# US 7,406,017 B2 · Apparatus for reproducing data from information storage medium having multiple storage layers with optimal power control (OPC) areas and buffer areas

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- Number: US 7,406,017 B2
- Document ID: US7406017B2
- Status: Granted
- Kind: B2
- Application number: 11/743,708
- Filed: 2007-05-03
- Published: 2007-08-30
- Granted: 2008-07-29
- Earliest claimed: 2003-06-12
- Assignees: Samsung Electronics Co., Ltd.
- Inventors: Kyung-geun Lee; Jung-wan Ko
- Web page: https://patentgrep.com/patent/US7406017B2

## CPC

- 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 7/1267: Power calibration
- G11B 7/24038: Multiple laminated recording layers
- G11B 7/0953: {to compensate for eccentricity of the disc or disc tracks}
- G11B 2007/0013: {for carriers having multiple discrete layers}
- G11B 2020/1275: {Calibration data, e.g. specific training patterns for adjusting equalizer settings or other recording or playback parameters}
- G11B 2020/1277: {for managing gaps between two recordings, e.g. control data in linking areas, run-in or run-out fields, guard or buffer zones}
- G11B 2220/235: Multilayer discs, i.e. multiple recording layers accessed from the same side
- G11B 2220/2537: Optical discs
- 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 information storage medium and an apparatus for recording and/or reproducing the information storage medium capable of controlling optimal recording power without an influence of an optimal power control (OPC) area in a layer upon an OPC area in a different layer. The information storage medium includes at least one information storage layer including an optimal power control area for obtaining an optical recording condition. OPC areas in adjacent information storage layers are disposed within different radiuses of the information storage medium. Accordingly, even when the information storage medium is made eccentric or has a manufacturing error, a recording property of the information storage medium is prevented from being degraded due to an influence of an OPC area in an information storage layer upon an OPC area in an adjacent information storage layer.

## Claims

### Claim 1

A reproducing apparatus, comprising:
a reader to reproduce data from an information storage medium, the information storage medium including a plurality of information storage layers; and
a controller arranged to control the reader to reproduce data from the information storage medium,
wherein each of the information storage layers includes an optimal power control area used to obtain an optimum recording condition, and at least one of a buffer area and a reproduction-only area to store reproduction-only data, and
wherein a portion of the reproduction-only area of one of the information storage layers is aligned with and faces the optical power control area and the buffer area of an adjacent one of the information storage layers.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the reproduction-only area of the one of the information storage layers is larger than the optimal power control area of the adjacent one of the information storage layers on the information storage medium.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the buffer area is disposed at both sides of the optimal power control area, and one of buffer areas that is located in front of the optimal power control area has a size corresponding to a first recorded pair of disk-related information and disk control data.

### Claim 4

An information storage medium, comprising:
a plurality of information storage layers, each including an optimal power control area used for obtaining an optimum recording condition and at least one of a buffer area and a reproduction-only area used for storing reproduction-only data, and
wherein a portion of the reproduction-only area of one of the information storage layers is aligned with and faces the optical power control area and the buffer area of an adjacent one of the information storage layers.

### Claim 5 (depends on 4)

The information storage medium of claim 4, wherein the reproduction-only area of the one of the information storage layers is larger than the optimal power control area of the adjacent one of the information storage layers, and wherein the buffer area is disposed at both sides of each of the optimal power control areas.