Title :
Filtering of subtractive discrete dither in quantizers: Some new results
Author :
Ghosh, A. ; Pamarti, Sudhakar
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, Los Angeles, CA, USA
Abstract :
Subtractive dither in quantizers is examined as a means to mitigate quantizer non-linearity. The effects of filtering the dither signal to shape its spectral content outside the signal band while maintaining its benefits are studied in detail. Design strategies for finite impulse response (FIR) filters that accomplish spectral shaping as well as allay quantizer non-linearity are derived theoretically. Simulation results for low/medium resolution quantizers are presented to validate the derived conditions on the filter structures.
Keywords :
FIR filters; quantisation (signal); spectral analysis; FIR filters; dither signal filtering; finite impulse response filters; quantizer nonlinearity; spectral content; spectral shaping; subtractive discrete dither; Additives; Finite impulse response filters; Noise; Quantization (signal); Signal resolution; Simulation;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International Conference on
Conference_Location :
Vancouver, BC
DOI :
10.1109/ICASSP.2013.6638774
