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Pitch synchronous extended excitation in multimode CELP

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4 Author(s)
Tian, W.S. ; Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore ; Wong, W.C. ; Law, C.Y. ; Tan, A.P.

This letter proposes a 4-kb/s multimode code-excited linear prediction (CELP) coder with pitch synchronous extended excitation. Three modes are used for the short-term excitation, namely algebraic, extended, or stochastic excitations, together with an adaptive codebook for the long-term excitation. Comparisons with the FS-1016 and ITU-T G.723.1 coders show a performance level between these standards.

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Communications Letters, IEEE  (Volume:3 ,  Issue: 9 )