APPARATUS AND METHOD FOR DIALOGUE SPEECH RECOGNITION USING TOPIC DETECTION

摘要

The present invention relates to a speech recognition apparatus and method, conversational speech recognition apparatus using the subject region detected in accordance with an embodiment of the present invention, with reference to a pre-established global language model database and a pronunciation dictionary database, and the acoustic model database, input before the forward search section for performing a search direction (forward search) for generating a word sequence similar to the detected feature vectors from the speech signal; Subject area detection unit for detecting a subject area (Topic Domain) which is derived from the meaning of the words in the word sequence by using the information about the result of heat generated word of the forward search; And with reference to a particular subject area language model database pre-built with respect to the detected subject region comprises a reverse decoding to perform the reverse decoding (Backward Decoding) for outputting a speech recognition result for the input speech signal into text. ; According to an embodiment of the invention, there is an effect to improve the recognition rate of a conversational sentence (Accuracy) and efficiency (Efficiency). ; Navigation forward, backward decoding, the training corpus, the language model