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International Conference on Computational Science and Its Applications

ICCSA 2006: Computational Science and Its Applications - ICCSA 2006 pp 1003–1008Cite as

High Speed Codebook Searching Algorithm for the CELP Vocoder in the Internet-Based Environment

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Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 3981))

Abstract

In general CELP type vocoders provide good speech quality around 4.8kbps. Among them, G.723.1 developed for Internet Phone and videoconferencing includes two vocoders, 5.3kbps ACELP and 6.3kbps MP-MLQ. Since 6.3kbps MP-MLQ requires large amount of computation for the fixed codebook search, it is difficult to realize real time processing for the internet-based environment. In order to improve the problem this paper proposes the new method that reduces the processing time up to about 30% of codebook search time. We first decide the grid bit, and then search the codebook. Grid bit is selected by comparison between the DC-removed original speech and synthesized speech, which is synthesized with only even or odd pulses of target vector.

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References

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Author information

Authors and Affiliations

  1. Dept. of Information & Telecommunication Eng., Seoul, Korea

    So Yeon Min

  2. Dept. of Software Engr., Seoil College, Seoul, Korea

    Eun Sook Cho

  3. Digital Solution Center, Samsung Electronics Co., Seoul, Korea

    Chul Jin Kim

Authors
  1. So Yeon Min
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  2. Eun Sook Cho
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  3. Chul Jin Kim
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Editor information

Editors and Affiliations

  1. Department of Computer Science, University of Calgary, 2500 University Drive N.W., T2N 1N4, Calgary, AB, Canada

    Marina L. Gavrilova

  2. Department of Mathematics and Computer Science, University of Perugia, via Vanvitelli, 1, I-06123, Perugia, Italy

    Osvaldo Gervasi

  3. William Norris Professor, Head of the Computer Science and Engineering Department, University of Minnesota, USA

    Vipin Kumar

  4. OptimaNumerics Ltd., Cathedral House, 23-31 Waring Street, BT1 2DX, Belfast, UK

    C. J. Kenneth Tan

  5. Clayton School of IT, Monash University, 3800, Clayton, Australia

    David Taniar

  6. Department of Chemistry, University of Perugia, Via Elce di Sotto, 8, I-06123, Perugia, Italy

    Antonio Laganá

  7. School of Computing, Soongsil University, Seoul, Korea

    Youngsong Mun

  8. School of Information and Communication Engineering, Sungkyunkwan University, Korea

    Hyunseung Choo

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© 2006 Springer-Verlag Berlin Heidelberg

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Cite this paper

Min, S.Y., Cho, E.S., Kim, C.J. (2006). High Speed Codebook Searching Algorithm for the CELP Vocoder in the Internet-Based Environment. In: Gavrilova, M.L., et al. Computational Science and Its Applications - ICCSA 2006. ICCSA 2006. Lecture Notes in Computer Science, vol 3981. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11751588_105

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  • DOI: https://doi.org/10.1007/11751588_105

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-34072-0

  • Online ISBN: 978-3-540-34074-4

  • eBook Packages: Computer ScienceComputer Science (R0)

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