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:
Oct. 21, 2003
Filed:
Jun. 01, 2000
Applicant:
Inventors:
Takayuki Sugahara, Yokosuka, JP;
Joji Naito, Yokosuka, JP;
Assignee:
Victor Company of Japan, Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/00 ;
U.S. Cl.
CPC ...
G06K 9/00 ;
Abstract
In a method of inserting watermark information into digital data, a specified data value is determined in response to the watermark information. A data-value occurrence-frequency distribution of a predetermined number of samples of the digital data is changed into a modified occurrence-frequency distribution in which the specified data value occurs at a frequency extremely different from frequencies of occurrence of data values other than the specified data value.