ADV7393 and AD725 Interface

Hi,

I'm working with ADV7393 and AD725 for RGB to Y/C video output.

During the design phase i thought the sync pulse is comes only on Green(G) color input signal.

So i stripped the sync pulse by using the AD8062 only on green color and feed to AD725 chip, without sync stripping of Red and Blue.

Hence the Y/C video output color is distorted (as a blueish).

If i control the ADV7393 0x02[4] register

as enabled, the output comes blueish and if i disabled, the total image/video is distorted.

So how to preserve the original image/video (without color deviation) in this design?

Thanks,

Siva

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    •  Analog Employees 
    on Aug 2, 2018 3:19 PM over 2 years ago
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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    EZ Admin
  • Hi,

    I am also facing the same issue. I am using ADV7393 IC and its output is connected to AD725.

    i stripped the sync pulse by using the AD8062 on green, blue and red color and feed to AD725 chip.

    I fed green signal to EL1881 sync separator IC from ADV7393 IC  to separate the sync signal and fed SYNC output from this IC to HSYNC pin of AD725.

    But the Y/C video output color is distorted (as a blueish, greenish,grey).

    If i control the ADV7393 0x02[4] register

    as enabled, the output comes blueish and if i disabled, the total image/video is distorted.

    So how to preserve the original image/video (without color deviation) in this design?

Reply
  • Hi,

    I am also facing the same issue. I am using ADV7393 IC and its output is connected to AD725.

    i stripped the sync pulse by using the AD8062 on green, blue and red color and feed to AD725 chip.

    I fed green signal to EL1881 sync separator IC from ADV7393 IC  to separate the sync signal and fed SYNC output from this IC to HSYNC pin of AD725.

    But the Y/C video output color is distorted (as a blueish, greenish,grey).

    If i control the ADV7393 0x02[4] register

    as enabled, the output comes blueish and if i disabled, the total image/video is distorted.

    So how to preserve the original image/video (without color deviation) in this design?

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