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vad.js

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Voice activity detection in Javascript

// repository documentation

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# Voice activity detection in Javascript

__vad.js__ is a small Javascript library for voice activity detection.

### Quick Start

```html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>VAD Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body>
<script type="text/javascript" src="lib/vad.js"></script>
<script type="text/javascript">
  // Create AudioContext
  window.AudioContext = window.AudioContext || window.webkitAudioContext;
  var audioContext = new AudioContext();

// Define function called by getUserMedia 
  function startUserMedia(stream) {
    // Create MediaStreamAudioSourceNode
    var source = audioContext.createMediaStreamSource(stream);

// Setup options
    var options = {
     source: source,
     voice_stop: function() {console.log('voice_stop');}, 
     voice_start: function() {console.log('voice_start');}
    }; 
    
    // Create VAD
    var vad = new VAD(options);
  }

// Ask for audio device
  navigator.getUserMedia = navigator.getUserMedia || 
                           navigator.mozGetUserMedia || 
                           navigator.webkitGetUserMedia;
  navigator.getUserMedia({audio: true}, startUserMedia, function(e) {
          console.log("No live audio input in this browser: " + e);
  });
</script>
</body>
</html>
```

### Tested - Browser
* Firefox 45.0a1+

##Author

* Kelly Davis kdavis@mozilla.com
* Mark Panaghiston https://github.com/thepag

##Thanks
The code is based on the following implementations:

+ https://github.com/happyworm/Playful-Demos

##Contribution

Any contribution will be welcome!

vad.js

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