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

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.