| How HDTV Differs from Analog TV
How HDTV Differs from Analog TV
HDTV has higher resolution meaning
sharper, clearer pictures: The image on a television is composed of small picture elements called pixels. The pixels in HDTV are closely packed together to provide a highly detailed picture. Current analog TVs display an image of 200,000 pixels. The minimum DTV signal shows 300,000 pixels and hits a maximum of two million for HDTV, the best of the 18 ATSC formats.
HDTV has a widescreen format:
In addition to providing improved picture quality with more visible detail, HDTV is transmitted in a widescreen display commonly referred to as a 16:9 format, meaning that the picture is 16 units wide by 9 units high. A conventional analog display is 4 units wide by 3 units high, or 4:3. Thus the 16:9 display provides a wider image area that more closely matches the movie theater experience.
HDTV has better sound:
Many HDTV programs also contain six-channel (5.1) Dolby Digital surround sound to provide an immersive audio experience to complement the improved picture quality on HDTV. This is particularly beneficial within a home theater system.
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