Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1996-05-21
1998-10-06
Chevalier, Robert
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386109, H04N 591, H04N 5917
Patent
active
058190015
ABSTRACT:
Disclosed is an error correcting method for multispeed play which includes still, normal and high-speed play modes and is one of the most important functions of digital video cassette recorder (DVCR). A decoding method in normal play mode of DVCR comprises a first step of correcting errors with (n.sub.2 -(n.sub.a -k.sub.a),k.sub.2) RS code in each column vector, a second step of correcting or detecting errors with (n.sub.1,k.sub.1) RS code in each row vector, and erasing the entire symbols of a row vector if an error pattern is detected in the corresponding row vector, and a third step of correcting the erasures generated by the row decoder in the second step with (n.sub.2,k.sub.2) RS code in each column vector. The error correcting method enhances the error correcting capability in normal play mode as well as in high-speed play mode, and thus gives a lower symbol error rate than the conventional method does. It is shown that a significantly higher picture quality can be attained in normal play mode as well as in high-speed play mode.
REFERENCES:
patent: 4769819 (1988-09-01), Matsutani et al.
patent: 5587803 (1996-12-01), Inoue et al.
Kim Sang Wu
Kim Seung Ho
Chevalier Robert
LG Electronics Inc.
White John P.
LandOfFree
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