VOICE SPEAKER AUTHENTICATION SYSTEM

• Main Authors: FUJIMAKI SAKAE, MIZUSHIMA YASUKAZU
• Format: Patent
• Language: English
• Published: 18.05.2006
• Subjects: ACOUSTICS; CALCULATING; COMPUTING; COUNTING; DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; MUSICAL INSTRUMENTS; PHYSICS; PUBLIC ADDRESS SYSTEMS; SPEECH ANALYSIS OR SYNTHESIS; SPEECH OR AUDIO CODING OR DECODING; SPEECH OR VOICE PROCESSING; SPEECH RECOGNITION

PROBLEM TO BE SOLVED: To provide a voice speaker authentication system which prevents "pretence" by synthesized voice using recorded voice or voice synthesis technology, and is hardly affected by ambient noise. SOLUTION: When releasing door lock, an utterer 100 who is an authentication registrant is mounted with a NAM microphone 101, and utters a keyword for authentication in a non-audible murmur note (NAM note) or a usual note. The NAM note or the usual note is picked up by the NAM microphone 101, is amplified by a mic-amplifier 103 and digitized by an A-D converter 104, thereafter, input to a voice authentication part 106. The voice authentication part 106 calculates a degree of similarity between a voice pattern which has been created and registered based on the NAM note or the usual note pre-uttered for registration and has been stored in a registration pattern storage part 107, and the NAM note or the usual note uttered in authentication, and compares the degree of similarity with a preset threshold value to judge whether or not the utterer 100 is authorized to enter or exit from a room. COPYRIGHT: (C)2006,JPO&NCIPI