Debanding from 10 bits to 8 bit per channel

if i have a video file with 10 bit/channel  and i would like to encode that to a 8-Bit h264 file... and, of course i get a lot of banding. is there a tool or a plugin in premiere that does ordered dithering (10 To 8 Bit) such as a floyd steinberg algorithm (to get a better quality than by adding noise to blurr the banding)? thanks

The color setting is change from 32-bit color to 8-bit color?
Sometimes the Windows display is affected by compatibility settings in your Firefox shortcut, the icon you use to start Firefox. If you right-click that and choose Properties, then click over to the Compatibility tab, here is where you would indicate that you want Windows to look more primitive when using Firefox. For best results, UNCHECK everything on this tab (in other words, use all of the capabilities of Windows XP).
Was that it?

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    See if your in quick mask mode.
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