white spots in picture

[bisque]

Hello...

I keep seeing white spots in the picture; they are embedded in the program as I can see them when I go back and step through by frame. they only exist for one frame and are usually larger than a single pixel of the TV, but still quite small.

I've changed HDMI cables; however since they are in the recording... I doubt it's anything on the TV side of the receiver.

something in the broadcast by Dish? issues somewhere from the outside Dish to DVR ?

its a 722, on a 52" HDTV so I can see all the broadcast issues.

I seem to notice it most on HBO; particularly noticeable today; but I can pick it out occasionally on other channels.

just fishing for ideas...

 

[Jim S.]

Are these random spots or do they form a pattern? Some studios put dot patterns in theatrical movies so they can tell which print a bootleg came from. I don't know if they do that with the versions sent to TV channels.

 

[KAB]

Electrical interference somewhere?

 

[bisque]

Doesn't seem to follow any pattern, seems quite random. With one particularly large one captured in a still frame, I was sure I could see compression artifacts around the edges...

I'll try to get a picture of one. Wouldn't hurt to run new cable, part of the run was already in place in the house when installed.

 

[vegassatellite]

Sounds like satellite eclipse. However, they usually only affect analog transmissions. Twice a year, the sun will be positioned behind each satellite for a few minutes. In the C-Band days, this would eventually grain out your picture for a few minutes. If a feed is being sent to DISH from an analog source before encoding to digital, its possible those grains are being encoded.

I too have heard of the digital serial number being embedded in the film itself. It may appear random, but over several frames it can be a pattern that yields a "fingerprint" of sorts. Just like they do with yellow spots put on paper by printers. To trace a document back to the printer.