11/23/2023 0 Comments Ibm watson speech to text narrowbandUnless a different customization weight was specified for the custom model when the model was trained, the default value is:Ġ.1 for next-generation English and Japanese modelsĪ customization weight that you specify overrides a weight that was specified when the custom model was trained. You can use the customization weight to tell the service how much weight to give to words from the custom language model compared to those from the base model for the current request. If you specify a customization ID when you open the connection, For more information, see Using the default model.Īllowable values: For Speech to Text for IBM Cloud Pak for Data, if you do not install the en-US_BroadbandModel, you must either specify a model with the request or specify a new default model for your installation of the service. The default model is en-US_BroadbandModel. See Using a model for speech recognition. The model to use for all speech recognition requests that are sent over the connection. For more information, see Authenticating to IBM Cloud Pak for Data. Pass an access token as you would with the Authorization header of an HTTP request. For more information, see Authenticating to IBM Cloud. You pass an IAM access token instead of passing an API key with the call. Pass an Identity and Access Management (IAM) access token to authenticate with the service. After a connection is established, it can remain active even after the token or its credentials are deleted. You do not need to refresh the access token for an active connection that lasts beyond the token's expiration time. You remain authenticated for as long as you keep the connection open. After you establish a connection, you can keep it alive indefinitely. You pass an access token only to establish an authenticated connection. You must establish the connection before the access token expires. This allows you to specify on either a per-word basis or as a whole, the maximum number of alternatives Watson has for the conversation.Pass a valid access token to establish an authenticated connection with the service. Voice and mail Watson wasn’t sure of max_alternatives Per word confidence allows you to see a per word confidence breakdown, so you can mark unknown words in the final output with question marks or similar to denote if it’s not confident it has transcribed correctly. Watson has support for US and GB variants of speech recognition, wideband, narrowband and adaptive rate bitrates. Luckily it has wide ranging WAV support, something GCP doesn’t, as well as FLAC, G.729, mpg, mp3, webm and ogg. Unfortunately Watson, like GCP, only has support for MULAW (μ-law compounding) and not PCMA as used outside the US. One useful use case is searching through a call recording transcript, and then jumping to that timestamp in the audio.įor example in a long conference call recording you might be interested in when people talked about “Item X”, you can search the call recording for “Item” “X” and find it’s at 1:23:45 and then jump to that point in the call recording audio file, saving yourself an hour and bit of listening to a conference call recording. This reads poorly in CURL but when used with speaker_labels allows you to see the time and correlate it with a recording. Timestamps timestamp each word based on the start of the audio file, This makes the transcription read more like a script with “Speaker 1: Hello other person” “Speaker 2: Hello there Speaker 1”, makes skimming through much easier. Speaker labels enable you to identify each speaker in a multi-party call. “transcript”: “hi Nick this is Nick leaving Nick a test voice mail “ Common Transcription Options speaker_labels=true I’ve got an Asterisk instance that manages Voicemail, so let’s fire the messages to Watson and get it to transcribe the deposited messages: curl -X POST -u "apikey:yourapikey" -header "Content-Type: audio/wav" -data-binary "" “confidence”: 0.831, Once you’ve grabbed your API key we can start transcribing. Select “Speech to Text” and you can view / copy your API key from the Credentials header. The first thing you’re going to need are credentials. Input formats support PCM coded data, so you can pipe PCMA/PCMU (Aka G.711 µ-law 7 a-law) audio straight to it. Sadly, Watson doesn’t have Australian language models out of the box (+1 point to Google which does), but you can add Custom Language Models & train it. IBM’s offering is a bit more flexible than the Google offering, and allows long transcription (>1 minutes) without uploading the files to external storage. The last time I’d played with Speech Recognition on Voice Platforms was in 2012, and it’s amazing to see how far the technology has evolved with the help of AI. I’ve been using IBM’s Watson’s Speech to Text engine for transcribing call audio, some possible use cases are speech driven IVRs, Voicemail to Email transcription, or making Call Recordings text-searchable.
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