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RD-FD's avatar
RD-FD
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2 years ago
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SDI output transmitter with 2 standards

Hello,

We are working in a project based on Cyclone V family which include SDI II intel FPGA IP as SDI transmitter. We are generating the IP core as "Transmitter" with video standard "3G-SDI".

Our aim is to be able to work with 3G-HDI and HD-SDI switching between them on runtime (i.e. changing tx_std value). During our test we got successfull result with 3G-SDI, but when we tried HD-SDI we didn't had SDI output at all.

We would like to know if it is possible to work with both standards using only one IP core with the configuration explained before. Is there any consideration we should take into account and we may be missing? Instead of our proposed solution, would be better to use two SDI IPs one configured as HD-SDI transmitter and a second one as 3G-SDI transmitter and then multiplex de outputs?

Thanks in advance.

Configuration
  • RD-FD's avatar
    RD-FD
    2 years ago

    We were not properly managing tx_datain_valid signal for triple rate.

    The easyest way to do it is to drive tx_dataout_valid directly to that imput.

    Now we can switch between standarts perfectly.

    Thanks for your support

7 Replies

  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi ,

    Thank you for reaching out.

    Just to let you know that Intel has received your support request and currently we are confirming the details with our internal team.

    I shall come back to you with findings.

    Thank you for your patience.

    Best Regards,

    ZulsyafiqH_Intel


  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi RD-FD,

    Thank you for your patience.

    For Cyclone V device, the SDI II IP do support triple-rate design.

    Allow me to confirm with you below items:


    Q1. Is your project based on design example?


    Q2. If yes, did you generate the design in single-rate 3G or triple rate?

    Triple-rate supports switching between 3G-SDI, HD-SDI, and SD-SDI.


    Based on your case description, it seems like you are generating single-rate 3G, which will cause switching to HD-SDI result in no display. You may generate a triple-rate design to support your project.


    Hoping to hear back from you so that we can proceed for next step.

    Thank you.

    Best Regards,

    ZulsyafiqH_Intel


  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi RD-FD,

    Good day.

    I wish to follow up with you on this case.

    I would like to get update on my previous reply.

    Hope my previous reply gives you answer on generating Triple-rate design that supports switching between formats.


    Thank you.

    Best Regards,

    ZulsyafiqH_Intel


  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi RD-FD,

    Good day.

    I wish to follow up with you on this case.

    We have not heard from you for quite some time.

    Do you still have further inquiries on this issue?

    If there is no further inquiries, I will transition this thread to community support.


    Thank you.

    Best Regards,

    ZulsyafiqH_Intel


    • RD-FD's avatar
      RD-FD
      Icon for New Contributor rankNew Contributor
      2 years ago

      HI ZulsyafiqH_Intel,

      Thanks for your response.

      We just changed from single rate to triple rate as you adviced us, but we are still not having image when switch to HD-SDI.

      Previously we implemented succesfully HD-SDI and 3G-SDI versions of the IP as transmitter sepparately. But so far we have not been able to use both standards using the same IP core.

      Is there any important consideration that we may be missing?

  • RD-FD's avatar
    RD-FD
    Icon for New Contributor rankNew Contributor
    2 years ago

    We were not properly managing tx_datain_valid signal for triple rate.

    The easyest way to do it is to drive tx_dataout_valid directly to that imput.

    Now we can switch between standarts perfectly.

    Thanks for your support

  • ZH_Intel's avatar
    ZH_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    2 years ago

    Hi RD-FD,

    Good day.

    I’m glad that your issue has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread.


    Thank you.

    Best Regards,

    ZulsyafiqH_Intel