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Link to original content: https://doi.org/10.1093/ietisy/e91-d.10.2532
Switching Search Method for Pulse Assignment in ITU-T G.729D
IEICE Transactions on Information and Systems
Online ISSN : 1745-1361
Print ISSN : 0916-8532
Regular Section
Switching Search Method for Pulse Assignment in ITU-T G.729D
Fu-Kun CHENYu-Ruei TSAI
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JOURNAL FREE ACCESS

2008 Volume E91.D Issue 10 Pages 2532-2535

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Abstract

In this paper, the simplified search designs for the stochastic codebook of algebraic code excited linear prediction (ACELP) for ITU-T G.729D speech coder are proposed. By using two search rounds and limiting the search range, the computational complexity of the proposed approach is only 6.25% of the full search method recommended by G.729D. In addition, the computational complexity of proposed approach is only 59% of the global pulse replacement search method recommended by G.729.1. Simulation results show that the coded speech quality evaluated by using the standard subjective and objective quality measurements is with perceptually negligible degradation.

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© 2008 The Institute of Electronics, Information and Communication Engineers
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