Video device and method for synchronising time bases of video devices
US7436456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2004 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Apr 11, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/268
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video system comprises a first video device which transmits a video signal comprising image information and synchronisation information and a second video device which receives the composite video signal. The second device has a time base. For synchronising the two devices synchronisation information is extracted from the video signal received by the second Video device and from the time base of the second video device; a phase difference between the video signal received by the second video device and the time base of the second video device is determined based on the extracted synchronisation information; control information of a first type representative of the amount of the phase difference is transmitted to the first device; and in the first device the phase of the video signal is switched by a phase angle represented by the first type control information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.