A Basic Study on Edge Adaptive Deblocking Filter

Shohei MATSUO  Seishi TAKAMURA  Yoshiyuki YASHIMA 

Publication
D - Abstracts of IEICE TRANSACTIONS on Information and Systems (Japanese Edition)  Vol.J92-D  No.10  pp.1710-1712
Publication Date: 2009/10/01
Online ISSN: 1881-0225
Print ISSN: 1880-4535
Type of Manuscript: Special Section LETTER (Special Section on Picture Coding and Image Media)
Category: 
Keyword: 
H.264/AVC,  deblocking filter, 

Full Text(in Japanese): PDF(189.9KB)

Summary: 
DF (Deblocking Filter) is newly introduced into H.264/AVC to remove the blocky artifacts. It improves the picture quality and the improved picture is set to the frame buffer for motion compensation. As a result, higher coding efficiency is achieved by the DF. However, if the original image has strong slant patterns, the DF could remove the edges to be kept because it is applied only perpendicularly to the block boundaries. In this paper, we propose EADF (Edge Adaptive Deblocking Filter) which is applied not only for the vertical but also for other directions to deal with this problem. Simulation results showed us that EADF was especially effective for the sequence "Foreman" with PSNR gain of 0.04 dB.