Method and apparatus for characterizing an input signal

Details Method and apparatus for characterizing an input signal Method and apparatus for characterizing an input signal

1995-01-10

1998-02-03

Downs, Robert W.

395 279, 395 209, G06F 1500

Patent

active

057153728

ABSTRACT:
The present invention provides a method and apparatus for measuring at least one signal characteristic. Initially, a set of features is selected which characterize a signal. An intelligent system, such as a neural network, is trained in the relationship between feature sets and signal characteristics. The selected feature set is then extracted from a first input signal. The extracted feature set from the first signal is input to the trained intelligent system. The intelligent system creates an output signal based on the feature set extracted from the first input signal. This output signal is then used to characterize the input signal. In one embodiment, the invention assesses voice quality, typically as expressed in MOS scores, in a manner which accurately corresponds to the analysis of human evaluators. For voice signals processed by voice coders, the present invention provides a measurement technique which is independent of various voice coding algorithms and consistent for any given algorithm.

REFERENCES:
patent: 4628529 (1986-12-01), Borth et al.
patent: 4827517 (1989-05-01), Atal et al.
patent: 5179624 (1993-01-01), Amano et al.
patent: 5220640 (1993-06-01), Frank
patent: 5263107 (1993-11-01), Ueda et al.
patent: 5274714 (1993-12-01), Hutcheson et al.
Simpson, "Artificial Neural Systems," Pegamon Press, p. 118, Dec. 30, 1990.
Fisz, "Probability Theory and Mathematical Statistics," John Wiley & Sons, pp. 461-467, Dec. 30, 1980.
Wang et al., "Auditory Distortion Measure for Speech Coding," ICASSP '91: Acoustics, Speech & Signal Processing Conference, pp.493-496, Dec. 30, 1991.
Chen et al., "A Robust low-delay Celp Speech Coder at 16 kbits/s," Globecom '89: IEEE Global Telecommunications Conference, pp. 1237-1241, Dec. 30, 1989.
Churchland and Sejnowski, "The Computational Brain," The MIT Press, pp. 107-138, Dec. 30, 1989.

Affiliated with

Also associated with

Rating

Method and apparatus for characterizing an input signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for characterizing an input signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for characterizing an input signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-670173