On a high def television whats the difference between a 1080i picture and a720i picture aren't both high def ?

Answer 1

Like IdiotWind, going to assume you meant 720p


1080i and 720p are the two High Definition Display / Broadcast standards in America.

The “p” in 720p indicates progressive. Progressive images are “painted” vertically consecutively line 1, and then line 2, followed by line 3, etc. Computer Monitors are always progressive allowing users to sit very close with minimal eye strain.

The “i” in 1080i indicates interlaced. Interlaced images are drawn vertically line 1, and then line 3 to the bottom of the screen, followed by a second sweep filling in line 2, followed by line 4, etc. This is done quick enough to fool the eye / brain into seeing a coherent image. American television (standard definition) has been interlaced since 1941.

Despite what a salesman tells you - it’s doubtful anyone can tell the difference between the two high definition standards 1080i and 720p. The standards apply to both display devises (televisions) and broadcast networks.

To further demonstrate the equality of the two standards only the ABC networks (including ESPN) broadcasts in 720p. All others broadcast in 1080i. A 1080i television seamlessly converts ABC channels into 1080i. A 720p television effortlessly coverts NBC, and HBO into 720p.

Answer 2

Yes, but a 1080i has 1080 lines of resolution instead of just 720. This makes it a HIGHER, high resolution TV. It's similar in a way to how pixels work for a digital camera. The more pixels, the sharper and more realistic the image. The more lines of resolution that your TV has, the sharper and more realistic the image. Good Luck!

Answer 3

720i? never heard of that, maybe you mean 720p? In either case, the signal is pretty much converted to 1080i once the signal gets into the line processing circuits. If it's already 1080i, it don't get converted, thats all.

Answer 4

1080i (interlaced) is like knitting a blouse and 1080p (progressive test) is like making a blouse with somewhat of fabric. the numbers of 720 &1080 are the variety of lines (or threads in an attempt to communicate) that would make up the blouse (image)!