# US 7,609,594 B2 · Optical disc having uniform structure

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- Number: US 7,609,594 B2
- Document ID: US7609594B2
- Status: Granted
- Kind: B2
- Application number: 11/959,801
- Filed: 2007-12-19
- Published: 2008-04-24
- Granted: 2009-10-27
- Earliest claimed: 2001-05-02
- Assignees: Samsung Electronics Co., Ltd.
- Inventors: Kyung-geun Lee; In-sik Park; Du-seop Yoon
- Web page: https://patentgrep.com/patent/US7609594B2

## CPC

- G11B 7/24082: Meandering
- G11B 7/0053: {Reproducing non-user data, e.g. wobbled address, prepits, BCA}
- G11B 7/00718: {Groove and land recording, i.e. user data recorded both in the grooves and on the lands}
- G11B 7/261: {Preparing a master, e.g. exposing photoresist, electroforming}
- G11B 20/1217: {on discs}
- G11B 20/1426: {conversion to or from block codes or representations thereof}
- G11B 27/24: by sensing features on the record carrier other than the transducing track {; sensing signals or marks recorded by another method than the main recording}
- G11B 27/3027: {used signal is digitally coded}
- G11B 7/00736: {Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information (sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082)}
- G11B 7/00745: {Sectoring or header formats within a track (formats in general G11B20/12)}
- G11B 7/24038: Multiple laminated recording layers
- G11B 20/1403: {characterised by the use of two levels}
- G11B 2020/1239: {the track being a pregroove, e.g. the wobbled track of a recordable optical disc}
- G11B 2020/1274: {stored in pre-pits, i.e. in embossed pits, ROM marks or prepits}
- G11B 2020/1292: {Enhancement of the total storage capacity}
- G11B 2220/216: Rewritable discs
- G11B 2220/235: Multilayer discs, i.e. multiple recording layers accessed from the same side
- G11B 2220/2562: DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
- G11B 2220/2575: DVD-RAMs
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.

## Claims

### Claim 1

An optical storage medium comprising:
a lead-in area comprising a read-only area and a readable/recordable area;
a user data area in which user data is recorded;
a first wobble formed in the read-only area of the lead-in area; and
a second wobble formed in the readable/recordable area of the lead-in area,
wherein:
the user data is transferred with respect to the user data area,
the first wobble is modulated by a first modulation method, and
the second wobble is modulated by a second modulation method other than the first modulation method.

### Claim 2

An apparatus for transferring data with respect to an optical storage medium comprising a lead-in area, which comprises a read-only area and a readable/recordable area, and a user data area in which user data is recorded, the apparatus comprising:
an optical pickup to emit light to transfer data with respect to the storage medium; and
a controller arranged to control the optical pickup to record data on the user data area,
wherein:
the user data is transferred with respect to the user data area,
first data is transferred with respect to a first wobble formed in the read-only area of the lead-in area,
second data is transferred with respect to the readable/recordable area of the lead-in area in which a second wobble is formed,
the first wobble is modulated by a first modulation method, and
the second wobble is modulated by a second modulation method other than the first modulation method.

### Claim 3

A method of transferring data with respect to an optical storage medium comprising a lead-in area, which comprises a read-only area and a readable/recordable area, and a user data area in which user data is recorded, the method comprising:
transferring first data with respect to a first wobble formed in the read-only area of the lead-in area;
transferring second data with respect to the readable/recordable area of the lead-in area in which a second wobble is formed; and
transferring the user data with respect to the user data area, wherein:
the first wobble is modulated by a first modulation method,
the second wobble is modulated by a second modulation method other than the first modulation method, and
the second modulation method comprises a minimum shift keying (MSK) modulation method.

### Claim 4

An optical storage medium comprising:
a lead-in area comprising a read-only area and a readable/recordable area;
a user data area in which user data is recorded;
a first wobble formed in the read-only area of the lead-in area; and
a second wobble formed in the readable/recordable area of the lead-in area,
wherein:
the first wobble is modulated by a first modulation method,
the second wobble is modulated by a second modulation method other than the first modulation method, and
the second modulation method comprises a saw tooth wobble (STW) modulation method.

### Claim 5

An apparatus for transferring data with respect to an optical storage medium comprising a lead-in area, which comprises a read-only area and a readable/recordable area, and a user data area in which user data is recorded, the apparatus comprising:
an optical pickup to emit light to transfer data with respect to the storage medium; and
a controller arranged to control the optical pickup to record data on the storage medium,
wherein:
first data is transferred with respect to a first wobble formed in the read-only area of the lead-in area,
second data is transferred with respect to the readable/recordable area of the lead-in area in which a second wobble is formed,
the first wobble is modulated by a first modulation method,
the second wobble is modulated by a second modulation method other than the first modulation method, and
the second modulation method comprises a saw tooth wobble (STW) modulation method.

### Claim 6

An optical storage medium comprising:
a lead-in area comprising a read-only area and a readable/recordable area;
a user data area in which user data is recorded;
a first wobble formed in the read-only area of the lead-in area; and
a second wobble formed in the readable/recordable area of the lead-in area,
wherein:
the first wobble is modulated by a first modulation method,
the second wobble is modulated by a second modulation method other than the first modulation method, and
the second modulation method comprises a minimum shift keying (MSK) modulation method or a saw tooth wobble (STW) modulation method.

### Claim 7

An apparatus for transferring data with respect to an optical storage medium comprising a lead-in area, which comprises a read-only area and a readable/recordable area, and a user data area in which user data is recorded, the apparatus comprising:
an optical pickup to emit light to transfer data with respect to the storage medium; and
a controller arranged to control the optical pickup to record data on the storage medium,
wherein:
first data is transferred with respect to a first wobble formed in the read-only area of the lead-in area,
second data is transferred with respect to the readable/recordable area of the lead-in area in which a second wobble is formed,
the first wobble is modulated by a first modulation method,
the second wobble is modulated by a second modulation method other than the first modulation method, and
the second modulation method comprises a minimum shift keying (MSK) modulation method or a saw tooth wobble (STW) modulation method.

### Claim 8

A method of transferring data with respect to an optical storage medium comprising a lead-in area, which comprises a read-only area and a readable/recordable area, and a user data area in which user data is recorded, the method comprising:
transferring first data with respect to a first wobble formed in the read-only area of the lead-in area; and
transferring second data with respect to the readable/recordable area of the lead-in area in which a second wobble is formed,
wherein:
the first wobble is modulated by a first modulation method,
the second wobble is modulated by a second modulation method other than the first modulation method, and
a first track pitch of the readable/recordable area is less than a second track pitch of the read-only data area.