18.104.22.168. 12G-SDI with Clocked Video Input II
The 12G-SDI option uses the two-sample interleave (2SI) pattern, which transmits two lines simultaneously, The simultaneous transmission of two lines means that the active width received by the CVI II IP core in between two sets of horizontal SYNC is two times the actual width. The CVI II IP core applies the appropriate scaling before reporting to the Active Sample Count status register and the Avalon-ST video control packet. The 2SI pattern also requires that the clocked video input to be remapped to raster scan order for processing in a VIP pipeline. The CVI II IP core performs the remapping.
When a 3G-SDI packet is carried over a 12G-SDI link, the CVI II IP core captures 3 null pixels for every active pixel. The SDI Resampler discards these null pixels to reestablish the 3G-SDI sample order in the Avalon-ST video frame, as shown in the figure below.
|Parameters||Support 6G and 12G-SDI Off||Support 6G and 12G-SDI On|
|SDI Resampler||Not available||Present|
|Pixels in parallel||1||4|
|Standard width range||1–16||3|
|Multi-rate Mode||3G-SDI, HD-SDI, SD-SDI||12G-SDI, 6G-SDI, 3G-SDI, HD-SDI, SD-SDI|
|Square Division Quad format||Not supported||Not supported|
|2 Sample-interleave (2SI) format||Not supported||Supported|
|12G-SDI with 8 streams interleaved||Not supported||Supported|
|12G-SDI with 16 streams interleaved||Not supported||Not supported|
|6G-SDI with 4 streams interleaved||Not supported||Not supported|
|6G-SDI with 8 streams interleaved||Not supported||Supported|
|3G-SDI Level A||Supported||Supported|
|3G-SDI Level B||Not supported||Not supported|
|4:4:4||Not supported||Not supported|
|4:2:0||Not supported||Not supported|
|Minimum active frame size||32x32||
|Active width supported||Modulo 1||
|Active height supported||Modulo 1||Modulo 1|
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