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This is just a guess. How deep is the FIFO on your CVI block? Because you are upscaling you are going to put backpressure from the scaler to the CVI. It may be that this backpressure is causing an overflow in your CVI.
Jake
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Hi, Jake, thanks for your reply!
Yes, your guess is right, when I change the input resolution 640x480@60 to 640x480@30, which reduced the backpressure on CVI, it worked well, but it seems hard to set a appropriate size for the FIFO of CVI.
In the user guide, you know, it mentioned that the latency of scaler is N(Tap)-1 lines, in my understanding, does it mean that a overflow of CVI won't happen as long as the FIFO depth of CVI is equal to or more than (N-1)lines.
Again thanks for reply!
Honored Contributor
