Patent · US Active

Watermarks for text content

US11457120B2 · kind B2 · utility

0Cited by

16References

20Claims

0Family size

Assignee

Citrix Systems, Inc. · US

Inventors

Sai Xu · Nanjing, CN
Yuran Ou · Nanjing, CN
Qin Zhang · Beijing, CN

Key dates

Filing date	Oct 31, 2019
Grant date	Sep 27, 2022
Priority date	—
Expiry date	Nov 5, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH04N2201/3266
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Improved watermarking techniques for text content are disclosed. An example methodology implementing the techniques includes selecting a sequence of text characters to form a watermark and representing at least one text character of the sequence of text characters by a code which, when inserted into text content, does not affect the appearance of the text content. The methodology also includes embedding the code which represents the at least one text character of the watermark into text content so that the code enables identification of the at least one text character upon extraction of the code from the text content.

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