Title :
Pitch synchronous extended excitation in multimode CELP
Author :
Tian, W.S. ; Wong, W.C. ; Law, C.Y. ; Tan, A.P.
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
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.
Keywords :
adaptive codes; linear predictive coding; speech coding; 4 kbit/s; CELP coder; FS-1016 coder; ITU-T G.723.1 coder; adaptive codebook; algebraic excitation; long-term excitation; multimode code-excited linear prediction; pitch synchronous extended excitation; short-term excitation; speech coding; stochastic excitation; Bit rate; Code standards; Filtering theory; Laboratories; Linear predictive coding; Nonlinear filters; Signal synthesis; Speech; Stochastic processes; Vectors;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.784585
