Bitplane image coding with parallel coefficient processing
Aulí Llinàs, Francesc (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions)
Enfedaque Montes, Pablo (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions)
Moure, Juan C (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
Sánchez, Victor (University of Warwick. Department of Computer Science)

Data:	2016
Resum:	Image coding systems have been traditionally tailored for multiple instruction, multiple data (MIMD) computing. In general, they partition the (transformed) image in codeblocks that can be coded in the cores of MIMD-based processors. Each core executes a sequential flow of instructions to process the coefficients in the codeblock, independently and asynchronously from the others cores. Bitplane coding is a common strategy to code such data. Most of its mechanisms require sequential processing of the coefficients. The last years have seen the upraising of processing accelerators with enhanced computational performance and power efficiency whose architecture is mainly based on the single instruction, multiple data (SIMD) principle. SIMD computing refers to the execution of the same instruction to multiple data in a lockstep synchronous way. Unfortunately, current bitplane coding strategies cannot fully profit from such processors due to inherently sequential coding task. This paper presents bitplane image coding with parallel coefficient (BPC-PaCo) processing, a coding method that can process many coefficients within a codeblock in parallel and synchronously. To this end, the scanning order, the context formation, the probability model, and the arithmetic coder of the coding engine have been re-formulated. The experimental results suggest that the penalization in coding performance of BPC-PaCo with respect to the traditional strategies is almost negligible.
Ajuts:	Ministerio de Economía y Competitividad RYC-2010-05671 Ministerio de Economía y Competitividad TIN2014-53234-C2-1-R Ministerio de Economía y Competitividad TIN2012-38102-C03-03 Ministerio de Economía y Competitividad TIN2011-28689-C02-1 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-691
Nota:	Altres ajuts: EU Marie Curie CIG Programme under Grant PIMCO, and by the UK Engineering and Physical Sciences Research Council.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	JPEG2000 ; Bitplane image coding ; Single Instruction Multiple Data (SIMD)
Publicat a:	IEEE transactions on image processing, Vol. 25, issue 1 (Jan. 2016) , p. 209-219, ISSN 1057-7149

DOI: 10.1109/TIP.2015.2484069

Post-print 11 p, 1.5 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Enginyeries > Group on Interactive Coding of Images (GICI)
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