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DM8168 decoded video YUV data output

XIONG Zhihui
Intellectual 510 points

Dear all,

       I am using DVR RDK 4.01.  For now, I can get the decoded data using the following steps:

        2 diff. rtsp streams  -----> DM8168 live555 -----> decode 2 streams -----> hdmi out  ----> hdmi in -----> fpga process based on decoded data

       And I want to remove the hdmi interface, and  implement sth. like the following steps:

      2 diff. rtsp streams  -----> DM8168 live555 -----> decode 2 streams -----> fpga process based on decoded data

       My question is following:

        (1) Is it possible to output decoded YUV data from DM8168 ?

        (2) How many ports could I get ?  I am using 8 bit YUV 420 format or YUV 422 format.

        (3) What I need to do to output decoded YUV data directly. I mean where should I change the DVR RDK codes.

        Thansk

                                                                                                                   

     

  • 0
    Guru 31670 points

    Hi XIONG,

    IMO there are couple of ways that you can interconnect.

    1. Using PCIe, and share the decoded buffers with the FPGA. This will be very simple to implement. You'll have to check the bandwidth needs however.

    2. Use Display out interface (DVO2) directly and use FPGA to capture from these lines directly. One thing you need to clarify would be whether availability of YUV formats directly. In this case you can get two different ports.

    3. Similar to step one you can use GPMC interface for interconnecting FPGA. You'll memory mapped address space of the FPGA in DM8168. 

  • 0
    Prodigy 50 points

    May I have U QQ num? I want to learn for U sth ,or can y + my QQ 510693455  ths very much!