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 and 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.
Optional 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 </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).
Optional 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.
Optional 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.
Optional 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.
Optional If set, specifies the estimated number of speakers in the conversation. If not set, defaults to '2'. Ignored unless enable_speaker_diarization is set to true."
Optional Which model to select for the given request. Select the model best suited to your domain to get best results. If a model is not explicitly specified, then we auto-select a model based on the parameters in the RecognitionConfig. .. raw:: html
.. raw:: html :: .. raw:: html .. raw:: html :: .. raw:: html .. raw:: html :: .. raw:: html .. raw:: html :: .. raw:: html .. raw:: html :: .. raw:: html .. raw:: html| Model | Description |
command_and_search | Best for short queries such as voice commands or voice search. |
phone_call | Best for audio that originated from a phone call (typically recorded at an 8khz sampling rate). |
video | Best for audio that originated from from video or includes multiple speakers. Ideally the audio is recorded at a 16khz or greater sampling rate. This is a premium model that costs more than the standard rate. |
default | Best for audio that is not one of the specific audio models. For example, long-form audio. Ideally the audio is high-fidelity, recorded at a 16khz or greater sampling rate. |