APPARATUS AND METHOD FOR SPEECH RECOGNITION OF DEGRADED SPEECH BY SPEECH CODER

摘要

Disclosed is a speech recognition method and apparatus that includes a process of compensating a degraded speech by a speech coder in order to prevent deterioration of speech recognition performance by the speech coder and improve the speech recognition performance when a voice signal is inputted to the speech recognition apparatus, not directly, but after that the voice signal is reproduced by compressing and decoding processes of the speech coder while transferring the voice signal through a digital communication network after the voice signal is generated. The speech recognition method and apparatus according to the present invention include a process of increasing the speech recognition performance when training the speech recognition apparatus with only an original voice signal not passing through the speech coder or with both the original voice signal and a signal degraded by the plurality of voice compressors, and a process of compensating a degradation by the speech coder regardless of the type of the speech coder.