Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1996-10-25
1999-12-21
Nguyen, Huy
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386 88, H04N 595
Patent
active
060060069
ABSTRACT:
A frame pulse generation apparatus for a SD-VCR generates a correct frame pulse even though a track pair number differs from an original one due to an error, to obtain an accurate picture. A frame base pulse generator compares the track pair number detected from a reproduced signal with a reference number and generates a frame base pulse toggled whenever the comparison result represents consistency. A phase-locked-loop (PLL) circuit controls the phase and period of the generated frame base pulse to be constant, and outputs a final frame pulse. The apparatus also greater a reference frame pulse a stable clock obtained by dividing the system clock and controlling the rotational speed of a drum so that track pair number detected at the level transition point of the reference frame pulse becomes a desired number, in order to contain one-frame data within the reference frame pulse. Thus, a normal reproduced picture can be formed irrespective of errors.
REFERENCES:
patent: 4745493 (1988-05-01), Gedl et al.
patent: 5648879 (1997-07-01), Takano
Nguyen Huy
Samsung Electronics Co,. Ltd.
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