JP3281899B2 - Mini disc recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mini disc recorder.

[0002]

2. Description of the Related Art A new system is being developed for an information record carrier for recording and reproducing digital signals and a device therefor, aiming at miniaturization and extension of recording / reproduction time. For example, a disk having a diameter of 64 mm (hereinafter referred to as a mini disk) housed in a cartridge has been reduced in size,
2. Description of the Related Art There is a mini-disc recorder which adopts a technique of obtaining a recording and reproducing time comparable to that of a compact disc by compressing data, and using a semiconductor memory as a data buffer to improve vibration resistance during reproduction. For example, JAS Jour
nal, Mini Di, described in the August 1991 issue.
It is a sc system.

[0003]

In the mini-disc recorder, when editing such as replacement, division, connection, and erasure of music, replacement, division, connection, and erasure of audio data actually recorded on the optical disk are performed. UTOC (USER TAB) recorded on the optical disc without performing
LE OF CONTENTS) You can edit by changing the data. UTOC data is management data for managing recording data. However, if a user deletes a song at the time of editing and then learns that the edited content is incorrect, the UTOC is already recorded even though the deleted song is actually recorded on the optical disc. Since the data has been changed, there is a disadvantage that the deleted song must be recorded again in order to restore the deleted song.

The present invention takes advantage of the fact that UTOC data read immediately after an optical disk is mounted is stored in a semiconductor memory for a compressed data buffer until the optical disk is ejected from a mini-disc recorder. It is an object of the present invention to provide a mini-disc recorder which can return UTOC data to the state before the editing when the editing contents are mistaken even after editing the UTOC data.

[0005]

According to a first aspect of the present invention, there is provided an audio data recording apparatus in which an audio data area in which audio data is recorded and a management data area in which management data for managing the audio data are recorded are recorded on an optical disk. A mini disc recorder that records management data and reproduces audio data recorded in the audio data area of the optical disk based on the management data recorded in the management data area of the optical disk. Reading means for reading data, storage means for storing management data read by the reading means in a plurality of storage areas, changing means for changing management data stored in the storage area, and management changed by the changing means Recording means for recording data on an optical disc; and management data changed by the changing means. Recognizing means for recognizing a request for further cancellation, and control means for controlling the changing means, the recording means, and the recognizing means, wherein the control means responds to the request for canceling the change recognized by the recognizing means. Based on the management data stored in the plurality of storage areas, control is performed to select management data to be recorded on the optical disc by the recording means.

[0006]

According to the present invention, the UTOC data read immediately after the optical disc is mounted on the mini disc recorder is stored in the first storage area and the second storage area of the recording means.
UTOC stored in the second storage area by an editing function or the like
Even after editing the data, if an error in the editing is recognized, the UTOC data before the editing can be returned to the state before the editing by reading the UTOC data before the editing from the first storage area.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a mini-disc recorder according to the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of the mini-disc recorder of the present embodiment. FIG. 2 is a flowchart illustrating the operation of the mini-disc recorder of the present embodiment. The RF amplifier 3 amplifies a signal read by the optical pickup 2 and recorded on the mini disc 1. The servo circuit 4 controls a motor for causing the optical pickup 2 to follow the signal of the mini disc 1. The slide motor 5 moves the optical pickup 2 in the radial direction of the mini disc 1. The spindle motor 6 rotates the mini disc 1. The address recorder 7 reads an address recorded on a disc. EFM (Eight to Fourtee
n Modulation) / ACIRC (Advanced Cross Interle
The ave Reed-Solomon Code) decoder 8 decodes the address of the mini disc 1 by solving the ACIRC of the EFM signal recorded on the disc. The semiconductor memory control circuit 9 manages addresses of the semiconductor memory. The audio compression decoder 10 expands the compressed data. The D / A converter 11 converts a digital signal into an analog signal. The A / D converter 12 converts an input analog signal into a digital signal. The audio compression encoder 13 compresses data. Semiconductor memory 14
Are the first RAM area 14a and the second RAM area 1
4b and a third RAM area 14c. First R
The AM area 14a and the second RAM area 14b store information of the UTOC read from the mini disc 1, respectively. The third RAM area 14c stores compressed data.

[0008] An EFM / ACIRC encoder 15 adds an ACIRC to the compressed data to generate an EFM signal. The head drive circuit 16 drives the recording head 17 based on the EFM signal from the EFM / ACIRC encoder 15 to generate a recording magnetic field, and records the signal on the mini disc 1. The key input unit 19 instructs ejection of the mini disc. Further, the key input unit 19 instructs editing of the UTOC information stored in the second RAM area 14b. The display device 18 is provided with a second RA
The editing contents of the UTOC information stored in the M area 14b are displayed. The system control microcomputer 20 controls the entire system of the display device 18, the key input unit 19, and the mini disc recorder.

