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每一個環節都會影響DTV/HDTV的視訊/影像畫質
Deinterlacer只不過是整個DTV/HDTV視訊/影像處理中的一環, 即使Deinterlacer演算法在好, 假如前一個環節沒處理好, motion detection/motion estimation誤判機會就高, 畫質並不會改善多少; 另外Scaling亦會影響. 總括來說包括 TV Decoder (如果視訊是由Analog TV而來), Demodulation, MPEG Decoder, Deinterlacer, Scaler, (Locast) Contrast Enhancement, Sharpness (Peaking/CTI/LTI without amplying the noise), Noise Reduction, Color Enhancement, Motion-based Franme rate conversion (50Hz/60Hz --> 100Hz/120Hz), Overdriving, RGB LED Backlight Control, ..,等, 還有最後板子的干擾問題.
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7 L+ o% r. A W" H5 u所以較實際的考慮應該是, product target的segments. : ?# x7 {8 J6 z# N/ [. C- |. }
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至於是否要用motion-based deinterlacer, 其實若所獲得的motion vectors是不可靠的, 那麼畫質會比Motion Adaptive還慘, 所以也許可採Hybrid. |
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