Method of correcting errors of digital signals in the recording

Details Method of correcting errors of digital signals in the recording Method of correcting errors of digital signals in the recording

1985-02-21

1987-04-28

Smith, Jerry

Excavating

371 50, 371 39, G06F 1110

Patent

active

046619569

ABSTRACT:
Parity bits (check bits) having a relatively high redundancy are added to upper significant bits of a digital signal, and parity bits having a relatively low redundancy, are added to the lower significant bits of the digital signal. The signal and the parity bits are recorded on a recording medium. The position of an error in a data block group of the lower bits reproduced from the recording medium is estimated as existing in a block in which the error is detected by the check of the data block group of the upper bits, and in the blocks preceding and subsequent to the former.
This error correction method is most suitable for a recording and reproduction system of digital video signals.

REFERENCES:
patent: 4044328 (1977-08-01), Herff
patent: 4314369 (1982-02-01), Caillet
patent: 4334309 (1982-06-01), Bannon
patent: 4369512 (1983-01-01), Brossard
patent: 4486881 (1984-12-01), de Couasnon
patent: 4549298 (1985-10-01), Creed

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