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Thread Starter 
http://lurkertech.com/lg/video-systems/ this explain a lot of why we get so many bad image quality.basicly from the beginning of digital image,the guy who created the the square pixel and the non-square pixel assumed everybody would understand their meanning and calculation.we re 2012 and so far from mpeg 1 to today,most i am sure never noticed this information .but and this is crucial:is THE REASON WHY IMAGE LOOK Bad.