摘要
针对会议系统产生的啸叫,设计了一种基于DSP的语音啸叫处理系统。系统硬件选用了DSP芯片TMS320VC5509A作为处理核心,音频Codec芯片TLV320AIC23作为语音信号的输入/输出和模/数转换器件;数据的传输方式采用DMA控制方式,并结合乒乓缓存,其优点是无需CPU的干预,且CPU在等待DMA传输数据的过程中可以完成其他工作;系统采用自适应声反馈抑制方法对啸叫进行处理,该方法的原理是通过LMS算法调整陷波系数实现对啸叫的抑制。经过实验验证,系统可以实现语音信号的输入与输出,同时有效地抑制啸叫。
A voice howling processing system based on DSP is designed in this paper.DSP chip TMS320VC5509A is selected as the processing core,and audio Codec chip TLV320AIC23 is used as the input/output and analog/digital conversion device of voice signal.The data transmission mode adopts the DMA control mode and combines the ping-pong buffer.The advantage is that no CPU intervention is required,and the CPU can perform other work while waiting for the DMA to transfer data.The system adopts the adaptive acoustic feedback suppression method to deal with the noise.The principle of this method is to realize the noise suppression by adjusting the notch coefficient through the LMS algorithm.Experimental results show that the system can realize the input and output of speech signal and effectively suppress the noise.
作者
何山
王福增
吴太武
江青林
HE Shan;WANG Fuzeng;WU Taiwu;JIANG Qinglin(College of Electronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China)
出处
《成都信息工程大学学报》
2019年第5期487-490,共4页
Journal of Chengdu University of Information Technology
