Title :
Frequency selective harmonic coding at 2400 bps
Author :
Hassanein, Hisham ; Brind´Amour, A. ; Déry, Sylvain ; Bryden, Karen
Author_Institution :
Communication Res. Centre, Ottawa, Ont., Canada
Abstract :
This paper describes a technique that reduces the number of parameters transmitted in Harmonic Coders. The technique is called Frequency Selective Harmonic Coding (FSHC), and exploits an auditory perception model to extract only a portion of the speech spectrum for quantization. The algorithm has been fully implemented in real-time hardware at the transmission rate of 2400 bps with an improved quality over existing 2400 bps vocoders
Keywords :
signal sampling; speech codecs; speech coding; speech processing; vector quantisation; vocoders; 2400 bit/s; algorithm; analog speech sampling; auditory perception model; dynamic frequency band extraction; frequency selective harmonic coding; high quality speech; real-time hardware; speech spectrum; transmission rate; transmitted parameter reduction; vector quantization; vocoders; Bit rate; Communication system security; Frequency; Hardware; Interpolation; Land mobile radio; Linear predictive coding; Quantization; Speech coding; Speech synthesis; Vocoders;
Conference_Titel :
Circuits and Systems, 1994., Proceedings of the 37th Midwest Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-2428-5
DOI :
10.1109/MWSCAS.1994.519077
