Poor quality Video, picture pixelated using apple tv

Hi, I can stream video like bbc iplayer using apple tv2, from my iPhone 3GS and my ipad2. Moving pictures ( video) tends to be very pixelated to fast the image the worse it is . Still photos are good and the sound is perfect.. Wifi is from BT with router hub 3   The picture quality is the same using wifi or Ethernet cable. Is my problem with the hub ? If so can you recommend a router that is comparable with BT and apple tv?

Winston Churchill wrote:
I've just carried out a few tests using iPlayer.
I have a largish house and use a number of wifi base stations to compensate for both the distance and the fact that I often have quite a lot of network traffic.
At first I found the quality of the video very good, but I then switched the networks the devices were using so that instead of using the nearest base station they were using the furthest one away, at which point I got pixelation too.
That's useful info.
Sounds as though Airplay does have rate adaptive video quality in this case?

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