Low bit-rate spectral coding in CELP, a new LSP-method
Roar Hagen, P. Hedelin · International Conference on Acoustics, Speech, and Signal Processing · 2002
The use of line spectral pair (LSP)-frequencies for approaching the performance of a full vector quantizer for speech coding is discussed. An algorithm is presented that attains close to optimal performance if an accumulative constraint is introduced in the parameter encoding. Numerical results are presented from the training of code-books as well as from the evaluation of the quantizer. Some listening tests are discussed.>