King77
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Today's HDTVs can display beautiful, 1,920-by-1,080-pixel video, but the actual quality of what you're viewing depends on the source material. A lot of the time, you're not seeing exactly 1080p. In fact, most of the Dth providers in India provide 1080i feed.
In 1080i ( i ) = interlaced
In 1080p ( p ) = progressive scan
In 1080p format, 1,920-by-1,080-pixel high-definition movies are progressively drawn line after line, so they're not interlaced. On paper, that may not seem like a huge deal. But in the real world, what you end up seeing looks sharper and more defined than 1080i, particularly during scenes with a lot of fast motion
you can see one of the examples of interlaced video from Sony Espn
major flaw of 1080i that you can't see fast moving objects easily
In 1080i ( i ) = interlaced
In 1080p ( p ) = progressive scan
1080i video plays back at 60 frames per second, but that's a bit deceptive, because it's actually broadcast at 30 frames per second. The TV then displays those frames twice, in a way—the first pass is 1,920-by-540 for the even scan line field, and the second pass is 1,920-by-540 for the odd scan line field. The process by which this occurs is called interlacing. It contributes to a sense of motion and reduces perceived flicker.
In 1080p format, 1,920-by-1,080-pixel high-definition movies are progressively drawn line after line, so they're not interlaced. On paper, that may not seem like a huge deal. But in the real world, what you end up seeing looks sharper and more defined than 1080i, particularly during scenes with a lot of fast motion
Sometimes 1080p is termed "full HD" or "true HD," to distinguish it from 1080i or 720p video. Blu-ray discs contain 1080p video at 24 frames per second, and then, using a method known as 3:2 pulldown, display it at 30 frames per second on screen.
Why Dth & Cable companies use 1080i ?
Companies deliver a 1080i picture, in order to use up less bandwidth. The result is technically HD, and still looks better than standard-definition cable, but it's not as good as it could be. and mean smeared details or pixelated color gradations in certain scenes.
Why Dth & Cable companies use 1080i ?
Companies deliver a 1080i picture, in order to use up less bandwidth. The result is technically HD, and still looks better than standard-definition cable, but it's not as good as it could be. and mean smeared details or pixelated color gradations in certain scenes.
you can see one of the examples of interlaced video from Sony Espn
major flaw of 1080i that you can't see fast moving objects easily
