Derrick
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Digital TV (DTV) is an entirely new television system that will ultimately replace the existing analog system. The term "DTV" refers to a broadcast system for transmitting, receiving, and displaying digital images. DTV stations broadcast pictures and audio as digital “packets,” or bursts of data.
There are three digital TV transmission standards in the world today: DVB, ATSC, ISDB
With digital television, broadcasters are able to offer free, over-the-air television with higher resolution and better picture quality than is possible under the current analog mode of TV transmission.
DTV programs can be transmitted either as standard-definition television (SDTV), or high-definition television (HDTV). SDTV programs are broadcast as 480-line interlaced (480i) or progressive-scan (480p) video. HDTV programs are broadcast either in the 1080-line interlaced (1080i) or 720-line progressive (720p) formats, always with a wide screen picture. Both formats have much higher picture quality than normal SDTV.
All three digital television transmitting systems use the same algorithm used in DVDs to encode the image, MPEG-2. These three standards vary mainly in the video format before and after the encoding, and the way the audio is encoded.
Some broadcasters can offer HDTV-television with theater-quality pictures and CD-quality sound.
Source: http://www.xceive.com/global_demo/digital.htm
There are three digital TV transmission standards in the world today: DVB, ATSC, ISDB
With digital television, broadcasters are able to offer free, over-the-air television with higher resolution and better picture quality than is possible under the current analog mode of TV transmission.
DTV programs can be transmitted either as standard-definition television (SDTV), or high-definition television (HDTV). SDTV programs are broadcast as 480-line interlaced (480i) or progressive-scan (480p) video. HDTV programs are broadcast either in the 1080-line interlaced (1080i) or 720-line progressive (720p) formats, always with a wide screen picture. Both formats have much higher picture quality than normal SDTV.
All three digital television transmitting systems use the same algorithm used in DVDs to encode the image, MPEG-2. These three standards vary mainly in the video format before and after the encoding, and the way the audio is encoded.
Some broadcasters can offer HDTV-television with theater-quality pictures and CD-quality sound.
Source: http://www.xceive.com/global_demo/digital.htm
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