Optical disk device

Details Optical disk device Optical disk device

2005-07-08

2008-08-12

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S044130

Reexamination Certificate

active

07411879

ABSTRACT:
An optical disk device which drives an HD-DVD or the like. When recording or reproducing data with respect to an optical disk of HD-DVD, the address information is demodulated by an address decoding circuit and is supplied to a system controller. The system controller performs error checking using the CRC technique. When a resulting CRC value does not correspond to CRC bits, the system controller regards a bit in which the number of waves in wobbles having the same phase is not four, which is a predetermined value, as an error bit, and performs bit data replacement with respect to the error bit. Specifically, the system controller searches for a combination of bit values by which a resulting CRC value matches the CRC bits, thereby performing error correction. At this time, the system controller tries the data value replacement preferentially using a combination of bit values by which the address is advanced by one address from the immediately previous address which is fixed among all the possible combinations with respect to the error bits.

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“Next Generation DVD Specification HD DVD,”Nikkei Electronics/Nikkei BP, Oct. 13, 2003, pp. 126-134 with partial English translation.
“Essentials of Next Generation Optical Disk,” Excerpt from Nikkei Electronics Books, Nikkei Business Publications, Inc., Tokyo, Oct. 7, 2003, pp. 106-108.
Notice of Grounds for Rejection (JP) dated May 20, 2008, issued in corresponding Japanese Application No. 2005-147036.

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