| 摘要 |
A prediction mode selection method, apparatus and system, which falls within the field of video coding. The method comprises: screening a first group of candidate intra-frame chroma prediction modes of a current prediction unit in N intra-frame prediction modes; respectively performing prediction residual cost calculation on the first group of candidate intra-frame chroma prediction modes to obtain a difference evaluation value; screening a second group of candidate intra-frame chroma prediction modes according to the difference evaluation value; respectively performing coding cost calculation on the second group of candidate intra-frame chroma prediction modes to obtain a coding cost value; and determining an intra-frame chroma prediction mode with the minimum coding cost as a final intra-frame chroma prediction mode according to the coding cost value. Since the calculation amount of a difference evaluation value is 1/6-1/4 of the calculation amount of a coding cost value, the effects of effectively reducing the calculation amount and improving the coding efficiency are achieved. |
