System for optimizing data transmission associated with addressa

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341173, 39520015, G06K 1500, H04L 1100

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active

RE0351105

ABSTRACT:
A method and a computer program for performing the method are disclosed for optimizing signals being exchanged between a host unit and an addressable-buffer peripheral device. The program optimizes an outgoing signal from the host unit by (1) creating an updated-state map representing the state of the peripheral device buffer expected to exist after processing by the peripheral device of the outgoing signal, (2) performing an exclusive-or (XOR) operation using the updated-state map and a present-state map representing the existing state of the buffer, and (3) constructing and transmitting a substitute outgoing signal which represents only changes to the buffer, and in which all premodified field flags are turned off. Position-dependent characters, such as attribute bytes are translated into nondata characters prior to incorporation into a map, and are retranslated into their original form for use in the substitute signal.

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