Title :
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
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.543300
