Title:
アナログ信号への情報の埋込みおよび抽出を分布信号特徴を用いて行なう装置および方法
Document Type and Number:
Japanese Patent JP4251378
Kind Code:
B2
Abstract:
Apparatus and methods are provided for embedding or embedding digital data into an analog host or cover signal. A distributed signal feature of the cover signal in a particular domain (time, frequency or space) is calculated and compared with a set of predefined quantization values corresponding to an information symbol to be encoded. The amount of change required to modify the signal feature to the determined target quantization value is calculated and the cover signal is modified accordingly to so change the feature value over a predefined interval. Information symbols are extracted by the opposite process. In one embodiment, the predefined value is a short term autocorrelation value of the cover signal.
Inventors:
Raid Petrovic
Canaan Jemilly
Joseph M Winograd
Eric Metois
Canaan Jemilly
Joseph M Winograd
Eric Metois
Application Number:
JP55042398A
Publication Date:
April 08, 2009
Filing Date:
May 12, 1998
Export Citation:
Assignee:
Velance Corporation
International Classes:
G09C5/00; H04N1/00; G06T1/00; G10K15/02; G10L19/018; G10L25/51; H04H20/31; H04N1/387; H04N7/08; H04N7/081
Other References:
岩切宗利, 松井甲子雄,“音声符号化手順G.721によるテキストの秘匿伝送法”, 1997年暗号と情報セキュリティ・シンポジウム, 1997年 2月 1日, SCIS’97-31A,p.1-10
Rade Petrovic, Joseph M. Winograd, Kanaan Jemili and Eric Metois,“DATA HIDING WITHIN AUDIO SIGNALS”, FACTA UNIVERSITATIS SERIES: ELECTRONICS AND ENERGETICS, 1999年, VOL.12,No.2, p.103-122,URL,http://factaee.elfak.ni.ac.yu/facta9902/ilja6.pdf
Rade Petrovic, Joseph M. Winograd, Kanaan Jemili, Eric Metois, “Data Hiding within Audio Signals”, TELSIKS′99, 1999年10月, p.88-95,URL,http://ieeexplore.ieee.org/iel5/6528/17444/00804701.pdf
Rade Petrovic, Joseph M. Winograd, Kanaan Jemili and Eric Metois,“DATA HIDING WITHIN AUDIO SIGNALS”, FACTA UNIVERSITATIS SERIES: ELECTRONICS AND ENERGETICS, 1999年, VOL.12,No.2, p.103-122,URL,http://factaee.elfak.ni.ac.yu/facta9902/ilja6.pdf
Rade Petrovic, Joseph M. Winograd, Kanaan Jemili, Eric Metois, “Data Hiding within Audio Signals”, TELSIKS′99, 1999年10月, p.88-95,URL,http://ieeexplore.ieee.org/iel5/6528/17444/00804701.pdf
Attorney, Agent or Firm:
Mamoru Takada
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