Patent ID: 7177806

Claim:
A sound signal recognition system, comprising: a sound signal input part receiving a sound signal including one of either a voice signal or a DTMF signal, or both; a sound signal analyzing part calculating a feature value by conducting an acoustic process for each segment of a sound signal; a matching part including a voice signal model and a DTMF signal model, matching the feature value, calculated by the sound signal analyzing part, with both the voice signal model and the DTMF signal model, and producing a matching result; a sound signal recognizing part, including a language model, recognizing the sound signal by using the matching result of the matching part and the language model, and selecting a better result by comparing the matching result using the voice signal model with the matching result using the DTMF signal model in the matching part for each segment of a sound signal, wherein a sound signal recognition process is conducted with respect to the sound signal including either the voice signal or the DTMF signal, or both; and an integrating part connecting sound signal recognition results selected by the sound signal recognizing part and integrating them as a total sound signal recognition result with respect to all the sections of the input sound signal.