Systems and methods for processing a digital image
US10523951B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2017 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Aug 14, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/157
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus adapted, including a media encoder coupled to a data interface adapted to receive a frame or portion thereof. The media encoder is adapted to iteratively subdivide each block of a plurality of blocks partitioned in a frame or portion thereof and to process a subdivided block of the plurality of blocks, during each iteration of a plurality of iterations, by selecting a rotational symmetry mask fulfilling an efficiency measure for coding said block, the rotational symmetry mask selected from a plurality of rotational symmetry masks which define a plurality of different rotational symmetries in a multidimensional space, splitting the subdivided block to two complementary portions based on the rotational symmetry mask, generating a pair of rotational symmetry blocks each having one of said two complementary portions, and computing a plurality of transform coefficients from the pair of rotational symmetry blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.