JPS6420600A - Voice recognition equipment - Google Patents

Abstract

PURPOSE: To improve the rejection performance when the voices, which are other than recognition objects, are inputted by automatically determining a recognition reject threshold value for every object voice at the time of the registration of recognition object voices and determining as to whether the recognition result is rejected or the recognition result is outputted by comparing the collation result with the corresponding threshold. CONSTITUTION: If a switch 8 selects a registration side, the speech signals inputted from a microphone are A/D converted by a feature extracting section 1 and stored in a standard pattern memory 3. These operations are conducted few times for every recognition word and a re-registration is performed if it is larger than the threshold of the beforehand set distance. Then, a threshold for a rejection is determined by a threshold determining section 4 for every recognition word and stored in a threshold storage section 5. If the switch 8 selects a recognition side, the feature vectors analyzed by the section 1 are stored in an input pattern memory 2, distances are calculated by a collating section 6, transmitted to a recognition discrimination section 7 and a rejection is conducted if the minimum distance exceeds the threshold for the rejection.