Keywords
resolution, sub-sampling
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Abstract
With the recent rapid growth in the number of television
formats systems and data compression, it has become rather
difficult to establish exactly how they relate to each other.
There are frequent arguments over whether one system is better
than another, usually supported by reference to image dimension
and chroma sub-sampling algorithms, but none of the number
sets adequately describes the viewers’ experience of
resolution.
This paper proposes a new unit, intended
to express the relationships between sampling structures
and image
formats in a human way, and I have christened it the “Rel” (unit
of relative resolution).
An amendment to page 2 of the document
was made on 27th May 2004 which now reads: "Clearly,
moving from interlaced to progressive gives an improvement
that accords reasonably with observations, and 720P
neatly slots in as being similar to but not as good
as 1080I, again closely matching observation."
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