This can be very annoying while you're trying to watch a program. They can vary from every once and awhile to being every few seconds during a show. Thanks to BattleScott here is a sample: http://www.dbstalk.com/attachment.php?attachmentid=18074&d=1239640597 And to Ken S : http://www.youtube.com/watch?v=JwXDUNv7wQE What is happening is the DirecTV MPEG-4 encoder is "dumping" and having to reset as it is transcoding the MPEG-2 to MPEG-4 at the uplink center. This seems to happen to HD locals more than national channels. If your locals are doing this, you can tune into the OTA feed and sometimes see it there too, but other times not see it. This doesn't mean the station isn't the cause/source. Their feed may have corrupted bits that don't affect the playback of the MPEG-2 stream, but these cause the MPEG-4 encoder to reset. Sometimes it is the DirecTV encoder, which I've seen when several local stations are all doing this at the same time. So this is the "what and where" but what can you do about it? If it's with a local station, I found the best [quickest] thing to do is to call/email the station engineering about it. If they're responsive [some are and some haven't been], they will look into their end and work with the Network Broadcast Center at DirecTV. If they're not responsive or this is with a national channel, then you will need to contact DirecTV, but you can't get directly to the broadcast center. This means the CSR can "log a report" which will get the the center, but these don't seem to be acted on until there are many reports [which I really can't blame them with all the channels they're working with]. If they "can see it at the time" then they'll work on it, but since this problem comes and goes, they can monitor the feed and not see it [since it isn't happening at the time]. The next step I took was to email email@example.com and explain the problem I was having and the steps I'd done. I would recommend not emailing first, but calling and having it get logged a few times. Let their system try to resolve it, before escalating it to this level. It took me a few email replies and phone calls, but I did have someone interested in resolving "my problem". One of the first steps was to have a service call to make sure there wasn't anything in my system that might be causing it. There wasn't and I knew it, but they needed to start somewhere and know it wasn't on my end. They asked me to have some recordings so I could show them exactly what it was when the came. They looked all over my system, watched the recordings and then called the broadcast center. The engineer had them hand the phone to me and explained what the problem was. "The problem" wasn't fixed overnight, but my locals have been much improved and between a few emails to station and the broadcast center engineers, have seen the improvements from both the stations and at the DirecTV uplink.