Simple and quick merging method

The invention discloses a simple and quick merging method. The method comprises the following steps: obtaining depth and quantization parameter information of a current coding unit; calculating an optimal rate-distortion threshold value of the current coding unit according to the depth and quantization parameter information; obtaining candidate blocks in sequence in a candidate list and entering the rate-distortion optimization process; setting motion compensation parameters; carrying out motion compensation; carrying out residual coding and rate-distortion calculating; keeping relevant information of the optimum block; if the selected candidate block enables the rate distortion to be smaller than the pre-calculated optimal rate-distortion threshold value, ending the process; and if the selected candidate block enables the rate distortion to be larger than or equal to the pre-calculated optimal rate-distortion threshold value, and some candidate blocks are still not inspected, selecting the next candidate block and repeating the rate-distortion optimization process, or otherwise, ending the rate-distortion optimization process. The method can select appropriate merging unit blocks quickly to accelerate the speed of a Merge mode, and overall coding efficiency is improved.