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:
Dec. 11, 2012
Filed:
Oct. 01, 2001
Kar Yan Tam, Kowloon, HK;
Kai Fung Tsang, Kowloon, HK;
Sai Ho Kwok, Kowloon, HK;
Shing Chi Cheung, Chai Wan, HK;
Kar Yan Tam, Kowloon, HK;
Kai Fung Tsang, Kowloon, HK;
Sai Ho Kwok, Kowloon, HK;
Shing Chi Cheung, Chai Wan, HK;
The Hong Kong University of Science and Technology, Kowloon, HK;
Abstract
The present invention provides a method of embedding watermarking data in an audio signal which includes the steps of incorporating watermarking information into said audio signal, sectioning said signal into at least two sections, marking at least one said section whereby said sections may be identified, generating distortion in one said section of said signal in manner recoverable by a key obtainable from at least one other said section, and appending said distorted section to said at least one other section to form a composite signal comprising a distorted section to said at least one other section to form a composite signal comprising a distorted section and at least one undistorted section. The present invention is particularly useful for enabling advertisements and or trial listening sections to be added to an audio file in such a manner that they include the key for recovering a distorted section. If an attempt is made to remove the advertisement or trial section, then the key would be lost.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile