Title :
Visually lossless screen content coding using HEVC base-layer
Author :
Braeckman, Geert ; Satti, Shahid M. ; Heng Chen ; Munteanu, Adrian ; Schelkens, Peter
Author_Institution :
Dept. of Electron. & Inf., Vrije Univ. Brussel, Brussels, Belgium
Abstract :
This paper presents a novel two-layer coding framework targeting visually lossless compression of screen content video. The proposed framework employs the conventional HEVC standard for the base-layer. For the enhancement layer, a hybrid of spatial and temporal block-prediction mechanism is introduced to guarantee a small energy of the error-residual. Spatial prediction is generally chosen for dynamic areas, while temporal predictions yield better prediction for static areas in a video frame. The prediction residual is quantized based on whether a given block is static or dynamic. Run-length coding, Golomb based binarization and context-based arithmetic coding are employed to efficiently code the quantized residual and form the enhancement-layer. Performance evaluations using 4:4:4 screen content sequences show that, for visually lossless video quality, the proposed system significantly saves the bit-rate compared to the two-layer lossless HEVC framework.
Keywords :
arithmetic codes; block codes; quantisation (signal); video coding; Golomb based binarization; HEVC base-layer; HEVC standard; context-based arithmetic coding; enhancement layer; lossless compression; run-length coding; screen content sequences; screen content video; spatial block prediction; temporal block prediction; two-layer coding framework; video frame; visually lossless screen content coding; Abstracts; Collaboration; Decoding; Encoding; Indexes; Propagation losses; Quantization (signal); HEVC; Screen content coding; erosion; near-lossless; scalable video compression;
Conference_Titel :
Visual Communications and Image Processing (VCIP), 2013
Conference_Location :
Kuching
Print_ISBN :
978-1-4799-0288-0
DOI :
10.1109/VCIP.2013.6706364