Anonymous
Anonymous asked in Consumer ElectronicsTVs · 1 month ago

What is Vertical horizontal scanning lines on tv ?

Can you explain it in a short way ?

And thank you

3 Answers

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  • 2 weeks ago

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  • 1 month ago

    Scan lines are a thing of the past,

    because only an analog camera or a CRT generates or uses true scan lines. 

        

    In normal TV terms, there are no vertical scan lines. 

    Scanning produces horizontal lines of video that, cumulatively, 

    result in an image on a screen. 

    Each line is a continuous analog representation of the brightness and colour 

    of a particular part of a scene. 

    There is no way to precisely control what a specific spot on the screen looks like; 

    exactly what appears depends on how well the electron beam is aimed, 

    and it's pretty much hit-and-miss in a CRT, 

    although careful adjustment of the parameters makes it work quite well. 

       

    Modern (digital) TV systems (both cameras and screens) 

    have grids of picture elements (pixels) 

    arranged in columns (vertical) and rows (horizontal). 

    Each pixel is individually sampled or addressed in respect to brightness and colour. 

    This is a significant requirement for modern TVs to have extremely high resolution. 

         

  • Lance
    Lv 7
    1 month ago

    Horizontal lines are rows of Pixels or other individual light sources that go across the screen in a row...In a HDTV the number of individual pixels or light sources in one line was topically 1920 pixels or light sources across per line..The vertical count refers to the number of lines of pixels that exist from the top to bottom of the screen typically in a HDTV the number of rows was 1080 lines of pixels hence 1080P was the designation. Oh course in a UHDTV those numbers increase exponentially but the principle is still the same....

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