如何跟踪没有声音区域在WAV文件？ [英] How To Track No Sound Area In A Wav File?

问题描述

大家。
如何跟踪无声音部分的wav文件？
一个小软件什么，我想开发的deviding一个wav文件，并考虑没有音量区域作为deviding点。
程序怎么能知道一个wav文件的该卷是低？
我将使用Java或MFC。

everyone. How to track sections without sounds in a wav file? a small software what I want to develop is deviding a wav file, and it consider a no volume area as a deviding point. how can a program know that volume of a wav file is low? I'll use Java or MFC.

推荐答案

我通过计算信号的RMS曾与静音检测成功。这是通过以下方式完成的（假设有音频采样的阵列）：

I've had success with silence detection by calculating RMS of the signal. This is done in the following manner (assuming you have an array of audio samples):

    long sumOfSquares = 0;
    for (int i = startindex; i <= endindex; i++) {
        sumOfSquares = sumOfSquares + samples[i] * samples[i];
    }
    int numberOfSamples = endindex - startindex + 1;
    long rms = Math.sqrt(sumOfSquares / (numberOfSamples));

如果RMS是低于某一阈值时，可以考虑它是无声的。

if rms is below a certain threshold, you can consider it being silent.

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