Optical disk
The invention provides an optical disk that enables high-speed reproduction of address signals. A wobble address system for optical disk supports various types of synchronization, such as phase synchronization, bit synchronization, word synchronization, etc., to be established easily with high detec...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
14.04.2009
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Online Access | Get full text |
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Abstract | The invention provides an optical disk that enables high-speed reproduction of address signals. A wobble address system for optical disk supports various types of synchronization, such as phase synchronization, bit synchronization, word synchronization, etc., to be established easily with high detection reliability with the use of an self-orthogonal code. Thus, the invention provides a method for easily synchronizing an address signal, i.e., high-speed reproduction of the address signal. Further, by virtue of an efficient modulation system of the address signal and redundancy thereof, it becomes possible to detect address information with high reliability. This capability is particularly effective in optical recording/reproduction with a blue light source whose signal light quantity and reproduction quality are prone to reduce. Moreover, other additional data of the address data is preserved in the wobbles, which provides medium information to a rewritable optical disk without using embossed pits such that a high-reliability disk (with enhanced security) is realized with a low cost and easily. |
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AbstractList | The invention provides an optical disk that enables high-speed reproduction of address signals. A wobble address system for optical disk supports various types of synchronization, such as phase synchronization, bit synchronization, word synchronization, etc., to be established easily with high detection reliability with the use of an self-orthogonal code. Thus, the invention provides a method for easily synchronizing an address signal, i.e., high-speed reproduction of the address signal. Further, by virtue of an efficient modulation system of the address signal and redundancy thereof, it becomes possible to detect address information with high reliability. This capability is particularly effective in optical recording/reproduction with a blue light source whose signal light quantity and reproduction quality are prone to reduce. Moreover, other additional data of the address data is preserved in the wobbles, which provides medium information to a rewritable optical disk without using embossed pits such that a high-reliability disk (with enhanced security) is realized with a low cost and easily. |
Author | Miyamoto, Harukazu Kurokawa, Takahiro |
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References | Minamino et al. (6674700) 20040100 (10-320784) 19970500 (10-312542) 19970500 (11-31365) 19970700 Minamino et al. (6608810) 20030800 Miyamoto et al. (6977882) 20051200 Miyamoto et al. (6690641) 20040200 (2000-011384) 19980600 Miyamoto et al. (7042832) 20060500 Miyamoto et al. (6542458) 20030400 Sensyu (6201778) 20010300 Minamino et al. (6757239) 20040600 (61-219222) 19850300 (10-91967) 19970200 (10-222874) 19970200 (10-283677) 19970400 (9-212871) 19960200 Kobayashi et al. (5754522) 19980500 Minamino et al. (6577590) 20030600 Sensyu (6125100) 20000900 (2001-67678) 19990900 |
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Snippet | The invention provides an optical disk that enables high-speed reproduction of address signals. A wobble address system for optical disk supports various types... |
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