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  Reply # 960239 2-Jan-2014 12:07 Send private message

I've uploaded the below video which shows the issue:

http://www.youtube.com/watch?v=RLQ1ICM26Zk&feature=youtu.be

(how do i embed this video?)

I have now tested on two different computers using two different VGA cables so i believe I've eliminated the PC/cable causing the issue.

The TV is not in eco mode either.

Note this doesn't happen when connected via HDMI.



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  Reply # 960486 3-Jan-2014 00:19 Send private message

that looks like macrovision in action.



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  Reply # 960588 3-Jan-2014 10:45 Send private message

ilovemusic: that looks like macrovision in action.


But why would it only happen over VGA and not when connected via HDMI?

And it doesnt happen on my smaller 50 inch lcd screen whena lso connected via vga.



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  Reply # 967656 15-Jan-2014 16:26 Send private message

Hi guys,

FYI - Sharp's formal response to this:

"With regards to your enquiry, we believe this issue with the full screen VGA is caused by macro vision impregnated in the video sync (to stop copying). When the window task bar is on screen the sync is generated by the PC, hence no problem is experienced.


We would recommend using a HDMI connection rather than VGA in this case. HDMi, contains DRM (digital rights management) which prevents copying and the source knows is contacted to a monitor rather than a recording device so the picture is enabled."

What are your thoughts? Does this sound legit?

If that is the case, why doesn't it happen on my smaller 55inch TV too?

783 posts

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  Reply # 967668 15-Jan-2014 16:57 Send private message

i was right ?

damn, thought macrovision died ages ago with vhs.

as it's an analogue process it won't show up on hdmi.

dunno why it doesn't affect your smaller tv.

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  Reply # 969128 17-Jan-2014 21:24 Send private message

I have never heard of macrovision being applied to RGB VGA cables.

The benifit of using HDMI is you can get it to transport component video which will signifigantly reduce banding in the darker areas and will also have less quantisation errors.

It might be some form the dynamic range of the image changing and the TV trying to match, I had a projector that did that over VGA, put a dim photo up and it would then stretch the levels out to full scale making it wash out shadow details. There was some buryed option to turn it off and it was better, but it still had massive crush at the white end when using VGA.

As for the seller saying their DVI to HDMI cable wont work for computer to tv, probably sick of people putting it into a PC outputting PC resolutions into a TV that doesnt want to take them calling the cable faulty.




Richard rich.ms

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