The following sections detail the performance characteristics of the Sensor Demosaic core.
Maximum Frequencies
The following are typical clock frequencies for the target devices:
- AMD UltraScale+™ devices with speed grade of -1 or higher: 300 MHz
- AMD Virtex™ 7 and AMD Virtex™ UltraScale™ devices with speed grade of -2 or higher: 300 MHz
- AMD Kintex™ 7 and AMD Kintex™ UltraScale™ devices with speed grade of -2 or higher: 300 MHz
- AMD Artix™ 7 devices with speed grade of -2 or higher: 150 MHz
The maximum achievable clock frequency can vary. The maximum achievable clock frequency and all resource counts can be affected by other tool options, additional logic in the device, using a different version of AMD tools, and other factors.
Throughput
The Sensor Demosaic IP supports bi-directional data
throttling between its AXI4-Stream slave and master interfaces. If the
slave side data source is not providing valid data samples (s_axis_video_tvalid is not asserted), the core cannot produce valid output
samples after its internal buffers are depleted. Similarly, if the master side interface is
not ready to accept valid data samples (m_axis_video_tready
is not asserted) the core cannot accept valid input samples after its buffers become
full.
If the master interface is able to provide valid samples (s_axis_video_tvalid is High) and the slave interface is ready to
accept valid samples (m_axis_video_tready is High),
typically the core can process and produce one, two, four, or eight pixels specified by
Samples Per Clock in the Vivado Integrated Design Environment (IDE) per
ap_clk cycle.
However, at the end of each scan line and frame the core flushes internal pipelines for
several clock cycles, during which the s_axis_video_tready is deasserted
signaling that the core is not ready to process samples.
When the Sensor Demosaic IP is processing timed streaming video (which is typical for most video sources), the flushing periods coincide with the blanking periods and therefore do not reduce the throughput of the system.
When operating on a streaming video source (that is, not frame buffered data), the Sensor Demosaic must operate minimally at the burst data rate. For example, 148.5 MHz for a 1080p60 video source for a one sample per clock configuration of the IP. For a 4K 60 fps video source, the core must operate at 297 MHz for a two sample per clock configuration, or 148.5 MHz for a four sample per clock configuration on slower devices such as AMD Artix™ 7.
Resource Utilization
For full details about performance and resource utilization, visit the Sensor Demosaic Performance and Resource Utilization web page.