Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1996-03-29
1998-12-08
Tran, Thai
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386 71, H04N 5935
Patent
active
058482180
ABSTRACT:
An adaptive sync protection apparatus for a digital video cassette recorder (VCR) adaptively protects a sync signal being reference of processing a digital reproduction signal reproduced via a recording medium from the varied reproduction characteristics of a channel. The apparatus comprises a sync detection unit for detecting sync data from the digital reproduction signal and outputting a sync detection signal and a sync signal; a sync prediction/error detection unit for determining sync detection prediction positions for a present track using the sync detection signal and a sync detection reference number, detecting error-sync and sync missing corresponding to the present track based on the sync detection prediction positions and the sync detection signal and outputting an error-sync generation number and an sync missing number; and a reference value generation unit for generating the sync detection reference number with respect to the following track, using the sync missing number and the error-sync generation number of the present track. Accordingly, this apparatus can adapt generation of the sync signal to reproduction characteristics of a channel as the sync detection reference number is adaptively adjusted, even when the reproduction characteristics of a channel provides a relatively good or poor circumstance for sync detection.
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Nguyen Huy
Samsung Electronics Co,. Ltd.
Tran Thai
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