Method for bit resynchronization of code-constrained sequences

Details Method for bit resynchronization of code-constrained sequences Method for bit resynchronization of code-constrained sequences

1992-12-15

1995-10-24

Envall, Jr., Roy N.

Excavating

371 42, 39518311, G06F 1100

Patent

active

054616310

ABSTRACT:
A method is disclosed for recovery from synchronization errors caused by deletions and/or insertions of symbols in the presence of errors that alter the symbols in any code constrained binary record. The method initially divides the sequence of data into equal size blocks before appending a binary sync sequence at the end of each block not encountered in the block. Then, the blocks are resynchronized by first determining the size of any symbol insertions and/or deletions that have occurred. Then, scanning for the sync sequence starting at the presumed end of the data field of the current block so as to determine the offset of the sync sequence with respect to that specific location. After this location of the insertions and/or deletions has been determined, a corresponding number of symbols can be added or deleted from the middle of the block according to the offset determined by the present method.

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