Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1994-10-03
1997-01-14
Tran, Thai Q.
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386 91, H04N 595, H04N 578
Patent
active
055945538
ABSTRACT:
A first reference signal having a predetermined frequency is added to a video signal for a predetermined period of time. A second reference signal is further added to the video signal such that it delimits a starting point and length of the video information. The video signal, with the added reference signals, is recorded on a recording medium, such as a magnetic disk rotated by a spindle motor. The recorded video signal with the added reference signals is reproduced from the recording medium, and the first reference signal is extracted from the video signal. The video signal is stored in a memory using the timing characteristics of the extracted first reference signal, and stored over a time period which is based upon the second reference signal. The stored video signal is then read from the memory using a known clock rate. The first reference signal extracted from the reproduced video signal contains jitter information representative of speed fluctuations of the spindle motor. Thus, the jitter of the video signal is eliminated when the video signal is stored in the memory on the basis of the timing characteristics of the first reference signal.
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Asahi Kogaku Kogyo Kabushiki Kaisha
Tran Thai Q.
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