COPYRIGHT PROTECTION METHOD, INFORMATION SIGNAL PROCESSING SYSTEM, INFORMATION SIGNAL OUTPUT APPARATUS, INFORMATION SIGNAL PROCESSING APPARATUS, INFORMATION SIGNAL OUTPUT METHOD, INFORMATION SIGNAL PROCESSING METHOD, AND INFORMATION SIGNAL RECORDING MEDIUM
US6850619B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Sep 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/9135
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Additional information for copyright protection is added to a video signal (first information signal) and an audio signal (second information signal), which are associated with each other and are independently usable, in a video watermark information superimposition unit and an audio watermark information superimposition unit, respectively. The video signal and the audio signal having the additional information added are then output. In a receiving apparatus for receiving the video signal and the audio signal, copyright protection is performed on at least one of the video signal and the audio signal based on both the additional information added to the video signal and the additional information added to the audio signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.