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Dear All, I have some difficulties in understanding CELP coding process, one of them is about Mean-removed LSF vector and quantization of LSF coefficient (ETSI 06.09). For 7.95 kbps mode, the residual LSF is quantified using split vector quantization (SVQ). The residual LSF is given by: r(n)=z(n)- p(n) where z(n) denote the mean-removed LSF vector at frame n. What is the meaning of mean-removed LSF and how do you calculate it? and then after we split the residual vector, do we have to apply the shannon theorem or do we only need to apply uniform quantization to each splitted residual vector? I hope someone can help me... ;) thanks before regards, arida |
About Mean-removed LSF vector and quantization of LSF coefficient in CELP coding
Started by ●November 12, 2003
