[mythtv-users] Audio over HDMI: my story

Allen Edwards allen.p.edwards at gmail.com
Wed May 6 14:31:24 UTC 2009

On Tue, May 5, 2009 at 9:44 PM, Jean-Yves Avenard <jyavenard at gmail.com>wrote:

> Hi
> Sent from my iPhone
> On 06/05/2009, at 11:15 AM, Ronald Frazier <ron at ronfrazier.net> wrote:
>  My understanding is that the audio is inserted into the same data stream
>>> as
>>> the video so the cable/ adapter cannot make any difference.
>> I'm aware of that, but it was my understanding that DVI ports wouldn
>> not transmit audio. So I took a quick look at wikipedia and:
>> "Unlike HDMI, DVI usually carries no audio data. However, it is
>> possible for a DVI port to transmit audio data to a HDMI connection if
>> a DVI to HDMI cable is used"
>> So I stand corrected. I wonder when that sort of thing became possible.
>> --
> Sound is carried within the TMDS signal. So video and sound are using the
> same travel path.
> So being able to use a DVI cable in place of a hdmi cable has always being
> possible. As often DVI cable are cheaper and better build than many hdmi
> cables, it actually make sense to use a DVI cable instead.
> Funny that you never heard of people arguing wether a DVI cable could carry
> a 1920*1200 signal, yet many question if the quality of a hdmi cable is
> enough for a 1920*1080i
> Most new ATI video card only have a DVI output but do sound as well.
> Jean-Yves
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When you get a cable, if it is long, get a fat cable.  The larger the
conductors, the less loss and the better job it will do on higher speed
signals.  I have a 10 meter cable that works just fine to my projector and
it is a very large diameter cable (1/2 inch).
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