SpeechRecognitionAlternative: confidence property
The confidence
read-only property of the SpeechRecognitionResult
interface returns a numeric estimate of how confident the speech recognition system is that the recognition is correct.
Note: Mozilla's implementation of confidence
is still being worked on — at the moment, it always seems to return 1.
Value
A number between 0 and 1.
Examples
This code is excerpted from our Speech color changer example.
recognition.onresult = (event) => {
const color = event.results[0][0].transcript;
diagnostic.textContent = `Result received: ${color}.`;
bg.style.backgroundColor = color;
console.log(`Confidence: ${event.results[0][0].confidence}`);
};
Specifications
Browser compatibility
|
Desktop |
Mobile |
|
Chrome |
Edge |
Firefox |
Internet Explorer |
Opera |
Safari |
WebView Android |
Chrome Android |
Firefox for Android |
Opera Android |
Safari on IOS |
Samsung Internet |
confidence |
33 |
79 |
No |
No |
No |
14.1 |
4.4.3 |
33 |
No |
No |
14.5 |
2.0 |
See also