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Audio coding with signal adaptive filterbanks

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2 Author(s)
Princen, J. ; AT&T Bell Labs., Murray Hill, NJ, USA ; Johnston, J.D.

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

Published in:

Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on  (Volume:5 )

Date of Conference:

9-12 May 1995