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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMS320AV7110 датащи(PDF) 41 Page - Texas Instruments |
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TMS320AV7110 датащи(HTML) 41 Page - Texas Instruments |
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41 / 131 page  DSP TMS320AV7110 Revision 3.1 10/08/99 22:18 Page 41 8. OSD & Graphics Acceleration 8.1 OSD • Supports up to eight hardware windows, one of which can be used for a cursor • Displays the nonoverlapped windows simultaneously • Displays overlapped windows obstructively with the highest priority window on top • Provides a hardware window-based cursor with programmable size, shape, color (two colors) and blinking frequency • Provides a programmable background color, which defaults to black • Supports four window formats: • empty window for decimated video • bitmap • YCrCb 4:4:4 graphics component • YCrCb 4:2:2 CCIR 601 component • Supports blending of bitmap, YCrCb 4:4:4, or YCrCb 4:2:2 with motion video and with an empty window • Supports window mode and color mode blending • Provides a programmable, Color Look Up table (CLUT) with 256 entries. • Outputs motion video or mixture with OSD in a programmable, 4:2:2 digital component format • Provides motion video or mixture with OSD to the on-chip NTSC/PAL encoder • Each hardware window has the following attributes: • window position: any even pixel horizontal position on screen; windows with decimated video have to start from an even numbered video line also • window size: from 2 to 720 pixel wide (even values only) and from 1 to 576 lines • window base address • data format: bitmap, YCrCb 4:4:4, YCrCb 4:2:2, and empty • bitmap resolution: 1, 2, 4, and 8 bits per pixel • full or half resolution for bitmap and YCrCb 4:4:4 windows • bitmap color palette base address • blend enable flag • 4 or 16 levels of blending • transparency enable flag for YCrCb 4:4:4 and YCrCb 4:2:2 • output channel control • Provides graphics acceleration capability with bitBLT hardware 8.1.1 Description The OSD module handles OSD data from different OSD windows and blends it with the video. It accepts video from the Video Decoder, reads OSD data from SDRAM, and produces three sets of video output: two go to the on-chip PAL/NTSC Encoder and another set to the digital output that goes off chip. Contents of these three sets of video output can be individually chosen. The OSD module defaults to standby mode, in which it simply sends video from the Video Decoder to all outputs. After being configured and activated by the ARM CPU, the OSD module reads OSD data and mixes it with the video output. The CPU is responsible for turning on and off OSD operations. The BitBlt hardware which is attached to the OSD module provides acceleration for memory block moves and graphics operations. Figure 12 shows the block diagram of the OSD module. The various functions of the OSD are described in the following subsections. |
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