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.
If true, Dialogflow returns [SpeechWordInfo][google.cloud.
dialogflow.v2beta1.SpeechWordInfo] in [StreamingRecognitionRes
ult][google.cloud.dialogflow.v2beta1.StreamingRecognitionResul
t] 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.
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.
Which variant of the [Speech
model][google.cloud.dialogflow.v2beta1.InputAudioConfig.model]
to use.