Ultra-fast CELP coding using deterministic multi-codebook innovations

The authors describe improvements to the code excited linear prediction (CELP) excitation model for speech coding at 4 kb/s or less. The innovation signal in the coder is modeled using a multisection codebook of deterministic code sequences. These deterministic code sequences not only improve the subjective voice quality of CELP coder at low bit rates, they also significantly reduce the computational complexity of the coder. These advantages make the coder attractive for application in the newly emerging wireless communication environment.<<ETX>>

[1]  Joseph Picone,et al.  Decomposition of the LPC excitation using the zinc basis functions , 1989, IEEE Trans. Acoust. Speech Signal Process..

[2]  Yair Shoham.  Constrained-stochastic excitation coding of speech at 4.8 kb/s , 1990, ICSLP.

[3]  A. Gersho,et al.  Improved excitation for phonetically-segmented VXC speech coding below 4 kb/s , 1990, [Proceedings] GLOBECOM '90: IEEE Global Telecommunications Conference and Exhibition.

[4]  I. A. Gerson,et al.  Techniques for improving the performance of CELP type speech coders , 1991, [Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing.

[5]  Peter Kroon,et al.  Pitch predictors with high temporal resolution , 1990, International Conference on Acoustics, Speech, and Signal Processing.

[6]  Takehiro Moriya,et al.  4.8 kbit/s delayed decision CELP coder using tree coding , 1990, International Conference on Acoustics, Speech, and Signal Processing.

[7]  S. Morissette,et al.  On reducing computational complexity of codebook search in CELP coder through the use of algebraic codes , 1990, International Conference on Acoustics, Speech, and Signal Processing.