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D1 video from DM6446 VPBE not display on tv

Ray Z
Prodigy 200 points

Hi, I found the left and bottom part of my D1 video is dropped by tv, it seems that the tv screen is so small  that cannot display completly.  does anyone have the same problem? Please help me!

  • 0
    Guru 31670 points

    Ray,

    Are you using PAL or NTSC? 

  • 0 in reply to Renjith Thomas
    Prodigy 200 points

    Hi, Renjith, I am using PAL.  Now I can sure that the video output is complete and the display device can not display it completely. but I am not sure if the VPBE driver need to be modified.

  • 0 in reply to Ray Z
    Guru 31670 points

    Ray,

    Can you check with NTSC and see?

    Also can you read the section "4.4.2.5 Window Scaling" in the VPBE document SPRUFG9C. This has more details where you can get more understanding on what might be leading to your situation.

  • 0 in reply to Renjith Thomas
    Prodigy 200 points

    Thank you for you reply. At first, I have the same idea wth you. but our video source is 720x576, so no zoom operation happened. I am wondering how to expand the display area to see the whole video. by now I use the default  driver parameter, that is:

        {   
         .name = VID_ENC_STD_PAL,
         .std = 1,
         .if_type = VID_ENC_IF_INT,
         .interlaced = 1,
         .xres = 720,
         .yres = 576,
         .fps = {25, 1},
         .left_margin = 0x7E,
         .right_margin = 0,
         .upper_margin = 0x16,
         .lower_margin = 0,
         .hsync_len = 0,
         .vsync_len = 0,
         .flags = 0},

    maybe the problem can be resolved by  modifying some members' value. I am tring.