A New Architecture of Video Encoding Method For Low Bandwidth Application

• Main Authors: Yao-wen Hsu, 許耀文
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/46882823440237234145

碩士 === 逢甲大學 === 資訊電機工程碩士在職專班 === 94 === Video compression has been an active research area in the last decade. Amongst many proposed methods, motion compensated coding has taken the most attention and taken its place in many standards (Mpeg, H.26L, etc…) The main difference between motion compensated coding and image based coding schemes such as DWT is that motion compensated coding exploits temporal redundancies between consecutive frames, i.e., between two frames. In this paper, we propose a new architecture of Video encoding method for low bandwidth application. The new architecture video codec consists of three main modules, the 3-D DWT transform module that performs an energy compaction of a group of video frames and the modified 3-D listless zero-tree coding module that further codes the transformed video frames. When executing the modified 3-D listless zero-tree coding module, the 3-D asymmetric parent-child relations are used for sorting the 3-D wavelet coefficients more effectively. Advantageous features of the new architecture video codec include low computational complexity, memory-efficient, and fasting motion vector search. To evaluate the proposed video codec, we have compared it with the 3-D methods to video codec proposed by Gokturk and Aaron. Extensive simulations have been conducted. The simulation results show that a fasting search is obtained with this video codec compared to the 3-D methods to video codec.