Video muting apparatus
US5382981A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1993 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | Jun 10, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The video muting apparatus is provided with a controlling apparatus which calculates the video muting time TM from the correlation between the power feeding time T1 counted by the first counter and the power feed stopping time T2 counted by the second counter and controls the operation of the switch on the basis of the calculated video muting TM. The switch will operate to be opened on the basis of the controlling signal from the controlling apparatus during the period from the starting time point when the power feed by the power supply circuit is started until the video muting time TM elapses and will operate to be closed on the basis of the controlling signal from the controlling apparatus immediately after the the video muting time TM elapses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.