US 7,068,579 B2Granted

Recordable optical disc, optical disc recording apparatus, optical disc reproduction apparatus, and method for recording data onto recordable optical disc

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorsShuichi Tasaka, Mamoru Shoji

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Abstract

A DVD-R recorder according to the invention detects an item of recording speed information (d15) from a DVD-R (30) on which histories of recording speed information, write strategy, and recording power condition are stored. When the decoded item of recording speed information (d15) agrees with a set item of recording speed information (d17), the recorder detects the write strategy (d6) and the recording power condition (d10) corresponding to the decoded item of recording speed information (d15). A recording-pulse-determination section (9) converts a recording pattern (d8) into a recording pulse (d9) according to the write strategy (d6). A recording-power-determination section (12) performs an OPC based on the recording power condition (d10). The recording power condition (d10) may include information specifying that a recording pulse corresponding to the front edge of a recorded mark has a larger recording power than other recording pulses.

Claims6

Dependent claims

An optical disk recording apparatus for optically recording data onto a recordable optical disk, said optical disk recording apparatus comprising:

(A) a semiconductor laser for emitting laser light to said recordable optical disk at a predetermined power level;
(B) a recording-speed-information decoder for decoding data from said recordable optical disk into an item of a recording speed information and producing an output as a decoded item of recording speed information;
(C) a recording-speed setting section for setting a recording speed and producing an output as a set item of recording speed information;
(D) a recording speed comparator for comparing said decoded item of recording speed information with said set item of recording speed information;
(E) a write strategy decoder for decoding the data from said recordable optical disk into a write strategy corresponding to said decoded item of recording speed information;
(F) a recording-pattern-determination section for determining a recording pattern corresponding to said data;
(G) a recording-pulse-determination section for converting said recording pattern into a recording pulse according to said write strategy, in case that said recording speed comparator detects agreement between said decoded item of recorded speed information and said set item of recording speed information;
(H) a recording-power-determination section for performing an optimum power calibration (OPC) based on said analog signal, thereby determining a recording power level of said semiconductor laser;
and
(I) a laser driver for driving said semiconductor laser according to said recording pulse and said recording power level.

7 more elements

An optical disk recording apparatus for optically recording data onto a recordable optical disk, said optical disk recording apparatus comprising:

(A) a semiconductor laser for emitting laser light to said recordable optical disk at a predetermined power level;
(B) a photodetector for detecting said laser light emitted from said semiconductor laser at a predetermined reproducing power level and reflected off said recordable optical disk, and converting said laser light into an analog signal;
(C) an AD converter for converting said analog signal into a digital signal;
(D) a β-value measurement section for measuring the β value of said analog signal;
(E) a recording-speed-information decoder for decoding said digital signal into said recording speed information and producing an output as a decoded item of recording speed information;
(F) a recording-speed setting section for setting a recording speed and producing an output as a set item of recording speed information;
(G) a recording speed comparator for comparing said decoded item of recording speed information with said set item of recording speed information;
(H) a recording-power-condition decoder for decoding said digital signal into said recording power condition corresponding to said decoded item of recording speed information;
(I) a recording-pattern-determination section for determining a recording pattern corresponding to said data;
(J) a recording-pulse-determination section for determining a recording pulse from said recording pattern;
(K) a recording-power-determination section for performing an optimum power calibration (OPC) based on said recording power condition and said β value, thereby determining a recording power level of said semiconductor laser, in case that said recording speed comparator detects agreement between said decoded item of recorded speed information and said set item of recording speed information;
and
(L) a laser driver for driving said semiconductor laser according to said recording pulse and said recording power level;
and establishing a correspondence of a new item of said recording power condition obtained through said optimum power calibration of said recording-power-determination section with said set item of recording speed information, and storing the new item of said recording power condition in said recordable optical disk.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/312,827Filed 22 Apr 2002
Priority: JP 200113300627 Apr 2001
Published: US 2003/0151994 A114 Aug 2003
Granted: 27 Jun 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G11B 7/1267
Circuits, methods or arrangements for laser control or stabilisation: power calibration
G11B 7/00456
Recording: recording strategies, e.g. pulse sequences
G11B 7/00736
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;…:…
G11B
Information storage based on relative movement between record carrier and transducer