The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 2001
Filed:
Dec. 16, 1998
Remco Teunen, Menlo Park, CA (US);
Ben Shahshahani, Capitola, CA (US);
Nuance Communications, Menlo Park, CA (US);
Abstract
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.