High Definition TV. Several standards were introduced for HDTV broadcast, with much higher resolution on a special TV screen. HDTV or the like - IDTV or EDTV – is becoming the predominant system in broadcast and home. There are two basic standards of HDTV - analog and digital. The analog system was used mainly in Japan but is being phased out, while the digital system was adopted by the US, Australia and Europe, and later also adapted in Japan. Several broadcast stations already transmit HDTV signals, but the price of the receivers is still quite high, thus limiting the penetration of HDTV to the home market. The chosen display format for HDTV is 16:9 vs. the classic 4:3 aspect ratio.
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