Block distortion detection method, block distortion detection apparatus, block distortion removal method, and block distortion removal apparatus
US7706450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2005 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A video decoder is connected with a block distortion detector for specifying the boundary of blocks where block boundary occurs, using decoded image data and information of motion vectors, which are supplied from the video decoder; and a block distortion remover for subjecting pixels in the vicinity of the block boundary of the decoded image to filtering on the basis of the result of detection from the block distortion detector, thereby removing the block distortion. Therefore, block distortion is accurately detected when a compressed and coded image is decoded, and the detected block distortion is removed while minimizing the blurriness of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.