musicam meaning in English
压缩编码和
Examples
- In the next , we discuss the system of the meg - 1 layer i . the paper centers on the two kernel sub - parts : filtering coding and psychoacoustic model , do some research work in sub - band coding ( cbc ) theory and the relate theory such as quadrature mirror filter ( qmf ) and analyse sub - band filter ; also do research work in psychoacoustic theory especially the part related to the mpeg - 1 layer i . in the third chapter , introduce the ti tms320c6000 series dsps and their characteristics , also about the software development flow and the ti dsp / bios operating system of it . the forth chapter is the most important , firstly , according the algorithm flow in protocol , using c language validate the algorithm ; then , transplant and optimize the coding in dsp . in the processing of optimize , acording the assembler program characteristic of ti dsp , the paper put forward the analyse sub - band filter dsp optimization algorithm base on the eight spot idct . the algorithm has been optimize have greatly improved the work efficiency . make use of the technology of the dsp / bios host channels , data io pipe , software interrupt , we implement the musicam algorithm base on dsp / bios
论文首先对当前语音编码技术的发展、分类以及mpeg系列音频标准作了介绍；接着在第二章，给出了layer的musicam ( masking - patternuniversalsubbandintegratedcodingandmultiplexing )算法的系统组成，围绕分析子带滤波器和心理声学模型两个核心模块，深入研究了子带编码工作原理、比特分配及子带编码中用到的正交镜像滤波器和分析子带滤波器；探讨了心理声学基本原理和mpeg . 1layer所用到的心理声学模型。第三章对titms320c6000系列dsp作了简介，介绍了6000系列dsp结构特点、 c6000dsp软件开发流程和tidsp / bios操作系统。第四章是本文的重点，首先根据协议给出的算法用标准c语言编程实现并调试通过。