Title :
Adaptive predictive coding at variable bit rates
Author :
Dedes, I.S. ; Vaman, D.R. ; Chakravarthy, C.V.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Stevens Inst. of Technol., Hoboken, NJ, USA
Abstract :
An adaptive predictive coder providing toll quality at 16 kbits/s, which can also operate at any intermediate bit rate between 16 and 9.6 kbits/s, with a very graceful degradation of output speech quality has been developed. The coder is best suited for use over packetized networks and can change its bit rate on a packet-by-packet basis, thus providing variable bit rate operation. Performance of the coder under bit errors, lost packets, and tandem codings is discussed
Keywords :
adaptive systems; encoding; packet switching; speech analysis and processing; speech intelligibility; 9.6 to 16 kbit/s; adaptive predictive coder; adaptive predictive coding; any intermediate bit rate; bit errors; graceful degradation; lost packets; packet-by-packet basis; packetized networks; performance; speech quality; tandem codings; toll quality; variable bit rate operation; variable bit rates; Background noise; Bit rate; Degradation; Filters; ISDN; Noise shaping; Predictive coding; Quantization; Speech enhancement; Telecommunication traffic;
Conference_Titel :
Circuits and Systems, 1990., Proceedings of the 33rd Midwest Symposium on
Conference_Location :
Calgary, Alta.
Print_ISBN :
0-7803-0081-5
DOI :
10.1109/MWSCAS.1990.140841
