Block distortion reduction method and device and encoding method and device
US6434275B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1999 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Jun 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/86
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus incorporates encoding-degree-of-difficulty detecting means 3 for detecting a parameter indicating an encoding degree of difficulty from supplied image data; parameter calculating means 4 for calculating a parameter required to determine block distortion from supplied image data; block distortion determining means 6 for determining block distortion in accordance with a result of detection of the parameter indicating the encoding degree of difficulty and a result of the calculation for obtaining the parameter; correction-value calculating means 7 for calculating a correction value for reducing block distortion; and means for subjecting supplied image data to a correction using a correction value corresponding to a result of the determination of block distortion so as to produce an output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.