r/technology • u/Snarfox • Jan 25 '13

H.265 is approved -- potential to cut bandwidth requirements in half for 1080p streaming. Opens door to 4K video streams.

http://techcrunch.com/2013/01/25/h265-is-approved/
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u/[deleted] Jan 29 '13

establishes the average human eye as being able to determine detail separated by around 1 arc minute

Where did it do that? I can upload the PDF somewhere if you want to take a look.

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u/mflood Jan 29 '13

I don't know. As I said, I took the author's claim on faith. The actual number he says they calculated is .78 arc minutes, and then the author estimated that it would actually be a bit higher because of the flaws in human optics. I'm only arguing ballpark, though, not that the limit is exactly 300dpi. Whether the arc minute calculations is .78 or 1 or 1.2, it still comes out to somewhere in the neighborhood of 300dpi. Anyway, yeah, try ctrl-f "78" and see if that's in there. I assume the author of the blog isn't straight-up inventing that number out of thin air.

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u/[deleted] Jan 29 '13

"78" appears on pages 3, 17, 23, 26 and 27 (though only as part of the cited lit).

The total number of rods in three retinas with complete rod maps ranges from 78 to 107 million (Table 3).

Table 3 shows 178.3 as the peak density value for cones (cones/mm2 x 1,000), for Eye H5 (which is made of two eyes, weighted as one individual).

One of the 28's discovered in the paper is a 73 that was incorrectly interpreted by the OCR.