Wikipedia Definition & Overview – High Definition Television
High-definition television (HDTV) provides a resolution that is substantially higher than that of standard-definition television.
Definition of HD Radio – via Wikipedia.
HD Radio, which originally stood for “Hybrid Digital”, is the trademark for iBiquity’s in-band on-channel (IBOC) digital radio technology used by AM and FM radio stations to transmit audio and data via a digital signal in conjunction with their analog signals.
A list of FAQS put out by the Federal Communications Commission that addresses the transition of broadcast stations from analog to digital signals by February 17, 2009.
HD Radio Stations in US
List of HD Radio Stations in US.
Discussion Board for HDTV users and would-be users.
Online magazine with listing of the latest articles on HDTV. Has other nice features such as a discussion Board, Reports and Studies.
NASA | SDO’s Ultra-high Definition View of 2012 Venus Transit
Launched on Feb. 11, 2010, the Solar Dynamics Observatory, or SDO, is the most advanced spacecraft ever designed to study the sun. Cool pictures of Venus transit of sun in 2012.
Show Me the HD Radio!
This is another website that has a lot of information about HD radio.
Video: How Stuff Works
Video provides overview of HDTV and analog television. Also includes articles, in laymen’s terms, on technical specs of HDTV.
Video – YouTube – Pogue’s Posts : HD Radio: Status Report
David Pogue explains HD radio and tests some of the receivers that can broadcast “multicast” channels in HD.
What is HD Radio?
This website contains a wealth of information about HD radio.
What is HDTV?
With High Definition (HDTV) programming becoming more available by the day, it’s important to know the answers to some common questions.
Which HDTV Set or Service?
Consumer portal site that helps compare different manufacturers and service-providers of HDTV.
YouTube – Ultra High Definition Television videos
Ultra High Definition Television is a digital video format proposed by NHK Science & Technology Research Labs.