Provides information to the recognizer that specifies how to process the request.
Sample rate in Hertz of the audio data sent in all
RecognitionAudio messages. Valid values are: 8000-48000.
16000 is optimal. For best results, set the sampling rate of
the audio source to 16000 Hz. If that's not possible, use the
native sample rate of the audio source (instead of re-
sampling). This field is optional for FLAC and WAV audio
files, but is required for all other audio formats. For
details, see [AudioEncoding][google.cloud.speech.v1p1beta1.Rec
ognitionConfig.AudioEncoding].
This needs to be set to true explicitly and
audio_channel_count > 1 to get each channel recognized
separately. The recognition result will contain a
channel_tag field to state which channel that result
belongs to. If this is not true, we will only recognize the
first channel. The request is billed cumulatively for all
channels recognized: audio_channel_count multiplied by the
length of the audio.
A list of up to 3 additional BCP-47 <https://www.rfc-
editor.org/rfc/bcp/bcp47.txt> language tags, listing
possible alternative languages of the supplied audio. See
Language Support <https://cloud.google.com/speech-to-
text/docs/languages> for a list of the currently supported
language codes. If alternative languages are listed,
recognition result will contain recognition in the most likely
language detected including the main language_code. The
recognition result will include the language tag of the
language detected in the audio. Note: This feature is only
supported for Voice Command and Voice Search use cases and
performance may vary for other use cases (e.g., phone call
transcription).
If set to true, the server will attempt to filter out
profanities, replacing all but the initial character in each
filtered word with asterisks, e.g. "f***". If set to
false or omitted, profanities won't be filtered out.
If true, the top result includes a list of words and the
start and end time offsets (timestamps) for those words. If
false, no word-level time offset information is returned.
The default is false.
If 'true', adds punctuation to recognition result hypotheses. This feature is only available in select languages. Setting this for requests in other languages has no effect at all. The default 'false' value does not add punctuation to result hypotheses. Note: This is currently offered as an experimental service, complimentary to all users. In the future this may be exclusively available as a premium feature.
If set, specifies the estimated number of speakers in the conversation. Defaults to '2'. Ignored unless enable_speaker_diarization is set to true. Note: Use diarization_config instead.
Metadata regarding this request.
Set to true to use an enhanced model for speech recognition.
If use_enhanced is set to true and the model field is
not set, then an appropriate enhanced model is chosen if an
enhanced model exists for the audio. If use_enhanced is
true and an enhanced version of the specified model does not
exist, then the speech is recognized using the standard
version of the specified model.