edit song is apparently created. As a result, even if the editing fails, only the portion of the new editing signal needs to be erased, and the original portion remains, so that it can be redone as many times as necessary.

[0003]

On the other hand, in MD, since the transfer rate is not high, as the number of channels increases, an edit signal written in a new area of an arbitrary channel in the song becomes a part of the original song. It becomes difficult to make one song by combining it with. Therefore, up to now, when such an edit is attempted in the MD system, a method of directly editing the original data and replacing it with a new edit signal has been adopted. However, this method has a problem that if the editing fails, the original part is broken and the redo cannot be performed.

An object of the present invention is to provide an MD system capable of avoiding loss of original data when editing fails.

[0005]

An MD system according to the present invention is an MD system having a function of editing data recorded on a disc, in which data to be edited recorded on the disc is temporarily stored. Memory and
It is characterized in that it is provided with means for copying the data stored in this memory to an empty area on the disk, and means for executing an editing process on the data copied by this means.

Another MD system according to the present invention is an MD system having an editing function of data recorded on a disc, wherein the data to be edited recorded on the disc is a fixed amount which is an integral multiple of a cluster. A memory for storing each of the data, a means for copying the data to be edited by the fixed amount through the memory to an empty area on the disk, and a means for executing an editing process on the data copied by this means. It is characterized by having and.

According to the MD system of the present invention, the data on the disc to be edited is copied to the free area on the disc in advance, so that the loss of the original data when the editing fails can be avoided. . Therefore, even if the editing fails, the destroyed data only has to be erased, and the original data or the same data as the original remains, so that it is possible to redo again and again.

According to another MD system of the present invention, since the data on the disk to be edited is divided and copied to the free area, the capacity of the memory for temporarily storing the data can be reduced. Therefore, a cheaper memory can be used, and the cost can be reduced. At this time, the data recorded on the disc is copied to the empty area for each integral multiple of the cluster of MD format, so that it can be matched with the error correction processing unit and the copy processing can be facilitated. You can also

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an MD system having an MTR (multi-track recorder) function according to an embodiment of the present invention. The MD type disk 1 is a magneto-optical disk capable of recording and reproduction. The disk 1 is rotated by a spindle motor 2 at a constant linear velocity, for example.
Above and below the disk 1, a magnetic recording head 3 and an optical pickup 4 are arranged to face each other with the disk 1 interposed therebetween. The magnetic recording head 3 applies a magnetic field to the disk 1 when writing information to the disk 1. The optical pickup 4 has a function of optically reading information from the disk 1 and a function of writing information on the disk 1 in cooperation with the magnetic recording head 3. The optical pickup 4 can be moved in the radial direction of the disc 1 by a feed motor 5. The read output of the optical pickup 4 is amplified by the radio frequency (RF) amplifier 6 and supplied to the servo control unit 7. The servo control unit 7 executes rotation control of the spindle motor 2, feed control of the feed motor 5, and focus / tracking control of the optical pickup 4 based on the pickup output.

The reproducing system of this MD system is constructed as follows. That is, the output of the RF amplifier 6 is EFM
(Eight to Fourteen Modulation) -ACIRC (Adva
ncedCross Interleave Reed-solomon Code) is also supplied to the encoder / decoder 8, where it is decoded by an error correction method by ACIRC, and demodulated from 14-bit data to 8-bit data, and the memory controller 9 is also controlled. And are stored in the memory 10 such as a RAM. The reproduction address at that time is given by decoding the output of the RF amplifier 6 by the address decoder 11. The data accumulated in the memory 10 is appropriately read by the memory controller 9, and the audio compression / decompression unit 12
After being expanded by, it is D / A converted by the D / A converter 13 and output as a reproduced audio output signal.

The recording system of this MD system is constructed as follows. That is, the audio input signal to be recorded is A / D converted by the A / D converter 14 and supplied to the audio compression / decompression unit 12. The data supplied to the audio compression / decompression unit 12 is compressed here and then stored in the memory 10 under the control of the memory controller 9.
The data to be recorded in the memory 10 is supplied to the EFM / ACIRC encoder / decoder 8 under the control of the memory controller 9, is EFM modulated and ACIRC encoded, and is then supplied to the head drive unit 15. The magnetic recording head 3 is driven by the head driving unit 15 to record necessary data on the disk 1.

In addition to the above, the MD system further includes a system controller 16 for controlling the entire system, a display unit 17 for displaying various information, and original data to be copied from the audio data recorded on the disc 1. And a plurality of operation keys 18 for designating the like. The system controller 16 has a function of dividing the data on the disk 1 into blocks in accordance with the input from the operation keys 18, and an address corresponding to both ends of the cut-out data in the UTOC area of the disk 1 according to the input from the operation keys 18. A function to record and search this address based on the specified playback order, and M
It has a function of outputting an IDI message and tempo clock TM1.

