480p HD?

[Chris Borjis]

well, progressive 480 being 480P I can understand, though I don’t know why apple would call that HD.

JVC I can understand.

The HDxx series cameras have a special HDV 480P mode that
records SD in progressive.

[Tony]

480P was once called Advanced Television.

I demo’ed several times 480P footage I shot and many viewers mistook it for 1080 HD.

I nicknamed 480P “poor man’s High Def”

Damn best looking Standard def by far.

Too bad it never caught on but that’s another story.

Tony Salgado

[Jeff Carpenter]

Ok, here’s your answer! (That I just made up.)

HD has less to do with pixels than display size. If you put DVCPRO up on an IMAX screen it wouldn’t look quite so “HD” anymore, would it?

So you’ve got to look at this in a “pixels per inch” kind of way. Using some very hasty math I just determined that a 480p file on my 23″ screen (at a height of 5″) has roughly 3 times the pixel density than a HD picture on a 50″ 1280×1080 HDTV (at a height of about 30″).

So that online trailer should appear to be 3 times as sharp as a network HD show! If “3 times as sharp as HD” doesn’t count as HD I don’t know what does.

I dunno. Any good for a made-up answer?

[Walter Biscardi]

[Shane Ross] “So how on EARTH can they call 480P High Definition?”

At NAB a guy who works for Nintendo came to me at the AJA Booth to ask how he would edit 480p HD material for the Wii. That’s their HD format. How 480p is called HD I don’t know, but that was the first time I ever heard of it.

I guess it’s really a progressive SD 16:9 format that scales up nicely to 720p?

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Broadcast and independent productions.

All Things Apple Podcast! https://cowcast.creativecow.net/all_things_apple/index.html

Read my blog! https://blogs.creativecow.net/WalterBiscardi

[Shane Ross]

Jeff, I’ll take that made up answer. Good one.

Shane

Littlefrog Post
http://www.lfhd.net

[Uli Plank]

Well, anything that has higher definition than SD can be called “HD”, I suppose.

If this is 16:9 and progressive square pixels, you’ll have 854 pixels horizontal vs. 720 and full 480 px vs. 336 perceived vertical definition (Kell factor for interlaced) in SD.

In CS it would even be 1128 px wide

[Christian Glawe]

I seem to remember that, for awhile, FOX’s HD channel was broadcasting in 480p – I think they’re 720 now, though…

[Chris Borjis]

[walter biscardi] “guess it’s really a progressive SD 16:9 format that scales up nicely to 720p?”

Exactly.

Those that have shot/edited/scaled the JVC HDV 480P to 720 had the same impression.

[Andrew Kimery]

I’ve always seen it fall in the “enhanced definition” catagory.

https://en.wikipedia.org/wiki/Enhanced-definition_television

-Andrew

[Graeme Nattress]

Kell factor is how resolution is perceived (due to the integration effect of the sampling filter on the display), but Interlace filtering is the actualy reduction in vertical resolution to avoid interlace twitter. Usually interlace filtering will reduce resolution to about 70% or so of the rated total. Kell effect effects all displays, the percentage being based upon the type of display, but is also in the 70% or so region.

– http://www.nattress.com – Film Effects and Standards Conversion for FCP