Image encoding apparatus and method of controlling same
US10003821B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 2016 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Jan 21, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To suppress image degradation of a tile boundary while suppressing an increase of an amount of encoded data due to tile division. When performing a wavelet transform on a tile of interest, a wavelet transform unit performs a wavelet transform by referring to pixel data of the tile of interest and a neighboring tile that neighbors the tile of interest to obtain transformation coefficient data of a set resolution level. From transformation coefficient data obtained from the neighboring tile, the wavelet transform unit supplies a subsequent quantizing unit with transformation coefficient data of each resolution level that is closest to a boundary between the tile of interest and the neighboring tile, as well as all transformation coefficient data obtained from the tile of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.