The Study And Algorithm Optimization Of Distortion Constrained Video Coding Technology

In this paper, a thorough study is carried out over the key algorithms of distortion constrained video codec, several optimization methods are proposed to enhance the coding speed and promote the applications of video coding in actual practice. The discussion is mainly focused on the mostly used video coding scheme: hybrid codec. The concept of "coding mode" being involved, the main problems in coding process are analyzed, structured software design method of hybrid codec is laid out and realization schemes for desk application and handheld application are presented then. To improve the hybrid codec, the paper has proposed a new method for organizing reference pictures and a new algorithm for mode-decision based on the conception of parallel operation and object-oriented coding, through which the complexity of coding process has been highly decreased. Furthermore, a novel fast motion estimation algorithm for low bit rate video coding is presented to cut down the percentage of motion prediction operation in the whole coding process.