[opendtv] Re: HDMI issues
- From: Jeroen Stessen <jeroen.stessen@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 27 Feb 2006 10:09:49 +0100
Hi,
Bert Manfredi wrote:
> According to The Perfect Vision, p.43 in print version or p.31 at
> http://www.avguide.com/servlet/download/2485.pdf?download=yes
I can't download that because I am not registered. And generally I wish
to keep it that way.
> HDMI outputs are typically less accurate and more distorted than
component
> video outputs, in a survey of DVD players. See under the heading
"Surprising
> Results."
> Of the many products reviewed, only the Denon DVD-1920 and the Krell
> Showcase provided better results with HDMI, and the others either
> considerably worse (color shifts, image distortion), or almost
> indistinguishable but not as good.
Can you please define "component video outputs" ? Are those SD interlaced
(480i), SD progressive (480p), or HD up-converted (720p or 1080i) ??
I assume that the HDMI outputs are always up-converted to HD.
Because, if the analog outputs are SD and the HDMI output is HD, then a
conversion should have been done from Y'CbCr Rec.601 to Y'CbCr Rec.709.
It's in the Gamma Sutra:
http://www.poynton.com/DVAI/DVAI_TOC_full.html#26
If either the source or the display forgets this distinction between SD
and HD formats (thank you ATSC...) then a lot will go wrong.
Best regards,
-- Jeroen
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