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HOMEDigital Cable>  HD-TV


HDTV is the best form of digital television and produces images far better than ever before seen in a “home setting.”  Basically HDTV provides the viewer a “movie theater experience.”  Standard Definition (or SDTV) also represents a dramatic improvement allowing stations to broadcast multiple programs within the same bandwidth as an HDTV signal. 

 HD TV vs. Standard Television   




Refresh Rate

Aspect Ratio


Lines Rate


750 total
720 active

15.75 kHz (60i)

480 x 640

24p, 30p, 60p or 60i fps



1125 total
1080 active

31.5 kHz (60p)

480 x 704

24p, 30p, 60p or 60i fps

4:3 or 16:9

8 (4x2)


525 total
480 active

45 kHz

720 x 1080

24p, 30p, 60p



525 total
480 active

33.75 kHz

1080 x 1920

24p, 30p, 60i



 Definition of Aspect Ratio It is the ratio of width to height of your TV monitor.

The conventional “nearly square” TV we are accustomed to today has a dimension ratio of 4:3.  HDTV broadcasts are delivered in the new 16:9 wide-screen format giving you the same dimension ratio as movie theaters.  This wide-view provides better DVD viewing because it displays the motion picture in its originally intended "aspect-ratio" format.  

     * All HDTV and some SDTV signals will in the future be transmitted with an aspect ratio of 16:9.