[mythtv-users] Audio over HDMI: my story

Jean-Yves Avenard jyavenard at gmail.com
Wed May 6 04:44:37 UTC 2009


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.


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