Video signal noise reduction apparatus, a method of reducing a noise in a video signal, and a recording medium storing a program of the method
US6757014B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel data outputting circuit outputs center and peripheral pixel data from a video signal. A difference calculation circuit calculates differences of the peripheral pixel data from the center pixel data. A correlation pixel data detecting circuit detects a portion of the peripheral data showing high correlation according to the differences and a threshold value. A counter counts the portion of the peripheral data showing high correlation. A selecting circuit responsive to the correlation pixel data detecting circuit selectively outputs a portion of the differences of the portion of the peripheral data. A summing circuit obtains a sum of the portion of the differences in accordance with the counting result. A dividing coefficient generating circuit generates a dividing coefficient of 2n according to the counting result. A dividing circuit divides the sum with the dividing coefficient. An adding circuit adds the dividing result to the center pixel data to generate an output video signal. A weighting circuit weights each of the portion of differences according to the predetermined priority, wherein the summing circuit obtains the sum from the weighted differences. The corresponding…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.