Television signal processing unit which provides monitoring during periods of the television signal to detect erroneous circuit operation
US5325197A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Jul 23, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television signal processing unit which provides monitoring to detect erroneous operation of one or more circuit sections thereof during periods of the television signal. The processing unit includes a test signal generator and an evaluation circuit, the test signal generator supplying a test signal to a circuit section of the processing unit during allocated periods of each picture frame. The evaluation circuit compares the processed test signal produced by such circuit section with a predetermined specimen signal corresponding to correct circuit operation, and produces an error indication when the processed test signal differs from the specimen signal. The allocated test periods may be during portions of each picture frame which are not assigned to video information, or during other portions of a picture frame wherein no video information is actually present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.