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Guest Message by DevFuse

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Pixellation on Black Backgrounds


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6 replies to this topic

#1 OFFLINE   igleaner

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Posted 05 September 2006 - 12:19 PM

Anyone else noticing excessive ghost images on dark backgrounds, especially after lighter images or credits are shown? When lettering or any lighter image disappears, it's almost as if it burned an image on the dark screen in the form of gray pixellation blocks.

This occurs on all stations, all the time. It is also apparent throughout the show on dark scenes. Of course, it probably also happens on bright scenes, but it is not apparent on light backgrounds.

Incidentally, it is not the tv, as it never happens during playback of DVDs. My tv is a Director's series Hitachi 57" Ultravision.

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#2 OFFLINE   Mark Lamutt

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Posted 05 September 2006 - 12:41 PM

Sounds like artifacting due to video compression to me.
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#3 OFFLINE   AmEx

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Posted 12 September 2006 - 11:17 PM

I think this could be something with the TV screen. How is your DVD hooked up to your TV? I would assume that your 942 is connected via hdmi. If that's the case then there is something wrong with your picture's refresh rate as it is too slow for the signal sent via hd cables. Try connecting your 942 to your TV using regular analog cable like rg59 and you will notice that the problem will not exist.

#4 OFFLINE   Jon Spackman

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Posted 13 September 2006 - 09:04 AM

But most likely is compression artifacts like Mark said :rolleyes:

#5 OFFLINE   AmEx

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Posted 14 September 2006 - 10:37 PM

Well said, "any 'fuzz' or 'crap' introduced into an image or video sequence by the compression algorithm is called an ARTIFACT"

#6 OFFLINE   igleaner

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Posted 05 October 2006 - 01:35 PM

My TV is connected to the 942 via HDMI cable. Even if I temporarily tried using analog RG59, it might make the artifacts disappear, but would also eliminate HD signals.

If the problem is truly caused by excessive video compression, is there anything I can do about it?

#7 OFFLINE   Jon Spackman

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Posted 06 October 2006 - 07:45 AM

No, :(




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