Title :
Low delay coding of wideband audio (20 Hz-15 kHz) at 64 kbps
Author :
Jbira, A. ; Moreau, N. ; Dymarski, P.
Author_Institution :
ENST, Paris, France
Abstract :
A 64 kbps coder of wideband (15 kHz) monophonic audio signals is described. Its structure is based on the transform coded excitation scheme, adopted to 7 kHz band signals. Significant modifications are proposed, that yield reduction of delay while keeping an almost transparent quality of speech and music, equivalent to that provided by the MPEG-1, layer II audio standard at the same bit rate. Algorithmic delay has been reduced to 17 ms-approximately 1/3 the delay of the MPEG coder
Keywords :
audio coding; audio signals; delays; transform coding; 15 kHz; 17 ms; 20 Hz to 15 kHz; 64 kbit/s; 7 kHz; MPEG coder; MPEG-1 layer II audio standard; algorithmic delay; bit rate; low delay coding; music; speech quality; transform coded excitation; wideband monophonic audio signals; Bit rate; Delay; Filters; Multiple signal classification; Psychoacoustic models; Quantization; Signal analysis; Speech; Time frequency analysis; Wideband;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.679673
