Method and device for incorporating additional information into main information through electronic watermaking technique
US6959383B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1998 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Jul 7, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2240/311
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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, an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.