Do I need both DVI and component video interconnects to HDTV?

[dubbing wax]

This may sound like a stupid question but can I use a single DVI interconnect between my HDTV cable box and HDTV? Must I also provide another interconnect like component video between the cable box and TV to capture any non digital signals?
My Time Warner HDTV cable box has both component and DVI. I have been using the component connection thus far, but feel like trying the DVI interconnect to see if there is any difference in picture quality, especially in HDTV broadcasts.
I know with audio you need to cover digital and analog output, is it the same with video?

 

[Duffinator]

It's not the same as audio. All you need is the DVI as it will carry all signals output from your cable box to your TV. Give it a try and see if you notice any improvement in picture quality.

 

[calgarianperson]

my cable company reccomends that I should rn DVI for HD broadcasts and also S-video for analog broadcasts. Although I haven't yet tried it other people have stated that with DVI there is a loss in analog signal quality and another interconnect (they recomended s video) would provide better results on those channels.

 

[Duffinator]

my cable company reccomends that I should rn DVI for HD broadcasts and also S-video for analog broadcasts. Although I haven't yet tried it other people have stated that with DVI there is a loss in analog signal quality and another interconnect (they recomended s video) would provide better results on those channels.

I've heard that as well although I don't think there will be much difference between the DVI and the component connections. I'll have to give that a try. I have a Samsung HD DirecTV box connected with component cables and a DirecTV TiVo connected with s-video. The SD picture looks better with the TiVo box than throught the HD box. The HD box looks a bit softer for some reason. Im buying a DirecTV HD TiVo in a couple of weeks and since I'll have an extra s-video cable I'll hook them both up to see if there really is a difference in the output or if my current observations are more hardware related.

 

[Rex]

This may sound like a stupid question but can I use a single DVI interconnect between my HDTV cable box and HDTV? Must I also provide another interconnect like component video between the cable box and TV to capture any non digital signals?
My Time Warner HDTV cable box has both component and DVI. I have been using the component connection thus far, but feel like trying the DVI interconnect to see if there is any difference in picture quality, especially in HDTV broadcasts.
I know with audio you need to cover digital and analog output, is it the same with video?

The DVI interface in this instance is probably only DVI-D for your video performance not for audio. My LCD TV has a DVI-D plug and Analog for Audio. If your TV has a DVI-I then it should support both Digital and analog sources and you shouldnt have problems Analog drop since DVI has the bandwidth available and is backward compatable with HDMI.