1. An error diffusion halftoning apparatus, comprising: an input for receiving a sequence of pixels; a halftoner coupled to said input for performing a halftoning operation on each of said pixels; an error diffuser coupled to said halftoner for producing diffusion errors in response to quantization errors associated with said halftoning operations; and a controller coupled to said halftoner and said error diffuser for providing control signaling to said halftoner and said error diffuser, said error diffuser responsive to said control signaling for producing a set of diffusion errors while said halftoner is simultaneously performing a current halftoning operation in response to said control signaling, said set of diffusion errors associated with a previous halftoning operation performed by said halftoner before said current halftoning operation.