Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent
1993-04-26
1995-07-11
MacDonald, Allen R.
Electrical audio signal processing systems and devices
Hearing aids, electrical
Specified casing or housing
395 2, 395 21, 395 267, 395 271, 381 36, G10L 302
Patent
active
054328837
ABSTRACT:
A voice coding apparatus has a first linear prediction analyzer for acquiring linear prediction coefficients based on a received input speech sampled at a given time interval. A synthesized speech LPC code book stores linear prediction coefficients of a speech resynthesized based on an old input speech. An excitation code book has predetermined excitation vectors. A first error minimizer receives a signal representing an error between the linear prediction coefficient from the first linear prediction analyzer and one linear prediction coefficient of the synthesized speech LPC code book and acquires an index of the synthesized speech LPC code book which minimizes the error. A linear predictor computes a predictive speech based on the index, acquired by the first error minimizer, and an excitation vector of the excitation code book. A second error minimizer receives a signal representing an error between the input speech and the predictive speech from the linear predictor, and acquires the predictive speech that minimizes the error and an index of the excitation code book at that time while scanning indexes of the excitation code book. A second linear prediction analyzer converts the predictive speech from the second error minimizer into a linear prediction coefficient again and supplies the converted linear prediction coefficient to the synthesized speech LPC code book.
REFERENCES:
patent: 5208862 (1993-05-01), Ozawa
Indrayanto et al., "A Neural Network Mapper for Stochastic Code Book Parameter Encoding in Code-Excited Linear Predictive Speech Processing," IEEE/Wescanex 1991, pp. 221-224.
JPOABS Search Abstract: Abstracts of Japan, Okashita Application #: 01-126314, Mar. 4, 1991, vol. 15, #88.
"Improved Speech Quality and Efficient Vector Quantization in Selp", W. B. Kleijin, et al., International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 1988, IEEE, vol. 1, Speech Processing, Catalog No. 88CH2561-9, New York, N.Y., U.S.A., pp. 155-158.
Hafiz Tariq
MacDonald Allen R.
Olympus Optical Co,. Ltd.
LandOfFree
Voice coding apparatus with synthesized speech LPC code book does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Voice coding apparatus with synthesized speech LPC code book, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voice coding apparatus with synthesized speech LPC code book will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-509692