Image encoding method, image encoding apparatus, and image encoding program
US10085018B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2014 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Sep 8, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/119
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image encoding apparatus capable of reducing the computational complexity in intra-prediction of an encoding optimization process is provided. The image encoding apparatus includes a reference pixel generation unit that generates reference pixels from predicted pixels of neighboring pixels and pixels of an original image for intra-prediction directions, a pseudo intra-predicted pixel generation unit that generates pseudo intra-predicted pixels from the reference pixels and the intra-prediction directions, a coding cost calculation unit that calculates coding costs for the intra-prediction directions from errors between the pseudo intra-predicted pixels and the pixels of the original image and generated bit amounts when the pseudo intra-predicted pixels are generated, and an intra-prediction direction setting unit that sets an intra-prediction direction corresponding to the lowest coding cost among the coding costs as an optimal intra-prediction direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.