How to get spoken Language in audio file with Azure Speech sdk in C#?

Matteo Gianfermi 0

Hi,

I need to detect what's spoken language in an audio file. I have already read the documentation about language identification for speech service but in the SpeechRecognitionResult object result I don't have the recognized language code.

Is there a way to achieve this goal or after have called speech to text service, I have to call the language detection feature in text analytics service to get the language code?

Regards

VasaviLankipalle-MSFT 14,831 Reputation points

2024-05-08T00:07:07.0766667+00:00

Hello @Matteo Gianfermi , Thanks for using Microsoft Q&A Platform.

I have reproduced in the Speech Studio, when language identification is enabled, the language code appears in the JSON. Is this something you are looking for?

Matteo Gianfermi 0

Hello @VasaviLankipalle-MSFT , thanks for your answer.

I implemented azure speech language identification feature in my code following Microsoft documentation.

This is my code:

var audioFile = req.Form.Files[0];

var speechConfig = SpeechConfig.FromSubscription("**********", "**********");
speechConfig.SetProperty(PropertyId.SpeechServiceConnection_InitialSilenceTimeoutMs, "5000");
speechConfig.SetProperty(PropertyId.Speech_SegmentationSilenceTimeoutMs, "5000");

var autoDetectSourceLanguageConfig = AutoDetectSourceLanguageConfig.FromLanguages(new string[] { "en-US", "de-DE", "zh-CN" });

byte channels = 1;
byte bitsPerSample = 16;
uint samplesPerSecond = 16000;
var audioFormat = AudioStreamFormat.GetWaveFormatPCM(samplesPerSecond, bitsPerSample, channels);
var audioConfigStream = new PushAudioInputStream(audioFormat);
var audioConfig = AudioConfig.FromStreamInput(audioConfigStream);

var speechRecognizer = new SpeechRecognizer(speechConfig, autoDetectSourceLanguageConfig, audioConfig);

audioFile.Headers.Clear();
var bytes = ConvertToByteArrayContent(audioFile);
audioConfigStream.Write(bytes);
audioConfigStream.Close();

var speechRecognitionResult = await speechRecognizer.RecognizeOnceAsync();

In the "speechRecognitionResult" object I don't have the spoken language code, I have only the transcription text. In the example above, I suggest three candidate languages, I'd like to know which one of them the service has recognized.

Matteo Gianfermi 0 Reputation points

2024-05-08T07:58:52.4466667+00:00

Best regards

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How to get spoken Language in audio file with Azure Speech sdk in C#?