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Ordered dither patterns for coarse quantization of pictures

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3 Author(s)

It is well known that a coarse quantizer can be used for pulse-code modulation (PCM) picture transmission when random dither is added to the video, and that synchronous dither subtraction at the receiver significantly improves picture quality. Two-dimensional ordered dither patterns are reported and illustrated which provide better picture quality than equivalent random dither and which do not require synchronous subtraction.

Published in:

Proceedings of the IEEE  (Volume:59 ,  Issue: 3 )