A speech recognition system for cognitive impairment. The system comprises: an acoustic feature extractor, an acoustic model, a language model, a pronunciation dictionary, and a decoder. The acoustic model has a communication connection with the acoustic feature extractor and the decoder, and the language model and the pronunciation dictionary each have a communication connection with the acoustic model, wherein the acoustic feature extractor is used to extract relevant speech features and send same to the acoustic model; the acoustic model is used to extract speech features that distinguish between phonemes and domains by means of training on the basis of the speech features; and the decoder obtains recognized text in a search space composed on the basis of the speech features that distinguish between phonemes and domains, acoustic context, the pronunciation dictionary and a knowledge source of the language model. The system may improve the accuracy of speech recognition for the cognitively impaired.
SPEECH RECOGNITION SYSTEM FOR COGNITIVE IMPAIRMENT