The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2026
Filed:
Oct. 20, 2023
Ming Xuan Yue, Vancouver, CA;
Mohammad Akbari, Coquitlam, CA;
Xin Che, Vancouver, CA;
Yong Zhang, Richmond, CA;
Ming Xuan Yue, Vancouver, CA;
Mohammad Akbari, Coquitlam, CA;
Xin Che, Vancouver, CA;
Yong Zhang, Richmond, CA;
HUAWEI CLOUD COMPUTING TECHNOLOGIES CO., LTD., Gui Zhou Province, CN;
Abstract
Systems and methods embedding a frequency domain-based watermark in tabular data are provided. In some methods, a covariance matrix is computed for the tabular data. Row vectors of the tabular data are projected onto two orthonormal vectors e, eof the covariance matrix. A signal space for the projected row vectors is determined. A frequency f* with a lowest power from the signal space is located. A watermark is embedded in the tabular data based on the frequency f*.