Comb filter arrangement having delay time compensation and load matching in all circuit paths
US5216495A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1992 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Feb 19, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For a comb filter arrangement, for example, for separating a color picture signal into a modulated chrominance subcarrier and a luminance signal, while generating two comb filter function, a one-stage median filter (21) is provided in which the amplitudes of the simultaneously available signals of three picture lines and the two comb filter functions are compared with each other in a comparator stage which supplies logical comparison signals to a selection logic (30) in dependence upon the comparison results. The selection logic (30) constantly determines the signal having the middle instantaneous amplitude of the signals applied to the comparator stage on the basis of the comparison signals, and applies this signal to the medium filter output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.