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Christmas Gifts -> HDTV
Christmas gifts - Pepsi Men's NASCAR Racing Cap, Black
Useful: HDTV: What's the difference between 720p and 1080i HD broadcasts?
The short answer is that they both look great, and most people have a hard time telling the difference. Here's the medium-size answer: the numbers 720 and 1080 refer to horizontal pixel counts, while the letters p and i refer to the picture-scanning method--either progressive or interlaced. Proponents of 1080i HD will tell you that they offer the most lines of resolution, which is true. However, 1080i images are interlaced, meaning that a tube TV draws the picture in two passes: once for the odd-numbered lines, and again for the even-numbered lines. For 720p, or progressive, broadcasts, tube TVs draw each frame in a single pass, making for a smoother picture (nontube televisions display everything as progressive scan). While most viewers probably won't be able to tell the difference, videophiles tend to prefer the smoother images of 720p. Even higher-bandwidth 1080p broadcasts could offer the best of both worlds, but they're not going to be available anytime soon. |
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