Owner Silverbrook Research Pty Ltd

Inventors Napper, Jonathon Leigh

Agent Silverbrook Research Pty Ltd

Pub. Number AU-B-2002333062

PCT Number PCT/AU02/01391

PCT Pub. Number WO2003/044723

Priority PR 8902 16.11.01 AU

Filing date 15 October 2002

Wipo publication date 10 June 2003

Acceptance publication date 4 January 2007

G06K 9/62 (2006.01) Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - Methods or arrangements for recognition using electronic means

G06K 9/22 (2006.01) Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints - using hand-held instruments

H03M 7/30 (2006.01) Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits - Compression

H03M 7/36 (2006.01) Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits - Conversion to or from differential modulation with several bits, i.e. the difference between successive samples being coded by more than one bit

H03M 7/40 (2006.01) Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits - Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code