python手记(43)

>>> runfile(r'K:\testpro\test.py', wdir=r'K:\testpro')
http://blog.csdn.net/myhaspl
[email protected]


working...

>>> 

python对声音处理

显示一段语音的波形

#!/usr/bin/env python  
# -*- coding: utf-8 -*-
#http://blog.csdn.net/myhaspl  
#code:[email protected] 
import wave
import pylab as pl
import numpy as np

print 'http://blog.csdn.net/myhaspl'  
print '[email protected]'  
print  
  
print 'working...' 
# 打开WAV文档
f = wave.open(r"speak.wav", "rb")
# 读取格式信息
# (nchannels, sampwidth, framerate, nframes, comptype, compname)
params = f.getparams()
nchannels, sampwidth, framerate, nframes = params[:4]
# 读取波形数据
str_data = f.readframes(nframes)
f.close()
#将波形数据转换为数组
wave_data = np.fromstring(str_data, dtype=np.short)
wave_data.shape = -1, 2
wave_data = wave_data.T
time = np.arange(0, nframes) * (1.0 / framerate)
# 绘制波形
pl.subplot(211)
pl.plot(time, wave_data[0])
pl.subplot(212)
pl.plot(time, wave_data[1], c="g")
pl.xlabel("time (seconds)")
pl.show()

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