Low-Complex Adaptive Post Filter for Enhancement of Coded Video

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Andreas Rossholm, Benny Lövström, Kenneth Andersson
Title: Low-Complex Adaptive Post Filter for Enhancement of Coded Video
Conference name: International Symposium on Signal Processing and its Applications (ISSPA07)
Year: 2007
ISBN: 1-4244-0779-6
Publisher: IEEE
City: Sharjah, United Arab Emirates
ISI number: 000259439900280
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
Authors e-mail: benny.lovstrom@bth.se, andreas.rossholm@ericsson.com
Language: English
Abstract: In this paper an adaptive filter that removes de-blocking and de-ringing artifacts and also enhances the sharpness of decoded video, which may be caused by zeroing high-frequency DCT coefficients, is presented. The solution is designed with consideration of Mobile Equipment with limited computational power and memory. Also, the solution is computationally scalable to be able to handle limited computational resources in different user cases. In the paper it is shown that the adaptive filter always keeps or increases the image quality, compared to the original decoded sequences, and that the amount of sharpening decreases with an decrease of bit-rate to limit amplification of coding artifacts or noise.
Subject: Signal Processing\Filter Design
Keywords: adaptive filter, video, blocking, ringing, enhancement, sharpening, DCT, mobile equipment, low-complex