Abstract:

Based on studying the motion estimation of multiblock mode and multireference frame, a novel fast search algorithm was presented in H.264. The algorithm judges the skip mode, which can reduce a lot of calculation and time. It selects the block mode according to the cost function of different motion search modes. At the same time, it decides the available reference frame used in the motion search. The experiment result shows that the proposed algorithm can decrease the search calculation and greatly improve the coding speed, while the peak signal noise ration (PSNR) of picture and bit rate change very little.

Key words: multiblock mode, multireference frame, fast search algorithm