Optical information recording medium and optical information recording medium reproducing device

Patent metadata

Field	Value
Publication number	US-9966098-B2
Application number	US-201515321821-A
Country	US
Kind code	B2
Filing date	Jun 9, 2015
Priority date	Aug 29, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

Provided is an optical information recording medium including: a continuously wobbling groove formed in advance by a CAV or a zone CAV. Information is allowed to be recorded on the groove and a land adjacent to the groove, address information is recorded by modulating the wobble, the address information includes a sync pattern indicating a position of the address information and address data, and the sync pattern includes a plurality of first wobble patterns and a second wobble pattern between the first wobble patterns, and at least part of intervals of the first wobble patterns are set to unequal intervals.

First claim

The invention claimed is:

1. An optical information recording medium comprising:
a continuously wobbling groove formed in advance by a constant angular velocity (CAV) or a zone CAV,
wherein information is allowed to be recorded on the groove and a land adjacent to the groove,
address information is recorded by modulating the wobble,
the address information includes a sync pattern indicating a position of the address information and address data, and
the sync pattern includes a plurality of first wobble patterns and a second wobble pattern between the first wobble patterns, and at least part of intervals of the first wobble patterns are set to unequal intervals,
wherein the at least part of the intervals decrease by 1 normal wave length (NWL) at a time.

2. The optical information recording medium according to claim 1 , wherein the second wobble pattern is a pattern in which the first wobble pattern is phase-modulated.

3. The optical information recording medium according to claim 1 , wherein the first wobble pattern is an minimum shift keying (MSK) mark, and the second wobble pattern is a monotone.

4. The optical information recording medium according to claim 1 , wherein the at least part of the intervals of the first wobble patterns change in stages by adding or subtracting a fixed number.

5. The optical information recording medium according to claim 4 , wherein the at least part of the intervals of the first wobble patterns are set to become smaller with increasing proximity to the address data.

6. The optical information recording medium according to claim 5 , wherein the at least part of the intervals are set such that interval between the first wobble pattern in a front-end position and the first wobble pattern in a second position is 35 normal wave lengths (NWLs).

7. The optical information recording medium according to claim 1 ,
wherein a prescribed number of second wobble patterns are interposed between a front-end position of the address information and a position of the first wobble pattern in the front-end position, and
a prescribed number of second wobble patterns are interposed between a last position of the address information and a position of the first wobble pattern in the last position.

8. An optical information recording medium reproducing device configured to:
optically reproduce an optical information recording medium,
the optical information recording medium including
a continuously wobbling groove formed in advance by a constant angular velocity (CAV) or a zone CAV,
in which information is allowed to be recorded on the groove and a land adjacent to the groove,
address information is recorded by modulating the wobble,
the address information includes a sync pattern indicating a position of the address information and address data, and
the sync pattern includes a plurality of first wobble patterns and a second wobble pattern between the first wobble patterns, and at least part of intervals of the first wobble patterns are set to unequal intervals, wherein the at least part of the intervals decrease by 1 normal wave length (NWL) at a time;

detect the first wobble patterns to detect the sync pattern; and
decode the address data by the detection of the sync pattern,
wherein the optical information recording medium reproducing device comprises:
a wave detection circuit configured to generate a wave detection output based on the first wobble pattern and a reference wave;
an accumulation circuit configured to accumulate outputs of the wave detection circuit;
a series connection of a plurality of delay circuits to which an output of the accumulation is supplied and in which respective amounts of delay are set so as to simultaneously detect the plurality of first wobble patterns included in the sync pattern;
an adder configured to add a plurality of accumulation outputs extracted from the series connection of delay circuits; and
a threshold assessment circuit configured to perform threshold assessment on an output of the adder.

9. The optical information recording medium reproducing device according to claim 8 , wherein the second wobble pattern is a pattern in which the first wobble pattern is phase-modulated.

10. The optical information recording medium reproducing device according to claim 8 , wherein the first wobble pattern is an minimum shift keying (MSK) mark, and the second wobble pattern is a monotone.

11. The optical information recording medium reproducing device according to claim 8 , wherein the at least part of the intervals of the first wobble patterns change in stages by adding or subtracting a fixed number.

12. The optical information recording medium reproducing device according to claim 11 , wherein the at least part of the intervals of the first wobble patterns are set to become smaller with increasing proximity to the address data.

13. The optical information recording medium reproducing device according to claim 12 , wherein the at least part of the intervals are set such that interval between the first wobble pattern in a front-end position and the first wobble pattern in a second position is 35 normal wave lengths (NWLs).

14. The optical information recording medium reproducing device according to claim 8 ,
wherein a prescribed number of second wobble patterns are interposed between a front-end position of the address information and a position of the first wobble pattern in the front-end position, and
a prescribed number of second wobble patterns are interposed between a last position of the address information and a position of the first wobble pattern in the last position.

Assignees

• Sony Corp

Inventors

• Horigome Toshihiro
• Higashino Satoru

Classifications

• G11B2007/00754

  Track shape, e.g. address or synchronisation information in wobbled track or sidewall · CPC title

• G11B7/007

  Arrangement of the information on the record carrier, e.g. form of tracks {, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track} · CPC title

• G11B20/1217

  on discs · CPC title

• G11B7/0079

  Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas · CPC title

• G11B2020/1267

  Address data · CPC title