Like others have previously commented I have seen occasional picture break up and pixellation issues. I too initially thought it was maybe an RF signal quality issue, but given I have multiple DTV devices in the house fed from the same distribution system was mystified as to why. Checking the signal strength for each mux on this box they are between 66 and 82, all with 100% quality. The COFDM signal is generally pretty robust so unless there was interference either external or internal to the box it ought not to be the culprit.
What I have started to notice though and verified when it happened last night is that I was watching the recording effectively in "live pause mode". That is the programme was being recorded whilst at the same time I was watching it. I had pressed pause for a few minutes and then continued watching. Several times during the programme there were brief bursts of pixellation. When I watched the recording back again today at the points where the errors were, the recording appeared fine. That seems to rule out signal issues as being the cause in my case.
It makes me wonder therefore if there could be hard disk/filesystem issues which mean that occasionally the playback buffers cannot access data quick enough. Last night I was recording 2 HD streams and playing back 1 HD stream. I would hope that if I'm recording a channel, watch it and then press pause that it uses the stream its already recording rather than starting a new "Pause Buffer". Otherwise that could be 3 HD streams to record.
Just wonder if this could be the same scenario where others have observed picture break up. Don't know whether it is then related to number of record streams, time delay etc.
