Title :
A robust LSP encoding scheme for noisy channel
Author :
Du, Junchen ; Kim, Seung P.
Author_Institution :
Dept. of Electr. Eng., Polytech. Univ., Brooklyn, NY, USA
Abstract :
A new speech LSP parameters coding scheme for noisy channels is proposed. In this scheme, 5 out of the 10 LSPs are scalar quantized. Non-linear prediction is used for coding the other 5 LSPs and the prediction errors are vector quantized. The 5 LSPs are chosen in the structure so that the channel error will not affect more than two frame LSPs. This new scheme can support various levels of channel coding. In noiseless channels it needs 27 bits/frame at 1 dB average spectral distortion with a frame size 30 ms. With additional 4 bits/frame to protect a part of the 27 bits, a (15,11) Hamming code achieves 1 dB average distortion at the error rate 0.1%
Keywords :
Hamming codes; channel coding; linear predictive coding; speech coding; telecommunication channels; vector quantisation; LSP parameters; channel coding; line spectrum pairs; noiseless channel; noisy channel; nonlinear prediction; prediction errors; robust LSP encoding scheme; scalar quantization; spectral distortion; speech coding; vector quantization; Channel coding; Error analysis; Linear predictive coding; Nonlinear distortion; Protection; Quantization; Robustness; Speech analysis; Speech coding; Working environment noise;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.543229
