Bitplane image coding with parallel coefficient processing

Francesc Aulí-Llinàs, Pablo Enfedaque, Juan C. Moure, Victor Sanchez

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Abstract

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.

Original languageAmerican English
Article number7283609
Pages (from-to)209-219
Number of pages11
JournalIEEE Transactions on Image Processing
Volume25
Issue number1
DOIs
Publication statusPublished - Jan 2016

Keywords

  • Bitplane image coding
  • JPEG2000
  • Single instruction multiple data (SIMD)

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