DocumentCode
2901460
Title
Audio coding with signal adaptive filterbanks
Author
Princen, J. ; Johnston, J.D.
Author_Institution
AT&T Bell Labs., Murray Hill, NJ, USA
Volume
5
fYear
1995
fDate
9-12 May 1995
Firstpage
3071
Abstract
In this paper we present a high quality audio coding system based on a novel nonuniform modulated filterbank coupled with time-varying cosine modulated filterbanks in a cascade architecture. The system makes use of psychoacoustic thresholds in a natural way to adapt the resolution of the filterbank to achieve high coding gain on a wide range of signal types. Results show that the system provides excellent quality at 64 kb/s and good quality at 48 kb/s for monophonic coding
Keywords
adaptive filters; adaptive signal processing; audio coding; band-pass filters; quantisation (signal); cascade architecture; high coding gain; high quality audio coding system; monophonic coding; nonuniform modulated filterbank; psychoacoustic thresholds; resolution; signal adaptive filterbanks; time-varying cosine modulated filterbanks; Adaptive filters; Audio coding; Filter bank; Frequency; Modulation coding; Noise level; Psychoacoustic models; Psychology; Quantization; Signal resolution;
fLanguage
English
Publisher
ieee
Conference_Titel
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location
Detroit, MI
ISSN
1520-6149
Print_ISBN
0-7803-2431-5
Type
conf
DOI
10.1109/ICASSP.1995.479494
Filename
479494
Link To Document