Speech coding apparatus and method using classification rules

Details Speech coding apparatus and method using classification rules Speech coding apparatus and method using classification rules

1993-09-27

1996-05-28

MacDonald, Allen R.

G10L 506

Patent

active

055220118

ABSTRACT:
A speech coding apparatus and method uses classification rules to code an utterance while consuming fewer computing resources. The value of at least one feature of an utterance is measured during each of a series of successive time intervals to produce a series of feature vector signals representing the feature values. The classification rules comprise at least first and second sets of classification rules. The first set of classification rules map each feature vector signal from a set of all possible feature vector signals to exactly one of at least two disjoint subsets of feature vector signals. The second set of classification rules map each feature vector signal in a subset of feature vector signals to exactly one of at least two different classes of prototype vector signals. Each class contains a plurality of prototype vector signals. According to the classification rules, a first feature vector signal is mapped to a first class of prototype vector signals. The closeness of the feature value of the first feature vector signal is compared to the parameter values of only the prototype vector signals in the first class of prototype vector signals to obtain prototype match scores for the first feature vector signal and each prototype vector signal in the first class. At least the identification value of at least the prototype vector signal having the best prototype match score is output as a coded utterance representation signal of the first feature vector signal.

REFERENCES:
patent: 4715004 (1987-12-01), Kabasawa et al.
patent: 4907276 (1990-03-01), Aldersberg
patent: 4958375 (1990-09-01), Reilly et al.
patent: 4980918 (1990-12-01), Bahl et al.
patent: 5067152 (1991-11-01), Kisor et al.
patent: 5144671 (1992-09-01), Mazor et al.
patent: 5182773 (1993-01-01), Bahl et al.
patent: 5327520 (1994-07-01), Chen
patent: 5345536 (1994-09-01), Hoshimi et al.
Bahl, L. R., et al. "Vector Quantization Procedure For Speech Recognition Systems Using Discrete Parameter Phoneme-Based Markov Word Models." IBM Technical Disclosure Bulletin, vol. 32, No. 7, Dec. 1989, pp. 320-321.
Jelinek, F. "Continuous Speech Recognition by Statistical Methods." Proceedings of the IEEE, vol. 64, No. 4, Apr. 1976, pp. 532-556.
Nadas, A., et al. "An Iterative Flip-Flop Approximation of the Most Informative Split in the Construction of Decision Trees." 1991 International Conference on Acoustics, Speech and Signal Processing, pp. 565-568.

Affiliated with

Also associated with

Rating

Speech coding apparatus and method using classification rules does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speech coding apparatus and method using classification rules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speech coding apparatus and method using classification rules will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-793888