关键词: 移动终端, H.264, 全零块检测, 模式选择, 提前终止

Abstract: According to the calculation shortage of mobile terminal, a fast inter-frame mode decision algorithm which has high-performance and low-complexity is proposed. According to the characteristics of the 4×4 integer DCT transform, an early termination strategy of motion estimation based on all-zero block detection is proposed. Furthermore, the all-zero macroblock detection is applied to the H.264 fast mode selection. The experimental results show that the proposed algorithm can effectively reduce the H.264 encoding computation. It can accelerate the encoding speed to 31.84%, the biggest can reduce encoding time by 63.82%, while in keeping with the rate distortion performance basically unchanged.

Key words: mobile terminals, H.264, all-zero block detection, mode selection, early termination