MPEG-4 AAC解码器在NIOS II平台上的实现和优化  

Implementation and Optimization of MPEG-4 AAC Decoder Based on NIOS II

作　　者：潘岳[1] 王建中[1] 戎蒙恬[1] 刘文江[1] 

机构地区：[1]上海交通大学信息安全学院,上海200240

出　　处：《电声技术》2006年第11期46-49,共4页Audio Engineering

基　　金：国家自然科学基金委创新群体基金项目(60521002);上海应用材料研究与发展项目资助(0501)

摘　　要：给出了MEPG-4AAC实时解码器在NIOSII平台的实现方案,介绍了MPEG-4AAC-LC解码算法及各关键模块优化算法。在完成实时解码要求下,结合NIOSII平台特性,对解码器在软件代码与处理器上进行优化。实验结果表明CPU时钟为80MHz时能达到实时解码要求。The implementation of MEPG-4 AAC real-time decoder based on NIOS II is presented. The brief decoder algorithm of MPEG-4 AAC and the techniques to optimize some key modules are introduced. To obtain the request of real-time decoder, the decoder on software code and processor with the features of NIOS Ⅱ is optimized. The experimental results show that the decoder satisfies the real-time request.

关 键 词：MPEG-4 AAC NIOS Ⅱ 音频解码器 

分 类 号：TN912.3[电子电信—通信与信息系统]