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Low rate audio coder with hierarchical filterbanks and lattice vector quantization

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2 Author(s)
Monta, P. ; Res. Lab. of Electron., MIT, Cambridge, MA, USA ; Shiufun Cheung

We describe a perceptual audio coder that employs nonuniform hierarchical filterbanks and entropy-coded lattice vector quantization. The nonuniform filterbanks present a good match to critical-band sampling, and they avoid the complications of block-size adjustment during signal transients. An entropy-coded lattice vector quantizer provides efficient quantization and coding of the filterbank samples. The coder achieves “transparent” quality at a rate of 96 kb/s, and efficient algorithms exist for the filterbank and vector quantizer subsystems

Published in:

Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on  (Volume:ii )

Date of Conference:

19-22 Apr 1994