Quantization of LSF by Lattice Shape-Gain Vector Quantizer
نویسندگان
چکیده
This paper presents a new lattice vector quantizer, namely lattice based shape-gain vector quantizer (LSGVQ), for line spectral frequencies (LSF) quantization. LSGVQ is developed in an attempt to reduce computation time for codebook search and memory requirement for saving codewords. Optimal design method and optimal encoding algorithm are provided for LSGVQ based on optimization of the squared error distortion. Experiments show that LSGVQ for LSF quantization can achieve spectral distortion less than 1 dB at 20 bits/frame and transparent quality at 26 bits/frame.
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