What is the difference between HD and normal tv transmision?

Question

What is the difference between HD and normal tv transmision?

Answer 1

flummoxed

Answer 2

"Normal" TV can mean a number of things. Analog TV is what we've all been watching since about 1947. Standard Definition digital TV (SD) is 480i -- 480 lines of vertical resolution interlaced. Interlaced means that each frame only transmits every other line.

High Definition (HD) digital TV is anything more than 480i. SD DVD is 480p -- 480 lines of vertical resolution, progressive scan. Progressive scan means that each frame contains all 480 lines. This takes twice as much data as 480i.

Most HD TV is now 720p. This has 720 lines of vertical resolution and every frame contains all 720 lines. Fairly common is 1080i which requires the same data rate as 720p (think about it). The highest resolution HD now available is 1080p.

Answer 3

Well SD is 480i Then when you get into HD you will start out with 720i and then some will even get 1080i.  

Some channels are only up to 720i and a few are up to 1080i.  

Great Question

Answer 4

HD is high definition, more like looking at a good picture;  regular TV still has lines in the picture.

Answer 5

HD mean high definition which means a better picture most of the tv's coming out have that and they are better but do use more energy than normal tv's. If you have the money for one then go for it. They are nicer and better to look at.

Answer 6

quite a diferance your going from a 480 i (interlaced) to a 1080p progressive doubling lines wicth gives you a wonderfull experance ...... try this type of lcd flat screen with blue ray and you have it all techonlogy i love it hope this helps.