Method, apparatus and system for embedding data in and extracting data from encoded voice code

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EP 1 693 832 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	20.06.2007 Bulletin 2007/25

(43)	Date of publication A2:
	23.08.2006 Bulletin 2006/34

(21)	Application number: 06007029.9

(22)	Date of filing: 03.02.2003

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International Patent Classification (IPC):

G10L 19/00^(2006.01)

(84)	Designated Contracting States:
	DE FR GB

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Priority:

04.02.2002 JP 2002026958
24.01.2003 JP 2003015538

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	03250682.6 / 1333424

(71)	Applicant: FUJITSU LIMITED
	Kawasaki-shi, Kanagawa 211-8588 (JP)

(72)	Inventors:
	Ota, Yasuji c/o Fujitsu Limited Kawasaki-shi Kanagawa 211-8588 (JP) Suzuki, Masanao c/o Fujitsu Limited Kawasaki-shi Kanagawa 211-8588 (JP) Tsuchinaga, Yoshiteru Fujitsu Kyushu Network Fukuoka-shi Fukuoka 814-8588 (JP) Tanaka, Masakiyo c/o Fujitsu Limited Kawasaki-shi Kanagawa 211-8588 (JP) Sasaki, Shigeru c/o Fujitsu Limited Kawasaki-shi Kanagawa 211-8588 (JP)

(74)	Representative: Wilding, Frances Ward et al
	Haseltine Lake Lincoln House 300 High Holborn London WC1V 7JH London WC1V 7JH (GB)

(54)	Method, apparatus and system for embedding data in and extracting data from encoded voice code

(57) When a voice encoding apparatus embeds any data in encoded voice code, the apparatus determines whether data embedding condition is satisfied using a first element code from among element codes constituting the encoded voice code, and a threshold value. If the data embedding condition is satisfied, the apparatus embeds optional data in the encoded voice code by replacing a second element code with the optional data. When a voice decoding apparatus extracts data that has been embedded in encoded voice code, the apparatus determines whether data embedding condition is satisfied using a first element code from among element codes constituting the encoded voice code, and a threshold value. If the data embedding condition is satisfied, the apparatus determines that optional data has been embedded in the second element code portion of the encoded voice code and extracts this embedded data.

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