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IEICE TRANSACTIONS on Fundamentals

Performance Comparison of Single and Multi-Stage Algebraic Codebooks

Sung-Kyo JUNG, Hong-Goo KANG, Dae-Hee YOUN

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Summary :

This letter presents the advantages of a cascaded algebraic codebook structure at relatively high bit-rates. The cascaded structure that consists of two stages provides flexible pulse combinations due to an additional gain term in the second stage. The perceptual quality of the cascaded structure can be further improved by using a gain re-estimation scheme. Experiments confirm that the cascaded structure has a big advantage in terms of quality and complexity as the bit-rate becomes higher.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E86-A No.12 pp.3288-3290
Publication Date
2003/12/01
Publicized
Online ISSN
DOI
Type of Manuscript
LETTER
Category
Speech and Hearing

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