Patent · US Active

Embedding and detecting hidden information

US8311265B2 · kind B2 · utility

14Cited by

3References

9Claims

0Family size

Assignee

Beijing Sursen International Information Technology Co., Ltd. · CN

Inventors

Donglin Wang · Beijing, CN
Shutian Yin · Lo Wu, CN
Yunming Zhang · Beijing, CN
Ningsheng Liu · Beijing, CN
Yuansong Liang · Beijing, CN
Changwei Liu · Nanhu, CN
De Ouyang · Beijing, CN
Peng Gao · Nanhu, CN
Yongzhi Lou · Beijing, CN

Key dates

Filing date	Mar 17, 2008
Grant date	Nov 13, 2012
Priority date	—
Expiry date	Sep 14, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04N2201/3284
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A novel method is disclosed for embedding hidden information in a document comprising characters, including: determining hidden information to be embedded in each class of layout transformation respectively; acquiring a code sequence for each class of layout transformation by coding the hidden information to be embedded in the class of layout transformation; performing layout transformation on characters from the document according to the acquired code sequence for each class of layout transformation respectively.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.