Abstract: Aiming at the multi-subblock mode selection problem in H.264 inter-frame prediction and multi-mode selection in intra-frame prediction, a practical fast mode selection algorithm based on statistical threshold is proposed. The selection range of coding modes is effectively limited by threshold setting. Experimental results of multiple video sequences show that the intra-frame prediction mode selection algorithm based on statistical threshold can greatly reduce the encoding time when the PSNR value of one frame has a slight change. The encoding time of one frame is reduced by 17%-23%, and the PSNR decreases by less than 0.4%. The inter-frame block mode selection algorithm based on statistical threshold makes the average PSNR value decrease by 0.047dB (the maximum PSNR decrease is less than 1%), but the encoder speed is increased by 20%-30% compared with full-mode prediction. [Author Abstract]
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