Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1995-12-29
1997-09-02
Chevalier, Robert
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386 76, 348607, H04N 5911, H04N 591, H04N 521
Patent
active
056640455
ABSTRACT:
A video signal processor for compensating for skew and eliminating noise operable during a high speed search mode of operation includes a synchronizing signal generator receiving a clock and generating a pseudo horizontal sync signal, a controller, initialized in a first logic state of a horizontal synchronizing signal, for counting the period of a second logic state in the horizontal synchronizing signal with reference to the clock for generating a compensated composite synchronizing signal when a counted value exceeds a predetermined value and for generating a compensation control signal having a duration of one horizontal period, line memories and field memories for storing and delaying input video data in terms of line and field units, respectively, for output, a video data compensator for supplying the output of the line memories to the field memories in a first operating mode and feeding back the output of the line memories in a second operating mode responsive to the compensation control signal, and a video signal generator for converting the video data output from the field memories into analog video signal and providing the analog video signal in synchronization with the generated pseudo horizontal synchronizing signal. Therefore, in searching a video signal reproduced from a magnetic recording medium of a video recording/playback system, the skew due to a lost synchronizing signal can be prevented, thereby eliminating that cause of deterioration in picture quality.
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patent: 4939593 (1990-07-01), Yuuchi et al.
patent: 5089916 (1992-02-01), Kluth
patent: 5331415 (1994-07-01), Hamasaki et al.
Chevalier Robert
Samsung Electronics Co,. Ltd.
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