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Progressive scan Video

The ability to adjust to the frequency at which the video is received from the display device can help eliminate various artifacts, and ideal when used in the high-performance Front Projectors with large screens.  Although most consumer televisions will still employ 60Hz as the frequency at which the display will be redrawn (60 cycles per second), the Front Projector can receive these frequencies ranging from 60-150Hz (known as refresh rate in computing).  

Illustration of Interlaced display at 60Hz

Illustration of Progressive Scan display at 60Hz


The benefits of scanning progressively are immediately visible to the eye above during the display process. The original frame is kept pristine, and scaled in it's with all information intact.  The lack of flickering offers more stable images and legible text.  The interlacing of video creates scan lines, black lines which alternate between the video fields, which is very visible on a big screen.  While line doubling can fill in these gaps, it is still imprecise since it simply duplicates the information, creating motion artifacts in moving images.   There is definitely a visible difference between progressive scan images created by line doubling and one created by weaving together the interlaced film fields to a full frame.  

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RKR  Video Home Theater PC (HTPC)
What is Progressive Scan?
The Big Picture
Display Technologies and the Home Theater PC
RKR HTPC Features
RKR Video information


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