Decoding-processing apparatus for decoding bitstreams encoded in accordance with an arithmetic-encoding system in image compression and method for performing the same
US8081683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2010 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Apr 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A decoding-processing apparatus that decodes bitstreams using an intermediate format. The apparatus includes a context-calculating unit (2) calculating the probability of symbols contained in incoming bitstreams, a parameter-generating unit (3) generating parameters for use in the context-calculating unit (2), and an arithmetic decoding-calculating unit (4) decoding the incoming bitstreams in accordance with the probability, thereby providing decoded data. The apparatus also includes a stream-converting unit (5) converting the decoded data into intermediate bitstreams, a storage unit (6) storing the intermediate bitstreams, a synchronization-detecting unit (7) detecting calculation start timing from the intermediate bitstreams fed out of the storage unit (6), thereby providing detected calculation start timing, and a multivalued calculating unit (8) permitting the intermediate bitstreams fed out of the storage unit (6) to be multivalued in synchronism with the detected calculation start timing from the synchronization-detecting unit (7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.