Salami, R A, Hanzo, L and Appleby, D
A Computationally Efficient CELP Codec with Stochastic Vectorquantisation of LPC Parameters.
In, URSI'89, Erlangen, W-, Germany,
In this contribution, computationally efficient CELP structures are proposed for low-complexity speech coding below 6.4Kbits/s. We also report on a new approach for low bit rate speech coding using binary excitation pulses, which delivers the quality of the CELP codec without the excitation codebook storage, and with a very simple excitation determination procedure. Furthermore, we propose a switched-adaptive stochastic vector quantisation scheme for quantising the line spectrum frequencies using 22 bits without any perceivable spectral distortion.
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