[mythtv-users] DVI v. Component

Adam Clarke adam at ngindex.com
Wed Aug 11 20:32:24 EDT 2004


This is exactly what i thought. However, my experiments have found you 
really need to take into account any scaling on the video thats done 
between the source (normally the video output card) and the display its 
been shown on. If video is scaled it tends to look horrible, it tends to 
be blury. For interlaced displays, flicker fixing on the video output 
also makes a difference on quality, within a GUI, flicker fixing on the 
output is great, and helps the text be easier to read. Flicker fixing 
while displaying video tends to give a lot softer look to the video output.


Cory Papenfuss wrote:

>     My understanding of DVI is that it's a multifaced spec.  It can be 
> digital which I suppose would be best, and probably affected by 
> broadcast flag for new equipment.  It can also have analog (RGB), so 
> then it's basically the same as component.  Some people argue that RGB 
> is better than component, but it's rather academic and depends on what 
> the original source is.  Most digital video is encoded with YUV rather 
> than RGB but the quality wouldn't be degraded unless it's converted 
> from RGB to component in analog (e.g. A960 "transcoder"). I guess one 
> could argue that it's slightly reduced quality.  I guess it would go 
> something like:
> RF-modulated composite < Composite < Svid \
>     < Component < RGsB < RGBHV = DVIanalog < DVIdigital
> Whew! :)
> -Cory
> *************************************************************************
> * Cory Papenfuss                            *
> * Electrical Engineering Ph.D. Graduate Student                         *
> * Virginia Polytechnic Institute and State University             *
> *************************************************************************
> On Wed, 11 Aug 2004 gabe at mustbethemoney.com wrote:
>> All this talk of video quality (and it has been an education, and I have
>> learned a hell of a lot on how it all works), leaves me with just one
>> question regarding DVI in/output.  This has not been mentioned much, 
>> but I
>> am assuming that if the TV has a DVI input and you have a card with DVI
>> output that is the best possible signal-better than component?  From my
>> understanding, this is a pure digital signal that the TV can then 
>> convert
>> to an analog image, whereas a component output converts the digital 
>> signal
>> to a very high quality analog signal with the chominance and luminence
>> information.  Is this correct?  And if so, are we then talking bout:
>> RF<Composit<S-Vid<Component<DVI ???
>> Also, I know this has been mentioned before, but how will DVI be 
>> affected
>> by the broadcast flag?  Will TVs with DVI inputs sold after June next 
>> year
>> not take an input that does not have the flag?
>> _______________________________________________
>> mythtv-users mailing list
>> mythtv-users at mythtv.org
>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>mythtv-users mailing list
>mythtv-users at mythtv.org

More information about the mythtv-users mailing list