JP3466508B2 - Magneto-optical disk recording / reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical disk recording / reproducing apparatus for recording / reproducing a rewritable magneto-optical disk, a so-called mini disk, and more particularly to a display system using characters such as a disk title and a music title.

[0002]

2. Description of the Related Art A mini disk (MD) known as a rewritable magneto-optical disk has a recordable area outside the pit information recording area on the inner peripheral side. The recordable area has a user's tok area (U-TOC) and a program area. There is no pit here, but a groove that guides the track.
Is dug and records information along this groove.

The groove is undulated in a waveform, and the average frequency of a signal generated by the undulation (wobble) is 22.
The rotation of the disc is controlled so that the frequency becomes 05 kHz.
Further, the absolute time (address information) from the recording start position is FM-modulated and recorded in this wobble.

Recording is performed by magnetization of the magnetic film. That is, after heating the magnetic film above the Curie point by the laser spot and applying a magnetic field that inverts according to the signal,
When cooled, a signal is recorded on the magnetic film as a change in the magnetization direction. Such recording can be performed on a portion that has already been recorded. That is, overwriting is possible.

Although any song is recorded in the recordable area, the management information of each recorded song is recorded in the U-TOC. Addresses indicating the start and end times of each song are recorded in sector 0 of the U-TOC, song names are recorded in ASCII code in sector 1, and song names are shifted in sector 4 JIS code or ISO-8859-1 code. Recorded in.

In addition to the above-mentioned rewritable mini disc, a so-called recordable mini disc, there is a premastered mini disc in which the same pit information recording as that of the recordable mini disc is performed in all areas. In the premastered mini disc, the management information of each song is recorded in the TOC on the inner circumference side. Addresses indicating the start and end times of each song are recorded in the sector 0 of the TOC, the disc title and the song name are recorded in the ASCII code in the sector 1, and the disc title and the song name are recorded in the sector 4 in the shift JIS code or It is recorded with the ISO-8859-1 code.

Conventionally, in a magneto-optical disc recording / reproducing apparatus for recording or reproducing such a recordable mini disc and a premastered mini disc, a character is recorded in sector 1 of the TOC or U-TOC on the disc.
If the data is recorded, the character of sector 1 is displayed, and then the time display mode in which the address is converted and displayed is automatically switched to the time display mode.

When displaying characters in other sectors, the display switching key is pressed to switch the display mode. However, sector 4 is shift J
Since it is recorded in the IS code or the ISO-8859-1 code, the display and the display circuit of these characters are large in scale, so that the display of the sector 4 is not supported.

[0009]

In the above-mentioned conventional magneto-optical disk recording / reproducing apparatus, even if the character of the sector is displayed by pressing the display switching key in order to display the character of the desired sector, when the disk is replaced or the power source is changed. When turned off, the display mode was cleared and the display mode had to be changed again by the display switching key, which was inconvenient.

The character recorded in the sector 4 can display a plurality of languages, so that the user can display the character in the sector 4.
There was a request to preferentially see the characters recorded in.

The present invention has been made in view of the above points, and an object thereof is to set the priority display of the sector to be displayed by the priority display key so that the disk is replaced or the power is turned off. It is an object of the present invention to provide a magneto-optical disk recording / reproducing apparatus in which a priority display once set is performed even after being recorded.

[0012]

A magneto-optical disk recording / reproducing apparatus according to the present invention comprises TOC information or UT of a disk.
A memory for storing OC information, a priority display key for designating character data of a sector in the TOC or U-TOC to be preferentially displayed, a display section for displaying the character data of the sector, and the character data And a control unit that controls the display of the character data.The control unit determines whether character data exists in the sector designated by the priority display key, and if the character data exists, the character data is designated. The character data of the sector is displayed on the display unit, and when the character data does not exist, the character data is not displayed and only a predetermined display operation is performed.

Further, in the magneto-optical disk recording / reproducing apparatus of the present invention, the predetermined display operation is time conversion display.

[0014]

According to the magneto-optical disk recording / reproducing apparatus of the present invention, when the displayable character data of a plurality of sectors in the TOC or U-TOC is reproduced, the character data of each sector is given priority. The priority display key to be displayed is set so that the native language of each country is displayed first, which makes it easy for the user to understand.Also, the set state is maintained and after the disk is replaced or the power is turned off. It is convenient because there is no need to set it again later.

[0015]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an MD recording / reproducing apparatus which is an embodiment of the present invention. In the figure, 1 is an MD disc. The MD disk 1 is rotated by a disk motor 2 and is overwritably recorded by spot heating by an optical pickup 3 and a modulation magnetic field applied by a magnetic field modulation head 4.

The MD disk 1 also reflects the laser beam emitted from the optical pickup 3, and the reflected light is received by the optical pickup 3 to reproduce a recording signal. Reference numeral 5 is a recording / reproducing signal processing unit. During recording, the recording signal applied to the recording input terminal 8 is supplied to the recording / reproducing signal processing unit 5 after being converted into a digital signal by the A / D converter 6, and the recording / reproducing signal processing unit 5 modulates the signal. Then, signal processing is performed and a modulation signal is applied to the magnetic field modulation head 4.

