Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2008-11-19
2010-12-07
Pyzocha, Michael (Department: 2437)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S168000, C713S193000, C382S190000, C382S191000, C358S003280
Reexamination Certificate
active
07849319
ABSTRACT:
Two data units are selected from main information, such as MIDI data, into which additional information is to be incorporated, to calculate a difference between respective values of the two data units. A particular data segment to be incorporated into one of the MIDI data units is selected from a group of data of additional information. The size of the data segment to be incorporated into one of the data units may be either one bit or two or more bits. Substitute data to replace the content of one MIDI data unit is generated on the basis of a predetermined function using, as variables, the data-related value and a value of the particular data segment, and the content of the data unit corresponding to a predetermined one of the two MIDI data units is replaced by the generated substitute data. Thus, through such an electronic watermarking technique, any desired additional information can be incorporated into the MIDI data without changing the MIDI data format. In another implementation, data of encoding information, representative of an encoding procedure, are incorporated dispersedly into particular data units belonging to a predetermined first data group of the main information, and data belonging to a predetermined second data group of the main information are encoded by the encoding procedure represented by the encoding information.
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Taruguchi Hideaki
Terada Kosei
Fields Courtney D
Morrison & Foerster / LLP
Pyzocha Michael
Yamaha Corporation
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