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:
Nov. 03, 1999
Nozomu Ikeda, Tokyo, JP;
Akira Ogino, Tokyo, JP;
Takashi Kohashi, Tokyo, JP;
Yuji Kimura, Kanagawa, JP;
Hisayoshi Moriwaki, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An additional information transmission method for transmitting an information signal and additional information in the form of an electronic watermark. The electronic watermark information is generated and superimposed on the information signal for transmission so as to form a superimposition/non-superimposition pattern corresponding to first additional information and transmitting second additional information on the information signal such that one value of one-bit information is expressed by a period in which electronic watermark information is superimposed on the information signal and other values of one-bit information are expressed by a period in which the electronic watermark information is not superimposed.