Method and system for utilizing non-local means (NLM) for separation of luma (Y) and chroma (CbCr) components
US8508668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2009 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Jan 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
One or more processors and/or circuits receive a composite video signal and determine a current pixel and a plurality of reference pixels. A plurality of weighting factors corresponding to the reference pixels are determined utilizing non-local means. Chroma components and/or luma components for the current pixel are determined based on weighted least squares utilizing the reference pixels, the weighting factors and information known about the composite signal, for example, sub carrier information. The composite video signal may comprise baseband Y and modulated Cb and/or Cr components. Weighting factors are determined by comparing a block of pixels about the current pixel with a block of pixels about the corresponding reference pixels in a current, previous or future frame. A set of equations comprising reference pixel data, a set of weighting factors and/or the known information may be solved to the determine signal components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.