Method and apparatus for encoding/decoding image by using adaptive loop filter on frequency domain using conversion
US9538173B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2014 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Apr 2, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video encoding method for reducing encoding error by using a loop filter is provided, the method including: generating a reconstructed image from encoded data of an original image; determining one or more regions on which the loop filter is applied in the reconstructed image; transforming the original image and the reconstructed image which correspond to each region of the determined one or more regions from a spatial domain into a frequency domain; determining loop filter coefficients for said each region by comparing the transformed original image and the transformed reconstructed image; loop-filtering the reconstructed image based on the loop filter coefficients for said each region; and encoding information on the loop filter coefficients for said each region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.