Title :
Optimum design of subband coder for a first order autoregressive process
Author :
Ashourian, Mohsen ; Salleh, Sheikh Hussain S
Author_Institution :
Fac. of Eng., Azad Univ., Esfahan, Iran
Abstract :
This paper provides a method for analysis and design of a subband coder involving the quantization effect. A joint optimization method for the design of filter banks and related dithered quantizers by using a time-domain formulation is proposed. To show the effectiveness of design method, the optimum filters are calculated for a first order autoregressive process in a paraunitary filter bank and results are compared with a non-modified subband coder. Experiments show that by appropriate choice of synthesis filter bank, it would be possible to replace signal-dependent artifacts with signal-independent white noise and also reduce the mean square error of reconstruction signal.
Keywords :
autoregressive processes; channel bank filters; circuit optimisation; data compression; digital filters; encoding; mean square error methods; network synthesis; quantisation (signal); signal reconstruction; time-domain synthesis; filter banks design; first order autoregressive process; joint optimization method; mean square error reduction; nonmodified subband coder; optimum design; paraunitary filter bank; quantization effect; reconstruction signal; signal-dependent artifacts; signal-independent white noise; subband coder; synthesis filter bank; time-domain formulation; Additive noise; Design methodology; Encoding; Filter bank; Mathematical model; Optimization methods; Quantization; Signal analysis; Signal synthesis; Time domain analysis;
Conference_Titel :
TENCON '02. Proceedings. 2002 IEEE Region 10 Conference on Computers, Communications, Control and Power Engineering
Print_ISBN :
0-7803-7490-8
DOI :
10.1109/TENCON.2002.1180259
