HD Pixelization

sponger246 · Post by **sponger246** » Thu Mar 08, 2007 11:55 am

My HD picture is great other than the random pixelization. Im watching the ACC Tournament in HD and when there is a zoomed shot on the court with players running down the floor (fast motion), the image starts to get pixelated. Its fine when its zoomed out. Any ideas on this one?

Right now Im connected with component cables. Will switching to an HDMI really make that much of a difference?

Thanks

Richard · Post by **Richard** » Thu Mar 08, 2007 2:37 pm

Cable, Satellite or OTA?

sponger246 · Post by **sponger246** » Thu Mar 08, 2007 3:48 pm

digital cable

Richard · Post by **Richard** » Thu Mar 08, 2007 3:54 pm

It could be the source easily checked by looking at the OTA image.

Cable and Satellite bit shave...
viewtopic.php?t=4175

Your compaint is quite common and one of my pet pieves... Thank god for HD disc!

sponger246 · Post by **sponger246** » Thu Mar 08, 2007 5:49 pm

So I take it that there is nothing I can do to fix it? Its all up to the cable service?

Richard · Post by **Richard** » Thu Mar 08, 2007 6:36 pm

Based on your description, yes.

If you have severe pixelation and blocking with still images or those with little motion then that would be a provider problem.

DTV compression is based on what is similar between frames therefore still images and those with little motion require little bandwidth to keep puttering along. Scene changes and lots of motion requires full bandwidth or you will get what you are describing.

Last year CBS did multicasting for March madness causing exactly that and more even over the air due to multicasting, multiple channels, which also robs bandwidth. As noted in that other thread there is a certain point of bit shaving where you are going to notice this and for multicasting that is about 2meg of bitstream and 1080I is far more senstive to that than 720P. Beyond that things start going to hell.

If you want to look into this further I suggest you find a local users group via Yahoo or the AVS forum to find out if the local is choking the signal. If not then OTA just may be your solution!

sponger246 · Post by **sponger246** » Thu Mar 08, 2007 7:13 pm

Could you explain or sum up what the OTA is?

akirby · Post by **akirby** » Thu Mar 08, 2007 10:59 pm

sponger246 wrote:Could you explain or sum up what the OTA is?

Over The Air - receiving your local stations ATSC signal via an antenna. This is the source for your cable programs and if the problem occurs there then it's not the cable company's fault. It is possible the cable company is shaving bits when they rebroadcast but chances are it's there OTA as well. You'll also notice it when watching a live musical performance with strobe lights or certain bright colors (like the red XLR at the super bowl a few years ago).

sponger246 · Post by **sponger246** » Sun Mar 25, 2007 6:20 pm

The pixel issue is somewhat better now that I have a larger, more protective cable running straight from the box to the back of the digital receiver and not through a splitter. My only issue now is with the "red colors". They look fine close up but on a distance shot they look like they are moving or they are bleeding out around the objects. I have tried to play with the red/green balance but have had no luck.

Does anyone have any other suggestions?

Richard · Post by **Richard** » Mon Mar 26, 2007 11:13 am

My only issue now is with the "red colors". They look fine close up but on a distance shot they look like they are moving or they are bleeding out around the objects.

That is odd considering the opposite is the typical experience. It does not make sense at all on this end...

My first thought is you don't have the STB set for an HD scan rate...