Abstract: It is to provide an optical disc recording apparatus and a recording power control method that are adapted to high-speed recording and can set an optimal erasing power with high accuracy. A test writing signal detector reproduces a test writing signal of a predetermined mark length or space length with varied power, and detects the number of error mark signals and an amplitude value of an envelope. A controller obtains a first threshold Pe0 of the erasing power based on the number of error mark signals in a region where laser power is low, and obtains a second threshold Pe1 of the erasing power based on the amplitude value in a region where the laser power is high. Then, the controller sets an optimal value of the erasing power from an average value of the first and second thresholds.

Abstract: The present invention makes it possible to reproduce reproduction images without a break without having to use any additional identification information even when real-time recorded data is not completely continuous. A control circuit references a data identification flag (“Recording Type”) which is attached to each sector of reproduction data to indicate the type of recorded data, and counts the number of sectors to which the data identification flag representing real-time recorded data is attached. When the count is not smaller than a threshold value, the control circuit reproduces all the sectors of the target reproduction block in a real-time reproduction mode. In the real-time reproduction mode, the control circuit masks a portion of reproduction data that is found to be defective, changes the value of the defective data to 0 (zero), and transfers the resulting reproduction data to a host device.

Abstract: An optical disc apparatus capable of improving an overwrite performance for performing an overwrite operation on a re-writable type optical disc. The apparatus includes a calculating section which calculates out a recording power at the time of previously performing recording in a recording area of the optical disc, and a recording power determining section which determines a write power of the recording power calculated out by the calculating section as a write power of the currently recorded recording power, and at the same time, adjusts erase power, cooling power, and/or middle power of the recording power calculated out by the calculating section to finally determine the currently recorded recording power.

Abstract: The present invention makes it possible to reproduce reproduction images without a break without having to use any additional identification information even when real-time recorded data is not completely continuous. A control circuit references a data identification flag (“Recording Type”) which is attached to each sector of reproduction data to indicate the type of recorded data, and counts the number of sectors to which the data identification flag representing real-time recorded data is attached. When the count is not smaller than a threshold value, the control circuit reproduces all the sectors of the target reproduction block in a real-time reproduction mode. In the real-time reproduction mode, the control circuit masks a portion of reproduction data that is found to be defective, changes the value of the defective data to 0 (zero), and transfers the resulting reproduction data to a host device.

Abstract: It is to provide an optical disc recording apparatus and a recording power control method that are adapted to high-speed recording and can set an optimal erasing power with high accuracy. A test writing signal detector reproduces a test writing signal of a predetermined mark length or space length with varied power, and detects the number of error mark signals and an amplitude value of an envelope. A controller obtains a first threshold Pe0 of the erasing power based on the number of error mark signals in a region where laser power is low, and obtains a second threshold Pe1 of the erasing power based on the amplitude value in a region where the laser power is high. Then, the controller sets an optimal value of the erasing power from an average value of the first and second thresholds.

Abstract: For providing a method for conducting a real-time compensation on the recording power during that verify process, and also for providing an optical disk apparatus for achieving the high-speed recording of information and the high quality, by adopting such the method therein, the method for compensating a recording power of an optical disk apparatus, for recording/reproducing information onto/from an optical disk 100, which forms a track made of spiral-like land and groove on a information recording surface thereof, and is executed with a verify process for a defect block within a user data recording area thereof, wherein when executing a verify process, error information of data, which is written by a light irradiated from an optical pickup 200, is obtained from a reproduced signal, which is reproduced from said optical pickup, and an intensity of the light irradiated from a laser light source of said optical pickup, upon basis of a ? value, which is obtained by a ? value detecting means 240, as well as, the

Abstract: An optical disk apparatus for enabling to suppress the time necessary for alternation process down to the minimum, as well as, for executing the alternation process with certainty, and also an alternation process method for that apparatus, for recording alternation information for a defect block detected within a user data recording area of an optical disk, into alternation areas of the optical disk 100, wherein during recording operation of user data, when detecting a defect block within the user data recording area on the optical disk, after executing the alternation process only on one side of alternation areas provided on both an inner periphery side and an outer periphery side of the optical disk, the alternation process is executed on a remaining alternation area, but after completing the recording operation of the user data.