Multi-bit information hiding using overlapping subsets
US9294779B2 · kind B2 · utility
2Cited by
1References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2012 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Aug 17, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit. Sign bits are hidden in the parity of partially overlapping subsets of a set of coefficients. This enables the hiding of multiple sign bits per coefficient group. Other information bits may be hidden instead of sign bits in some cases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.