When deployed, the ASR engine can optionally condition the transcript output on n-gram language models.
These models are simple 3- and 4-gram language models trained with Kneser-Ney smoothing using KenLM.
Primary use case intended for these models is automatic speech recognition.
There are a variety of formats contained within this model archive:
ARPA-formatted Language Models:
KenLM-formatted Binary Language Models
Rescoring Language Models
FST-formatted Language Models
ARPA and KenLM binary formatted files can be used directly by the CTC CPU Decoder.
The GPU decoder uses a FST-formatted language model (derived from the pruned n-gram
model) and then optionally uses the
carpa-formatted LMs for rescoring.
Sequence of zero or more words.
Likelihood of word sequence.
The mixed language model provided here is English-only and is trained on a mix of transcriptions from LibriSpeech, Switchboard and Fisher datasets.
Currently, the models distributed with this model resource cannot be trained using the TAO Toolkit. To train custom LMs for ASR inference using the TAO Toolkit please refer to the TAO Toolkit Documentation.
By downloading and using the models and resources packaged with TAO Toolkit Conversational AI, you would be accepting the terms of the Jarvis license.
NVIDIA’s platforms and application frameworks enable developers to build a wide array of AI applications. Consider potential algorithmic bias when choosing or creating the models being deployed. Work with the model’s developer to ensure that it meets the requirements for the relevant industry and use case; that the necessary instruction and documentation are provided to understand error rates, confidence intervals, and results; and that the model is being used under the conditions and in the manner intended.