The method of transcoding from h.264 / avc standard to standard fast intra hevc transcoder and

The present invention discloses a method from H.264 / AVC standard to fast intra HEVC standard transcoding method and a transcoder main content comprising: into H.264 / AVC standard code stream to the H.264 / AVC standard decoded in decoder; based on information obtained by decoding to convert the H.264 / AVC standard macroblock structure coding unit, a prediction unit HEVC standard format, and in accordance with block HEVC standard mode, again according to the order zorder sorting; intra prediction mode of H.264 / AVC standard blocks extracted in each size corresponding to the intra prediction mode HEVC standard; H.264 / AVC standard 16 × 16,8 × 8,4 × 4 of dimensions size of a block on a block level directly determined using standard calculations HEVC intra prediction mode; frame by comparing the RD optimum size of the block of the present hierarchy optimum intra prediction mode and the block size on a level of a prediction mode -cost value, to select the final intra prediction mode. In the present invention, the bit rate and video quality loss is very small, drastically reduces the computational complexity of the coding.