Scene change detection

Details Scene change detection Scene change detection

1997-11-25

2000-08-08

Tung, Bryan

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

348416, 348700, H04N 736

Patent

active

06101222&

ABSTRACT:
A scene change detector sums the correlation maximum values of correlation surfaces produced by a motion vector determining circuit (2) across a current image and compares this with a threshold value (Thres) to detect scene changes. A statistical analysis of signals (V.sub.x, V.sub.y, Y) representing the current image may be made and a resulting value differentiated. Peaks in this differentiated value represent scene changes. Finally, rapid changes in the number of valid vectors found in a motion analysis of a current image may also be used to indicate a scene change.

REFERENCES:
patent: 4992869 (1991-02-01), Samad
patent: 5146228 (1992-09-01), Irani
patent: 5347312 (1994-09-01), Saunders

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