Scene change detector for detecting a scene change of a moving p

Details Scene change detector for detecting a scene change of a moving p Scene change detector for detecting a scene change of a moving p

1993-06-28

1995-04-04

Chin, Tommy P.

Television

Image signal processing circuitry specific to television

Motion dependent key signal generation or scene change...

348412, 348415, H04N 7137

Patent

active

054041740

ABSTRACT:
A scene change detector for detecting a scene change of a moving picture reproduced by a series of frames of pictures, consists of a frame memory for storing a frame of picture from among the frames of pictures one after another, a switch for selectively passing a current frame stored in the frame memory after selectively passing a preceding frame stored in the frame memory, an activity calculating circuit for calculating a second activity of the current frame after calculating a first activity of the preceding frame, a first activity memory for storing the second activity after storing the first activity, a delay circuit for delaying the first second activity until the current frame is stored in the frame memory, a second activity memory for storing the first activity delayed in synchronism with the storage of the second activity in the first activity memory, and a scene change judging circuit for judging a scene change of the moving picture by comparing the both activities. The activity is defined as complexity of a frame of picture, and the scene change occurs in the current frame when the first activity greatly differs from the second activity.

REFERENCES:
patent: 5063608 (1991-11-01), Siegel
patent: 5260782 (1993-11-01), Hui
patent: 5267037 (1993-11-01), Sugiyama
patent: 5289190 (1994-02-01), Shimoda et al.
patent: 5305115 (1994-04-01), Takahashi et al.
"D.6.4.3.2 Intra
on-intra coding decision"; ISO/IEC 11172-2; 1993; pp. 96-97.

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