Audio watermark embedding technique applying auditory stream segregation: "G-encoder mark," extractable by mobile phone

We are developing audio watermarking techniques which enable extraction of embedded data by cell phones. For this purpose data must be embedded into frequency ranges where the auditory response is prominent, and therefore data embedding will cause large amounts of auditory noise. Previously we have...

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Bibliographic Details
Published in:Electronics and communications in Japan 2009-12, Vol.92 (12), p.1-12
Main Author: Modegi, Toshio
Format: Article
Language:English
Subjects:
audio watermark
auditory stream segregation
contactless extraction
Extraction
Frequency ranges
mobile phone
Noise
noise reduction
Proposals
Segregations
stereo
Streams
Telephones
Watermarking
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Summary:We are developing audio watermarking techniques which enable extraction of embedded data by cell phones. For this purpose data must be embedded into frequency ranges where the auditory response is prominent, and therefore data embedding will cause large amounts of auditory noise. Previously we have proposed applying a two‐channel stereo play‐back feature, in which noise generated by a data‐embedded left‐channel signal will be reduced by the other right‐channel signal. However, this proposal has the practical problem of restricting the location of the extracting terminal. In this paper, we propose to synthesize the noise‐reducing right‐channel signal with the left‐channel signal, which reduces noises completely by making use of the auditory stream segregation phenomenon in human hearing. This new proposal makes the noise‐reducing right‐channel signal unnecessary and supports monaural play‐back operation. We also propose a wide‐band embedding method causing dual auditory stream segregation, which makes possible data embedding in the entire public phone frequency range, and also stable extraction by 3‐G mobile phones. When using this method, the extraction precision becomes greater than that of the previously proposed method, and the quality degradation of the embedded signals is reduced. We present a survey of our newly proposed method, together with a comparison of experimental results comparing the new method and the previously proposed method. © 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 92(12): 1–12, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecj.10245
ISSN:1942-9533
1942-9541
DOI:10.1002/ecj.10245