语音数据采集-实时语音数据可视化

用户9925864

发布于 2022-07-27 09:30:23

1.8K0

发布于 2022-07-27 09:30:23

1、安装依赖

pip install pyaudio
pip install pylab

2、语音数据展示

import pyaudio
import numpy as np

CHUNK = 4096 # 每次采集的数据点数
RATE = 44100 # 采样频率

p=pyaudio.PyAudio() # 启动类
stream=p.open(format=pyaudio.paInt16,channels=1,rate=RATE,input=True,
              frames_per_buffer=CHUNK) #输入设备

# 创建一个numpy来保存每次采集的数据
for i in range(10): #
    data = np.fromstring(stream.read(CHUNK),dtype=np.int16)
    print(data)

# 关闭音频采集流
stream.stop_stream()
stream.close()
p.terminate()

3、声音波形可视化

首先采集数据，然后保存为图片，新建一个网页，在网页上展示波形图

import pyaudio
import numpy as np
import pylab
import time

RATE = 44100
CHUNK = int(RATE/20) 

def soundplot(stream):
    t1=time.time()
    data = np.fromstring(stream.read(CHUNK),dtype=np.int16)
    pylab.plot(data)
    pylab.title(i)
    pylab.grid()
    pylab.axis([0,len(data),-2**16/2,2**16/2])
    pylab.savefig("03.png",dpi=50)
    pylab.close('all')
    print("took %.02f ms"%((time.time()-t1)*1000))

if __name__=="__main__":
    p=pyaudio.PyAudio()
    stream=p.open(format=pyaudio.paInt16,channels=1,rate=RATE,input=True,
                  frames_per_buffer=CHUNK)
    for i in range(int(20*RATE/CHUNK)): #持续10s
        soundplot(stream)
    stream.stop_stream()
    stream.close()
    p.terminate()

网页代码

<html>
<script language="javascript">
function RefreshImage(){
document.pic0.src="03.png?a=" + String(Math.random()*99999999);
setTimeout('RefreshImage()',50);
}
</script>
<body onload="RefreshImage()">
<img name="pic0" src="03.png">
</body>
</html>

效果如图