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To effectively estimate the linear spectrum frequency (LSF) by intra- and inter- frame dependence of LSFs, an intraframe conditional vector quantization (CVQ) combined with interframe interpolation (CVQ-I) is proposed to estimate the lost LSFs. We firstly partition the dependent 10-dimension LSFs in a frame into two bundles: the first 4-dimension vectors called low part LSFs (LPL, hereafter LPL also...
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