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JLee25's avatar
JLee25
Icon for Contributor rankContributor
4 years ago
Solved

Clocked Video Input II Overflow

Hi, I am using the CVI II to receive 4K resolution, Quad pixels in C10 GX. Overflow handling was turned off in Platform Designer. When the read back of status register Bit 9 shown overflow. ...
  • Deshi_Intel's avatar
    Deshi_Intel
    4 years ago

    HI,


    Pls see my comment below :


    1. My question is will the resolution changed whenever there's over flow in CVI ?
    • Yes. It's possible that resolution will change when overflow happened as the IP will insert END OF PACKET early to cut off the existing video transfer instead of let it to complete and finish.


    You can read more about underflow and overflow operation in VIP user guide doc chapter 7.7 (page 64)


    In short, I would say that the video transfer can't be trusted anymore if overflow happen as it's hard to tell when the data corruption will happen

    • My recommendation to you is perhaps you can consider to add in "FRAME BUFFER II" IP before the connection to CVI IP to add more buffer to avoid overflow issue


    Thanks.


    Regards,

    dlim


Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
4 years ago

HI,


Pls see my comment below :


  1. My question is will the resolution changed whenever there's over flow in CVI ?
  • Yes. It's possible that resolution will change when overflow happened as the IP will insert END OF PACKET early to cut off the existing video transfer instead of let it to complete and finish.


You can read more about underflow and overflow operation in VIP user guide doc chapter 7.7 (page 64)


In short, I would say that the video transfer can't be trusted anymore if overflow happen as it's hard to tell when the data corruption will happen

  • My recommendation to you is perhaps you can consider to add in "FRAME BUFFER II" IP before the connection to CVI IP to add more buffer to avoid overflow issue


Thanks.


Regards,

dlim