JPH0283881A - Adding type optical disk - Google Patents

Abstract

PURPOSE:To limit the number of the musics of music data which can be written into a data recording area by writing beforehand the non-rewritable catalog information to divide a data recording area to write the music data into the areas of the prescribed number of the musics, into the lead-in areas. CONSTITUTION:An adding type optical disk 1 has a data recoding area 2 to write the music data and a lead-in area 3 to write the catalog information of the music data and the information is recorded in the same way as CD. In the area 3, the catalog information to divide the area 2 into the prescribed number of musics is written. The writing of the music data to the area 2 is executed in accordance with the catalog information of the area 3. Consequently, only the music data of the prescribed number of the musics can be written in the disk 1. Since the catalog information is written by the unevenness of the bit, rewriting cannot be performed. For this reason, the number of the musics which can be written into the area 2 cannot be changed.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a write-once optical disc in which musical sound data is written in a data recording area.

B3 Summary of the Invention The present invention provides a write-once optical disc in which musical sound data is written in a data recording area, in which non-rewritable catalog information for dividing the data recording area into areas of a predetermined number of songs is written in advance in the lead-in area. 2. Description of the Related Art Conventionally, write-once type optical discs have been developed on which musical sound data is written in a data format similar to that of compact discs (CDs).

This write-once optical disc has a data recording area in which musical tone data is written spirally in the circumferential direction, and a catalog information (T) provided on the inner circumference side of this data recording area.
A lead-in H area is provided in which OC information is written, allowing the user to write musical tone data and its catalog information only once. In the write-once optical disc, musical tone data written in the data recording area is reproduced based on the list information written in the lead-in area.

D1 Problems to be Solved by the Invention Incidentally, the above-mentioned write-once optical disc has a very large capacity of the data recording area, so that musical tone data of a large number of songs can be written therein.

However, in the above-mentioned write-once optical disc, for the purpose of simplifying the management of musical sound data written in the data recording area, for example, only a predetermined number of musical sound data can be written in the data recording area SJ. Things are also needed.

Therefore, the present invention was proposed in view of the above-mentioned circumstances,
It is an object of the present invention to provide a write-once optical disc with a novel configuration that can limit the number of musical tone data that can be written in a data recording area.

E6 Means for Solving the Problems In order to achieve the above-mentioned object, the write-once optical disc according to the present invention divides the data recording area into a data recording area in which musical tone data is written and an area having a predetermined number of songs. and a lead-in area in which non-rewritable catalog information is written.

F1 Effect In the write-once optical disc according to the present invention, non-rewritable catalog information that divides the data recording area into which musical tone data is written into areas of a predetermined number of songs is written in advance in the lead-in area. As a result, only musical tone data for a predetermined number of songs can be written in the data recording area according to the list information written in the lead-in area.

Further, since the catalog information in the lead-in area cannot be rewritten, the number of songs that can be written in the data recording area cannot be changed.

G. EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to FIG.

In FIG. 1, the write-once optical disc 1 of this embodiment has a data recording area 2 in which musical tone data is written in a spiral shape in the circumferential direction, and a data recording area 2 provided on the inner circumferential side of this data recording area 2 in which the musical tone data is written. Compact disc (CD)
Information is now recorded using a deformer similar to

Of these, in the data recording area 2, absolute time information and synchronization information are recorded in advance on predetermined tracks formed by a write-once optical recording medium, for example, by a wobbling method, and based on this information, The user can write musical tone data only once.

Further, in the lead-in area 3, catalog information for dividing the data recording area 2 into a predetermined number of songs is written in advance in the form of focus irregularities. That is, the lead-in area 3
As shown in Table 1, the absolute time at which each side starts in order for all the songs written in the data recording area 2 (for example, for the first song, [^1A2 minutes to 3A4 seconds A5A6 frames]) and , the absolute time when the last song (Nth song) ends ((0,0□ minutes 0,04 seconds 0,06
frame]) is written as catalog information.

Table 1 As a result, musical tone data is written into the data recording area 2 in accordance with the list information in the lead-in area 3. Therefore, only musical tone data for a predetermined number of songs (N songs) can be written on the write-once optical disc I. Moreover, since the above-mentioned list information is written using the unevenness of the pits, it cannot be rewritten. For this reason, the number of songs that can be written in the data recording area 2 cannot be changed. Therefore, in the write-once optical disc 1 of this embodiment, the data recording area 2
It is possible to limit the number of musical tone data that can be written to a predetermined number (N songs).

Note that if the actual performance time of the musical tone to be recorded is shorter than the time preset by the above catalog information, an area will be created in which musical tone data will not be written after the performance is finished; Silent data may be written after recording. Or record unrecorded data.
Reproduction R equal to when silent data is reproduced from 1 distribution area 2
If a write-once optical disc 1 from which an F signal can be obtained is used, good playback can be achieved even if writing of musical tone data is stopped at the end of the performance. Furthermore, by having the data recording device record a control signal indicating that the musical tone data of the song has ended at the end point of the performance, the data playback device can detect this during playback and start repeating or starting the next song. It is also possible to enable it to start.

H2 Effects of the Invention In the write-once optical disc according to the present invention, non-rewritable catalog information that divides the data recording area into which musical tone data is written into areas of a predetermined number of songs is written in advance in the lead-in area.

As a result, only musical tone data for a predetermined number of songs can be written in the data recording area according to the list information written in the lid-in area. Further, since the catalog information in the lead-in area cannot be rewritten, the number of songs that can be written in the data recording eMM cannot be changed.

Therefore, in the write-once optical disc, it is possible to limit the number of musical sound data that can be written in the data recording area, and for example, it is possible to simplify the management of recorded musical sound data.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view for explaining a write-once optical disc to which the present invention is applied. 1...Writable optical disc 2...Data recording area 3...Lead-in area

Claims (1)

[Claims] A write-once optical disc comprising a data recording area in which musical tone data is written, and a lead-in area in which non-rewritable catalog information is written that divides the data recording area into areas of a predetermined number of songs.