tailieunhanh - Frontiers in Robotics, Automation and Control Part 3

Tham khảo tài liệu 'frontiers in robotics, automation and control part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Automatic Speaker Recognition by Speech Signal 53 took one of two forms a speech spectrogram or a contour voiceprint Baken Orlikoff 2000 . The more commonly used form consists of a representation of a spoken utterance in which time is displayed on the horizontal axis frequency on the vertical axis and spectral energy as the darkness at a given point. At present the increase in commercial application opportunities has resulted in increased interest in speaker recognition research. The main commercial application for speaker recognition seems to be speaker verification used to the physical entry of a person into a secured area or the electronic access to a secured computer file or licensed databases. Such voice-based authorization is often a part of a security system that also includes the use of PIN number password and other more conventional means. The most immediate challenge in voice-based authorization is a caller authentication over the telephone network that will be accurate enough so that financial transactions could take place under it aegis. Car access is yet another popular area where voice-based security systems are gained ground. Some automobile manufactures are testing a speaker identification system to control door locks and ignition switches. An interesting twist to this application is that the ignition switch can be programmed not to work if the driver is under the influence of drugs or alcohol since intoxication is detectable in the speech signal. 7. Acknowledgement This work was supported by the Czech Ministry of Education in the frame of the Research Plan No. MSM 0021630513 Advanced Electronic Communication Systems and Technologies . 8. References Baken R. J. Orlikoff R. F. 2000 . Clinical Measurement of Speech and Voice Singular Publishing Group ISBN 1-56593-869-0 San Diego Kepesi M. Sigmund M. 1998 . Automatic recognition of gender by voice Proceedings of Radioelektronika 98 pp. 200-203 ISBN 80-214-0983-5 Brno April 1998 CERM Brno Lancker D. .

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