Binary scaling: Difference between revisions

Revision as of 19:18, 30 September 2006

Revision as of 02:22, 1 October 2006

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{{uncat|September 2006}}{{wikify-date|September 2006}}

== '''Binary scaling''' ==

Binary scaling is a technique used mainly by embedded [[C_programming_languageC programming language|C]], [[Digital_signal_processingDigital signal processing|DSP]] and [[assembly_languageassembly language|assembler]] programmers to

perform a psuedo floating point using integer arithmetic.

It is faster than floating point and is more accurate, but care must be taken not allow

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To convert back to floating point, we need to divide this by (2^(wordsize-7-1)) == 21.2800000099

Various scalings maybe used. B0 for instance can be used to represent

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Binary scaling is currently used in the linux [[microwindows]] release to linearise [[touchscreen]]s.

It is also used in the [[Discrete_cosine_transformDiscrete cosine transform|DCT]] used to compress [[JPEG]] images in utilities such as the [[GIMP]].

Although floating point has taken over to a large degree, where speed and extra accuracy are required, binary scaling is faster and more accurate.