FIG. 2 shows a UTO recorded on the disc 1.
It is a figure which shows an example of C area information. Disc 1 UT
In the OC area, the time code address 21 of the data recorded on the disc 1 is recorded. The time code address 21 is composed of a cluster address 22, a sector address 23, and a sound group address 24. When n pieces of music are recorded on the disc 1, the addresses (0: 0: 0, 100: 20: 30), (100) corresponding to the start point and stop point of each piece of the track numbers 1 to n are stored in advance. : 2
0:31, 200: 50: 10), ..., (L: m: n,
H: i: j), ... Are recorded.

Next, a song copy by the MD system thus constructed will be described. Now memory 1
The capacity of 0 is 1MB, and the data on disk 1
Consider a case where a block is divided into two clusters and copied. FIG. 3 is a diagram showing the flow of signals on the disc 1, and FIG. 4 is a flowchart showing song copy processing. First, when the display unit 17 displays a prompt to specify the copy source song, the user specifies the song A shown in FIG. 3A in response to the prompt (S1).

In the first processing, as shown in FIG. 3B, the start point (L: m:
Start point of cluster including (n) (L: 0: 0)
Is searched (S2), data up to a point (L + 11: last: last) separated by 12 clusters from this point is read, and this is temporarily stored in the memory 10 (S3). When an empty area on the disk 1 is searched (S4), the data stored in the memory 10 is used as the start point (H + 1: 0 :) of the cluster included in the empty area.
0), and the first part is not exactly 1
Since it is not necessary to use two clusters, as shown in FIG. 5A, addresses (H + 1 :) corresponding to the start point and stop point of the song A written in the empty area.
Write m: n, H + 12: last: last) in the UTOC area (S5).

In the second processing, as shown in FIG. 3C, the cluster start point (L + 12: 0: 0) following the data read in the first processing is searched (S).
2) The data up to a point (L + 23: last: last) separated by 12 clusters from this point is read out and temporarily stored in the memory 10 (S3).
When the start point (H + 13: 0: 0) of the cluster following the data written in the first processing is searched (S4), the data is written from this point and the start point of FIG.
As shown in (b), the address (H + 24: l) corresponding to the stop point of the data written in the empty area.
(ast: last) is written in the UTOC area (S
5).

Thereafter, the same processing is repeated (S2 to S).
6). The cluster start point (L + 12N:
When 0: 0) is searched (S4), the data is written from here, and as shown in FIG. 5C, the address (2H + 1-L: corresponding to the stop point of the song A written in the empty area: Write i: j) in the UTOC area (S5).

According to this embodiment, when the data on the disk 1 to be edited is copied to the free area, the data is divided according to the capacity of the memory 10 for temporarily storing the data, so a cheaper memory is used. Therefore, the cost can be reduced. At this time, the data recorded on the disk 1 is copied to the empty area for every integer multiple of the MD format cluster, so that it is consistent with the error correction processing unit and the copy processing is facilitated. You can also In addition, since a ⅕ compressed signal of the actual signal is recorded as data and all the copying is moved by the compressed signal, even if the transfer to and from the memory 10 and the access time are taken into consideration, it is better than copying the real signal in real time. It can be done in a short time.

In the above-described embodiment, the case where the recorded data is applied to the mini disk format which is audio data has been described, but it goes without saying that it is also applicable to the MD data format. In this case, the copy source data may be designated by mark points, for example.

[0020]

As described above, according to the present invention,
By previously copying the data on the disc to be edited to the free area on the disc, it is possible to avoid the loss of the original data when the editing fails. Therefore, even if the editing fails, the destroyed data only has to be erased, and the original data or the same data as the original remains, so that it is possible to redo again and again.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an MD system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of UTOC area information recorded on a disc.

FIG. 3 is a diagram showing a flow of signals on a disc.

FIG. 4 is a flowchart showing a song copy process.

FIG. 5 is a diagram showing an example of UTOC area information when copying a song.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk, 2 ... Spindle motor, 3 ... Magnetic recording head, 4 ... Optical pick-up, 5 ... Sending motor, 6 ... RF
Amplifier, 7 ... Servo control unit, 8 ... EFM / ACIRC encoder / decoder, 9 ... Memory controller, 10 ...
Buffer memory, 11 ... Address decoder, 12 ... Audio compression / decompression section, 13 ... D / A converter, 14 ... A / D converter, 15 ... Head drive section, 16 ... System controller, 17 ... Display section, 18 ... Operation keys, 21 ... Time code address, 22 ... Cluster address, 23 ... Sector address, 24 ... Sound group address.

Claims (2)

[Claims] 1. An MD system having a function of editing data recorded on a disc, wherein a memory for temporarily storing data to be edited recorded on the disc and data stored in the memory An MD system comprising: means for copying to an empty area on the disk; and means for executing an editing process on the data copied by this means. 2. An MD system having an editing function of data recorded on a disc, and a memory for storing data to be edited recorded on the disc at a constant amount which is an integral multiple of a cluster, A means for copying the data to be edited through the memory to the free area on the disk by a predetermined amount, and a means for executing an editing process on the data copied by the means. MD system to do.