I have a video string of 720*480@60Hz 24bit/pixel input from the mini HDMI port, I’d like to use the LightCrafter GUI settings to speed up the frame rate to 60*24 (1440fps), displaying 1-bit monochrome frame at a time, unfortunately I have not succeed doing so.
Is it because of my inappropriate video resolution? If not, how can I do it?
Hi Hai Jiao,
For 1-bit monochrome frame rate or in general if you want to use HDMI port for realtime pattern sequence always ensure that the video resolution matches to 608 * 684 resolution.
Ensure the Video Setting is set to 608 x 684. With this setting DM365 sures DLPC300 is NOT in scaling mode.
Thank you very much for the quick response, I am currently developing an embedded system, unfortunately I can’t supply the resolution needed by Lightcrafter. Do you think there is another way to display 720*480 pattern sequence? If I am correct, if I can properly display ordinary 720*480 resolution video, it is only a matter of bypassing the algorithm inside the FPGA for pattern sequence, is there anything I can do to make it work?
Unfortunately not. It is very important that in pattern sequence mode the entire data path operates in 1:1 pixel mode. The physical DMD resolution is 608 * 684 so there is no way to display entire 720*480 content in pattern sequence.
FPGA is functionality is just to MUX video, it takes input from DM365 and external HDMI connector then passes it to DLPC300. Inside the DLPC300 where scaling and other image processing algorithm run.
You can experiment converting video resolution from 720 * 480 to 608 * 864 format.
Well, little bit disappointed, Thanks anyway!
I would like to stream 1-bit patterns from HDMI too.
So if the image format of my input isn't 604*684, the FPGA automatically scales it to fit with the native resolution of DMD. What is the approximate delay due to image scaling? 100 us? 100 ms? Is it constant?
Is it possible to disable the scaling so that my image would basically be cropped? The point is that I want to avoid interpolations.
On the other hand, I'm not familiar with HDMI and GPUs. Is it easy to change HDMI format to match with non-standard formats?
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