Title :
Characterizing the subjective performance of the ITU-T 8 kb/s speech coding algorithm-ITU-T G.729
Author :
Perkins, Mark E. ; Evans, Keith ; Pascal, Dominique ; Thorpe, Leigh A.
Author_Institution :
AT&T, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
Three listening-only experiments were conducted to characterize the subjective performance (i.e., speech quality) of 8 kb/s G.729. These experiments evaluated the quality of coded speech under a variety of conditions: (i) interworking with other international and regional speech coding standards; (ii) input speech that had been corrupted by environmental noise; (iii) operation over degraded transmission channels (including random bit errors and a simulated radio channel). The results of these experiments indicate that 8 kb/s G.729 meets the performance requirements that were established at the beginning of the standardization process
Keywords :
code standards; coding errors; noise pollution; speech codecs; speech coding; speech intelligibility; telecommunication channels; telecommunication standards; 8 kbit/s; ITU-T G.729; coded speech quality; coding standards interworking; degraded transmission channels; environmental noise; input speech; international speech coding standards; listening only experiments; random bit errors; regional speech coding standards; simulated radio channel; speech coding algorithm; speech quality; standardization; subjective performance; Background noise; Circuit testing; Code standards; Degradation; Laboratories; Speech codecs; Speech coding; Telecommunications; Wireless communication; Working environment noise;
Journal_Title :
Communications Magazine, IEEE
