Method and apparatus for rate control in moving picture...

Details Method and apparatus for rate control in moving picture... Method and apparatus for rate control in moving picture...

2006-11-07

2006-11-07

Vo, Tung (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

07133448

ABSTRACT:
A total activity measure for a current picture to be encoded in a set of consecutive pictures of a video sequence is calculated first. Based on the total activity measure of the current picture and an activity-to-complexity ratio of a previously encoded picture of the same type in the set of consecutive pictures, a complexity measure of the current picture is estimated. With the estimated complexity measure of the current picture, an instantaneous complexity measure for the set of consecutive pictures is updated. A target bit budget is allocated to the current picture depending on the estimated complexity measure and the instantaneous complexity measure. The current picture is encoded according to the target bit budget, and the activity-to-complexity ratio for the current picture is computed based on the total activity, actual bits consumed by the current picture, and the average quantization step size of the current picture.

REFERENCES:
patent: 6600783 (2003-07-01), Morita et al.
patent: 2002/0118752 (2002-08-01), Oami
patent: 2004/0202247 (2004-10-01), Chang et al.
patent: 2004/0233984 (2004-11-01), Chang et al.
patent: 2004/0234142 (2004-11-01), Chang et al.
patent: 1278692 (2001-01-01), None

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