An Optimal Rate Control Algorithm for HEVC Inter Frame Based on SVM

HEVC achieves much higher coding efficiency compared with previous coding standards, but its encoding performance needs to be improved. This paper optimizes the problem of the unreasonable bit allocation in HEVC inter frames at CTU level by designing an optimal rate control algorithm for HEVC inter frame Based on SVM. The proposed algorithm classifies different CTUs in inter frames into three classes according to R-D relationship to improve the prediction accuracy of rate-distortion model, and then adjusts the bit allocation of CTUs, which can make the bit allocation more reasonable and improve the output video quality with limited bandwidth. Experimental results show that the proposed method can improve the quality of Coded Videos with the increase of PSNR by 0.18dB while maintaining stable bitrate.