Abstract: Using TI’s TMS320VC5502 and wavelet analysis technology, the paper implements the analysis and cancellation processed of audio signals within the high noise, creates the program infrastructure of audio signal sampling and processing based on DMA data transfer, double buffer switched and interrupt response mechanism under the control of DSP/BIOS. To the question of wavelet frequency band threshold noise cancellation, interface configuration between DMA and peripheral equipments, using method of DSP memory and so on, the paper presents concrete resolvents,which gives an efficient illustration for the research of related problems in the field of digital signal processing.

Key words: DSP; Wavelet analysis; Noise cancellation; TMS320VC5502

摘要： 利用TMS320VC5502 微处理器和小波分析技术，实现了对强噪声语音信号的分析与去噪处理，在DSP/BIOS 控制机制下建立了基于DMA、双缓冲区切换和中断响应机制等技术的音频信号采集与处理的程序框架，并对小波频带阈值去噪、DMA 与外设接口配置、DSP内存使用等问题提出了具体的解决方法，为数字信号处理领域相关问题的研究提供了有效例证。

关键词: DSP；小波分析；噪声消除；TMS320VC5502