Chrominance signal interpolation
US6498609B1 · kind B1 · utility
Inventors
Key dates
| Filing date | May 2, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | May 2, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/646
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a method of chrominance signal interpolation, in which output chrominance signals (OUTUV) are interpolated (MED) from mutually corresponding input chrominance signals (INUV(N−1), INUV(N)) from mutually neighboring input images, a color saturation value of at least one of the output chrominance signals (OUTUV) is smaller than an average of color saturation values of the mutually corresponding input chrominance signals (INUV(N−1), INUV(N)) corresponding to the one output chrominance signal (OUTUV) if the mutually corresponding input chrominance signals (INUV(N−1), INUV(N)) meet a predetermined criterion. The expression “corresponding” relates to the chrominance signals concerned (INUV(N−1), INUV(N)) correspond both as to spatial positions in the mutually neighboring input images (N, N−1) and as to chrominance values, i.e., either U/I or V/Q. The criterion may be that the reference value (REF) lies between the corresponding input chrominance signals (INUV(N−1), INUV(N)), or that differences between the corresponding input chrominance signals (INUV(N−1), INUV(N)) exceed a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.