Hierarchichal language models
A language model and model technology, applied in speech analysis, speech recognition, instruments, etc., can solve problems such as insufficient data language model and inability to accurately process speech.
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[0021] The invention disclosed herein relates to a method of constructing a hierarchy of context models and utilizing these context models to convert speech to text. The method of this embodiment can be used in speech recognition systems and dialogue-based natural language understanding systems. Specifically, the present invention can construct multiple context models from different user language sessions, documents, partial documents, and responses in the form of user utterances. These context models can be organized or grouped into related pairs in a bottom-up fashion using known distance scales. Notably, composing context models into related pairs can be achieved automatically and dynamically at runtime. Related pairs of context models can be combined to form a parent context model. This process can be repeated until a hierarchical tree-like structure of the context model is formed. The hierarchy may have a single root node from which other nodes extend. Note that each ...
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