Pulse or digital communications – Multilevel – Synchronized
Patent
1994-03-14
1996-08-13
Chin, Stephen
Pulse or digital communications
Multilevel
Synchronized
375364, 360 41, 360 48, 341 94, H04L 2549
Patent
active
055464270
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: 5165089 (1992-11-01), Jaquette et al.
patent: 5172381 (1992-12-01), Karp et al.
patent: 5220568 (1993-06-01), Howe et al.
patent: 5233584 (1993-08-01), Kulakowski et al.
Nakajima Takeshi
Shimada Toshiyuki
Chin Stephen
Matsushita Electric - Industrial Co., Ltd.
Vo Don
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