Codeword space reduction for intra chroma mode signaling for HEVC
US9591323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2014 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Jul 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/593
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Intra prediction is used in state-of-the-art video coding standards such as AVC. The intra prediction modes are coded into the bitstream. Luma and chroma components could potentially have different prediction modes. For chroma components, there are 7 different modes defined in AVC: vertical, horizontal, DC, diagonal directions, and “same as luma”. Statistics show that the “same as luma” mode is frequently used, but in AVC, this mode is encoded using more bits than other modes during entropy coding, therefore the coding efficiency is decreased. Accordingly, a modified binarization/codeword assignment for chroma intra mode signaling is able to be utilized for high efficiency video coding (HEVC), the next generation video coding standard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.