基于DSP的语音录放系统电路的设计.doc

城南学院 CHANGSHA UNIVERSITY OF SCIENCE TECHNOLOGY 毕业设计（论文） 题目 基于DSP的语音录放电路系统设计 学生姓名： 邓程萌 学 号： 200984250324 班 级: 258410903 专 业： 电子信息工程 指导教师： 王创新 2013 年6 月 基于DSP的语音录放电路系统设计 学生姓名： 邓程萌 学 号： 200984250324 班 级： 258410903 所在院(系): 电气与信息工程学院 指导教师： 王创新 完成日期: 2013.6 基于DSP语音录放电路系统的设计 摘要 以数字信号处理器(DSP)TMS320VC5402为核心处理器,设计了一个语音录放系统。该系统采用的数字编解码模块是由TLC320AD50芯片完成的,采用音频线,通过DSP内部的多通道缓冲串口(MCBSP)将电脑中的音频信号送到DSP中,DSP再将音频信号进行处理,通过TLC320AD50输出。最后,音频信号从耳机或外置喇叭传出。: DSP ； TMS320C5402；MCBSP； TLC320AD50C；语音录放 THE PROGRAMMING OF AUDIO COLLECTION AND RETURNBASED ON DSP ABSTRACT Based on the digital signal processor (DSP) TMS320VC5402 as the core processor, the design of a voice recording system. The system uses the digital coding and decoding module is completed by the TLC320AD50 chip, the audio line, through multi-channel buffered serial port (MCBSP) within the DSP audio signal in the computer is sent to the DSP, DSP and audio signal processing, output by TLC320AD50. Finally, the audio signals coming from the headphones or external speakers. In speech signal processing, recording and reproducing system is very important. Voice data compression, storage and analysis has shown its great usefulness. For voice recovery from mixed noise, digital filtering noise and joint time-frequency extraction is valid. Not only greatly improve the SNR of the reconstructed signal, the voice signal can be deleted, and some random noise seriously obscure most of the components. In most cases, to ensure clear voice, to help analyze.The DSP can handle a large number of signals fast processing speed, high ratio of performance to price, the high quality performance results as the core digital signal products, dependence and at this stage audio signal through the DSP treatment also increased. DSP chip using fast low cost and precision audio interface chip for processing audio signals, to meet the m