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by Dubs_17 on December 15th, 2006

Dubs_17

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Will I notice a large difference in picture quality between a plasma with 13-bit color processing (Samsung HP-S5053) and one with 16-bit processing (Hitachi 55HDT79)? Does the Samsung support 1080i? Some sites spec 720p; some spec 720p AND 1080i??
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  • by RedJohn on December 22nd, 2006

    RedJohn

    There is a substantial difference, technically, between 13-bit and 16-bit colour rendering. How much of this difference you will be able to see will depend on the type of program material you watch and your perceptual capabilities. If you enjoy watching films that are photographed with more than the usual care, you should choose the display with the best ability to render colours - the Hitachi, in this case.

    The Advanced Television Systems Committee (ATSC, http://www.atsc.org/) defines several HD video formats, including 480i, 480p, 720p, 1080i, and 1080p. HDTV programming is broadcast in either the 720p or 1080i format. The Hitachi website states that the 55HDT79 supports four HD formats: 480i, 480p, 720p, and 1080i. You have to download the user manual for the Samsung HP-S5053 to get similar details about their product - an inconvenience for the consumer – to find that the Samsung also supports the same four HD formats.

    Note that there is a difference between the native resolution of a display and the video formats that it can display. Both the Hitachi and the Samsung have 1366x768 displays, so both can display 720p images without rescaling. However, both need to downconvert and deinterlace 1080i signals to 720p to display them. How well the conversion algorithms work is dependant on the chipsets used in the televisions, the skills of the engineers who designed them, and the cost of the television. By and large, you get what you pay for.

    Footnotes:
    I recently purchased a Hitachi 42HDX99 because of its ability to portray colour and detail. The extra cost of the HDX version is well worth the additional investment, whether you purchase a 42- or 55-inch display.

    A common rule-of-thumb used to determine the screen size for general viewing is to measure the distance between the viewer and the television, and then divide the result by three. For a 50-inch television, you should be seated about 150 inches or 12.5 feet from the screen. For a 42-inch television, you should be seated about 126 inches or 10.5 feet from the display.

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