HDTV Video Connections or why is everyone fat on My TV?

Part III
The Final Frontier
A few light years ago, we started to explain some of the small nuisances associated with HDTV, resolutions, scaling, connections, and a plethora of raw details that were fascinating and others plain boring. It is time to close this topic and move on to more interesting subjects, ie HDTV tuning and recording on your PC using Vista Media Center and Windows 7. You just can’t wait, neither can we, but let’s finish the business at hand.
Everyone is fat on your HDTV and disproportionately wide because you are not viewing a high definition program formatted properly. Your TV or set-top cable/satellite box is taking a standard definition 4:3 ratio signal and stretching it across your 16:9 ratio HDTV’s screen. This is distorting the picture content and one of the more heinous problems when viewing SDTV(Standard Definition) on a HDTV(High Definition) systems. Sounds like a bunch of perversion or STD’s(set-top diseases, got you!), it is. Some of you are paying for HDTV program and only viewing SDTV. How do your cure this without killing the HDTV? It is sometimes easy and some times impossible.
Let’s dive into our most recent example. Comcast Cable broadcast their HDTV channels in the 200-channel range. SDTV is below the 200 range and some are above 300. All my HDTV channels, when not broadcasting HDTV programs are proportional and correctly formatted to 4:3 with black side panels, as they should, since this is a digital HDTV signal. When tuned below the 200 channel all the pictures stretch to fit the screen. This is one of those aggravating big brother cable company problems, which you have to tolerate. The HDTV then actives the scaling that stretches a SDTV 4:3 picture to fit the 16:9 screen.

How do you fix this problem? On some set-top box, you can set the box to output 480i, 480p, 1080i or 720p. This sound like a good idea, but don’t. Setup the box to output the native channel resolution or pass-thru. The electronics in most new HDTV’s are far superior to the set-top box and does a better scaling job then any set-top box. If the picture has to stretch to fill, it will be a better stretch. ESPN, ABC and Fox HDTV broadcast fast action sports and use 720p, for better image performance. You will want these channels in the native 720p. How can you tell if your set-top is native? When you changing channels you will get a slight hesitation as the HDTV’s scaling adjust. You can also press display on your TV’s remote control to check the channels resolution. If any of your 720p channels are at a different resolution other than 720p, your set-top is scaling. Contact your HDTV provider and get them to set-up for pass-.thru.

One other thought on the situation, if you are not using a component video or HDMI connection from your set-top box or DVD player you can not get a high-definition picture. See our connection guide on all the types of video connection options available.

http://www.ramelectronics.net/howto-av.ep

Finally, with all the programming available online many are connecting their PC’s to the HDTV. This is simple if you have VGA or HDMI outputs from your computer and matching VGA or HDMI connections on your HDTV. A cable connection will be sufficient. However, if the outputs and inputs are different types or resolutions, there are a number of converter options available for matching the two, but we will save that for another discussion.

HDTV Video Connections or why is everyone fat on my TV?

We get a few questions on connecting DVI, VGA and component sources, equipment and monitors. In Part I, we will discuss various DVI connection types. Our Part II will look at the popular VGA and component connecting options. Part III will cover scalers/converters for different display configurations, and we will throw in some switching.

Part I

DVI

DVI comes in three different formats DVI-D, DVI-A and DVI-I. What are the differences?

DVI-D, which is the most popular, is an all digital video only signal and the predecessor to HDMI. On consumer devices it will have a HDCP(High Definition Copyright Protection) features to prevent non HDCP devices and displays from connecting and copying the signal. This feature requires a handshaking by all equipment to verify that the equipment connected is HDCP. Some earlier monitors designed for computer application are not HDCP compliant. They will work with a computer, but not with set top boxes, DVD players and other DVI consumer electronics that require HDCP compliance. All second-generation HDMI connections are HDCP compliance. Since DVI preceded HDMI it is backward compatible, if the DVI equipment is HDCP compliant. A simple DVI to HDMI adapter or cable can connect HDCP compliant equipment.

DVI-A is an analog display connection only and compatible with VGA. DVI-A to DVI-A only cables are very difficult to find, since the design purpose of DVI was a digital interface. DVI-A to VGA cables are used with some graphic cards and Mac computers that have a dual purpose DVI-I connector, which leads us to the next configuration.

DVI-I is a combination DVI-D and DVI-A connection. You can find these on high-end video cards, frontal projectors, and Apple Mac computers. They are used to save real-estate on the output connection interface. By using a DVI-D/VGA splitter or adapter you can chose either the digital or the analog connection for your specific requirement. This is application dependent.

HDMI is the next generation of DVI and digital only. HDMI has digital sound included in the connection, however when you adapt from DVI to HDMI no audio is passed.

Note when connecting a DVI/HDMI connection to your computer the native computer resolutions available will not be a HD TV’s 720P/1080i format signal, unless your video driver has HDTV outputs resolution settings. There are third part programs like PowerStrip, which are not perfect and require experimentation to match computer output resolutions to HDTV displays. The ultimate solution is an external scaler/converter, which you can program to match the display input requirement, independent of the signal source.

Stay tuned for part III when we discuss scalers.

http://www.ramelectronics.net/html/howto-av.html

http://www.ramelectronics.net/html/powerstrip.html

Converting Component Video and Digital Audio to HDMI

Converting Component Video and Digital Audio to HDMI

OK, we hear some of you snickering and saying - "Convert Component Video and digital audio to HDMI? Why? Doesn't just about every HDTV have both nowadays?"
Well, yes, that may be true, but there are still some very good reasons why a lot of people still want to do this. All of the reasons are based around running a single HDMI cable to your display for audio and video, or as near to that ideal as is possible. So, if you can turn all of your sources into HDMI, you can use an HDMI Switcher to Select between your sources and run a single cable, or very few cables, to your display.

A) Wall mounted Plasma or LCD Display
Even if you run the cables through your wall, this can be a tricky bit of business. You have to get in-wall rated cables. You have to carefully route them through your wall without breaking them. You may need complicated and more expensive wall plates with multiple connectors for all of those cables. Basically, every added cable makes it that much harder and more expensive to hide your cables.
B) Projectors
This is almost self explanatory. You usually have to run some pretty long cables over to your projector from your A/V rack. Some people run them through ceilings, some through walls, some through raceways and some, well, they just find a way to get them there. The longer the cable the better it usually has to be. Better is more expensive, and in-wall rated and better, gets more expensive still. Have to run Plenum to be within code? Ouch!

C) Neat Freaks (or those with very high WAF levels)
All those ugly cables behind a nice piece of furniture can make even a normal person cringe. If you are a "Monk" like being, or have a significant other who keeps getting enthralled by Bose commercials, with that "no visible cables" look, well, if you can keep things to a sane level, you may be able to keep a happy household. You'll still have to think of something for those speaker cables, but we'll tell you your way around that another time.

What you need:

Component Video and Digital Audio to HDMI

If you need a model with analog stereo audio here's the one you need:
Convert Component Video and analog Audio to HDMI

Need to convert two Component Video sources with audio as well as switch two additional HDMI sources?
EXT-HOMETS

Want to convert Component Video and Composite or S-Video as well as switch two HDMI sources, outputting everything to HDMI?
EXT-HOMETSP

Have a Computer you want to connect through HDMI? If you need DVI and audio there are ways to do that as well.
Convert DVI and Digital Audio to HDMI
or
Audio Authority Model 1311


Need an HDMI Switcher?
HDMI Switchers