how do you eliminate artifacting, pixelization or choppy colored blocks in a HD Television?

Answer 1

There could be a number of reasons why you're getting those artifacts and blocks, and it's not always about the connections you use.

One would be your TV itself--this is particularly a problem with cheaper or older LCD TV sets; their response times are just not suited for fast-motion video.

Another is the signal that's going into the TV. While, yes, your connection and output settings do matter to some degree, an improper output setting (like setting your receiver to output 480p instead of 1080i) would NOTcause artifacting and pixelization, but rather a softer, less detailed picture.

If we're talking dish, digital cable, and over-the-air digital broadcasts, then you have to keep in mind that we're dealing in the digital realm--your picture is built from streams of data going to your box/receiver then to your TV. There's a finite amount of bandwidth that's used, so the signals are often compressed to save bandwidth, and that unavoidably shows up on the TV. It's also possible that the incoming signal is affected--your cable may be faulty, your dish may not be aligned right, or your rabbit ears may need repositioning.

When we're talking DVD's, then there are two factors to look at--the DVD player, and the DVD itself. Remember that these gizmos are really just dedicated computers, and some computers just have better hardware; so some DVD players process the information from the DVD better than others, and a big-screen HDTV would make any deficiencies more obvious--a picture from a $30 Cyberhome will simply not look as good as a $200 Samsung. And again, while connections do matter--an HDMI connection is better than a component connection is better than an S-Video connection is better than a composite connection--they have little to do with the artifacting problem you mention.

The problem could also lie with the DVD itself. Again, it's about video being digital data; there's a limited amount of space on DVD's, and some DVD's devote less space to the film in favor of extras and special features; other DVD's--cheapies, indies, and whatnot--are released as single-layer DVD's, which hold only about half as much data as the dual-layer format most commercial releases come in. So, like with the digital data from dish or cable or over-the-air-digital signals, the picture is compressed to fit the DVD, and the compression will be more evident on a big-screen HDTV.

So in many of the cases above, there's little one can do other than upgrade--if it's an issue with a TV, you'll have to consider getting a new one. If it's your Dish service, you may have to consider trying out cable to see if it provides a better signal. If it's your DVD player, you may have to shop around for a better one. If it's your DVD, perhaps there's a better version available (some movies are available in "Superbit" DVD's, which devote nearly all of their data space to the movie itself and include no extras or fancy menus).

Answer 2

I posted this to answer another posters similar question,, this is what I found out after a week of experimenting,, and i have a electronics degree!!

Ah, yes my friend, I can answer your question. It took me 1 week after work to delve the reg tv to hdtv problem. The salesperson doesn't know how to adjust the various boxes in the change. When I got my 32" LCD HD ready tv and hooked it up to the cable box the pic looked like crap. solid colors in the back gfround where "boubling" and everything was washed out. Even the reg off the air tuner built in wasn't that good. The secret is to get an HD box from the cable company,, mine is a motorla comcast box, and set it as follows:

The set up from tha cable box for the best picture I've found is

TV type : 16:9
ypbpr output : 1080i
4:3 override : off
This is for a Motorla DTC6412 box,, others should be similar.

What this is doing is allways driving the TV with a 1080i signal,, allthe conversion is done in the cable box,, from 480i standard tv to 1080i for the best possible picture.

you can feed 1080i to a HDTV from several sources, hdmi or componant, I use the componant cable that comes with the cable box from comcast which is a 5 line cable: ypbpr.

componant video isn't the same as RCA, Componant is ypbpr with with a L & R sound output and deos carry 1080i

also, for viewing dvd movies:
Drive with an HDMI cable.
What you need to buy is an 'up converting dvd player' a samsung dvd-hd850 is a good example. it will convert the ntsc,, 480i to 1080i and send it up the hdmi port to the hdtv. Set the DVD player to output 1080i. The TV can display 480i, 480p, 720p or 1080i,, set carefully and you should be impressed with the picture,, however,, the dvd's resolution is just 480i, unforunatly, even in wide screen. For a full HD picture the TV is capable of we must all go out and purchase the new hddvd or blueray players from sony and others. that will give you full hd picture,, but the cost is a little out of the ball opark right now,, about 500 for the hddvd brand and 1000 for the blueray,, same output but diff dvd formats. You also have to buy the dvd on hddvd or blueray format too,l won't work with the present dvd's, info just isn't there, wait awhile on these. C.

so to sum up,, hdtv cable box set to 1080i output pushing through a ypbr componant cable.

***!!! you adjust the cable box output with the cable box OFF and the TV on,, hit the red MENU button once. don't hold it down, just a light hit, or it will just flash on the screen. from this output setup screen you can adjust the cablr box output drive. set to
TV type : 16:9
ypbpr output : 1080i !!!!
4:3 override : off
. hit menu again to save.!!!***

and a "upconverting dvd" player driving through a HDMI cable and set to drive at 1080i.

There you go,, happy viewing. C.

Answer 3

Do you have an HD signal? (Sorry to ask...) Maybe you need a new converter for your cable or dish. You can't just hook up an HD TV and get it to work without the right incoming signal.

Otherwise, these blocks just sometimes happen, but it should be rare. It is due to interference in the incoming signal when it happens on occasion and you just have to deal with it. It is emerging technology...

Answer 4

Those things in an HD signal are the equivalent of snow in the old-fashioned analog TV. Its gonna happen....

Answer 5

i dont know

Answer 6

no idea, sorry