Title :
LSF quantization with multiple scale lattice VQ for transmission over noisy chanels
Author :
Vasilache, Adriana ; Tabus, Ioan
Author_Institution :
Inst. of Signal Process., Tampere Univ. of Technol., Tampere, Finland
Abstract :
In this paper we discuss the performance of several enumeration techniques for lattice quantizers when the transmission channel is noisy. We consider the multiple scale leader lattice quantization structure and we test three variants of lattice vectors indexing for LSF parameters quantization. We com pare the results obtained with the proposed methods and also compare with the results obtained with the codec G.729 in the presence of noise.
Keywords :
linear predictive coding; speech coding; vector quantisation; vectors; wireless channels; LSF parameters quantization; MSLLVQ; lattice enumeration; lattice vectors indexing; multiple scale lattice VQ; noisy channels; scale leader lattice quantization structure; transmission channel; Abstracts; Bit error rate; Indexes; Lattices; Lead; Quantization (signal);
Conference_Titel :
Signal Processing Conference, 2002 11th European
Conference_Location :
Toulouse
