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OMAP4460 connectivity to NTSC/PAL decoder - BT656

K Md Feroz Irfan
Expert 7225 points
Other Parts Discussed in Thread: TVP5150AM1

Hi Champs,

We would like to interface an NTSC camera to the OMAP4460. We plan to use a TVP5150AM1 decoder. However it is just 10 bit and CPI is 16 bit. So 

          Please suggest us the following things-

 

1-    Part for video decoder for converting the composite video (NTSC/PAL) to BT656.

2-    Ways to connect the 8/10 bit decoder to 16 bit BT656 in OMAP4460. Assume LSB bits will be connected to LSBits of CPI. Any app note would be of great help....

Best Regards

Feroz

  • 0
    TI__Mastermind 24525 points

    I hope you realize that there is no CPI support in software. Is this something customer is willing to add on his own? 

  • 0
    Guru 31670 points

    Feroz,

    I may not be 100% correct here. According to my understanding BT.656 in ISS support 8-bit and 10-bit only. In 8-bit mode you can use the Y bus for the data lines and HD and VD signals to the corresponding HSYNC/VSYNC input lines in camera port. 10-bit mode interface is also explained. TVP5150AM1 is best suited for this application. If you are looking for an alternative, then MAX9526 is also one more option.

  • 0
    Intellectual 825 points

    Hi.

    You can connect LSB of your decoder to LSB of CPI. In any cases you can shift your data inside ISP as you needed.

    First check in TRM how ISP wants to get BT656 input data and connect decoder according it.

    WBR,

  • 0 in reply to Renjith Thomas
    TI__Expert 7225 points

    Hi Renjith, Mayank,

    Thank you for your inputs.

    Hi Mayank,

    Does not blaze based software have the CPI drivers to support BT656 signals? Also please comment on Renjtih's proposal of ISS. I suppose some of your cusotmers would have implemented this. 

    Best Regards

    Feroz

  • 0 in reply to K Md Feroz Irfan
    TI__Guru*** 125430 points

    K Md Feroz Irfan said:
    Does not blaze based software have the CPI drivers to support BT656 signals?

    No, we don't have this software available.  This is what Mayank was describing.  I think contracting MMS for this porting activity is your best bet.

     

    K Md Feroz Irfan said:
    Also please comment on Renjtih's proposal of ISS. I suppose some of your cusotmers would have implemented this.

    I don't quite understand your comments here.  Renjith didn't suggest anything substantially new.  As far as I can tell this discussion focuses on having an NTSC/PAL decoder connected to the CPI (which funnels into ISS).  The CPI can either be used with data plus hsync/vsync or it can be used in BT.656 mode which embeds the sync info within the data.  Regardless of which route is chosen there is no driver available.

     

     

  • 0 in reply to Brad Griffis
    Guru 31670 points

    Feroz/Brad,

    I don't think adding BT.656 support is such a big deal. Its will little less work than adding a new camera sensor. Currently we are working on NTSC/PAL decoder driver through ISS on Centaurus along with ISS-V4L2 driver on Linux.