Digital precompensation for faulty D/A converters: the "missing pixel" problem

Author

Dey, Sourav R. ; Russell, Andrew I. ; Oppenheim, Alan V.

Author_Institution

Digital Signal Process. Group, MIT, Cambridge, MA, USA

Volume

2

fYear

2004

fDate

17-21 May 2004

Abstract

In some contexts, DACs fail in such a way that specific samples are dropped. For example, in flat-panel video displays, some of the pixel LEDs can malfunction and get permanently set to particular values. We refer to this as the "missing pixel" problem. Under certain conditions, it may be possible to compensate for the dropped samples by preprocessing the digital signal. The paper describes a number of such compensation strategies. Each strategy is analyzed and results from numerical simulations are presented. Of particular interest is the relationship between compensation and the class of discrete prolate spheroidal sequences.

Keywords

compensation; digital-analogue conversion; flat panel displays; iterative methods; minimisation; sequences; signal representation; signal sampling; DAC; digital precompensation; digital signal preprocessing; discrete prolate spheroidal sequences; faulty D/A converters; flat-panel video displays; iterative minimization; missing pixel problem; nonuniform sampling theory; pixel LED; sampled signal representation; Collaboration; Digital signal processing; Displays; Distortion; Instruments; Laboratories; Light emitting diodes; Numerical simulation; Sampling methods; Signal representations;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-8484-9

Type

conf

DOI

10.1109/ICASSP.2004.1326375

Filename

1326375