AVS編碼器在多標準視訊壓縮系統中之分析、設計與實現

Abstract

先進音視頻編碼--第二部份 (AVS-P2) 是由中國AVS工作組所制定的視訊編碼壓縮標準，該標準建立的目標是針對高清數位視訊廣播和高密度儲存媒體等高解析度之多媒體應用。而這篇論文提出了一個建構在多標準視訊編碼系統中，可實行AVS編碼的編碼器軟硬體架構設計。由於此AVS編碼器是建構在MPEG-4 ASP編碼器上以達到可支援MPEG-4和AVS雙重標準編碼之目的，因此主要設計考量是要節省額外成本使得此編碼系統能以低成本方式實現。在整個系統的設計過程中會採用到諸多相關技術，例如有效管線式排程、可重構式設計、針對硬體設計的預測技術、以及記憶體和邏輯運算單元的最大效率利用等。實驗結果顯示本論文提出的架構提供一個簡單、低成本而且可行的AVS編碼器設計方案。

Audio and Video Coding Standard - Part 2 (AVS-P2) is a video coding standard developed by the AVS Workgroup of China. It is a recently established standard suitable in applications such as high definition digital video broadcasting and high density storage media. In this thesis, coding algorithms and hardware architecture of AVS encoder are proposed for a multi-standard video coding system. Since the AVS encoder is constructed on an existing MPEG-4 Advance Simple Profile (ASP) encoder, the main design methodology is to minimize the additional cost constructed on the basic layer MPEG-4 encoder so that the overall system can be implemented with low cost. Several techniques have been adopted in the system such as efficient pipelining scheme, reconfigurable design, hardware-friendly prediction methods, and maximum reuse of (Arithmetic Logic Units) ALUs and local memory buffer. Simulation results show that our proposed scheme provides a simple and low cost implementation of AVS encoder in a multi-standard video coding system.