Error-correction-code coding & decoding procedures for the...

H - Electricity – 04 – N

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H04N 7/64 (2006.01) H04N 5/782 (2006.01) H04N 9/804 (2006.01) H04N 5/7826 (2006.01) H04N 5/783 (2006.01) H04N 9/82 (2006.01)

Patent

CA 2159885

The error-correction coding function of an SD-VCR for recording and reproducing an ATV signal is modified to exclude trick-play data from outer error-correction coding in two-dimensional Reed-Solomon coding of normal play data, to improve error-correcting capability for the normal-play data. The same error-correction coding used as inner error-correction coding in the two-dimensional.Reed-Solomon coding of normal play data is performed on the trick-play data as well as on the outer error-correction coded normal-play data. The resulting inner codes are preferably diagonal-scan interleaved before recording, at least for the normal-play data. During reproduction, after de-interleaving when interleaving was performed during recording, the inner error-correction coded data are decoded and separated into trick-play data and outer error-correction coded normal-play data. Outer error-correction coded normal-play data are decoded during normal play.

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