提交一段录制语音，录音内容 : 数字0~9 和 本人姓名。格式为单声道、16KHz 采样、

16Bits 的线性PCM 数据。录音要求发音平稳，匀速，音量适中（最大幅度要超过3000）。录

音数据按照WAVE 文件格式存放。文件名由和姓名组成: 学号_姓名.wav

1）编写程序(MathLab)，读出所录制的数据。统计文件信号的直流分量，消除直流后显示波

形。

2）编写程序（MathLab）以100 帧/秒的频度（即帧移10mS），分析并显示录音文件的短时

过零率及短时能量，分析帧长20mS。

3）在根据短时能量和过零率曲线，波形图上分别标出10 个数字及姓名语音的起始和结束位

置。-Submit a recorded voice recording: numbers 0 to 9, and his or her name. Format is mono, 16KHz sampling, 16 bits linear PCM data. Recording requires a smooth, uniform pronunciation, the most significant moderate volume (more than 3000). Recording data stored in the WAVE file format. The file name and name: Student ID _ Name WAV 1) programming (MathLab), read out the recorded data. Display the waveform the statistics file the DC component of the signal, after the elimination of DC. 2) programming (MathLab) the frequency of 100 frames/sec (ie frame shift 10mS), and shows the recording file short-time zero-crossing rate and short-term energy, analysis frame length 20mS. 3) according to the short-time energy and zero-crossing rate curve on a waveform diagram, respectively marked 10 digits and name of the voice starting and ending position.