초록 ▼

A voice processing and verification system accounts for variations dependent upon telephony equipment differences. Models are developed for the various types of telephony equipment from many users speaking on each of the types of equipment. A transformation algorithm is determined for making a trans

A voice processing and verification system accounts for variations dependent upon telephony equipment differences. Models are developed for the various types of telephony equipment from many users speaking on each of the types of equipment. A transformation algorithm is determined for making a transformation between each of the various types of equipment to each of the others. In other words, a model is formed for carbon button telephony equipment from many users. Similarly, a model is formed for electret telephony equipment from many users, and for cellular telephony equipment from many users. During an enrollment, a user speaks to the system. The system forms and stores a model of the user's speech. The type of telephony equipment used in the original enrollment session is also detected and stored along with the enrollment voice model. The system determines the types of telephony equipment being used based upon the spectrum of sound it receives. The telephony equipment type determination is based upon models formed for each of the telephony equipment types spoken by many different users. Thereafter, when a current user calls in, his/her voice will be compared to the stored model if the same telephony equipment as used in the enrollment is determined. If the user calls in on another type of equipment than that used during the enrollment, the transformation for telephony equipment is applied to the model. The user's voice is then verified against the transformed model. This improves the error rate resulting from different telephony equipment types.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of voice processing to verify a user comprising the steps of:a. receiving an incoming user speech;b. determining the particular type of equipment corresponding to the incoming user speech;c. retrieving an enrollment speech model;d. determining the particular ty

[ What is claimed is:] [1.]1. A method of voice processing to verify a user comprising the steps of:a. receiving an incoming user speech;b. determining the particular type of equipment corresponding to the incoming user speech;c. retrieving an enrollment speech model;d. determining the particular type of equipment corresponding to the enrollment speech model; ande. transforming the enrollment speech model to a corresponding equipment type for the incoming user speech.