----- HDTV Magazine Tips List -----
Rodolfo,
Thanks for the info.
for a more in depth explanation of all this craziness...
DVI - video levels and color space
http://www.hdtvmagazine.com/forum/viewtopic.php?t=5427
HDMI - video levels and color space
http://www.hdtvmagazine.com/forum/viewtopic.php?t=5317
Richard Fisher
www.HDLibrary.com Published by Tech Services
A division of Mastertech Repair Corporation
Rodolfo La Maestra wrote:
> ----- HDTV Magazine Tips List -----
>
> Richard,
>
> I agree with you that one the signal is out a DVI or HDMI connector or plug adaptor would not
> provide differences on the video signal, but in order to make totally sure I crossed emails with
> Silicon Image, and they confirmed our position:
>
> "The issue isn't conversion between HDMI and DVI, it's conversion from the DVD player's internal
> YCbCr signal to RGB before transmission. (There is no external conversion, other than that the
> cable used has an HDMI connector on one end and a DVI connector on the other.) The YCbCr-->RGB
> conversion is done because the source detects that the display is a DVI (hence RGB only) device.
> Some of the YCbCr converters used in HDMI transmitters (such as the Zoran used in this device?) will
> clip the below-black and above-white values when converting."
>
> The remarks were provided by Paul Wolf, one of the writers of the DVI/HDMI specs.
>
> In other words, the review seems inaccurate in the way the subject was presented; I would not be
> surprised if a senior editor changed the meaning of the content when doing a magic correction, they
> did that to me several times and the best I got was that I have a shot at the final a few hours
> before it gets to printing.
>
>
> Best Regards,
>
> Rodolfo La Maestra
>
> -----Original Message-----
> From: HDTV Magazine On Behalf Of
> Richard
> Sent: Monday, July 11, 2005 10:26 AM
> To: HDTV Magazine
> Subject: Re: HDMI versus DVI
>
>
> ----- HDTV Magazine Tips List -----
>
> Thanks,
>
> The problem I have is I am reviewing the Toshiba SD5980 and it has only
> an HDMI connector yet in the review he claims it performs correctly via
> HDMI but not DVI or vice versa. That does not make sense since the only
> way you can get DVI is to use an adaptor to HDMI and the player has no
> idea that is going on. On top of that I tested it via HDMI and it had
> incorrect levels as reported for DVI only...
>
> ?
>
> On another note how can a company release a player with DVI/HDMI and not
> have it HDCP compliant? Apparently the Bravo D1 and D2 plus this new
> Oppodigital player are not.
>
> ?
>
> Richard Fisher
>
www.HDLibrary.com Published by Tech Services
> A division of Mastertech Repair Corporation
>
> Rodolfo La Maestra wrote:
>
>>----- HDTV Magazine Tips List -----
>>
>>Richard,
>>
>>You are correct, DVI and HDMI connections have the same technical capabilities for transporting HD
>>video, but a player can do proprietary video conversions before the signal is output to the DVI or
>>HDMI wire, and mess around with the quality unfortunately, he is making reference to those,
>>including comparing it with component analog outputs on the same player.
>>
>>Although this is not telling that the connection is superior or inferior in general terms, it is
>>giving a clear message that having DVI or HDMI outputs does not necessarily guarantee perfection
>
> if
>
>>the equipment that uses it is not well designed.
>>
>>Best Regards,
>>
>>Rodolfo La Maestra
>>
>>
>>
>>-----Original Message-----
>>From: HDTV Magazine On Behalf Of
>>Richard
>>Sent: Monday, July 11, 2005 8:40 AM
>>To: HDTV Magazine
>>Subject: HDMI versus DVI
>>
>>
>>----- HDTV Magazine Tips List -----
>>
>>What have I missed on this topic?
>>
>>What I have read stipulates that there is no difference for digital
>>video using either format. Per this review piece the author states
>>several times he had two different responses depending on whether he was
>>using DVI or HDMI.
>>
>>http://www.hometheaterhifi.com/cgi-bin/shootout.cgi?function=search&articles=122
>>
>>?
>>
>>Richard Fisher
>>www.HDLibrary.com Published by Tech Services
>>A division of Mastertech Repair Corporation
>>
>>
>>
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