JP2002042348A5

JP2002042348A5 - Optical disc, optical disc apparatus, optical disc reproducing apparatus, information reproducing method

Info

Publication number: JP2002042348A5
Application number: JP2000224724A
Authority: JP
Filing date: 2000-07-26
Publication date: 2005-06-09
Anticipated expiration: 2020-07-26

Claims

An optical disc on which information can be recorded on a spiral track,
An index header recorded by embossing, the address data of each track being formed along the radial direction of the disc so as to interrupt the spiral track;
The spiral track has a header field for recording address data and a recording field having a data field for recording the information,
Address data of the recording field is recorded as address data of the header field,
When the recording field is recorded crossing the index header, the recording field is recorded as two sub-recording fields crossing the index header,
The same address data is recorded in each header field of the two sub recording fields, and
An optical disc characterized in that the recording field is recorded or reproduced at a constant linear velocity.

The recording field is configured in sync frame units, and
2. The optical disc according to claim 1, wherein when the recording field intersects the index header, an area which is an area before the next index header and which is shorter than a sync frame unit is adjusted.

An optical disk apparatus for recording information on an optical disk capable of recording information on a spiral track, comprising:
Address data is recorded on the spiral track on an optical disc having an index header recorded by embossing formed along the radial direction of the disc to cut off the spiral track so that the address data of each track is cut off. Recording means for recording at a constant linear velocity a recording field having a header field and a data field for recording the information;
When the recording means records the recording field crossing the index header, the index header is recorded as two sub recording fields crossing each other, and each header field of the two sub recording fields is the same. An optical disk apparatus characterized in that the address data of the above is recorded.

The recording means may use information different from the information.
There is a wobble of the spiral track starting from the index header, and an area located in front of the index header that appears next and is recorded in an area having a length less than one cycle of the wobble An optical disk apparatus according to claim 3, characterized in that:

The recording means may use information different from the information.
The recording field is configured in sync frame units, and
4. The optical disc apparatus according to claim 3, wherein when the recording field intersects the index header, the recording is performed in an area before the next index header and shorter than a sync frame unit.

An optical disk apparatus for reproducing information from an optical disk capable of recording information on a spiral track, comprising:
The optical disc is
An index header recorded by embossing, the address data of each track being formed along the radial direction of the disc so as to interrupt the spiral track;
The spiral track has a header field for recording address data and a recording field having a data field for recording the information,
Address data of the recording field is recorded as address data of the header field,
When the recording field is recorded crossing the index header, the recording field is recorded as two sub-recording fields crossing the index header,
The same address data is recorded in each header field of the two sub recording fields,
An optical disk reproducing apparatus comprising: reproducing means for reproducing the information from the optical disk at a constant linear velocity.

The spiral track of the optical disc has wobbles, and
7. The optical disc apparatus according to claim 6, wherein the reproducing means reproduces the recording field at a constant linear velocity by using the wobble of the optical disc.

An information reproducing method for reproducing information from an optical disc capable of recording information on a spiral track, comprising:
The optical disc is
An index header recorded by embossing, the address data of each track being formed along the radial direction of the disc so as to interrupt the spiral track;
The spiral track has a header field for recording address data and a recording field having a data field for recording the information,
Address data of the recording field is recorded as address data of the header field,
When the recording field is recorded crossing the index header, the recording field is recorded as two sub-recording fields crossing the index header,
The same address data is recorded in each header field of the two sub recording fields,
An information reproducing method comprising the step of reproducing the information from the optical disc at a constant linear velocity.

The spiral track of the optical disc has wobbles, and
9. The information reproducing method according to claim 8, wherein the reproducing step reproduces the recording field with a constant linear velocity by using the wobble of the optical disc.