Avoiding oddification to simplify MPEG-1 decoding with LNS

Arnold, Mark G.

doi:10.1109/mmsp.2002.1203264

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Cited by 2 publications

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“…Experiments with and without oddification are discussed in another paper. 4 The details on the processing in my_idct depend on several files that need to be set up prior to invoking the modified mpeg_play. These input files are:…”

Section: Modified Program Structurementioning

confidence: 99%

LNS for low-power MPEG decoding

Arnold

2002

SPIE Proceedings

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Floating-point and fixed-point are expensive for portable multimedia devices. Low-cost Logarithmic Number System (LNS) arithmetic can reduce power consumption of MPEG decoding in exchange for barely perceptible video artifacts. Different number representations need different word sizes to produce the same quality image. LNS can produce good visual results using fewer bits than fixed point. Rounding to the nearest is often done with fixed point and floating point, but LNS allows a cheaper unrestricted-faithful-rounding mode that does not degrade the visual quality of MPEG outputs. This paper also describes how the Berkeley MPEG tools were modified to carry out these MPEG arithmetic experiments.

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Section: Modified Program Structurementioning

confidence: 99%