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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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STV3550 Arkusz danych(PDF) 56 Page - STMicroelectronics |
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STV3550 Arkusz danych(HTML) 56 Page - STMicroelectronics |
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56 / 144 page  56/144 STV3550 Output Stage 5 Output Stage Note: Some descriptions in this section are not applicable for LCD applications. 5.1 Color Space Adaptor (CSA) and Interpolator 5.1.1 Main Features ● RGB to YUV Convertion ● Up-sampling by two ● GFX_ACTIVE Programmable Delay 5.1.2 General Description At the output of the Picture Compositor, the video format is 3x10-bit RGB 4:4:4. The video signal is first sent to a Color Space Adaptor that outputs RGB signals. The bit stream is then interpolated in order to double the bit rate. The interpolation function can be used in the event of a double-rate OSD, or mixed mode (OSD and video). 5.1.3 Up-sampling In this sub-block, incoming RGB data are up-converted using the CLK_DAC clock. There are two possible cases: 1 the CLK_PIX and CLK_DAC clock frequency is the same: only the clock domain is changed, 2 or the CLK_DAC clock frequency is twice the CLK_PIX clock frequency: the clock domain is changed and the outputs signals are padded with a zero level every two samples. Figure 40: CSA and Interpolation Diagram CTL (RGB/YCrCb) CLK_DAC CLK_PIX On/Off by 1 or 2 Interpolator Video Matrix RGB to YCrCb Conversion |
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