Title :
Unified method for optimization of several video coding algorithms on general-purpose processors
Author :
Lappalainen, Ville ; Hämäläinen, Timo D.
Author_Institution :
Nokia Res. Center, Tampere, Finland
Abstract :
A unified method for optimization of video coding algorithms on general-purpose processors is presented. The method consists of algorithmic, code, compiler, and SIMD (Single Instruction Multiple Data) media Instruction Set Architecture (ISA) optimizations. H.263, H.263+ and emerging H.26L are used as example cases. For the realization of the unified method, the coding elements in all the codecs are analyzed and optimization techniques suitable for one or several of all the coding elements are presented. Results show that a nine-fold improvement can be obtained in H.26L decoding speed in terms of frames per second with video quality equivalent to a non-optimized implementation.
Keywords :
discrete cosine transforms; encoding; interpolation; motion estimation; optimisation; storage management; video coding; H.263; H.26L; H.26L decoding; coding elements; general-purpose processors; instruction set architecture optimizations; optimization; video coding algorithms; Computer architecture; Discrete cosine transforms; Instruction sets; Laboratories; Optimization methods; Optimizing compilers; Streaming media; Video codecs; Video coding; Video compression;
Conference_Titel :
Information Technology: Coding and Computing, 2002. Proceedings. International Conference on
Print_ISBN :
0-7695-1506-1
DOI :
10.1109/ITCC.2002.1000428
