摘要
采用一片ＴＩ公司的数字信号处理芯片ＴＭＳ３２０Ｃ３１实现了ＭＰＥＧ－２音频Ｌａｙｅｒ－ｌ，Ｌａｙｅｒ－２的实时压缩编解码器。为了达到实时的目的，对ＭＰＥＧ建议的子带分析和子带合成方案分别提出了一种新的快速算法，采用该算法的运算量分别是ＭＰＥＧ标准建议算法运算量的１／５和１／１０。另外，对心理声学模型也做了一些有助于节省运算的改进。所有算法都经过了软件模拟和硬件实时仿真，通过仿真器装载到一片ＴＭＳ３２０Ｃ３１上实现了实时编解码运算。
This paper presents the implementation of real time compression codec on MPEG-2 audio layers1,2 using one digital signal processor TMS320C31 of TI Co.Ltd.. A new fast algorithm isproposed for sub--band analysis and synthesis method of MPEG for real time. The operation of this algorithm is 1/5 and 1/10 of MPEG respectively. And some improvement of operation reduction for thepsychological acoustics model is performed. All the algorithms have been simulated by software andimitated by hardware via imitator loaded in one TMS320C31 to implement real time codec operation.
出处
《电声技术》
北大核心
1999年第11期3-6,共4页
Audio Engineering
基金
国家自然科学基金
关键词
MPEG-2
音频编码
压缩编解码
算法
sub-band analysis filtration
sub--band synthesis filtration
psychological acousticsmodel
