Optical recording disk capable of resynchronization in digital e

Details Optical recording disk capable of resynchronization in digital e Optical recording disk capable of resynchronization in digital e

1996-01-26

1997-04-22

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 59, 341 59, 341 94, 375293, G11B 724, H03M 1300

Patent

active

056234775

ABSTRACT:
In carrying out PWM-recording on optical disks, RESYNC BYTES including a bit compensation part, RESYNC detection part, and bit synchronization part are periodically inserted in the recorded data code stream. After encoding and at the time of decoding, RESYNC BYTES are detected by detection of the RESYNC detection part. The decoder is initialized by detecting the position of the bit synchronization part, and decoding is performed satisfactorily free from error. With this configuration, even for synchronization bytes having a comparatively long portion of consecutive code values, bit resynchronization is enabled free from mis-detection caused by peak shift. Even with the recording and reproducing characteristics with an un-symmetrical unerased area of the mark and space parts, the RESYNC detection part is fixed to either mark or space and RESYNC BYTES with little influence on an unerased area can be realized.

REFERENCES:
patent: 4484176 (1984-11-01), Fitzpatrick
patent: 4774701 (1988-09-01), Ozaki et al.
patent: 4862443 (1989-08-01), Tsuji et al.
patent: 5229986 (1993-07-01), Mizokami et al.
patent: 5333126 (1994-07-01), Fukuda et al.
patent: 5383171 (1995-01-01), Mizokami et al.
patent: 5451943 (1995-09-01), Satomura

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