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Whenever a video image is re-sized, from 108 to 720 for example, there is a small delay to the image. It can sometimes be as little as a single frame but some re-size engines can take three or four frames.

However, the largest delay in a received video signal is normally the de-compression process that "unpacks" a compressed signal to a full bandwidth signal. This process is needed before the image can be displayed on a screen and can be from a few frames of delay up to ten or more.

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