Title :
An Alternative Scattered Pattern for Flexible Macroblock Ordering in H.264/AVC
Author :
Dhondt, Yves ; Mys, Stefaan ; De Zutter, Saar ; Van de Walle, Rik
Author_Institution :
Ghent Univ., Ghent
Abstract :
Spatial error concealment methods in block-based video codecs use information from surrounding macroblocks to repair lost macroblocks. Using the slice group tool of H.264/AVC, it is possible to encode the macroblocks of a frame based on a scattered pattern, hereby allowing an encoder to actively help concealment methods at the decoder side. In this paper, the requirements for such a pattern are presented. Two commonly used patterns are verified against those requirements and an alternative scattered pattern is presented. Experiments show that our alternative pattern outperforms the old scattered patterns by up to 1.5 dB in case two or more slice groups are lost.
Keywords :
decoding; error analysis; video codecs; video coding; H.264/AVC slice group tool; alternative scattered pattern; flexible macroblock ordering; spatial error concealment method; video codecs; Automatic voltage control; Decoding; Information systems; Multimedia systems; Scattering; Streaming media; Video codecs; Video coding; Video compression; Videoconference;
Conference_Titel :
Image Analysis for Multimedia Interactive Services, 2007. WIAMIS '07. Eighth International Workshop on
Conference_Location :
Santorini
Print_ISBN :
0-7695-2818-X
Electronic_ISBN :
0-7695-2818-X
DOI :
10.1109/WIAMIS.2007.17