I use an HD antenna for my tv.
Even when the antenna signal is showing good to excellent, I still get irritating "pixelation" in the picture.
Doing a channel rescan does not help.
Is anyone else experiencing this?
This never happened with analog TVs.
Digital is different than analog. It takes more signal for digital as a
general rule. Analog will fade in and out, sometimes even from an
airplane going over. If a digital signal is not received at 100% you
will get the pixelation. It is an either on or off condition where
analog will just fade. Sometimes on the old analog you would see what
is called a ghost. Where one picture will seem to overlay another but
be an inch or so to the right. This is when 2 signals arrive at
different times. If this hapens with digital, you may get the
There is nothing special about a HD antenna. Just advertising hype. It
is the same as the old UHF antenna.
On Thursday, May 10, 2018 at 6:07:11 PM UTC-4, Andy wrote:
t irritating "pixelation" in the picture.
It doesn't have to be 100% signal strength. It doesn't even have to receive
all the data correctly, there is error correction built in. But when it de
grades enough that there are unrecoverable errors, then it shows up as pixe
lation. With an analog system it showed up as a less than perfect picture o
r snow. Also, with HD any imperfection is going to be more noticeable than
on a low resolution one.
If this was working, but suddenly isn't, could be a cabling problem, poor c
onnection, etc. If it's always been marginal then a better antenna and/or l
ocation could help.
Not exactly true:
A digital signal is error corrected.
Something less than 100% can still result in a 100%
Only when the error threshold is exceeded do you see
Nothing ridiculous about it.
What you are seeing is the digital OTA TV equivalent to the "snow" seen
on old-school analog TV.
The pixelation can be caused by more than a weak signal at your antenna.
Distortion anywhere along the digital path can cause it.
It does occur sometimes on my Comcast cable TV, but not very often.
If you are getting good signal strength and providing
nothing temporarily walked in front of the antenna
that would decrease your signal, then what you are
experiencing is an issue with the signal coming
from the TV station.
The way HD works is that they try to save on bandwidth
by "compressing" the digital signal. What this means is
that they scan the data for repeats and create a table of
repeats. Then they send the table. Your end then recreates
the repeats based on the information in the table.
This works well, unless there are few repeats or there
is a lot of changes in the data all at once that won't
fit down the pipe, then they just drop the extra data
and you get your "pixelation".
Drives me nuts when Arron Rodgers is about to pass and
it getting chased by someone.
There is nothing wrong at your end.
I hate commercials too. I have Comcast cable with X1 DVR and DVR all I
watch so I fast forward through all commercials. Netflix is great and
can be shared as long as not in use by maybe 3 viewers at one time.
They do not need to be in the same home or state for that matter.
I am strictly OTA, but get the same effect using a Tivo-on-Steroids app
It even has an add-on that claims to automagically skip over commercials, but
it's so easy to just hit the 60-second jump and then a few 10-second jumps
that I never bothered to look into it.
It's been at least five years since I have seen or heard more than a few
seconds of *any* TV commercial.
My first antenna was "HD" (Channel Master 4228), then I got the pixellation
issues (in this case I think it was a neighbor's tree having grown into the
signal path) and, coincidentally learned that "HD" means nothing in the
context of OTA antennas.
I left the "HD" in place - strapped to the chimney:
But supplemented the "HD" with one of these Bad Boyz:
mounted on my garden shed and aimed at the antenna farm that
supplies virtually all of our local TV channels:
The Windgard is *Huge*, but does the job.
Per https://www.antennasdirect.com/transmitter-locator.html , that
antenna farm is less than 35 miles away - looks like about 15...
Now my TV's "Antenna" input is still connected to the old "HD"
Channel Master, but my Tivo-On-Steroids PC application that is connected to
SiliconDust digital tuners gets all it's input from the monster Winegard
HD7084 and life has been good.
On Thursday, May 10, 2018 at 4:24:48 PM UTC-5, Andy wrote:
As a retired scientist, I did some experimentation.
Using a piece of foil about 8 x 11 inches, I laid it on top of my indoor antenna in different positions.
It increased the signal strength to good for ALL channels except 13.
Rotating the antenna fixes channel 13.
Have yet to see any pixelation. :-)
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