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:
May. 27, 2008
Filed:
Jul. 10, 2003
Tetsujiro Kondo, Tokyo, JP;
Gakuho Fukushi, Chiba, JP;
Masaaki Hattori, Chiba, JP;
Kazutaka Ando, Kanagawa, JP;
Hiroto Kimura, Tokyo, JP;
Tetsujiro Kondo, Tokyo, JP;
Gakuho Fukushi, Chiba, JP;
Masaaki Hattori, Chiba, JP;
Kazutaka Ando, Kanagawa, JP;
Hiroto Kimura, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An information encoding apparatus and method, an information decoding apparatus and method, a recording medium, and a program make it possible to embed information without causing an increase in the amount of data of compressed audio signals. A spectrum measurer converts an audio signal from a time axis signal into a frequency axis signal. A compressor removes frequency spectra having levels below a minimum audible threshold value. An embedability determiner determines whether information can be embedded. A spectrum switcher embeds information in an audio signal by switching or by not switching predetermined first frequency spectrum and second frequency spectrum under the control of an information adder. The present invention is applicable to a disk recording apparatus.