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Hdtv: Like Looking Out An Open Window
Have you ever watched a movie on a regular TV set, and then watched the same movie on an HDTV? If so, you would have noticed a huge difference! On the HDTV viewing, you see and notice things you've never seen before, even if you've seen the same movie ...
Installing a Home Theater
Thinking about installing a home theater system? You’re not alone. Home theater is one of the fastest growing areas areas in home entertainment and the advent of DVD recorders means your set-up can now be entirely digital, without an inch of video tape in ...
Satellite vs Cable
Satellite versus Cable By Gary DavisDish Network Satellite TV.ws(Webmasters - you may freely use this article in your newsletter or website, providingyou re-print the article exactly as it appears, including the Byline, Bio and a link backto Dish Network ...
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You may know that 1080i refers to 1080 lines of vertical resolution interlaced. This means that instead of 30 frames a second, the TV displays 60 fields per second, where each field contains alternate lines of the picture. Because the fields are refreshed so quickly, your brain interprets the signal as 30 full frames per second. 720p means 720 vertical lines of progressive scan video where every frame of the signal is displayed in its entirety, giving a higher-quality, film-like appearance to the picture. Most HDTVs or HDTV-ready TVs support either 720p or both 1080i and 720p, very few support 1080p HDTV. Part of the reason for this is that very few broadcasters want to broadcast 1080p signals. The reason for that is that 1080p requires significantly higher bandwidth than either 1080i or 720p. And for broadcasters, bandwidth is a precious commodity. Using up more bandwidth for one
signal means that there is less room for other channels. So in many cases, opting for a 1080p signal would mean dropping or degrading other channels. Is 1080p HDTV important? Well, yes and no. Not all video footage benefits greatly from progressive scan. Sports broadcasts and action movies look better at 720p than 1080i because there is lots of fast movement and the interlacing in 1080i is sometimes noticeable, reducing the quality of the picture. Movies and TV shows where there is not a great deal of fast action look better at 1080i than 720p because the higher resolution has a greater impact on quality than the progressive scan, which has little effect where there is only a small difference in the image between frames. So, while 1080p HDTV is the best of both worlds, the cost in terms of bandwidth, is very high compared to the benefit for most people most of the time.
About the Author
Kenny Hemphill is the editor and publisher of The HDTV Tuner - a guide to the kit, the technology and the programming on HDTV.
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Should I upgrade my CRT HDTV? (Morrison's Mailbag)CNET (blog)All but the most obscure channels are now available in 16x9 HDTV. Does your cable provider not offer them? If they do, and you're not paying for the HD channels from your cable/satellite provider, you should be. That's a waste of your HDTV.and more » |
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HDTV Almanac - Shed Some Light on Sports BlackoutsHDTV Magazineby Alfred Poor on February 10, 2012 Last Thanksgiving weekend, the NFL Cleveland Browns travelled in-state to play the Cincinnati Bengals. The game was not a sell-out, and under FCC rules, the Bengals exercised their option to blackout the over-the-air ...and more » |
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