Uh oh,... HDTV / 360 question.

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  • Ice Cream Truck
    Money Makin' Sonny
    • Nov 2003
    • 2200

    #16
    Re: Uh oh,... HDTV / 360 question.

    Originally posted by NoSkillz50
    is 720p better than 1080i or something?
    Originally posted by Someone who told me what it was
    720 progressive is technically better than 1080 interlaced. With 1080 interlaced HD, your actual quality is down to 540 lines because of the interlace technology it uses.

    A 720p signal is made up of 720 horizontal lines. Each frame is displayed in its entirety on-screen for 1/30th of a second. This is know as progressive scan. The quality is like watching 30 photographic images a second on TV. A 1080i signal comprises 1080 horizontal lines but all the lines are not displayed on-screen simultaneously. Instead, they are interlaced, ie every other lines is displayed for 1/60th of a second and then the alternate lines are displayed for 1/60th of a second. So, the frame rate is still 30 frames per second, but each frame is split into two fields, which your brain then puts together subconsciously.

    Most of the time interlacing works fine, but for fast moving images, such as sports, action-movies and fast-paced gaming it can cause problems which manifest themselves as a 'stepping' effect on-screen. Progressive scan signals don't have this problem and so are better suited to above mentioned.

    In other words, 720p in most cases knocks 1080i off.
    So.. Yeah.
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    • elTodd
      Little Big Puig
      • Feb 2004
      • 1333

      #17
      Re: Uh oh,... HDTV / 360 question.

      Is HD supposed to have the bars on the top and bottom like widescreen? I didn't know if it was my tv or what. Any help would be appreciated.

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      • dbdynsty25
        Rookie
        • Nov 2002
        • 370

        #18
        Re: Uh oh,... HDTV / 360 question.

        Yeah, there can be bars...it just depends on the aspect ratio of the signal going to the TV. A lot of times, even widescreen movies will have bars on the top and bottom.

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