High Def Forum
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Dvi/hdmi

escalde75
12-10-2006, 11:45 PM
I recently got the 3250HD cable box from Time Warner Cable. The box has no HDMI input but a DVI input but a component imput, my HD TV only has one component and I use that for xbox 360. I got a DVI to HDMI cable but i have to sacrifice lots of picture quality which i do not want to do. In theory shouldnt the picture be better than component because it is a digital cable box? I am looking for any suggestions to fix this. Any help is appreciated!

ecat
12-11-2006, 12:26 AM
dvi-hdmi will give you the best picture quality,you will need another connection for sound.red/white rca or digital fibre optic, or coax.

JoeProcopio
12-11-2006, 10:26 AM
DVI-HDMI is digital, just like HDMI-HDMI...1s and 0s are 1s and 0s...the only thing HDMI gives you over DVI is audio in one connection....that is why next to the DVI connector on your box, it should have left and right RCA audio output connections. if you have a surround sound, i would run optical out of the box to the surround sound (if it has optical), keep everything digital...and also run L/R to the TV so you don't need to always have the surround on if you don't need 5.1...(ie: regular shows that don't broadcast in surround)

component out of cable boxes is ANALOG component, and although it is component HD, it isn't digital, the digital signal is the best signal, then component analog, then S-video, then composite.....

escalde75
12-11-2006, 10:42 AM
The audio is not a problem, i just lose picture quality when using DVI to HDMI. I'm looking for any suggestions to fix this.

JoeProcopio
12-11-2006, 10:56 AM
lose picture quality how? compared to what signal? if you can't see the HDMI out of the box, since there is no HDMI output, you are comparing DVI-HDMI to what, the component? again, component is analog, if you are getting a better picture through component compared to the DVI-HDMI into your TV, then i would suspect 1 of 3 things, the cable box, the cable, or the HDMI input of your TV....are you using a quality DVI-HDMI cable? i got one off ebay for 18 bucks, Monster 800 DVI-HDMI...it's too bad you don't have a true HDMI source to compare the DVI-HDMI to...do you have someone you can bring the cable box to to compare on another TV? or anyone with a box with HDMI outputs?

escalde75
12-11-2006, 11:24 AM
I am using a monster cable. The DVI input is in the back of the cable box while the HDMI goes into the back of the TV. I also have component which is giving me better PQ on HD and SD.

ecat
12-11-2006, 12:27 PM
I am using a monster cable. The DVI input is in the back of the cable box while the HDMI goes into the back of the TV. I also have component which is giving me better PQ on HD and SD.

Make sure you have the output of your cable box set to 720P or 1080i,click the info button on your tv and see what the incoming resolution is.There is no way you should be getting better quality from component.I think you just need to cofig your output on the cable box,usualy they are set to 480P.

escalde75
12-11-2006, 03:15 PM
I turned the output of the box to 720p and nothing else because that is the native resolution of the TV. Will this cause a problem with HD channels broadcast in 1080i?

ecat
12-12-2006, 12:19 AM
I turned the output of the box to 720p and nothing else because that is the native resolution of the TV. Will this cause a problem with HD channels broadcast in 1080i?

Did this improve the PQ via hdmi-dvi connection?,not to sure what you mean by nothing else?HD channels wich are 1080i will be converted to 720P.

jcarno
12-12-2006, 07:56 AM
I'm not sure where escalade is from but I have the same box and service and i'm in upstate N.Y. On my box, the DVI out is inoperable. The guy at TWC told me it was. Then he tried selling me a more expensive DVR box that had a working HDMI out. I ve tried everything to get the DVI out to work. I keep getting a warning about copy protection. When I clear the warning, the picture is mostly blue in color and looks horrible. Anyway, I have my pc hooked up via DVI/HDMI to this set and it looks great. I've downloaded as much HD content as I could find on the web and it looks stunning. I'm currently using component from the box to tv and that looks great too. In my area, TWC only has 4 HD channels.

durbin
12-12-2006, 10:02 AM
According to the 3250HD user guide, you must use the component output ports to provide HDTV signals to your HDTV.

durbin
12-12-2006, 10:04 AM
According to the 3250HD user guide, component output ports must be used to provide HDTV signals to your HDTV.