MPEG-2 video decoding on programmable processors: computational and architectural requirements

Woobin Lee; Yongmin Kim

doi:10.1117/12.227954

25 October 1995 MPEG-2 video decoding on programmable processors: computational and architectural requirements

Woobin Lee, Yongmin Kim

Proceedings Volume 10282, Standards and Common Interfaces for Video Information Systems: A Critical Review; 102820F (1995) https://doi.org/10.1117/12.227954
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

Design of a cost-effective microprocessor architecture for MPEG video decoding requires not only the analysis of MPEG algorithms in terms of the raw number of additions or multiplications, but more importantly, a careful study of mapping those algorithms to the target processor architecture at the instruction level. Even though smart compilers can generate fast and compact codes that rival the hand-optimized code on sequential algorithms, a more accurate evaluation of the processor performance on parallel algorithms such as the core functions in the MPEG-2 decoding is achieved by hand-optimizing the tight loop.

In this paper, we analyze the computational requirements of the key MPEG-2 decoding functions from the instruction level. We use a generic sequential processor model with a RISC-like instruction set to map the tight loop of the key functions to machine instructions. We then extend our processor model to instruction-level parallel (ILP) architectures and present the speed improvement of each key function on two different ILP features and as the degree of parallel processing is increased.

Citation Download Citation

Woobin Lee and Yongmin Kim "MPEG-2 video decoding on programmable processors: computational and architectural requirements", Proc. SPIE 10282, Standards and Common Interfaces for Video Information Systems: A Critical Review, 102820F (25 October 1995); https://doi.org/10.1117/12.227954

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