发明授权
- 专利标题: Multi-bit information hiding using overlapping subsets
- 专利标题(中): 使用重叠子集隐藏多位信息
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申请号: US15050625申请日: 2016-02-23
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公开(公告)号: US09578347B2公开(公告)日: 2017-02-21
- 发明人: Dake He , Jing Wang , Xiang Yu
- 申请人: Blackberry Limited
- 申请人地址: CA Waterloo
- 专利权人: BlackBerry Limited
- 当前专利权人: BlackBerry Limited
- 当前专利权人地址: CA Waterloo
- 代理机构: Rowand LLP
- 主分类号: H04N7/18
- IPC分类号: H04N7/18 ; H04N19/44 ; H04N19/463 ; H04N19/91 ; H04N19/48 ; H04N19/467
摘要:
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.
公开/授权文献
- US20160173901A1 MULTI-BIT INFORMATION HIDING USING OVERLAPPING SUBSETS 公开/授权日:2016-06-16
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