System and method of adaptive rate control for a video encoder

Details System and method of adaptive rate control for a video encoder System and method of adaptive rate control for a video encoder

2006-05-12

2011-12-13

Diep, Nhon (Department: 2486)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

08077775

ABSTRACT:
A method of adaptively adjusting a QP of a video encoder to control output bit rate including estimating the QP based on a complexity of a previous frame and encoding bit rate information of a current frame to provide an estimated QP, determining a threshold value based on a video quality factor, a target bit rate and a complexity of a previous interval of the current frame or the same interval of the previous frame, and if the estimated QP is greater than the threshold value, adaptively adjusting the estimated QP using the threshold value, the target bit rate and the complexity of the previous interval. The method may include adaptively limiting a change of the QP between frame intervals based on a difference between the QP and the threshold value. Complexity information may be based on an average of minimum SAD values.

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