@article{ ISI:000248213200001,
Author = {Akyol, Emrah and Tekalp, A. Murat and Civanlar, M. Reha},
Title = {{Content-aware scalability-type selection for rate adaptation of scalable
   video}},
Journal = {{EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING}},
Year = {{2007}},
Abstract = {{Scalable video coders provide different scaling options, such as
   temporal, spatial, and SNR scalabilities, where rate reduction by
   discarding enhancement layers of different scalability-type results in
   different kinds and/or levels of visual distortion depend on the content
   and bitrate. This dependency between scalability type, video content,
   and bitrate is not well investigated in the literature. To this effect,
   we first propose an objective function that quantifies flatness,
   blockiness, blurriness, and temporal jerkiness artifacts caused by rate
   reduction by spatial size, frame rate, and quantization parameter
   scaling. Next, the weights of this objective function are determined for
   different content (shot) types and different bitrates using a training
   procedure with subjective evaluation. Finally, a method is proposed for
   choosing the best scaling type for each temporal segment that results in
   minimum visual distortion according to this objective function given the
   content type of temporal segments. Two subjective tests have been
   performed to validate the proposed procedure for content-aware selection
   of the best scalability type on soccer videos. Soccer videos scaled from
   600 kbps to 100 kbps by the proposed content- aware selection of
   scalability type have been found visually superior to those that are
   scaled using a single scalability option over the whole sequence.}},
DOI = {{10.1155/2007/10236}},
Article-Number = {{10236}},
ISSN = {{1687-6172}},
ResearcherID-Numbers = {{Civanlar, Mehmet/E-4656-2010}},
Unique-ID = {{ISI:000248213200001}},
}

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