Title :
CELP based mixed-source model for very low bit rate speech coding
Author :
Kwon, C.H. ; Un, C.K.
Author_Institution :
Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
A CELP based mixed-source model is described. It uses a mixed excitation which combines a lowpass-filtered adaptive source and a highpass-filtered stochastic source. In addition, one more stochastic source is newly employed for more natural sounding speech. In informal listening tests, the proposed model at 3 kbit/s shows very good performance both in speech quality and intelligibility.
Keywords :
adaptive filters; high-pass filters; linear predictive coding; low-pass filters; speech coding; speech intelligibility; 3 kbit/s; CELP based mixed-source model; highpass-filtered stochastic source; listening tests; lowpass-filtered adaptive source; mixed excitation; speech intelligibility; speech quality; stochastic source; very low bit rate speech coding;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930105
