Optical disk having pattern for evaluating the optical disk

Details Optical disk having pattern for evaluating the optical disk Optical disk having pattern for evaluating the optical disk

G - Physics

11

B

G11B 7/007 (2006.01) G11B 7/0037 (2006.01) G11B 7/005 (2006.01) G11B 7/26 (2006.01) G11B 20/14 (2006.01) G11B 20/18 (2006.01) G11B 27/034 (2006.01) G11B 27/36 (2006.01) G11B 7/0045 (2006.01) G11B 7/013 (2006.01)

Patent

CA 2191588

A series of alternating pits and lands: a pit of 3T in pit length, a land of *6T in land length, a pit of 7T in pit length, a land of 3T in land length, a pit of 6T in pit length, and a land of 7T in land length, are provided in a read-in region (27) of an inner peripheral region of an optical disk (10). These pits and lands are used as a test pattern for evaluating the read-in error of the optical disk (10). The error rate is detected by reproducing this test pattern data by a reproduction system and correction coefficients for minimizing this error rate is determined. The reproduction signals are corrected by utilizing this correction coefficients. Therefore, the reproduction signals can be reproduced by the reproduction system at minimum error rate.

Dans une zone de lecture (27) d'une zone périphérique interne d'un disque optique (10), ou dispose en alternance des cuvettes et des replats: une cuvette de 3T de long, un replat de *6T de long, une cuvette de 7T de long, un replat de 3T de long, une cuvette de 6T de long et un replat de 7T de long. Ces cuvettes et replats constituent un motif d'essai permettant d'évaluer une erreur de lecture de ce disque optique (10). On détecte un taux d'erreur en reproduisant ces données de motif d'essai avec un système de reproduction et on détermine des coefficients d'erreur permettant de minimiser ce taux d'erreur. Les signaux de reproduction sont ensuite corrigés à l'aide de ces coefficients d'erreur, et ils peuvent donc être reproduits à un taux d'erreur minimum.

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