REDUCTION OF COMPRESSION ARTEFACTS IN DISPLAYED IMAGES
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
May 14, 2009
app pub date -
Dec 12, 2006
filing date -
Dec 21, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In a method, receiver and display device a compressed data stream is decompressed. Decompression may cause ringing effect. In order to reduce ringing effects an analysis window (AWH, AWV) is used, which is divided into two sub-areas (AWH1, AWH2, AWV1, AWV2) along a dividing line d. For each of the sub areas a maximum pixel value gradient (MAXD1, MAXD2) is determined, wherein gradients are determined in two directions. If the maximum of all gradients (max(MAXD1, MAXD2) exceeds a threshold (max(MAXD1,MAXD2)>Tmax), low pass filtering is applied, provided that the difference between the maximum gradients for each of the areas is above a threshold (.ae butted.MAXD2-MAXD1.ae butted.>T1). The direction of low pass filtering is determined by the sign of the difference of the between the maximum pixel value gradient for the sub-areas.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully