JP3085183B2 - MD system - Google Patents

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 most suitable for editing recorded data such as punch-in / out, ping-pong, overdub, and the like.

[0002]

2. Description of the Related Art Conventionally, as a method of editing music data recorded on a storage medium without destroying the original music data, H
Non-destructive editing by a D recorder (Hard Disc recorder) is known. This method takes advantage of the features of the high-speed transfer rate and random access of the HDD. When editing a previously recorded song such as punch-in / out, ping-pong, overdub, etc., the data of the original song is deleted. A new editing signal is written into a new empty area while leaving the area, and finally, a new edited song is created by managing the address. As a result, even if the editing fails, only the portion of the new edit signal needs to be erased, and the original portion remains.

[0003]

On the other hand, in the MD, since the transfer rate is not high, as the number of channels increases, the editing signal written in a new area of an arbitrary channel in the music becomes part of the original music. It is difficult to make it seemingly one song in connection with this. Therefore, in the case where such editing is attempted in the MD system, a method of directly editing the original data and replacing the original data with a new editing 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 which can avoid loss of original data when editing fails.

[0005]

[0006]

According to an MD system according to the present invention, an MD system having a function of editing data recorded on a disk stores an integral number of clusters as a fixed amount as one copy unit data. A readable memory, and the data to be edited recorded on the disk via the memory is copied for each copy unit data to a free area on the disk as a compressed signal, and the first copy unit Discover an address corresponding to the copy source of the start point at the time of data copying
Writing the UTOC area on the click, at the time of the last of said copy unit data copy and copy processing means for writing an address corresponding to the endpoints of the copy source to the UTOC area on the disc, the editing subject is copied with the copying process means Edit processing means for executing edit processing on the data.

According to the MD system of the present invention, the data on the disk to be edited is copied in advance to a free area on the disk, so that the loss of the original data when the editing fails can be avoided. . For this reason, even if the editing fails, the destroyed data only needs to be erased, and the original data or the same data as the original remains.

According to another MD system of the present invention, data on a disk to be edited is divided and copied to a free area, so that the capacity of a 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 disk is copied to the free area for each integral multiple of the cluster in the MD format, so that the data is consistent with the error correction processing unit and the copy processing is 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 a 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 disk 1 by a feed motor 5. The read output of the optical pickup 4 is amplified by a high frequency (RF) amplifier 6 and supplied to a servo controller 7. The servo controller 7 executes the rotation control of the spindle motor 2, the feed control of the feed motor 5, and the focus / tracking control of the optical pickup 4 based on the pickup output.

The reproduction system of this MD system is configured 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 an encoder / decoder 8, where it is decoded by an error correction method based on ACIRC, and is demodulated from 14-bit data to 8-bit data. Is 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 stored in the memory 10 is appropriately read out by the memory controller 9,
After that, it is D / A converted by the D / A converter 13 and output as a reproduced audio output signal.

The recording system of the MD system is configured 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.
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, and is supplied to the head drive unit 15 after being subjected to EFM modulation and ACIRC encoding. The magnetic recording head 3 is driven by the head driving unit 15 to record necessary data on the disk 1.

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 audio data recorded on the disk 1. And a plurality of operation keys 18 for designating the same. The system controller 16 has a function of dividing the data on the disc 1 into blocks according to the input from the operation keys 18 and copying the data. A function for recording or searching for this address based on a specified reproduction order;
A function of outputting an IDI message and a tempo clock TM1.

FIG. 2 shows the UTO recorded on the disk 1.
It is a figure showing an example of C area information. UT of disk 1
In the OC area, a time code address 21 of data recorded on the disc 1 is recorded. The time code address 21 includes 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, addresses (0: 0: 0, 100: 20: 30) and (100) corresponding to the start point and stop point of each of the tracks from track number 1 to n in advance. : 2
0:31, 200: 50: 10),..., (L: m: n,
H: i: j),... Are respectively recorded.

