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VPIF driver queries

Girisha SG
Intellectual 970 points
Other Parts Discussed in Thread: TVP5147

Hi, We want to modify VPIF driver to transfer video and audio data over (i.e. we allocate a bigger video buffer, first some lines represent video and the remaining lines represents audio data) it. What is the maximum video and audio resolutions can be transferred using this method and how it is being calculated ? what are the other things that we need to consider while modifying the driver for this ?

  • 0
    TI__Expert 3925 points

    Hi,

     

    You can transfer audio data in the vbi interval. For this, you have to open vbi device and do streaming on this device.

     

    Thanks,

    Brijesh Jadav

  • 0 in reply to Brijesh Jadav80
    Intellectual 970 points

    Hi,

    Thanks Brijesh.

    Can you explain more about this method as I am not much aware of the driver and the above said methodology ?

    Thanks in advance.

    Thanks,

    Girish

  • 0 in reply to Girisha SG
    TI__Mastermind 37340 points

    VBI = Vertical Blanking Interval.   Per video industry standards, this non-active portion of video frame can be used to pass other information such as close caption data.  I believe the suggestion above was that you may be able to use this portion of the video frame to transfer audio data, without affecting the active video data.

    That said, can you describe your setup a little more.  Are you capturing video as well as transferring video + audio using VPIF?  If so, how is this data stored in DDR2? ... depending on your setup and system requirements, you may be able to use VPIF as a generic data-transfer bus (what is receiving this data, another DM6467, FPGA...?)

  • 0 in reply to Juan Gonzales
    Intellectual 970 points

    DM6467 will capture the video+audio data from FPGA and display the video+audio data to FPGA over VPIF.

  • 0 in reply to Juan Gonzales
    Prodigy 240 points

    Hi,

     We are working with DM6467 evaluation board, wated to check whether any sample code snippet is available to demonstrate sliced and raw VBI capturing on CVBS input from TVP5147.  We wanted some startup steps to parse VBI information being streamed from our vbi stream generator.

    Thanks in advance