MPEG-4 AAC心理声学模型在TMS320C6416上的实现  

The Implementation of MPEG-4 AAC Psycho-Acoustic Model Based on TMS320C6416

作　　者：胡凤萍[1] 

机构地区：[1]西安电子科技大学ISN国家重点实验室,西安710071

出　　处：《北京电子科技学院学报》2007年第4期74-76,91,共4页Journal of Beijing Electronic Science And Technology Institute

摘　　要：心理声学模型是MPEG-4AAC音频编码器中最重要的部分之一。本文首先介绍了心理声学模型的作用,基本原理和算法流程,然后结合定点DSP芯片TMS320C6416的特点,详细说明了心理声学模型模块的定点化方法及其优化设计方法。测试结果表明,在保证音频编码质量的前提下,算法的精度和运行速度都得到了很大的提高。This paper presents the function, fundamental principle and algorithm flow of the psycho-acoustic model, which is one of the most important parts of MPEG-4 Advanced Audio Coding (AAC). Then based on the particular features of the DSP chip TMS320C6416, the fixed -point program and the optimization of the psycho-acoutic module in AAC is discussed in detail. Test results show that the precision and the speed of the algorithm are improved greatly, with the quality of audio guaranteed.

关 键 词：MPEG-4 AAC 心理声学模型 TMS320C6416 优化设计 

分 类 号：TN912.3[电子电信—通信与信息系统]