Variable cyclic redundancy character detector

Communications: electrical – Digital comparator systems

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Details

360 26, G06K 504

Patent

active

040443299

ABSTRACT:
The invention disclosed reduces unrecoverable read errors from a magnetic tape resulting from the apparent lack of a cyclic check character (CCC), sometimes referred to as a cyclic redundancy check character, or a longitudinal check character (LCC), sometimes referred to as a longitudinal redundancy check character. The detector provides a variable read window to synchronize receipt of the CCC and/or LCC with their associated data blocks even though the CCC and/or LCC was not written in the appropriate time frame called for by the write specification of the tape in question.

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patent: 3812531 (1974-05-01), Hall
patent: 3882459 (1975-05-01), Barlow et al.

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