低成本SoC平台MPEG-4 AAC解码器优化策略  

Optimization Strategy of MPEG-4 AAC Decoder on a Low-cost SoC

作　　者：高谷刚[1] 时龙兴[1] 浦汉来[1] 周凡[1] 

机构地区：[1]东南大学国家专用集成电路系统工程技术研究中心,南京210096

出　　处：《中国工程科学》2007年第10期60-64,79,共6页Strategic Study of CAE

基　　金：国家自然科学基金(60676011;90407009);高等学校博士学科点专项科研基金(20050286040);教育部跨世纪优秀人才培养计划基金

摘　　要：提出了在低成本SoC平台的软件优化策略,包括基于统计分析的浮点到定点转换策略和面向性能优化的片上存储器容量定制策略,在此基础上针对计算密集性应用提出了完整的优化方法。通过实现MPEG-4 AAC实时解码,表明该优化策略在性能和成本方面的有效性。这一策略与方法也适合其他DSP应用。This paper proposes software optimization strategies using a low-cost SoC which include float- point to fix-point conversion scheme based on statistical analysis and performance oriented customizing scheme for on-chip memory＇s capacity, and presents optimization methodology based on these strategies for computation intensive applications, the MPEG- 4 AAC decoding efficiency of the proposed optimization strategy in both be used to optimize other DSP applications. in real-time is implemented as a case study to illustrate the performance and cost. The strategy and methodology also can be used to optimize other DSP applications.

关 键 词：软件优化 SOC 浮点到定点转换 片上存储器 AAC 

分 类 号：TN47[电子电信—微电子学与固体电子学]