Patent ID: 7990292
Filing Date: 2011-08-02
Classification: G06F

Abstract:
1. A method to transfer an alphanumerical message from a screen to a receiver, comprising converting said alphanumerical message into a first bit sequence, using a first mapping wherein each numeral is represented by an ordered set of four bits and other characters are represented by ordered sets of eight bits, the first four bits of said ordered sets of eight bits being distinct from each of said ordered sets of four bits used to represent numerals; dividing set first bit sequence into one or more frames, each of which may be extended with padding bits so as to have a total number of bits that is a multiple of six; converting each of said frames into a trit sequence, using a second mapping whereby distinct ordered sets of six bits are represented by distinct ordered sets of four trits; converting each of said trit sequences into an image sequence that, when displayed, represents said trit sequence as a plurality of pixel sets modulated to at least three distinct output levels.