Method for distributing video image set bit based on H.264
A video image and bit allocation technology, applied in image communication, digital video signal modification, television, etc., can solve the problems of poor image quality, out-of-control video bit rate, different bit stream sizes, etc., and achieve stable image quality and rate distortion. Optimize and realize the effect of rate control
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[0053] refer to Figure 1 ~ Figure 3 , implement a kind of video image group bit allocation method based on H.264, be applied in the video image coder that carries out code rate control to the video stream of real-time encoding, comprise the following steps, see figure 2 :
[0054] A, estimate the approximate value of the quantitative parameter mean value QPm of the first frame of video stream GOP, be set to QPi;
[0055] B. Encoding the I frame in the video stream GOP;
[0056] C. Statistically calculate the current output code rate;
[0057] D. Adjust the QP value of the subsequent B frame or P frame according to the code rate calculated in step C;
[0058] E. Coding the B frame or the P frame;
[0059] F. When the video stream is not over, turn to step C again;
[0060] G. The video stream ends.
[0061] In the above implementation method, the average value QPm of the quantization parameter in the step A is an integer value after rounding and rounding a real number. ...
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