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Title:
DEVICE AND METHOD FOR EMBEDDING A WATERMARK IN AN AUDIO SIGNAL
Document Type and Number:
WIPO Patent Application WO2002103695
Kind Code:
A3
Abstract:
The invention relates to a method for embedding a watermark in an audio signal, according to which a spectral representation of the audio signal and a spectral representation of the watermark signal are first determined (14, 16). The spectral representation of the watermark signal is then processed, based on a psychoacoustic masking threshold (24) of the audio signal (22). The processed watermark signal is combined with the audio signal (18). The spectral representation of the watermark signal is processed iteratively in the following way: a predetermined watermark initial value (26) is first selected; the interference that has been introduced into the spectral representation by the predetermined watermark initial value after a quantization of the spectral representation of the audio signal, is determined (28). The watermark initial value is then modified until said interference introduced into the spectral representation of the audio signal by a modified watermark initial value after quantization, is less than or equal to the predetermined interference threshold (32).

Inventors:
HERRE JUERGEN (DE)
KULESSA RALPH (DE)
NEUBAUER CHRISTIAN (DE)
SIEBENHAAR FRANK (DE)
Application Number:
PCT/EP2002/005173
Publication Date:
May 22, 2003
Filing Date:
May 10, 2002
Export Citation:
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Assignee:
FRAUNHOFER GES FORSCHUNG (DE)
HERRE JUERGEN (DE)
KULESSA RALPH (DE)
NEUBAUER CHRISTIAN (DE)
SIEBENHAAR FRANK (DE)
International Classes:
G10L19/018; G10L19/02; G11B20/00; (IPC1-7): G11B20/00; H04H1/00
Domestic Patent References:
WO1997033391A11997-09-12
WO2001099109A12001-12-27
Foreign References:
DE19938095A12001-03-01
Other References:
NEUBAUER C ET AL: "Continuous steganographic data transmission", INFORMATION HIDING. SECOND INTERNATIONAL WORKSHOP, IH'98. PROCEEDINGS, INFORMATION HIDING. SECOND INTERNATIONAL WORKSHOP, IH'98. PROCEEDINGS, PORTLAND, OR, USA, 14-17 APRIL 1998, 1998, Berlin, Germany, Springer-Verlag, Germany, pages 208 - 217, XP002224416, ISBN: 3-540-65386-4
ROBERTA EKLUND: "Audio Watermarking Techniques", INTERNET ARTICLE, XP002224417, Retrieved from the Internet [retrieved on 20021007]
JONGWON SEOK ET AL: "A novel audio watermarking algorithm for copyright protection of digital audio", ETRI JOURNAL, JUNE 2002, ELECTRON. & TELECOMMUN. RES. INST., TAEJON, SOUTH KOREA, vol. 24, no. 3, pages 181 - 189, XP002224418, ISSN: 1225-6463
R.A. GARCIA: "Digital Watermarking of audio signals using a psychoacoustic auditory model and spread spectrum theory", AES 107TH CONVENTION, PREPRINT 5073, 24 September 1999 (1999-09-24) - 27 September 1999 (1999-09-27), New York, pages 1 - 42, XP002224419, Retrieved from the Internet [retrieved on 20021007]
BONEY L ET AL: "Digital Watermarks for Audio Signals", PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON MULTIMEDIA COMPUTING AND SYSTEMS, LOS ALAMITOS, CA, US, 17 June 1996 (1996-06-17), pages 473 - 480, XP002160496
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