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:
Apr. 27, 2004
Filed:
Feb. 21, 2000
Takashi Kohashi, Tokyo, JP;
Nozomu Ikeda, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
The invention relates to an apparatus for superimposing additional information on information signals. This apparatus comprises a particular-pattern generator for generating plural particular patterns corresponding to additional information; a rotation block rotating, in a predetermined order, the sequence in which the plural particular patterns are arranged and outputting the sequentially rotated patterns; a phase inverting block for inverting the phases of the plural particular patterns for every period and outputting the phase-inverted particular patterns; and a superimposing block for superimposing each of the plural sequence-rotated and phase-inverted particular patterns on an information signal in a predetermined unit. The novel constitution enhances the secrecy of the additional information and the performance of its detection.