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DigitalCA -> RE: Hitachi 42-inch HD1080 Plasma HDTV - <s>$1,399.99</s> $776.99 with Free Pickup (11/18/2007 11:45:49 PM)
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So, here's the scoop on 1080p vs. 1080i. It's really neither. ;) This HDTV has 3x HDMI "Simplay HD 1080p Compatible Inputs." As noted on the review in hometheatermag.com (above), this plasma has a 1024x1080 resolution which they refer to as "1080 minus the 'p'." The horizontal resolution is not 1920, but with the 1080 vertical resolution, the set is a 1080p display... but "not all 1,080 lines are illuminated at the same time, as they are in a true progressive display." More from the article: "To fit all 1,080 lines on that 42-inch glass substrate, this display employs the technology formerly known as ALiS (Alternate Lighting of Surfaces), now dubbed HD1080. In a standard plasma design, each row of pixels requires two electrode strips (one at the top and one at the bottom), so every two rows require four strips. HD1080 shares one electrode strip between each pair of rows, so every two rows require three electrode strips. This reduction in the overall number of electrode strips allows for more space to fit 1,080 rows. The trade-off is that the display can't illuminate both rows at the same time, so the plasma alternately lights each row every sixtieth of a second. In other words, at any given sixtieth of a second, you're seeing 540 lines, somewhat akin to a 1080i CRT display." As noted on Amazon.com... "With a unique 1280 x 1080 resolution, the P42H401 has over 1,000 lines of vertical resolution, allowing it to have a line-for-line match of incoming 1080i TV signals. While it is not the full 1080p resolution, it has a better resolution than 720p panels at a similar price. Picture quality is further enhanced, thanks to ClearWindow technology that reduces the visibility of a grid structure and maximizes brightness and clarity." Also see the Hitachi web site at hitachi P42H401 and the wikipedia comparison of 1080i vs 1080p. Regardless of p vs. i, we find tonite that this is a very impressive TV for the money. The set supports 1080i and 1080p, as well as 480i/p and 720p.
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