Title :
Pitch synchronous 1st-order linear d.p.c.m. system
Author :
Xydeas, C.S. ; Steele, R.
Author_Institution :
Loughborough University of Technology, Department of Electronic & Electrical Engineering, Loughborough, UK
Abstract :
A system called p.s.f.o.l.d. is described which exploits the correlation between successive pitch periods of a speech signal. This system is a differential one and can employ various types of encoders. We describe a p.s.f.o.l.d. system using a 1st-order d.p.c.m. encoder and show that for a speech utterance this system has a peak signal/noise ratio which is 6 dB larger, and has an increase in dynamic range of 13 dB, compared with a 1st-order d.p.c.m. codec.
Keywords :
delta modulation; encoding; pulse-code modulation; voice communication; PSFOLD; encoders; pitch synchronous 1st order linear DPCM system; signal/noise ratio; speech signal;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19760073
