Minimising the effects of subband quantisation of the time domain aliasing cancellation filter bank

Author

Jakob, Conrad ; Bradley, Alan

Author_Institution

Dept. of Commun. & Electr. Eng., R. Melbourne Inst. of Technol., Vic., Australia

Volume

2

fYear

1996

fDate

7-10 May 1996

Firstpage

1033

Abstract

The effect of the quantisation of filter bank subbands has been analysed by incorporating quantisation noise models into the time domain aliasing cancellation (TDAC) filter bank. We have found expressions for the reconstruction error of the quantised TDAC system in terms of several signal correlated components, and an uncorrelated component. These expressions allow easy identification of subjectively annoying errors, and provide the framework for a subjective optimisation of the quantisation process. Research has been carried out on alternative quantiser models and methods of quantiser-compensation

Keywords

acoustic signal processing; audio coding; band-pass filters; correlation methods; filtering theory; noise; optimisation; quantisation (signal); signal reconstruction; signal synthesis; time-domain analysis; audio coding; filter bank subbands; quantisation noise models; quantised TDAC system; quantiser compensation methods; quantiser models; reconstruction error; signal correlated components; subband quantisation; subjective optimisation; subjectively annoying errors; time domain aliasing cancellation filter bank; uncorrelated component; waveform coder; Australia; Bandwidth; Degradation; Digital filters; Filter bank; Noise cancellation; Quantization; Signal analysis; Signal synthesis; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on

Conference_Location

Atlanta, GA

ISSN

1520-6149

Print_ISBN

0-7803-3192-3

Type

conf

DOI

10.1109/ICASSP.1996.543300

Filename

543300