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HDTV stands for high-definition television. HDTV is just one part of the DTV transition, it has been produced, with much more to follow.

HDTV Information:

The fact that a product bears the label "HD ready" does not necessarily mean that it can display the full picture resolution possible from a HD source. Most HD-ready sets do not have enough pixels (1920x1080 or 1280x720) to give true pixel-for-pixel representation without interpolation of higher HD resolutions.

Theoretically, even pixel-for-pixel is not enough, as sampling theory shows that proper image reconstruction requires more pixels in the display than were used for the original picture. This is why SDTV video sources (especially DVD) look much better on a HDTV than on the best SDTV (this is a consequence of basic sampling theory, and not a matter of image enhancement).

The term HD compatible is also being used in the UK to indicate that a display device has HDMI capability but with lower than HD-ready resolution.

IPTV

Internet technologies are finally starting to be adapted for use with DTV deployments, meaning a single broadband Internet connection will eventually service one's home providing one with Triple Play (voice over IP, Internet access, and digital television).

IPTV is a big step forward when combined with the latest advancements in picture quality such as high-definition (HDTV) and new AVC (Advanced Video Compression) standards such as MPEG4 H.264 or WM9 (very efficient emerging picture compression standards).

Not only are set-top boxes becoming smarter (they are essentially cut down PC's in their own right) they will interact with other devices such as PDA's, mobile phones, and the Internet to provide a truly flexible solution allowing local information to be tailored to specific regions (e.g. weather and news from your local area).