Next, a description will be given of song copying performed by the MD system having the above-described configuration. Now, memory 1
0 is 1 MB and the data on disk 1 is 1
Consider a case where a block is divided into two clusters and copied. FIG. 3 is a diagram showing a signal flow on the disk 1, and FIG. 4 is a flowchart showing a song copy process. First, when a prompt for designating a copy source song is displayed on the display unit 17, the user designates the song A shown in FIG. 3A in response to the prompt (S1).

In the first process, as shown in FIG. 3B, the start point (L: m:
Start point of cluster including n) (L: 0: 0)
Is searched (S2), and data up to a point (L + 11: last: last) 12 clusters away from this point is read out and temporarily stored in the memory 10 (S3). When a free 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 free area.
0) and the first part is always exactly 1
Since two clusters are not enough, as shown in FIG. 5A, addresses (H + 1:
m: n, H + 12: last: last) is written in the UTOC area (S5).

In the second process, as shown in FIG. 3C, the start point (L + 12: 0: 0) of the cluster following the data read in the first process is searched for (S
2) The data up to a point (L + 23: last: last) 12 clusters away from this point is read 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 here, and the data shown in FIG.
As shown in (b), the address (H + 24: l) corresponding to the stop point of the data written in the empty area
(last: last) in the UTOC area (S
5).

Hereinafter, 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 there, and as shown in FIG. 5C, the address (2H + 1-L: i: j) is written in the UTOC area (S5).

According to this embodiment, when data on the disk 1 to be edited is copied to a free area, the data is divided according to the capacity of the memory 10 for temporarily storing data, so that a cheaper memory is used. And cost can be reduced. At this time, since the data recorded on the disk 1 is copied to the free area for each integral multiple of the cluster in the MD format, the data is consistent with the error correction processing unit and the copy processing is facilitated. Can also. Further, since a signal of 1/5 compression of the real signal is recorded as data, and all copies are moved by the compressed signal, even if the transfer to and from the memory 10 and the access time are taken into consideration, the real-time signal is copied rather than copied. It can be done in a short time.

In the above-described embodiment, the case where the recorded data is applied to the mini-disc format in which the data is audio data has been described. However, it is needless to say that the present invention can also be applied to the MD data format. In this case, the copy source data may be specified by, for example, a mark point.

[0020]

As described above, according to the present invention,
By copying data on the disc to be edited to a free area on the disc in advance, loss of the original data when the editing fails can be avoided. For this reason, even if the editing fails, the destroyed data only needs to be erased, and the original data or the same data as the original remains.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating 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 signal flow on a disk.

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

FIG. 5 is a diagram showing an example of UTOC area information at the time of song copying.

[Explanation of Symbols] 1 disk, 2 spindle motor, 3 magnetic recording head, 4 optical pickup, 5 feed 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 / expansion unit, 13 D / A converter, 14 A / D converter, 15 head drive unit, 16 system controller, 17 display unit, 18 display unit Operation keys, 21: time code address, 22: cluster address, 23: sector address, 24: sound group address.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-153273 (JP, A) JP-A-9-161454 (JP, A) JP-A-5-217288 (JP, A) JP-A-5-217288 274678 (JP, A) JP-A-5-314726 (JP, A) JP-A-7-296560 (JP, A) JP-A 8-297918 (JP, A) JP-A 5-234331 (JP, A) JP-A-6-119758 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 27/00-27/08 G11B 11/105 586 G11B 20/10

Claims (1)

(57) [Claims] 1. An MD system having an editing function of data recorded on a disk, comprising: a memory capable of storing and reading an integer number of clusters as a fixed amount as one copy unit data; The data to be edited recorded on the disk is copied for each copy unit data to a free area on the disk with a compressed signal as it is, and the first copy unit data corresponds to the start point of the copy source at the time of copy. The address is written in the UTOC area on the disk, and at the time of the last copy of the copy unit data, the address corresponding to the copy source endpoint is written to the disk.
An MD system comprising: copying processing means for writing data in an upper UTOC area; and editing processing means for executing editing processing on the data to be edited copied by the copying processing means.