Method and device for use with helical scan data recording by im

Details Method and device for use with helical scan data recording by im Method and device for use with helical scan data recording by im

1995-12-21

1998-05-26

Baker, Stephen M.

Excavating

371 374, 371 4016, G11B 2018

Patent

active

057578087

ABSTRACT:
A method and device for use with helical scan data recording by implementing a Reed-Solomon product code, a unitary medium comprising such data, and a cassette comprising such medium.
Error protective data encoding for use with rotary head helical scan tape-recording is done by providing a first word-wise Reed-Solomon code along each recording track defined in first code words, and a second Reed-Solomon code defined in second code words. The first and second Reed-Solomon codes together form a product code format. Each second codeword has a sequence of symbols across a plurality of contiguous tracks. The symbols of a single second codeword have substantially uniform displacements between contiguous symbols both in a direction parallel to a length of the tape, and also in a direction perpendicular to a length of the tape. Each second codeword extends substantially along a length of the tracks associated to the recording.

REFERENCES:
patent: 4630272 (1986-12-01), Fukami et al.
patent: 4852102 (1989-07-01), Yamaguchi
patent: 4882732 (1989-11-01), Kaminaga
Watkinson, The Art of Digital Video, pp. 416-434.

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