【摘要】 采用一片美国 TI公司的数字信号处理芯片 TMS3 2 0 C3 1实现了 MPEG-2音频 Layer-1、2实时压缩编解码器。为了达到实时的目的 ,对 ISO/IEC 1 1 1 72 -3建议的子带分析方案提出了一种新的快速算法。采用该快速算法 ,可以使子带分析的运算量降低 5倍。仿真实验表明 ,采用快速算法后 ,用一片 TMS3 2 0 C3 1可以达到实时编码更多还原

【Abstract】 A real-time MPEG-2 layer 1&2 audio coder realized on one TMS320C31 is developed. In order to realize the coder real-time, a new fast algorithms for MPEG-2 audio sub-band analysis filter is presented. The algorithm can reduce calculation work of sub-band analysis to 1/5 of that processed by algorithm ISO/IEC 11172-3 recommended. Software and hardware simulation of the algorithm is made. Through a simulator the programs are loaded on a TMS320C31. The MPEG audio coder is realized in real time.更多还原