Research Of MUSICAM Algorithm And DSP Implementation

For different applications, the audio part of MPEG-1 provides three layers;we select the implementation of the first layer on the TI TMS320 DSP considering the complexity of the algorithm and the quality of voice.In first, the development and categories of speech coding and the standard of the MPEG series has been described. 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.