Patent ID: 6381569
Filing Date: 2002-04-30
Classification: G10L

Abstract:
A speech recognition system, comprising:a training unit for receiving signals of words or phrases to be trained, generating digitized samples for each said words or phrases, and storing said digitized samples in a speech database; and a speech recognition unit for receiving an input signal to be recognized, the input signal being corrupted by noise, generating a noise compensated template database by applying the effects of said noise to said digitized samples of said speech database upon receiving said input signal, and providing a speech recognition outcome for said input signal based on said noise compensated template database, wherein said speech recognition unit comprises a speech detection unit for receiving said noise corrupted input signal and determining whether speech is present in said input signal, wherein said input signal is designated a noise signal when speech is determined not to be present in said input signal; and a noise unit activated upon determining that speech is not present in said input signal, said noise unit for analyzing said noise signal and synthesizing a synthesized noise signal having characteristics of said noise signal, said synthesized noise signal for applying the effects of noise to said digitized samples of said speech database.