Bi-phase mark reproduction apparatus and optical disk drive...

Details Bi-phase mark reproduction apparatus and optical disk drive... Bi-phase mark reproduction apparatus and optical disk drive...

2006-08-29

2006-08-29

Huber, Paul W. (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

C369S053350

Reexamination Certificate

active

07099256

ABSTRACT:
A bi-phase mark reproduction apparatus which reduces an error rate of demodulated data by half and improves demodulation ability of ATIP and an optical disk drive device are provided. The bi-phase mark reproduction apparatus includes a data conversion unit which takes out a synchronous code portion, a data portion and an error detection code portion from a bi-phase mark input signal by means of a data separating signal and demodulates data of the data portion and the error detection code portion. The data conversion unit includes a pattern retrieval unit which detects a predetermined error pattern contained in the data portion and a conversion table which decodes the error pattern in accordance with a replacement rule based on bi-phase mark modulation.

REFERENCES:
patent: 5917783 (1999-06-01), Kobayashi et al.
patent: 6233219 (2001-05-01), Hori et al.
patent: 6785213 (2004-08-01), Shishido et al.
patent: 10312639 (1998-11-01), None

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