Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-07-17
1999-11-16
Bost, Dwayne D.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455424, 455425, 455501, 455 63, 455 671, 455 673, 455 674, 370241, 370249, H04Q 734
Patent
active
059873205
ABSTRACT:
An quality testing apparatus and method for providing an objective and real-time evaluation of voice quality in a wireless communication system. The system under evaluation would include a receiving and transmitting apparatus at both ends of the system. To evaluate voice quality, one apparatus transmits a TDM base band voice test signal to a receiving apparatus. The configuration of the transmitted TDM base band voice test signal permits the receiving end to synchronize a test sentence, contained within the TDM test signal, with a corresponding reference sentence stored at the receiving apparatus. After synchronization, the receiving apparatus uses a model of human hearing to objectively compare the two sentences, and based on the result, outputs an AQS ranking. In addition to voice quality, the apparatus measures SINAD, noise, distortion, and signal level of transmitted test tones and maintains a log of call progress statistics.
REFERENCES:
patent: 4352182 (1982-09-01), Billi et al.
patent: 4726037 (1988-02-01), Jayant
patent: 4852169 (1989-07-01), Veeneman et al.
patent: 4860360 (1989-08-01), Boggs
patent: 5222189 (1993-06-01), Fielder
patent: 5490204 (1996-02-01), Gulledge
patent: 5504832 (1996-04-01), Taguchi
patent: 5621854 (1997-04-01), Hollier
patent: 5784406 (1998-07-01), DeJaco et al.
patent: 5848384 (1998-12-01), Hollier et al.
Article entitled "A Fast Parallel Form IIR Adaptive Filter Algorithm" by Hector Perez and Shigeo Tsujii, (pp. 2118-2122), IEEE Transactions On Signal Processing, vol. 39, No. 9, Sep. 1991.
Article entitled "Speech And Image Signal Compression With Wavelets" by W. Kinser and A. Langi, (pp. 368-375), Department of Electrical & Computer Engineering, University of Manitoba, IEEE, 1993.
Article entitled "Speech Encryption Using Discrete Orthogonal Transforms" by Dr. S. Sridharan et al., (pp. 1647-1650), School of Electrical & Electronic Systems Engineering, Queensland University of Technology, IEEE, 1990.
Article entitled "A Comparison Of Wavelet Deconvolution Techniques For Ultrasonic NDT" by C. H. Chen et al., (pp. 867-870), Electrical & Computer Engineering Dept., Southeastern Massachusetts University, IEEE, 1988.
Article entitled "Signal Design for Infinite Impulse Response Inverse Filters" by W. Wang et al., (pp. 460-464), Communications Sciences Institute, University of Southern California, Los Angeles, IEEE, 1993.
Article entitled "Implementation of Discrete Cosine Conversion Processors" O. V. Mikhaylova et al., (pp. 5-9), Scripta Technica, Inc., 1991.
Article entitled "Critical Band Width in Loudness Summation", by E. Zwicker et al., (pp. 548-557), The Journal Of The Acoustical Society Of America, vol. 29, No. 5, May 1957.
Article entitled "Aural Models for Objective Measures," by Quakenbush et al., Objective Measures of Speech Quality, Geo. Tech., School of Elec. Eng'g (Prentice Hall 1985), Chapter 6, pp. 257-281.
Article entitled "An Adaptive Kalman Equalizer: Structure and Performance" by B. Mulgrew et al., (p. 1727), IEEE Transactions On Acoustics, Speech, and Signal Processing, vol. ASSP-35, No. 12, Dec. 1987.
Bost Dwayne D.
Craver Charles R
LLC, L.C.C.
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