Digital data encode system
US6175639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1998 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Feb 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91335
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital data encode system for inserting water mark data into digital data signals having a series of field data by use of a water mark data inserting device, the digital data encode system has a field judging unit dividing the digital data signals by a predetermined reference, a water mark data selection output unit for selecting proper one of a plurality of different water mark data prepared correspondingly to the division according to the judgment result of the field judging unit, and a water mark data inserting device for inserting the water mark data supplied from the water mark data selection output unit into the digital data signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.