Information Loss and Anti-Aliasing Filters in Multirate Systems

• Published in: arXiv.org
• Main Authors: Geiger, Bernhard C, Kubin, Gernot
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 07.07.2014
• Subjects: Aliasing; Digital cameras; Filter design (mathematics); Information theory; Normal distribution; Random noise; Upper bounds

This work investigates the information loss in a decimation system, i.e., in a downsampler preceded by an anti-aliasing filter. It is shown that, without a specific signal model in mind, the anti-aliasing filter cannot reduce information loss, while, e.g., for a simple signal-plus-noise model it can...