Title :
Extending SVC by Content-adaptive Spatial Scalability
Author :
Wang, Yongzhe ; Stefanoski, Nikolce ; Lang, Manuel ; Hornung, Alexander ; Smolic, Aljoscha ; Gross, Markus
Author_Institution :
Disney Res. Zurich, Zurich, Switzerland
Abstract :
This paper provides details on a complete integration of Content- adaptive Spatial Scalability (CASS) into the scalable video coding extension of H.264/AVC (SVC). CASS enables the efficient encoding of a high-quality bit stream that contains several versions of an original image sequence. Thereby, each such image sequence has been created by content-adaptive and art directed retargeting to different display aspect-ratios and/or resolutions. Non-linear dependencies between spatial layers, which have been introduced through content-adaptive retargeting, are exploited by a generalization of the three inter-layer prediction tools of SVC, i.e. by content-adaptive inter-layer texture, motion and residual prediction. The CASS extended SVC enables the transmission of video content which has been specifically adapted in an art- directed way to multiple display configurations (e.g. to SD and HD displays with 4:3 and 16:9 aspect-ratios, respectively) using a single compressed bit stream. With our extension, video content of higher semantic quality can be transmitted in a scalable way by introducing an average overhead in bit rate of 9.3%.
Keywords :
data compression; image motion analysis; image sequences; image texture; prediction theory; video coding; CASS; H.264-AVC; SVC; content-adaptive interlayer motion; content-adaptive interlayer texture; content-adaptive retargeting; content-adaptive spatial scalability; display aspect-ratios; high-quality bit stream; image sequence; interlayer prediction tools; nonlinear dependencies; residual prediction; scalable video coding extension; single compressed bit stream; video content transmission; Bit rate; Finite impulse response filter; Image coding; Scalability; Static VAr compensators; Streaming media; Video coding; H.264/AVC; content-adaptation; non-linear image warping; scalable video coding; spatial scalability;
Conference_Titel :
Image Processing (ICIP), 2011 18th IEEE International Conference on
Conference_Location :
Brussels
Print_ISBN :
978-1-4577-1304-0
Electronic_ISBN :
1522-4880
DOI :
10.1109/ICIP.2011.6116466