Instructs the speech recognizer on how to process the audio content.
Required. Sample rate (in Hertz) of the audio content sent in
the query. Refer to Cloud Speech API documentation
<https://cloud.google.com/speech-to-text/docs/basics>__ for
more details.
Optional. If true, Dialogflow returns [SpeechWordInfo][goo
gle.cloud.dialogflow.v2beta1.SpeechWordInfo] in [StreamingReco
gnitionResult][google.cloud.dialogflow.v2beta1.StreamingRecogn
itionResult] with information about the recognized speech
words, e.g. start and end time offsets. If false or
unspecified, Speech doesn't return any word-level information.
Optional. Context information to assist speech recognition.
See the Cloud Speech documentation
<https://cloud.google.com/speech-to-text/docs/basics#phrase-
hints>__ for more details.
Optional. Which variant of the [Speech model][google.cloud.dialogflow.v2beta1.InputAudioConfig.model] to use.