On improving vector excitation coders through the use of spherical lattice codebooks (SLCs)

Two novel techniques for use in VXC (vector excitation coding) speech coders are presented. The first enables massive excitation codebooks (>or=20 b) to be used at realizable complexities by using a novel spherical lattice codebook for the excitation codebook. The second technique is a generaliza...

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Bibliographic Details
Main Authors: Ireton, M.A., Xydeas, C.S.
Format: Conference Proceeding
Language:English
Subjects:
Bit rate
Gain measurement
Lattices
Linear approximation
Performance analysis
Speech analysis
Speech coding
Speech synthesis
Stress
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Summary:Two novel techniques for use in VXC (vector excitation coding) speech coders are presented. The first enables massive excitation codebooks (>or=20 b) to be used at realizable complexities by using a novel spherical lattice codebook for the excitation codebook. The second technique is a generalization of the gain-optimized error measure which allows any number of gains to be calculated for each excitation vector. This multiple-gain VXC can be thought of as a hybrid between multipulse and VXC.< >
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.1989.266362