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Efficient Techniques for Determining and Encoding the Long Term Predictor Lags for Analysis-by-Synthesis Speech Coders

  • Ira A. Gerson
  • Mark A. Jasiuk
Part of the The Springer International Series in Engineering and Computer Science book series (SECS, volume 224)

Abstract

Many analysis-by-synthesis speech coders, such as CELP coders, make use of a combination of long-term and short-term predictors. The use of long term predictors (adaptive codebooks) incorporating lags with sub-sample resolution has contributed to enhanced performance for these coders, particularly for high pitched speakers [1], [2]. This paper discusses an efficient technique for determining the lag for the long-term predictor (index of the adaptive codebook) when sub-sample resolution lags are allowed. Also, an efficient technique for encoding these lags (adaptive codebook indices) is presented.

Keywords

Efficient Technique Speech Coder Speech Database Speech Frame Loop Search 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    P. Kroon and B.S. Atal, “Pitch Predictors with High Temporal Resolution,” Proc. IEEE Int. Conf. on Acoustics, Speech and Signal Processing, pp. 661–664, April 1990.Google Scholar
  2. [2]
    J.S. Marques, I.M. Trancoso, J.M. Tribolet, and L.B. Almeida, “Improved Pitch Prediction with Fractional Delays in CELP Coding,” Proc. IEEE Int. Conf. on Acoustics, Speech and Signal Processing, pp. 665–668, April 1990.Google Scholar
  3. [3]
    J-H Chen, R. Danisewicz, R. Kline, D. Ng, R. Valenzuela, and B. Villella, “A Real-Time Full Duplex 16/8 KBPS CVSELP Coder with Integral Echo Canceller Implemented on a Single DSP56001,” Advances in Speech Coding, pp. 299–308, Kluwer Academic Publishers, 1991.Google Scholar
  4. [4]
    M. Yong and A. Gersho, “Efficient Encoding of the Long-Term Predictor in Vector Excitation Coders,” Advances in Speech Coding, pp. 329–338, Kluwer Academic Publishers, 1991.Google Scholar
  5. [5]
    J. Campbell, V. Welch, and T. Tremain, “An Expandable Error-Protected 4800 bps CELP Coder,” Proc. IEEE Int. Conf. on Acoustics, Speech and Signal Processing, pp. 735–738, May 1989.Google Scholar
  6. [6]
    I.A. Gerson and M.A. Jasiuk, “Vector Sum Excited Linear Prediction (VSELP) Speech Coding at 8 kbps,” Proc. IEEE Int. Conf. on Acoustics, Speech and Signal Processing, pp. 461–464, April 1990.Google Scholar
  7. [7]
    I.A. Gerson and M.A. Jasiuk, “Techniques for Improving the Performance of CELP Type Speech Coders,” Proc. IEEE Int. Conf. on Acoustics, Speech and Signal Processing, pp. 205–208, April 1991.Google Scholar

Copyright information

© Springer Science+Business Media New York 1993

Authors and Affiliations

  • Ira A. Gerson
    • 1
  • Mark A. Jasiuk
    • 1
  1. 1.Corporate Systems Research LaboratoriesMotorolaSchaumburgUSA

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