Information encoding apparatus and method, information...

Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion – With content reduction encoding

Reexamination Certificate

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C704S500000, C380S038000

Reexamination Certificate

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07379878

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.

REFERENCES:
patent: 5581653 (1996-12-01), Todd
patent: 5822432 (1998-10-01), Moskowitz et al.
patent: 5960398 (1999-09-01), Fuchigami et al.
patent: 6272176 (2001-08-01), Srinivasan
patent: 6850619 (2005-02-01), Hirai
patent: 7006555 (2006-02-01), Srinivasan
Patent Abstracts of Japan, Publication No. 10-162501, Publication date Jun. 19, 1998.

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