Apparatus for processing a television signal including a movement detector
US4703358A · kind A · utility
16Cited by
8References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1985 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Nov 15, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/254
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A movement detector is included in television signal processing apparatus in order to improve the performance of the apparatus. The detector evaluates an absolute frame difference signal on a sample by sample basis and, after comparison with a threshold level signal in order to remove the effects of noise is fed to an isolated point removal circuit where samples deemed to indicate movement are compared with surrounding samples and if identified as isolated are ignored. Adaptive control is provided if the threshold, the isolated point removal circuit and a quantizer circuit for non-linearly altering the frame difference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.