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公开(公告)号：DE69019590D1
公开(公告)日：1995-06-29
申请号：DE69019590
申请日：1990-03-08
Applicant: IBM
Abstract: A record medium, such as a magnetic tape, optical disk, magnetic disk, and the like stores data signals and error redundancy signals. Re-synchronisation signals are interleaved between the recorded signals such that the error redundancy signals are usable to correct signals recorded between such interposed re-synchronisation signals wherein no error redundancy signals are recorded. Error pointing redundancy signals are recorded between all of the re-synchronisation signals for pointing to signals in error for enhancing the error correction. Such error pointing signals can be cyclic redundancy check (CRC) signals. Controls for taking advantage of the above-described arrangement are also described. Reframing and clock synchronisation controls are also disclosed.
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公开(公告)号：DE3586035D1
公开(公告)日：1992-06-17
申请号：DE3586035
申请日：1985-10-23
Applicant: IBM
Inventor： ADLER ROY LEE , FRANASZEK PETER ANTHONY , HASSNER MARTIN , SCHNEIDER RICHARD CRANE
Abstract: The present invention relates to apparatus for encoding and decoding a stream of randomly distributed binary bits representing digital data of the type comprising encoding means (10) for encoding the stream of binary bits, recording means (18) for recording representations of the encoded stream of binary bits and recovery means (20, 25) for recovering timing signals and a stream of data signals from the recorded representations. … The apparatus is characterised in that the encoding means (10) achieves a run length limited, partial response coding of the data stream, and the recovery means comprises a first partial response decoder (20) for recovering a timing signal from the recorded representations, and a second partial response decoder (22) and a constrained decoder (24) means for recovering a stream of data signals from the recorded representations. … The present invention also relates to a method of encoding and decoding a stream of randomly distributed binary bits representing digital data using apparatus as above.
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公开(公告)号：NZ232174A
公开(公告)日：1992-05-26
申请号：NZ23217490
申请日：1990-01-19
Applicant: IBM
Abstract: A record medium, such as a magnetic tape, optical disk, magnetic disk, and the like stores data signals and error redundancy signals. Re-synchronisation signals are interleaved between the recorded signals such that the error redundancy signals are usable to correct signals recorded between such interposed re-synchronisation signals wherein no error redundancy signals are recorded. Error pointing redundancy signals are recorded between all of the re-synchronisation signals for pointing to signals in error for enhancing the error correction. Such error pointing signals can be cyclic redundancy check (CRC) signals. Controls for taking advantage of the above-described arrangement are also described. Reframing and clock synchronisation controls are also disclosed.
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