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Pixellation / macroblocking on Ch 253-256 in Boston area

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Copper Contributor
Copper Contributor
Posts: 5
Registered: ‎05-18-2010

Pixellation / macroblocking on Ch 253-256 in Boston area

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These four channels have been exhibiting major pixellation/macroblocking problems for the past few days. Previously they worked fine. Ch 259 also exhibits the same behavior. No other channels are affected as far as I can tell, just these (unfortunately, three of my kids' favorite shows are on 256, Nick Jr.).

 

I've had FiOS TV since January and haven't had any problems.  I use a CableCard-M with a TiVo HD XL. Everything has worked perfectly up until a few days ago, and I haven't changed any equipment. 

 

Any ideas?  Has anyone else experienced similar problems with these channels recently?

 

 

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Bronze Contributor II
Bronze Contributor II
Posts: 371
Registered: ‎12-15-2009

Re: Pixellation / macroblocking on Ch 253-256 in Boston area

Message 2 of 5
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I'm also in the Boston area. I just did a quick 5 second watch of each of them and didn't see any problems.

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Platinum Contributor III
Platinum Contributor III
Posts: 5,881
Registered: ‎07-22-2009

Re: Pixellation / macroblocking on Ch 253-256 in Boston area

Message 3 of 5
(2,514 Views)

I didn't hear about anything similiar from this or other message boards.   Did the problem correct itself?  or is it still there? 

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Bronze Contributor II
Bronze Contributor II
Posts: 206
Registered: ‎11-21-2008

Re: Pixellation / macroblocking on Ch 253-256 in Boston area

Message 4 of 5
(2,502 Views)

I have a problem very similar.  I have 2 channels, where the signal is too weak.  All the others are fine  (100% on my TivoHD, these 2 are 47-54% quality).

 

I was advised to change my cable wire as a kink in it can affect specific frequencies and cause small dropouts at specific frequencies.  I bought a 50 ft wire and connected it directly, sure enough, the problem went away.  So the cable in my wall was bad.  I pulled a new one throughat the baseboard and works fine.

 

Got the first part of the wall one out and sure enough a staple had gone through the ground.

 

So, it could very well be cable...Pixellization is usually caused in a Tivo by a weak signal .  The fact it is 4 channels together is a pretty good sign of a dropout.

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Contributor
Contributor
Posts: 3
Registered: ‎05-19-2010

Re: Pixellation / macroblocking on Ch 253-256 in Boston area

Message 5 of 5
(2,481 Views)

I had Pixellation on a few channels when I first got my HD Tivo running with Fios. My signal strength on the diagnostics screen was 98 so I knew it wasn't a weak signal. It was in fact too strong of a signal. I added a 10db attenuator to the input cable and my uncorrected RS errors went from ~2500 to 0. Now every channel looks perfect.

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