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:
Sep. 24, 2019
Filed:
Dec. 09, 2015
Kabushiki Kaisha Toshiba, Tokyo, JP;
Masanobu Nakamura, Tokyo, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
A digital watermark embedding device includes a generating unit that makes use of a key random number which is input, and outputs a filter for determining a first band and a second band which represent at least a single pair of frequency bands in which a digital watermark bit is to be embedded; and an embedding unit that, when the digital watermark bit is to be embedded in a unit frame of a voice signal which is input, varies a sum of amplitude spectrum intensities of at least one of the first band and the second band in such a way that a first sum of amplitude spectrum intensities of the first band is greater than a second sum of amplitude spectrum intensities of the second band.