Digital dither: decreasing round-off errors in digital signal processing

Author

Csordas, Peter ; Mersich, Andras ; Kollar, Istvan

Author_Institution

Dept. of Meas. & Inf. Syst., Budapest Univ. of Technol. & Econ., Hungary

fYear

2003

fDate

4-6 Sept. 2003

Firstpage

9

Lastpage

14

Abstract

Dithering is a known method for increasing the precision of analog-to-digital conversion. In this paper the basic problems of quantization and the principles of analog dithering are described. The benefits of dithering are demonstrated through practical applications. The possibility and the conditions of using digital dither in practical applications are examined. The aim is to find an optimal digital dither to minimize the round-off error of digital signal processing. The effects on bias and variance using uniform and triangularly distributed digital dithers are investigated and compared. Some DSP implementations are discussed.

Keywords

quantisation (signal); roundoff errors; signal processing; analog-to-digital conversion; bias; digital dither; digital signal processing; quantization; round-off error; variance; Analog-digital conversion; Arithmetic; Digital signal processing; Information systems; Quantization; Roundoff errors; Signal analysis; Signal processing; Signal resolution; Subspace constraints;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Signal Processing, 2003 IEEE International Symposium on

Print_ISBN

0-7803-7864-4

Type

conf

DOI

10.1109/ISP.2003.1275805

Filename

1275805