At the time of reproduction, the recording / reproduction signal processing unit 5 is M
The reproduced signal read from the D disc 1 is demodulated, signal processed, and output to the D / A converter 7. The D / A converter 7 converts the input signal into an analog signal and outputs it to the audio amplifier. Further, the recording / reproducing signal processing unit 5 performs servo control on the disk motor 2 and the optical pickup 3 via a servo circuit (not shown).

Reference numeral 9 is a system controller. The system controller 9 is composed of a microcomputer including a ROM, a RAM and an input / output interface, operates according to a program written in the ROM,
Further, the external data required from the connected key operation unit 10 or display unit 11 is read and decoded, and the RAM is also used.
Is used as a working memory to perform arithmetic processing, and output the processed data to a recording / reproducing signal processing unit or the like as necessary to control the recording / reproducing operation.

The key operation unit 10 is for operating the apparatus, and in addition to the normal play key, record key, stop key, A
SCII code, shift JIS code, ISO-885
There is a priority display key for each 9-1 code, and only one of these priority display keys can be held in a depressed state. The display unit 11 displays a character according to a command from the system controller 9.

Next, the character display operation of this apparatus will be described with reference to FIG. The character display operation is performed in a state where the TOC and U-TOC data is read from the disk and stored in the RAM.

First, in steps S1, S2 and S3, it is determined whether or not the priority display state is set. If the ASCII code is the priority display state, the sector code is decoded when there is non-zero data. Is displayed (S16), and then time conversion display (S17) is performed. In other cases, the time conversion display is performed without displaying the song title and the like. (S1, S4, S15, S17) In the case of priority display of shift JIS code or ISO-8859-1 code, the character of the priority display code is displayed only when those codes other than 0 are present,
In other cases, the time conversion display is performed without displaying the song title and the like. (S2, S5, S7, S8, S9, S3, S
6, S10, S11, S12, S17) If priority display is not designated, it is first determined in step S13 whether or not sector 4 is used. When the sector 4 is used, the character is displayed when the shift JIS code or the ISO-8859-1 code has non-zero data, and in other cases, the time conversion display is performed without displaying the song title and the like. (S1
4, S8, S9, S10, S11, S12, S17) If priority display is not specified and sector 4 is not used, the ASCII code is decoded when sector 1 has non-zero data. It is displayed. In other cases, the time conversion display is performed without displaying the song name and the like. (S15, S16, S17) An example of such a display is shown in FIG. In this way, when the priority display is not designated, the shift JIS code is displayed with priority, so that the display is easy for the Japanese to understand.

The operation of displaying the disc title immediately after mounting the disc or displaying the song name before playing each song has been described above. However, if the system controller 9 has not instructed reproduction by the key operation unit 10 after loading the disc, the disc After displaying the title, stop and
If reproduction is instructed, the time title is displayed after displaying the title of each song.

Further, the system controller 9 displays the contents of the displayed time, the title of the sector 1, the title of the sector 4, and the recording date of the sector 2 by the display mode switching key of the key operation unit 10. Do as needed.

[0024]

[0025]

According to the magneto-optical disk recording / reproducing apparatus of the present invention, by providing the character priority display key, for example, Japanese (shift JIS code) characters are preferentially displayed in Japan. Since it is possible to display characters other than Japanese (Shift JIS code), it is easier to use.

[Brief description of drawings]

FIG. 1 is a block diagram showing an MD recording / reproducing apparatus that is an embodiment of the present invention.

FIG. 2 is a flowchart showing a character display operation of the MD recording / reproducing apparatus.

FIG. 3 is a diagram showing a display example of a display unit of the same MD recording / reproducing apparatus.

[Explanation of symbols]

1 MD disc 2 disk motor 3 optical pickup 4 Magnetic field modulation head 5 Recording / playback signal processor 6 A / D converter 7 D / A converter 8 Recording input terminal 9 System controller 10 key operation part 11 Display

Continuation of front page (56) References JP-A-6-332485 (JP, A) JP-A-6-243666 (JP, A) JP-A-5-224683 (JP, A) JP-A-4-13288 (JP , A) JP-A-1-232573 (JP, A) JP-A-1-138669 (JP, A) JP-A-62-259279 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) G11B 27/34 G11B 27/10

Claims (2)

(57) [Claims] 1. TOC information or U-TOC of a disc
A memory for storing information; a priority display key for designating character data of a sector in the TOC or U-TOC to be preferentially displayed; a display section for displaying the character data of the sector; And a control unit for controlling the display, wherein the control unit determines whether or not character data exists in the sector designated by the priority display key, and if the character data exists, the designated data is designated. Display the character data of the sector on the display unit,
If character data does not exist, the character
A magneto-optical disk recording / reproducing apparatus characterized in that only a predetermined display operation is performed without displaying data. 2. The magneto-optical disk recording / reproducing apparatus according to claim 1, wherein the predetermined display operation is a time conversion display.