H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/24 (2006.01) G10L 19/06 (2006.01) G10L 19/08 (2006.01) G10L 19/12 (2006.01) H03M 7/00 (2006.01) G10L 19/00 (2006.01) G10L 9/14 (1990.01)
Patent
CA 2135629
A Vector-Sum Excited Linear Predictive Coding (VSELP) speech coder provides improved quality and reduced complexity over a typical speech coder. VSELP uses a codebook which has a predefined structure such that the computations required for the codebook search process can be significantly reduced. This VSELP speech coder uses single or multi-segment vector quantizer of the reflection coefficients based on a Fixed-Point-Lattice-Technique (FLAT). Additionally, this speech coder uses a pre-quantizer to reduce the vector codebook search complexity and a high-resolution scalar quantizer to reduce the amount of memory needed to store the reflection coefficient vector codebooks. Resulting in a high quality speech coder with reduced computations and storage requirements.
Gerson Ira A.
Hartman Matthew A.
Jasiuk Mark A.
Motorola Inc.
Research In Motion Limited
Ridout & Maybee Llp
LandOfFree
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