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US09578347B2 Multi-bit information hiding using overlapping subsets 有权
使用重叠子集隐藏多位信息

Multi-bit information hiding using overlapping subsets
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.
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