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[TVP7002] How to differentiate Output standard from BT.1120 to BT.656

Haoran Li1
Expert 1850 points
Other Parts Discussed in Thread: TVP7002

Hi,

    I am new to use this TVP7002 chip.  I managed to use the TVP7002 for converting HDTV component analog signals (YCbCr422 1080p60) and digitalizing them into BT.1120 embedded sync format.  Thus, I could feed the video input port of my DaVinci DM8168 processor with a 16-bit-nonmuxed-embedded-sync single.


    By referring to the Datasheet, however, I could not find anything related to BT.1120 or BT.656 format.  I do believe this chip would support such two standards.  But I  am not quite sure about how to configure this Chip and make its output as BT.1120 (with sync embedded).


    Could you please tell me how to set output standard BT.1120 for this chip?

Naroah

Feb/19/2014

  • 0
    TI__Mastermind 43875 points

    Please check the EVM setup files available here... http://www.ti.com/tool/tvp7002evm

    There are setup files which describe the commands necessary to program the TVP7002 to many different configurations and formats.

    BR,

    Steve

  • 0 in reply to Steve Clynes
    Expert 1850 points

    Hi Steve,

        Thank you for your reply!

        Actually, the setup files and command files are informative.  They help me a lot.  And I have also downloaded the software, namely WinVCC.  Setuping this software successfully, I managed to check the property sheet to ensure if the output format sheet has something relevant about BT.xxx.

        However, after checking the property sheet of TVP7002 in WinVCC, I don't find something derictly informed me which BT.xxx format, say, BT.656, BT.1120, is used.  What I can only find is the component Coding Range can be choosed as BT.601's (64 ~ 940) .  But the EAV and SAV codes between BT.1120 and BT.656 may be different, aren't they?

      

       So, could you please tell me how the TVP7002 distinguishs BT.656 from BT.1120?

      

    Naroah

    Feb/20/2014

  • 0 in reply to Haoran Li1
    TI__Mastermind 43875 points

    I suggest you check the appropriate standards specification documents.

    BT656 is an 8 bit interface with embedded syncs, ITU1120 is a 16 bit interface with embedded syncs.

    The different options that WinVCC exposes are embedded syncs or discrete syncs, and 8 bit or 16 bit.

    To achieve ITU1120 you need to select 16/20 bit output with embedded syncs.

    BR,

    Steve

  • 0 in reply to Steve Clynes
    Expert 1850 points

    Hi Steve,

         Thank you for your reply.

         I have gone through the specification document of ITU.1120.  I have my problem sloved.

         Your words are much helpful for me.

    Naroah

    Feb/21/2014

    PS. I would like to close the thread by verifying your answers.

  • 0 in reply to Haoran Li1
    TI__Mastermind 43875 points

    I am glad your issue is resolved. good luck with your project.

    BR,

    Steve

  • 0 in reply to Steve Clynes
    Expert 2200 points

    Hi Steve,

    From TVP7002 datasheet,  I find the following description:

    "10-bit 4:2:2 YCbCr output format (i.e., ITU-R BT.656) is not supported by the TVP7002."

    The output format of TVP7002 dont support 8-bit BT656 embedded sync?

    BTW,  Is it possible that TVP7002 output 8-bit BT656 data format to DM8168 VIP 8bit port, So I could use VIP0A,VIP0B,VIP1A,VIP1B in dm8168 to capture 4 channel BT656 data?

    The max. frequency of VIP port is up to 165MHz, 8-bit BT656 could support up to 1080i60 or 1080P30 capture?

    Any helps will be highly appreciate!

    Thanks!

  • 0 in reply to Steven Weng1
    TI__Mastermind 43875 points

    The TVP7002 can only output 16/20 bit 422 and 24/30 bit 444 formats. It does not support interleaved 8/10 bit formats.

    The DM816x can capture any resolution up to 1920x1080 in any format as long as the clock rate is less than or equal to 165MHz.

    BR,

    Steve

  • 0 in reply to Steve Clynes
    Expert 2200 points

    Hi Steve,

    Thank a lot.

    BR

    Steven