HDTV tuner reviews

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HDTV stands for high-definition television. HDTV is available in many, but not all areas.*Certain services are available separately or as a part of other levels of service, it has more than six times the sharpness and clarity of analog TV.

HDTV Information:

DTV can be used to carry more channels in the same amount of bandwidth than analog TV (6 MHz or 7 MHz in Europe) and to receive high-definition programming.

The digital signal eliminates common analog broadcasting artifacts such as "ghosting", "snow", and static noises in audio. However, when the signal is transmitted at a too low data rate DTV replaces these artifacts with new MPEG compression artifacts, such as "blocking", and may fail to work entirely in situations where analog television would have produced an impaired but watchable picture. Depending on the sophistication and level of the error correction defined by the technical standard that the broadcaster complies with, DTV may either work perfectly or not work at all.

Other codecs are in contention such as H.264/AVC (MPEG-4 Part 10) and the VP6/VP7 codecs from On2 Technologies.

H.264 as a standard has already been selected and adopted by the biggest broadcasters in the U.S. (DirecTV, DISH Network) and Europe (BSkyB, Premiere, Canal+, TPS, ...). H.264 was chosen for several reasons: The standard was validated as an open standard at least a year before VC-1 was seriously considered as a potential open standard, and, then, there is a lot of uncertainty on the levies Microsoft may want to impose once the algorithm is adopted.

So far, only a handful of very minor broadcasters are seriously considering VC-1. It has been thought for a while that VC-1 was better adapted for the IPTV world than H.264, but press announcements have also already been made by some of the largest STB manufacturers like Amino, Pace, Kreatel demonstrating solutions based on H.264 standards.

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