Patent · US Expired

Recursive noise reduction with still pixel detection

US7176982B2 · kind B2 · utility

12Cited by

5References

27Claims

0Family size

Assignee

Huaya Microelectronics · KY

Inventors

Ge Zhu · Shanghai, CN
Edward Chen · Fremont, US
Henry Tung · Palo Alto, US

Key dates

Filing date	Sep 9, 2003
Grant date	Feb 13, 2007
Priority date	—
Expiry date	Feb 20, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH04N7/012
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A system and system for performing adaptive recursive noise reduction with still pixel detection on a video stream is presented. After processing a field pixels that were modified are stored in the field so that processing of later fields uses the modified pixels. Furthermore, the system uses novel still pixel detection routines that include multiple thresholds and multiple windows of pixels so that noise reduction is only performed on still pixels.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.