Next, the operation of the mini-disc recorder of this embodiment will be described with reference to the flowchart shown in FIG.
When the mini disc 1 is mounted on the turntable (not shown) (step S1), the optical pickup 2 is controlled by the system control microcomputer 20 via the servo circuit 4 to read the UTOC data of the mini disc 1 (step S2). . Next, the optical pickup 2
UTOC data read by the RF amplifier 3 and EFM /
The data is stored in the first RAM area 14a and the second RAM area 14b of the semiconductor memory 14 via the ACIRC decoder 8 (step S3). Next, when there is a request from the key input unit 19 to edit the UTOC data of the mini disc 1 (step S4), the key input unit 2
According to the editing instruction by the user in the U of the second RAM area 14b.
The TOC data is changed (step S5), and the changed second
The UTOC data in the RAM area 14b is written to the mini disk 1 (step S6).

After the editing operation is completed, the key input unit 1
9, when the ejection of the mini-disc 1 is instructed (step S7), whether or not the editing is completed correctly is confirmed by the display on the display device 18 via the system control microcomputer 20, and is erased by mistake at the time of editing. If the user notices that the tune that should not be erased, the key input unit 19 issues a request to return the edited UTOC data of the mini disc 1 to the state at the time of mounting (step S8). In response to the request from the key input unit 19 to return the UTOC data to the state at the time of mounting, the system control microcomputer 20 writes the UTOC data read at the time of mounting the mini disk 1 on the mini disk 1 (step S9). This makes it possible to restore the contents of the UTOC once changed by the editing operation. Therefore, for example, even if a song is erroneously erased by an editing operation, the state before the editing, in which the song is erased, can be returned before the mini-disc 1 is ejected.

As described above, the mini-disc recorder of the present embodiment has a means for reading UTOC data recorded on the mini-disc 1, a storage means for storing the read UTOC data in the semiconductor memory, and a method for storing the stored UTOC data. It comprises a changing means for changing, a recording means for recording the changed UTOC data on the mini-disc 1, and a recognizing means for recognizing a request for canceling the changed UTOC data.

Immediately after the mini-disc 1 is mounted on the mini-disc recorder, the UTOC data read by the reading means is stored in the first RAM area 14a and the second RAM area 14b of the semiconductor memory by the storage means. In the first RAM area 14 until the mini disc recorder ejects the mini disc 1.
Save the stored contents of a. Second RAM by changing means
By changing the storage contents of the area 14b and recording the changed UTOC data on the mini-disc 1 by the recording means, after the UTOC data on the mini-disc 1 has been changed, the change by the changing means is incorrect. When the recognizing unit recognizes the change request, the recognizing unit recognizes the request for canceling the changed UTOC data, so that the UTOC data in the first RAM area 14a stored by the storing unit is recognized.
By recording the data on the mini-disc 1 again by the recording means, the UTOC data recorded on the mini-disc 1 can be returned to the state before the change by editing.

The mini-disc recorder of the present embodiment uses a semiconductor memory 14 for a compressed data buffer normally provided in a mini-disc recorder system as a UTO.
It may be used as a memory for restoring the C data.
By doing so, the UTOC is independent of the storage capacity of the system control microcomputer 20.
Since data can be restored, it is not necessary to newly add a memory dedicated to editing. Furthermore, when editing UTOC data, the UTO data read immediately after the
Since the C data is stored in the semiconductor memory 14 and the UTOC data stored in the semiconductor memory 14 is written to the mini-disc 1 via the system control microcomputer 20 by operating the key input unit 19, the operation is simple. Can be re-edited.

[0014]

According to the present invention, the UTOC data read immediately after the optical disk is mounted is stored in the semiconductor memory for the compressed data buffer until the optical disk is ejected from the mini disk recorder. It is possible to provide a mini-disc recorder that can return the UTOC data to the state before the editing when the editing contents or the like are found, even after editing the UTOC data by the editing function or the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing hardware of a mini disc recorder according to one embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the mini-disc recorder of the embodiment.

[Explanation of symbols]

 Reference Signs List 1 mini disc 2 optical pickup 3 RF amplifier 4 servo circuit 5 slide motor 6 spindle motor 7 address decoder 8 EFM / ACIRC decoder 9 semiconductor memory control circuit 10 audio compression decoder 11 D / A converter 12 A / D converter 13 audio compression encoder 14 Semiconductor memory 14a First RAM area 14b Second RAM area 14c Third RAM area 15 EFM / ACIRC encoder 16 Head drive circuit 17 Recording head 18 Display device 19 Key input unit 20 System control microcomputer

Claims (1)

(57) [Claims] An audio data and management data are recorded on an optical disk having an audio data area in which audio data is recorded and a management data area in which management data for managing the audio data is recorded, and recorded in a management data area of the optical disk. A mini disc recorder that reproduces audio data recorded in an audio data area of an optical disk based on the obtained management data, wherein: a reading means for reading the management data recorded in the management data area of the optical disc; Storage means for storing management data in a plurality of storage areas; changing means for changing the management data stored in the storage area; recording means for recording the management data changed by the changing means on an optical disc; Recognition means for recognizing a request for cancellation of changed management data A control unit that controls the change unit, the recording unit, and the recognition unit, wherein the control unit is stored in the plurality of storage areas based on a request for canceling the change recognized by the recognition unit. A mini-disc recorder, which controls to select management data to be recorded on an optical disc by the recording means from the management data.