面向SoC的数字音频解码系统设计方法  

SoC-oriented Design Methodology of Digital Audio Decoding System

作　　者：张轩磊[1] 窦维蓓[2] 董明[2] 

机构地区：[1]清华大学微电子所,北京100084 [2]清华大学电子工程系,北京100084

出　　处：《电声技术》2008年第8期72-76,共5页Audio Engineering

摘　　要：提出了一种将软件编程的灵活性和硬件模块的复用性相结合的设计方法,实现兼容多个音频解码的嵌入式音频解码系统。以软硬件协同设计的思想实现系统设计,建立了合理的系统框架和音频子系统的软硬件划分方案。本解码系统完成了实时音频解码,又保证标准音频解码器的精度要求。该设计方法通过了RTL验证和ADS(ARM Developer Suit)软件仿真,并在ARM7(Samsung SC44B0)和Xilinx Vertex Ⅱ FPGA(XC2V2000-6BG575C)的联合平台上得到了实时验证,达到了设计效果。To satisfy the requirements of both programmability and reusability, a design methodology to implement a compatible embedded digital audio decoding subsystem is proposed. With the SW/HW （software/hardware） codesign strategies, a way to set up the system frame and SW/HW architecture of the audio decoding subsystem is introduced. Based on the algorithm analysis and design strategies, the system could achieve real-time requirement, and the requirement of precision is fully satisfied. An evaluated ARMT＋FPGA platform is set up to test the chip with verification of RTL, software simulation based on ADS（ARM Developer Suit）. The expected effect which is shown by the verification of demo chip is obtained.

关 键 词：音频解码 SOC 软硬件协同设计 MP3 AAC 反量化 

分 类 号：TN912[电子电信—通信与信息系统]