Represents the query input. It can contain either:
An audio config which instructs the speech recognizer how to process the speech audio.
A conversational query in the form of text.
An event that specifies which intent to trigger.
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{ // Union field |
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Union field input . Required. The input specification. input can be only one of the following: |
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audioConfig |
Instructs the speech recognizer how to process the speech audio. |
text |
The natural language text to be processed. Text length must not exceed 256 character for virtual agent interactions. |
event |
The event to be processed. |
InputAudioConfig
Instructs the speech recognizer how to process the audio content.
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{ "audioEncoding": enum ( |
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audioEncoding |
Required. Audio encoding of the audio content to process. |
sampleRateHertz |
Required. Sample rate (in Hertz) of the audio content sent in the query. Refer to Cloud Speech API documentation for more details. |
languageCode |
Required. The language of the supplied audio. Dialogflow does not do translations. See Language Support for a list of the currently supported language codes. Note that queries in the same session do not necessarily need to specify the same language. |
enableWordInfo |
If |
phraseHints[] |
A list of strings containing words and phrases that the speech recognizer should recognize with higher likelihood. See the Cloud Speech documentation for more details. This field is deprecated. Please use |
speechContexts[] |
Context information to assist speech recognition. See the Cloud Speech documentation for more details. |
model |
Optional. Which Speech model to select for the given request. For more information, see Speech models. |
modelVariant |
Which variant of the |
singleUtterance |
If |
disableNoSpeechRecognizedEvent |
Only used in |
enableAutomaticPunctuation |
Enable automatic punctuation option at the speech backend. |
optOutConformerModelMigration |
If |
AudioEncoding
Audio encoding of the audio content sent in the conversational query request. Refer to the Cloud Speech API documentation for more details.
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AUDIO_ENCODING_UNSPECIFIED |
Not specified. |
AUDIO_ENCODING_LINEAR_16 |
Uncompressed 16-bit signed little-endian samples (Linear PCM). |
AUDIO_ENCODING_FLAC |
FLAC (Free Lossless Audio Codec) is the recommended encoding because it is lossless (therefore recognition is not compromised) and requires only about half the bandwidth of LINEAR16 . FLAC stream encoding supports 16-bit and 24-bit samples, however, not all fields in STREAMINFO are supported. |
AUDIO_ENCODING_MULAW |
8-bit samples that compand 14-bit audio samples using G.711 PCMU/mu-law. |
AUDIO_ENCODING_AMR |
Adaptive Multi-Rate Narrowband codec. sampleRateHertz must be 8000. |
AUDIO_ENCODING_AMR_WB |
Adaptive Multi-Rate Wideband codec. sampleRateHertz must be 16000. |
AUDIO_ENCODING_OGG_OPUS |
Opus encoded audio frames in Ogg container (OggOpus). sampleRateHertz must be 16000. |
AUDIO_ENCODING_SPEEX_WITH_HEADER_BYTE |
Although the use of lossy encodings is not recommended, if a very low bitrate encoding is required, OGG_OPUS is highly preferred over Speex encoding. The Speex encoding supported by Dialogflow API has a header byte in each block, as in MIME type audio/x-speex-with-header-byte . It is a variant of the RTP Speex encoding defined in RFC 5574. The stream is a sequence of blocks, one block per RTP packet. Each block starts with a byte containing the length of the block, in bytes, followed by one or more frames of Speex data, padded to an integral number of bytes (octets) as specified in RFC 5574. In other words, each RTP header is replaced with a single byte containing the block length. Only Speex wideband is supported. sampleRateHertz must be 16000. |
SpeechContext
Hints for the speech recognizer to help with recognition in a specific conversation state.
JSON representation |
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{ "phrases": [ string ], "boost": number } |
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phrases[] |
Optional. A list of strings containing words and phrases that the speech recognizer should recognize with higher likelihood. This list can be used to:
See the Cloud Speech documentation for usage limits. |
boost |
Optional. Boost for this context compared to other contexts:
Dialogflow recommends that you use boosts in the range (0, 20] and that you find a value that fits your use case with binary search. |