Title :
A 4.8 kbps voice coding using pitch synchronous DFT
Author :
Okazaki, Koji ; Sasama, Akira ; Unagami, Shigeyuki
Author_Institution :
Fujitsu Lab. Ltd., Kawasaki, Japan
Abstract :
The authors propose a 4.8-kbps voice-coding algorithm using pitch-synchronous discrete Fourier transform (DFT). This algorithm combines time-scale compression with pitch-synchronous DFT spectrum coding. It also discards the time-compressed signal-phase information and the nonharmonic spectral components to reduce the amount of information processes. Simulation results show that the reproduced sound quality is good. Processing delay is about 80 ms, without including operation time.<>
Keywords :
data compression; encoding; fast Fourier transforms; speech analysis and processing; voice communication; 4.8 kbit/s; discrete Fourier transform; pitch synchronous DFT; sound quality; spectrum coding; time-scale compression; voice coding; Bandwidth; Data mining; Decoding; Degradation; Delay effects; Laboratories; Mobile communication; Satellites; Signal processing; Signal resolution;
Conference_Titel :
Military Communications Conference, 1988. MILCOM 88, Conference record. 21st Century Military Communications - What's Possible? 1988 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/MILCOM.1988.13368
