[opendtv] Re: Samsung Rep admits HDMI won't support 1080p until v.1.3
- From: "Prinyar Boon" <Prinyar.Boon@xxxxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 9 Nov 2005 11:58:33 -0000
The=20GTF=20is=20for=20analogue=20CRT's=20PC=20monitors.=20=20Digital/Matr=
ix=20displays=20have
greatly=20reduced=20blanking=20requirements=20compared=20to=20their=20anal=
ogue=20cousins
-=20the=20min=20possible=20clock=20rate=20is=20therefore=20much=20reduced=20=
-=20lower=20than
equivalent=20Broadcast=20model.
Prin
-----Original=20Message-----
From:=20opendtv-bounce@xxxxxxxxxxxxx=20[mailto:opendtv-bounce@xxxxxxxxxxxx=
g]
On=20Behalf=20Of=20Ron=20Economos
Sent:=2009=20November=202005=2011:05
To:=20opendtv@xxxxxxxxxxxxx
Subject:=20[opendtv]=20Re:=20Samsung=20Rep=20admits=20HDMI=20won't=20suppo=
rt=201080p=20until
v.1.3
The=20pixel=20rate=20for=201080p@60=20for=20dual-cable=20HD-SDI=20(SMPTE=20=
292M=20and=20SMPTE
274M)=20and=20also=20DTV=20over=20HDMI=20(EIA_CEA-861-B)=20is=20148.5=20MH=
z.
Unfortunately,=20the=20pixel=20rate=20for=201080p@60=20from=20computers=20=
is=20something
over=20165=20MHz=20(as=20determined=20by=20the=20VESA=20GTF).=20The=20exac=
t=20pixel=20rate=20can
be=20calculated=20with=20this=20spreadsheet:
http://www.vesa.org/Public/GTF/GTF_V1R1.xls
So=20the=20problem=20with=201080p@60=20displays=20and=20the=20current=20cr=
op=20of=20165=20MHz
HDMI=20chips=20(or=20150=20MHz=20speed=20binned=20parts=20from=20Silicon=20=
Image)=20is=20that
you=20can=20do=20DTV=201080p@60,=20but=20not=20computer=201080p@60.
In=20a=20related=20area,=20the=20BBC=20has=20proposed=20a=20novel=20compre=
ssion=20scheme=20for
1080p@50=20and=201080p@60=20over=20single=20cable=20HD-SDI.
http://www.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP119.pdf
Ron
Jeroen=20Stessen=20wrote:
>Hello,
>
>Richard=20Hollandsworth:=20
>=20=20
>
>>FYI:=20I=20posted=20a=20copy=20of=20Samsung=20Rep's=20slide=20re=201080P=
=20and=20HDMI=20v.1.3=20at
>>=20=20=20=20
>>
>end
>=20=20
>
>>of=20this=20thread:=20
>>=20=20=20=20
>>
>http://hdtv.forsandiego.com/messages/460/3459.html?1131406822
>
>I=20don't=20see=20a=20problem=20per=20se=20with=201080p@60=20over=20HDMI.=
=202=20megapixels=20
>times=2060=20Hertz=20=3D=20120=20MHz=20pixel=20rate,=20plus=20some=20marg=
in=20for=20blanking.=20For
>a=20CRT=20display=20that=20margin=20would=20be=20excessive,=20and=20you=20=
would=20need=20165=20
>MHz=20pixel=20rate.=20That=20still=20falls=20within=20the=20limits=20of=20=
DVI=201.0,=20and=20
>since=20HDMI=20uses=20the=20same=20hardware=20as=20DVI,=20it=20should=20s=
till=20work.=20For=20
>matrix=20displays=20that=20don't=20require=20as=20much=20blanking=20time,=
=20it=20should=20be
even=20easier.
>
>The=20difference=20might=20be=20in=20the=20cable,=20though.=20HDMI=20typi=
cally=20uses=20
>thinner=20cables=20than=20DVI,=20and=20there=20might=20be=20a=20bandwidth=
=20limitation=20with
that.
>Also,=20the=20receiving=20end=20might=20just=20not=20be=20ready=20for=201=
080p,=20the=20chips=20
>that=20process=20the=20signal=20might=20not=20have=20enough=20bandwidth=20=
at=20their
inputs.
>
>The=2010-bits=20and=2012-bits=20story=20is=20a=20different=20issue.=20HDM=
I=20was=20designed=20
>for=20YCbCr=204:2:2=20signals,=20to=20replace=20the=20analog=20YPbPr=20li=
nks=20(common=20in
Japan).
>2=20pixels=20of=2012-bits=20YCbCr=204:2:2=20take=20as=20much=20room=20as=20=
2=20pixels=20of=208-bits
>RGB=204:4:4.=20You=20don't=20need=20any=20extra=20bandwidth=20for=20that.=
>
>So=20what's=20Samsung's=20problem=20?=20I=20don't=20know.=20
>
>Best,
>--=20Jeroen
>=20=20
>
=20
=20
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