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Altera_Forum's avatar
Altera_Forum
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17 years ago

DE2 TV Decoder

Hi,

I've been trying to make the TV Decoder design work on the DE2 board, and haven't been able to! I've tried both versions (PCB 1.x and 2.x) and neither worked. I remember I had tried it long time ago with my older camera as input, and it worked with a bit of video flicker, but now I don't have that camera any more and it just doesn't work with any source that I have. There's just simply no output to the VGA. I know the VGA works as the default program is working fine.

Has anyone else experienced similar behavior? At first I thought my board was not working, but then I realized it's the case with other boards too. To me it seems that the decoder can not sync to the input video. I say that because I wrote my own program to decode the input signal and display it, but the video flickers a lot. Could it be the configuration sent to the decoder?

I'd appreciate any suggestions,

Kaveh

16 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    17 years ago

    >Has anyone else experienced similar behavior?

    Yes, I have.

    I've tries DVD-out and PC Video-out - come to nothing.
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    I have has the same problem, if i remove the input source, i get a blue screen on my vga monitor.

    Has anyone found a solution as yet
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Hi,How to change default values of Adv7181B using I2C. My goal is to right code to display video output on the VGA monitor.

    Plzzzz help me.
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    asi_ka

    Are you talking about DE2_TV ?

    It works fine for me, just use a standard NTSC video signal in.

    The core detects syncro signal to blank the VGA screen, also it's correct.
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Hi.

    It's not my code, it's in the DE2 cd.

    Although if you want, when I'll have some free time, I could upload the entire project, that I add, brightness, color, contrast controls and more.
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    @knife_of_deat:

    I am using the DE2_TV example and it works. I connected a DVD player with NTSC signal to Video-In and a TFT-Monitor to VGA-Out.

    Maybe you can describe the problem a little more detailed?

    Did flashing work? Have you tried the default program?

    regards,

    Alex
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    I did try the sample code, my conclusion then was that the NTSC signal that I was using as input wasn't exactly the one the decoder chip on DE2 expects (slight freq. difference I think).

    Kaveh