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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RIVA128 датащи(PDF) 38 Page - STMicroelectronics |
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RIVA128 датащи(HTML) 38 Page - STMicroelectronics |
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38 / 77 page  128-BIT 3D MULTIMEDIA ACCELERATOR RIVA 128 38/77 Figure 36. Displaying 2 fields with 1:1 ratio The RIVA 128 video overlay handles interlaced vid- eo by displaying every field, at the original frame rate of the video (50Hz for PAL and 60Hz for NTSC). The video scaling logic upscales , in the ver- tical direction , the luma components in each field and linearly interpolates successive lines to pro- duce the missing lines of each field. This interpolat- ed scale is applied such that the full frame size of each field is stretched to the desired height. The video scaler offsets the bottom field image by half a source image line to ensure that both frames when played back align vertically. The vertical filtering results in a smooth high quality video playback. Also by displaying both fields one af- ter another, any motion artifacts often found in dein- terlaced video output are removed, because the pix- els in each field are displayed in the order in which the original source was captured. Line 10 Interpolated line (Line 10 & 12) Line 12 Line 11 Line 13 Interpolated line (Line 11 & 13) Frame 1 (Top field) Frame 2 (Bottom field) |
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