- ROI supported during scaling generation
- Only one ROI at Input Frame and one ROI at Output frame per scale
- ROI definitions (for input as well as all output scales) can be changed at every input frame under software control.
- ROI for each scale (for output) can be different among scales (as well as with respect to the input). It is set under software Control.
- The key purpose of ROI is DDR bandwidth reduction. There is additional help by reduction on processing power on DSP and hardware.
- The input ROI is a superset area considering following two scenarios.
- Multiple ROIs in given Input Frame, if there are multiple ROI for input frame
- Input Frame area from Overlapped ROI across scales
Figure 6-150 shows an example of multiple ROIs in the source superset ROI area.
Figure 6-151 illustrates another application of generating output ROIs with different scales from a common source region.
By defining output ROIs, only the data within ROI in the “superset ROI” scaled output image is saved thus reducing the DDR traffic significantly.