Title:
AUDIO WATERMARKING VIA PHASE MODIFICATION
Document Type and Number:
WIPO Patent Application WO/2016/115483
Kind Code:
A3
Abstract:
An audio watermarking system conveys information using an audio channel by modulating an audio signal to produce a modulated signal by embedding additional information into the audio signal. Modulating the audio signal includes segmenting the audio signal into overlapping time segments using a non-rectangular analysis window function produce a windowed audio signal, processing the windowed audio signal for a time segment to produce frequency coefficients representing the windowed time segment and having phase values and magnitude values, selecting one or more of the frequency coefficients, modifying phase values of the selected frequency coefficients using the additional information to map the phase values onto a known phase constellation, and processing the frequency coefficients including the modified phase values to produce the modulated signal.
Inventors:
HARDWICK JOHN C (US)
GRIFFIN DANIEL W (US)
GRIFFIN DANIEL W (US)
Application Number:
PCT/US2016/013639
Publication Date:
September 09, 2016
Filing Date:
January 15, 2016
Export Citation:
Assignee:
HARDWICK JOHN C (US)
GRIFFIN DANIEL W (US)
GRIFFIN DANIEL W (US)
International Classes:
G10L19/02; G10L19/018; G10L19/032
Foreign References:
| US20080027729A1 | 2008-01-31 | |||
| US20140142958A1 | 2014-05-22 | |||
| US20070014428A1 | 2007-01-18 | |||
| US20130218314A1 | 2013-08-22 | |||
| US20050212930A1 | 2005-09-29 | |||
| US5388181A | 1995-02-07 | |||
| US20150340045A1 | 2015-11-26 |
Attorney, Agent or Firm:
HAYDEN, John F. (P.O. Box 1022Minneapolis, Minnesota, US)
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