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PAL and NTSC

长江货郎
Prodigy 70 points

Hello, everyone:

 The  platform I use is  DaVinci DM6446  .

 I  want  to know  about  the  PAL  and  NTSC  mode.  Is  the  model(PAL or  NTSC)  of  the capture device  and  the display device  is fixed  on  this  platform        ?  Or  can be changed?

 If  it is can be setted  , how can I set it  in the app  about  capture  device   and  the  display device ?

 I am  reading  the demos/encode  ,demos/decode,  and  demos/encodedeocde .  But  I need your  help for me .

Thanks  very much!!!

 

  • 0
    Expert 1250 points

    As far as I know, your display device supports only one mode, for my monitor it is PAL, for example.

    There is probably a jumper on the board (on dm6437, there is one) where you define it as PAL or NTSC. Also in the demos you will see that you select a mode for venc such as "PSP_VPBE_DISPLAY_PAL_INTERLACED_COMPOSITE".

  • 0
    TI__Mastermind 41665 points

    Elric is right, the board can be set to output PAL or NTSC, in the case of the DM6446 (and most of our ARM based devices) this is done by passing a certain value into your U-Boot arguments, in particular the Getting Started Guide section 4.3.7 shows the method for using PAL. You can control the U-Boot argument (videostd) using switch 10 on S3 of the EVM, so if your U-Boot is setup as described in section 4.3.7 you can use that switch to change between the modes at boot up. Note that from a capture standpoint that the video decoder autodetects NTSC/PAL for you, so this is only configuring the display.