Scene change detecting device

Details Scene change detecting device Scene change detecting device

1996-08-21

1997-06-24

Chin, Tommy P.

Television

Image signal processing circuitry specific to television

Motion dependent key signal generation or scene change...

348699, 348416, 348415, 348701, 386 4, H04N 732

Patent

active

056421745

ABSTRACT:
A scene change detecting device of a relatively small circuit scale is capable of accurately detecting a scene change using data which have already been compressed and coded. The scene change detecting device has an extracting circuit for extracting frame type information, frame identification information, and block type information from a coded signal of a moving picture which has been processed by block-adaptive interframe predictive coding. The block type information is sent to a counter, and the frame type information and the frame identification information are sent to a frame estimating circuit. Based on the block type information, the counter counts macroblocks with respect to each of the types of predictive processes over one frame. The frame estimating circuit estimates a frame immediately following a scene change based on the counted number of macroblocks with respect to each of the types of predictive processes, the frame type information, and the frame identification information.

REFERENCES:
patent: 5032905 (1991-07-01), Koga
patent: 5099322 (1992-03-01), Gove
patent: 5267037 (1993-11-01), Sugiyama
patent: 5404174 (1995-04-01), Sugahara
patent: 5436664 (1995-07-01), Henry
patent: 5459517 (1995-10-01), Kunitake et al.
patent: 5493345 (1996-02-01), Ishikawa et al.

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