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U-verse TV is delivered via IPTV from the headend to the consumer's receiver, required for each TV. Transmissions use digital H.264 (MPEG-4 AVC) encoding, compared to the existing deployments of MPEG-2 codec and the discontinued analog cable TV system. The receiver box does not have a RF tuner, but is an IP multicast client which requests the channel or "stream" desired. U-Verse TV supports up to 4 active streams at once. The system uses individual unicasts for video on demand, central time shifting, start-over services and other programs.
HD TV streams run using 5.7Mbps of bandwidth whereas SD TV streams run using about 2Mbps of bandwidth.
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