Frame synchronizing method and system

Details Frame synchronizing method and system Frame synchronizing method and system

1988-11-10

1990-10-16

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

To or from nrz codes

341 68, H03M 514

Patent

active

049638688

ABSTRACT:
An original data stream encoded into an M.sup.2 coded data stream having a plurality of bit cells has a synchronizing signal with a unique sync pattern based on the logic levels of the original data stream inserted into the M.sup.2 coded data stream. The unique pattern forming the synchronizing signal is constructed so as not to appear as a pattern in the combined data stream other that at the locations of the inserted synchronizing signal. As a result, random M.sup.2 coded data patterns are not erroneously detected to be a sync pattern, thereby avoiding a synchronization shift and the occurrence of a synchronization error. Accordingly, a correct and stable synchronization can be established so as to enable reproduction of an original data stream with high fidelity.

REFERENCES:
patent: 4045613 (1977-08-01), Walker
patent: 4072987 (1978-02-01), Walker
patent: 4124778 (1978-11-01), Amass
patent: 4353129 (1982-10-01), Nishiwaki
patent: 4683586 (1987-07-01), Sakamoto et al.

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