Research On AVS Video Decoding And Optimization Of Decoding Key Module

Video compressed coding technology is a key in the multimedia signal processing area, and is used in many fields such as DVD, HDTV, Visible telephone, digital video meeting and so on. With the development of video compressed coding technology, some International groups have brought forward a lot of standards.As our nation uses this technology, we also face a serious problem that must pay a lot of money to the patent. So, an organization named as"AVS standard working group"is founded and brought forward Audio Video Coding Standard (AVS). This standard has many good characteristics, including good performance, low complexity algorithm, low implementation cost, simplified patent warranty and so on. We have reason to forecast that AVS can find many application fields. This project is brought forward in the background of AVS industrialization.The main task of this paper is to implement and optimize the AVS video decoder on the TMS320DM642 DSP. On the base of the study and research on AVS coding standard, we raise the design flow of AVS video decoder. Then improve the open code of AVS video decoder on PC which supplies a base for the implement on DSP. At last, we replant the C code into DM642 and optimize it by some ways, such as compiler optimization, software pipeline technology and so on. After the optimization, the performance of decoder is improved greatly.