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DM365 encodedecode

toowudi
Prodigy 80 points

Other Parts Discussed in Thread: TVP5146

Hello,

I'm using the DM365 develop kits. When I run the demo of encodedecode, I found the information of one frame's two fields are same. But I hope the information of two fields per frame are different. What I shall modify?

Thanks.

  • 0
    TI__Genius 12865 points

    Hi Toowudi,

    Not sure if I fully understand your question. The encodedecode demo on DM365 handles progressive frames, hence have only one field. Interlaced input formats are not supported.

    Best regards,

    Vincent

  • 0 in reply to Vincent W.
    Prodigy 80 points

    Hi Vincent,

    Thank you.

    I'm sorry. Maybe, I haven't express my thought clearly. The input video, PAL standard, is two fields information in one frame, 25 frames per second. I hope I can reserve the two fields' information. What shall I do? Possibly, how shall I modify tvp5146 and get the video, which includes two fields information?

    Best regards,

    Toowudi

  • 0 in reply to toowudi
    Expert 2315 points

    I used encodedecode demo and fbdev_loopback demo and both apps got the field information out from the tvp5146 by configuring it as pal-i.  Did you manage to get it going?  I changed colorspace to UYVY to have demos run similar with regards to the data (barcode on the left side) I was adding to the separate fields.

    Jinh T.

  • 0 in reply to Jinh
    Prodigy 100 points

    sorry for late reply,and also sorry for not understanding the word "encodedecode",what does it mean, the first sight i saw it, i was remind the barcode generator for the word"encode",and the barcode reader for the word "decode",nothing related ?

  • 0 in reply to mariah sharp
    Expert 2315 points

    encodedecode means the program takes the analog video and encodes it to a digital format with the tvp5146 where the processor can then manipulate it and then it decodes the digital data to analog again by putting it through ADC's to make is analog again.

    the barcode is just bit encoding done on the left edge of each video field in order to insert data per field/frame on the video. google for left egde encoding of video for some more info.  it is used specifically to have synchronised data per field incorporated directly in the video stream for use later.