Title :
An independent evaluation of the performance of the CCITT G.722 wideband coding recommendation using music signals
Author :
Smyth, S.M.F. ; McCanny, J.V. ; Challener, P.
Author_Institution :
Queen´´s Univ., Belfast, UK
Abstract :
The subjective performance of the G.722 7 kHz wideband speech coding recommendation using music signals is described. A number of audible distortions specific to music signals were found to be present in real-time evaluations of the coder. As a result, three modifications are proposed which are found to improve the performance for music signals. These modifications are compatible with the G.722 system configuration. The results obtained clearly demonstrate the very high coding efficiency of subband ADPCM (adaptive differential pulse-code modulation) with comparison to digitally companding and ADM schemes when applied to music signals
Keywords :
audio equipment; electronic music; encoding; signal processing; 7 kHz; ADM; CCITT G.722 recommendation; adaptive differential pulse-code modulation; audible distortions; audio equipment; coder; digitally companding; music signals; subband ADPCM; subjective performance; wideband speech coding; Audio coding; Bandwidth; Bit rate; Multiple signal classification; Phase change materials; Pulse modulation; Signal design; Telecommunications; Telephony; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.197159
