Video encoding device, video decoding device, video encoding method, video decoding method, video encoding or decoding program
US9521433B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2008 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Oct 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Intended is to obtain a video encoding device, a video encoding method, and a video encoding program which enable to prevent reduction in compression efficiency caused by drastic changes in symbol occurrence probabilities in context adaptive coding, and a video decoding device, a video decoding method and a decoding program corresponding thereto.The video data 101 is input into video encoding device on a macroblock basis, and after quantization, the PCM determination unit 139 determines whether the coded data 123 is PCM mode or not. Even when the coded data 123 is PCM mode, the context updating unit 301 executes context updating processing so as to improve efficiency of binary arithmetic coding. According to the determination of PCM mode or non PCM mode, the third switch 148 supplies either binary arithmetic coding output or PCM coding output as its output data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.