Patent ID: 6999393

Claim:
An apparatus for recording a signal on an optical disc by irradiating an optical beam according to a strategy which is stepwise updated by a given step amount, the apparatus comprising: a detector that successively detects a linear velocity of the optical disc relative to the optical beam in realtime basis; a strategy generator that operates every time the detector detects the linear velocity of the optical disc for successively generating the strategy according to the detected linear velocity; a storage having a plurality of storage areas, each being capable of memorizing the strategy successively generated by the strategy generator; a write controller that rewrites one of the storage areas every time the strategy is generated until the strategy is updated by a given step amount and then rewrites another of the storage areas every time the strategy is generated while leaving said one storage area to hold the updated strategy, thereby updating the strategy through the plurality of the storage areas; a read selector that selects the storage area holding the updated strategy to read therefrom the updated strategy while allowing the write controller to rewrite another storage area; a pulse generator that generates a pulse waveform shaped according to the updated strategy fed from the read selector; a recorder for irradiating the optical beam in response to the generated pulse waveform to record the signal on the optical disc; and a temperature detector that detects a temperature around the recorder, wherein the strategy generator generates multiple strategies according to the detected linear velocity for different zones of the temperature, the write controller holds the multiple updated strategies for the different zones of the temperature in the plurality of the storage areas, and the read selector selects one storage area according to the detected temperature to read therefrom the updated strategy for a particular zone of the temperature including the detected temperature.