Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1991-01-28
1993-03-16
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 29, G10L 500
Patent
active
051951371
ABSTRACT:
In many applications involving the coding and processing of speech signals the relevant applicable codebook is one which may be termed a sparse codebook. That is, the majority of elements in the codebook are zero valued. The searching of such a sparse codebook is accelerated in accord with the present invention by generating auxiliary information defining the sparse nature of the codebok and using this information to assist and speed up searches of the codebook.
In a particular method of searching the calculation of the distance between a target vector and a stored codebook vector is enhanced by use of a distortion metric derived from energy terms and correlation terms of the codebook entries. Calculation of these energy and correlation terms is speeded up by exploiting the sparseness of the codebook entries. The non-zero elements (NZE) of the space codebook are each identified and are defined by their offset from a reference point.
REFERENCES:
patent: 4797925 (1989-01-01), Lin
patent: 4817157 (1989-03-01), Gerson
patent: 4963030 (1990-10-01), Makur
patent: 5038377 (1991-08-01), Kihara et al.
G. Davidson and Allen Gersho, "Complexity Reduction Methods for Vector Excitation Coding," IEEE ICASSP 86, Tokyo (1986), pp. 3055-3058.
W. B. Kleijn, D. J. Krasinski and R. H. Ketchum, "Improved Speech Quality and Efficient Vector Quantization in SELP," IEEE (1988), pp. 155-158.
AT&T Bell Laboratories
Kemeny Emanuel S.
Melnick S. A.
Steinmetz A. G.
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