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

An optical disk recording apparatus for optically recording data onto a recordable optical disk comprising a recording speed information area, wherein an item of recording speed information is stored, and a write strategy area, wherein a write strategy corresponding to the item of said recording speed information is stored,

• 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 analog-to-digital (AD) converter for converting said analog signal into a digital signal;
• (D) a recording-speed-information decoder for decoding said digital signal into an item of said recording speed information and producing an output as a decoded item of recording speed information;
• (E) a recording-speed setting section for setting a recording speed and producing an output as a set item of recording speed information;
• (F) a recording speed comparator for comparing said decoded item of recording speed information with said set item of recording speed information;
• (G) a write strategy decoder for decoding said digital signal into said write strategy corresponding to said decoded item of recording speed information, when said recording speed comparator detects agreement between said decoded item of recording speed information and said set item of recording speed information;
• (H) a recording-pattern-determination section for determining a recording pattern corresponding to said data;
• (I) a recording-pulse-determination section for converting said recording pattern into a recording pulse according to said write strategy;
• (J) a recording-power-determination section for performing an OPC based on said analog signal, thereby determining a recording power level of said semiconductor laser;
• and
• (K) a laser driver for driving said semiconductor laser according to said recording pulse and said recording power level.

An optical disk recording apparatus for optically recording data onto a recordable optical disk comprising a recording speed information area, wherein an item of recording speed information is stored, and a recording power condition area, wherein a recording power condition corresponding to the item of said recording speed information is stored,

• 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, when said recording speed comparator detects agreement between said decoded item of recording speed information and said set 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 OPC based on said recording power condition and said β value, thereby determining a recording power level of said semiconductor laser;
• and
• (L) a laser driver for driving said semiconductor laser according to said recording pulse and said recording power level;
• and establishing a correspondence between a new item of said recording power condition obtained through said OPC of said recording-power-determination section and said set item of recording speed information, and storing the new item of said recording power condition and said set item of recording speed information in said recording power condition area and said recording speed information area of said recordable optical disk, respectively.

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

• said optical disk recording apparatus comprises:
• (A) a semiconductor laser for emitting laser light to said recordable optical disk at a predetermined power level;
• (B) a photodetector for detecting 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) a recording-pattern-determination section for determining a recording pattern corresponding to said data;
• (D) a recording-pulse-determination section for converting said recording pattern into a recording pulse according to a predetermined write strategy;
• (E) a recording-power-determination section for performing an OPC based on said analog signal, thereby determining a recording power level of said semiconductor laser at (a) a first recording power level for said recording pulse corresponding to a specific portion in said recording pattern and (b) a second recording power level lower than said first recording power level for the others of said recording pulses;
• and
• (F) a laser driver for driving said semiconductor laser according to said recording pulses and said recording power levels.

An optical disk reproducing apparatus comprising:

• (A) a semiconductor laser for emitting laser light of a predetermined reproducing power level to an optical disk on which items of recording speed information are stored at the times of data recordings;
• (B) a photodetector for detecting said laser light reflected off said optical disk and converting said laser light into an analog signal;
• (C) an equalizer for compensating for distortions of said analog signal resulting from the frequency characteristics with predetermined correction values;
• (D) a binarizer for binarizing said analog signal compensated by said equalizer with respect to a predetermined threshold value, thereby converting said analog signal into a digital signal;
• (E) a recording-speed-information decoder for decoding said digital signal into an item of said recording speed information and producing an output as a decoded item of recording speed information;
• (F) a correction value determination section for determining a correction value of said equalizer according to said decoded item of recording speed information;
• and
• (G) a threshold determination section for determining a threshold value of said binarizer according to said decoded item of recording speed information.

A method of optically recording data onto a recordable optical disk comprising a recording speed information area, wherein an item of recording speed information is stored, and a write strategy area, wherein a write strategy corresponding to the item of said recording speed information is stored,

• said method comprising the steps of:
• (A) setting a recording speed and producing an output as a set item of recording speed information;
• (B) optically reading and detecting an item of said recording speed information from said recordable optical disk, and producing an output as a decoded item of recording speed information;
• (C) comparing said decoded item of recording speed information with said set item of recording speed information;
• (D) optically reading said write strategy corresponding to said decoded item of recording speed information from said recordable optical disk, when said decoded item of recording speed information agrees with said set item of recording speed information;
• (E) performing an OPC, thereby determining a recording power level of a semiconductor laser;
• and
• (F) recording said data at said recording speed and said recording power level according to said write strategy.

A method of optically recording data onto a recordable optical disk comprising a recording speed information area, wherein an item of recording speed information is stored, and a recording power condition area, wherein a recording power condition corresponding to the item of said recording speed information is stored,

• said method comprising the steps of:
• (A) setting a recording speed and producing an output as a set item of recording speed information;
• (B) optically reading and decoding the item of said recording speed information from said recordable optical disk, and producing an output as a decoded item of recording speed information;
• (C) comparing said decoded item of recording speed information with said set item of recording speed information;
• (D) optically reading said recording power condition corresponding to said decoded item of recording speed information from said recordable optical disk, when said decoded item of recording speed information agrees with said set item of recording speed information;
• (E) performing an OPC based on said recording power condition, thereby determining a recording power level of a semiconductor laser;
• (F) recording said data on said recordable optical disk at said recording power level determined through said OPC;
• and
• (G) establishing a correspondence between a new recording power condition obtained through said OPC and said set item of recording speed information, and storing said new recording power condition and said set item of recording speed information in said recording power condition area and said recording speed information area of said recordable optical disk, respectively.

A method of optically recording data onto a recordable optical disk, comprising the steps of:

• (A) determining a recording pattern corresponding to target data of recording;
• (B) converting said recording pattern into a recording pulse according to a predetermined write strategy;
• (C) performing an OPC, thereby determining a recording power level of a semiconductor laser at (a) a first recording power level for said recording pulse corresponding to a specific portion in said recording pattern and (b) a second recording power level lower than said first recording power level for the others of said recording pulses;
• and
• (D) driving said semiconductor laser according to said recording pulses and said recording power levels, thereby recording said target data of recording on said recordable optical disk.