Title :
Modelling LPC-residue by components for good quality speech coding
Author_Institution :
ELAB Norwegian Inst. of Technol., Trondheim, Norway
Abstract :
A hybrid speech coding scheme is proposed based on the properties of the linear predictive coding (LPC)-residual. It is shown that the residual comprises characteristically different components, namely, high-energy pulses, a low-energy smooth component, and a random component. It is proposed that residue coding, as a composite of the respective functions corresponding to the components, is more effective and economical than the existing coding techniques which use only a single function to represent the entire residue. Results of simulating a hybrid coder with full quantization and also subjective evaluation of its performance are reported
Keywords :
encoding; speech analysis and processing; LPC-residue; high-energy pulses; hybrid speech coding; linear predictive coding; low-energy smooth component; performance evaluation; quantisation; random component; residue coding; subjective evaluation; Delay; Filtering; Filters; Frequency; Pulse shaping methods; Quantization; Shape; Speech coding; Speech synthesis; Stochastic processes;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.196540
