Recording and playback system for variable speed playback wherei

Details Recording and playback system for variable speed playback wherei Recording and playback system for variable speed playback wherei

1995-11-14

1997-11-25

Chin, Tommy P.

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 33, 386 68, 386111, H04N 979, H04N 1102, H04N 591, H04N 5917

Patent

active

056920920

ABSTRACT:
A digital VTR which is able to record a band-compressed signal having a bit-rate of 17 to 60 Mbps of a program while creating a low-bit-rate signal (1.5 to 5 Mbps) having the same program content as well as utilizing the low-bit-rate signal as a signal for the special playback. Variable speed playback data for a certain speed, which is recorded in the limited recording areas for variable-speed playback mode, is adapted to be used for playback at another speed in the variable-speed playback mode. The data structure of variable-speed playback data is adapted to change depending on the image areas on the image frame. Either of these embodiments or the combination of them, improves the quality of a reproduced picture during variable-speed playback mode in which a less amount of data is available than that of data read out at the time of a normal playback mode.

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"Data Selection Strategies for Digital VCR Long Play Mode" by J. M. Boyce, IEEE Transactions on Consumer Electronics 40 (1994) Aug., No. 3, pp.269-273.
A Study On Digital VCR System for ATV in the U.S.A., Technical Report of the Institute of Television Engineers of Japan, VR 93-55, vol. 17, No. 59, pp. 7-13.

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