Open AccessHigh‐Performance Spatial and Temporal Error‐Concealment Algorithms for Block‐Based Video Coding Techniques
Author(s) -
Hsu ChingTing,
Chen MeiJuan,
Liao WenWei,
Lo ShenYi
Publication year - 2005
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.05.0104.0041
Subject(s) - computer science , encoder , bitstream , error concealment , computer vision , block (permutation group theory) , coding (social sciences) , algorithm , artificial intelligence , computation , enhanced data rates for gsm evolution , data compression , word error rate , decoding methods , bit rate , real time computing , mathematics , statistics , geometry , operating system
A compressed video bitstream is sensitive to errors that may severely degrade the reconstructed images even when the bit error rate is small. One approach to combat the impact of such errors is the use of error concealment at the decoder without increasing the bit rate or changing the encoder. For spatial‐error concealment, we propose a method featuring edge continuity and texture preservation as well as low computation to reconstruct more visually acceptable images. Aiming at temporal error concealment, we propose a two‐step algorithm based on block matching principles in which the assumption of smooth and uniform motion for some adjacent blocks is adopted. As simulation results show, the proposed spatial and temporal methods provide better reconstruction quality for damaged images than other methods.