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Talk:Transform coding

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This is an old revision of this page, as edited by 206.79.158.100 (talk) at 22:49, 14 September 2007 (headings + number of pixels per line?). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

compression?

Hi folks,

Transform-coding is not a type of compression, but used by compression. Nearly all transformations used by compression-methods are reversible. The lossy compression is a result of the quantisation-process which follows the transformation. Maybe someone could point that out. -- ThePacker 01:10, 4 February 2006 (UTC)[reply]

It seems that you know enough on that subject to point that out yourself? I am doing a report on "Transform-based Image Coding", so I am interested in any changes that can occured on this page. Also I think your definition is right thus you should change it with your words. It would be a good improvement. -- -M-ric 07:02, 4 May 2006 (UTC)[reply]

pixels per line?

Um. "The average TV displays the equivalent of 350 pixels on a line, but the TV signal contains enough information for only about 50 pixels of blue and perhaps 150 of red. This is not apparent to the viewer in most cases, as the eye has sophisticated systems for "re-building" a sharp image based on clues from contrast and edges." I don't think the number of pixels is reduced at all- rather it's the range of color in a pixel that is reduced. --206.79.158.100 22:49, 14 September 2007 (UTC)[reply]

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