Image decoding apparatus and method
US8073270B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 2008 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Oct 6, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/59
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image decoding apparatus is provided, including a parser and an AC decoder. The parser is provided for parsing a bit stream to acquire a first unit. The first unit includes a DC code and a plurality of AC codes respectively corresponding to a DC coefficient and AC coefficients for a first block of the image. The AC decoder generates a plurality of first AC coefficients for the first block by decoding the plurality of AC codes of the first unit, and determines whether the number of the plurality of first AC coefficients exceeds a predetermined parameter. If so, the AC decoder obtains a second unit of the bit stream corresponding to a second block following the first block by performing an AC bypassing process on the first unit. Each AC code comprises a Huffman code and a VLI code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.