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Topic: SDTV

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EDTV

DVB

Digital television

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Broadcast television system

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	Articles - High-definition television (Site not responding. Last check: 2007-10-13)
		HDTV has at least twice the resolution of SDTV, thus allowing much more detail to be shown compared to analog television or regular DVDs.
		In addition, the technical standards for broadcasting HDTV are also able to handle 16:9 aspect ratio pictures without using letterboxing, thus further increasing the effective resolution for such content.
		Another reason for HD-MAC's failure was that it was not realistic to use 36 MHz for a high definition signal in terrestrial broadcasting (SDTV uses 6, 7 (VHF), or 8 MHz (UHF)).
	www.ezorange.com /articles/HDTV (3261 words)

	Third Cinema -- Britannica Student Encyclopedia
		The third item to be selected in image analysis is the shape of the picture.
		For SDTV, as is shown in the, the universal picture is a rectangle that is one-third wider than it is high.
		This 4:3 ratio (or aspect ratio) was originally chosen in the 1950s to match the dimensions of standard 35-mm motion-picture film (prior to the advent of wide-screen cinema) in the...
	www.britannica.com /ebi/article-9313824 (954 words)

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