Dynamic magnetic information storage or retrieval – Record editing
Patent
1994-10-25
1996-07-30
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Record editing
360 103, 360 61, 358312, H04N 578
Patent
active
055417809
ABSTRACT:
Helical-scan video tape playback apparatus compensates for the skew generated during special reproduction operations (e.g., search functions) in the long-play mode. Video reproducing circuitry generates a first video signal; and a delay line supplies a second video signal in delayed response to the first video signal, the delay being one-half a horizontal scan line. During special reproduction operations in the long-play mode, a skew compensating device supplies an output video signal responsive to the first video signal when a first condition of a skew jump indication signal obtains and responsive to the second video signal when a second condition of the skew jump indication signal obtains. A frequency divider responds to an envelope comparison signal generated by comparing with a prescribed level the signals picked up by long-play heads and generates a square wave the fundamental frequency of which is half that of the envelope comparison signal. The prescribed level for such comparing can be furnished from signals picked up by standard-play heads.
REFERENCES:
patent: 4445145 (1984-04-01), Moriya
patent: 4623940 (1986-11-01), Matsumoto et al.
patent: 5245482 (1993-09-01), Sagawa et al.
Samsung Electronics Co,. Ltd.
Sniezek Andrew L.
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