Open AccessError Concealment Using Intra‐Mode Information Included in H.264/AVC‐Coded Bitstream
Author(s) -
Kim Donghyung,
Jeong Seyoon,
Choi Jin Soo,
Jeon Gwanggil,
Kim Seungjong,
Jeong Jechang
Publication year - 2008
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.08.0108.0196
Subject(s) - bitstream , computer science , scalable video coding , enhanced data rates for gsm evolution , interpolation (computer graphics) , coding (social sciences) , pixel , block (permutation group theory) , computer vision , context adaptive variable length coding , artificial intelligence , algorithm , context adaptive binary arithmetic coding , motion compensation , data compression , decoding methods , mathematics , image (mathematics) , statistics , geometry
The H.264/AVC standard has adopted new coding tools such as intra‐prediction, variable block size, motion estimation with quarter‐pixel‐accuracy, loop filter, and so on. The adoption of these tools enables an H.264/AVC‐coded bitstream to have more information than was possible with previous standards. In this paper, we propose an effective spatial error concealment method with low complexity in H.264/AVC intra‐frame. From information included in an H.264/AVC‐coded bitstream, we use prediction modes of intra‐blocks to recover a damaged block. This is because the prediction direction in each prediction mode is highly correlated to the edge direction. We first estimate the edge direction of a damaged block using the prediction modes of the intra‐blocks adjacent to a damaged block and classify the area inside the damaged block into edge and flat areas. Our method then recovers pixel values in the edge area using edge‐directed interpolation, and recovers pixel values in the flat area using weighted interpolation. Simulation results show that the proposed method yields better video quality than conventional approaches.