Performance of H.26L Video Encoder on General-Purpose Processor

Authors:
Ville Lappalainen;Antti Hallapuro;Timo D. Hämäläinen
Affiliations:
Nokia Research Center, P.O. Box 100, FIN-33721, Tampere, Finland;Nokia Research Center, P.O. Box 100, FIN-33721, Tampere, Finland;Tampere University of Technology, Institute of Digital and Computer Systems
Venue:
Journal of VLSI Signal Processing Systems
Year:
2003

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Abstract

Two optimized implementations of the emerging ITU-T H.26L video encoder are described. The first, medium-optimized version, is implemented in C and the latter, highly optimized version, utilizes both algorithmic and platform-specific optimizations. Comparisons to a correspondingly optimized H.263/H.263+ implementation are given with the spatial and temporal video quality fixed and the bit rate and complexity varied. On a 733 MHz general-purpose processor, an average encoding speed of 17 frames per second for QCIF sequences is achieved with a 29% reduction in bit rate compared to H.263+. The complexity of H.26L is about 3.4 times more than that of H.263+.