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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) 36 Page - STMicroelectronics |
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RIVA128 датащи(HTML) 36 Page - STMicroelectronics |
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36 / 77 page  128-BIT 3D MULTIMEDIA ACCELERATOR RIVA 128 36/77 7 VIDEO PLAYBACK ARCHITECTURE The RIVA 128 video playback architecture is de- signed to allow playback of CCIR PAL or NTSC video formats with the highest quality while requir- ing the smallest video surface. The implementa- tion is optimized around the Windows 95 Direct Video and ActiveX APIs, and supports the follow- ing features: • Accepts interlaced video fields: - This allows the off-screen video surface to consume less memory since only one field (half of each frame) is stored. Double buffer- ing between fields is done in hardware with ‘temporal averaging’ being applied based on intraframing. • Linestore: - To support high quality video playback the RIVA 128 memory controller and video over- lay engine supports horizontal and vertical interpolation using a 3x2 multitap interpolat- ing filter with image sharpening. • YUV to RGB conversion: - YUV 4:2:2 format to 24-bit RGB true-color - Chrominance optimization/user control • Color key video composition Figure 35. Video scaler pipeline YUV Vertical Interpolation Filter (Smooth/Sharpen) Color Space Conversion to 24-bit RGB Horizontal Interpolation 24-bit RGB Video output Video windowing, merge with graphics pixel pipeline Linestore |
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