Title:
透かし生成器、透かしデコーダ、離散値のデータに基づき透かし付信号を付与するための方法および透かし付信号に依存して離散値のデータを付与する方法
Document Type and Number:
Japanese Patent JP2013545121
Kind Code:
A
Abstract:
A watermark generator for providing a watermark signal as a sequence of subsequent watermark coefficients based on a stream of subsequent stream values representing discrete valued data comprises a differential encoder. The differential encoder is configured to apply a phase rotation to a current stream value of the stream values representing the discrete valued data or to a current watermark symbol, the current watermark symbol corresponding to a current stream value of the stream values representing the discrete valued data, to obtain a current watermark coefficient of the watermark signal. The differential encoder is configured to derive a phase of a previous spectral coefficient of a watermarked signal which is a combination of the host signal and the watermark signal. The differential encoder is further configured to provide the watermark signal such that a phase angle of the phase rotation applied to the current stream value or the current watermark symbol is dependent on the phase of the previous spectral coefficient of the watermarked signal.
Inventors:
Zitzmann Reinhard
Del Gardo Giovanni
Bream Tobias
Borzum Juliane
Greven-Bosch Belt
Kragero Stefan
Ice ax
Del Gardo Giovanni
Bream Tobias
Borzum Juliane
Greven-Bosch Belt
Kragero Stefan
Ice ax
Application Number:
JP2013529618A
Publication Date:
December 19, 2013
Filing Date:
September 16, 2011
Export Citation:
Assignee:
Fraunhofer Gesell Shaft Tool Forderung Del Angewanten Forschung A. Far.
International Classes:
G10L19/018; H04N1/387
Domestic Patent References:
| JP2007535699A | 2007-12-06 | |||
| JPH11110913A | 1999-04-23 | |||
| JPH10210092A | 1998-08-07 | |||
| JP2007535699A | 2007-12-06 | |||
| JPH11110913A | 1999-04-23 | |||
| JPH10210092A | 1998-08-07 |
Other References:
JPN5013010827; Ｗｅｎ-Ｙｕａｎ ＣＨＥＮ: 'ＣＯＬＯＲ ＩＭＡＧＥ ＳＴＥＧＡＮＯＧＲＡＰＨＹ ＳＣＨＥＭＥ ＵＳＩＮＧ ＤＦＴ， ＳＰＩＨＴ ＣＯＤＥＣ， ＡＮＤ ＭＯＤＩＦＩＥＤ ＤＩＦＦＥＲＥＮＴＩＡＬ ＰＨＡＳＥ-ＳＨＩＦＴ ＫＥＹＩＮ' ＡＰＰＬＩＥＤ ＭＡＴＨＥＭＡＴＩＣＳ ＡＮＤ ＣＯＭＰＵＴＡＴＩＯＮ Ｖ１９６ Ｎ１, 20080114, Ｐ４０-５４, ＥＬＳＥＶＩＥＲ
JPN5013010827; Ｗｅｎ-Ｙｕａｎ ＣＨＥＮ: 'ＣＯＬＯＲ ＩＭＡＧＥ ＳＴＥＧＡＮＯＧＲＡＰＨＹ ＳＣＨＥＭＥ ＵＳＩＮＧ ＤＦＴ， ＳＰＩＨＴ ＣＯＤＥＣ， ＡＮＤ ＭＯＤＩＦＩＥＤ ＤＩＦＦＥＲＥＮＴＩＡＬ ＰＨＡＳＥ-ＳＨＩＦＴ ＫＥＹＩＮ' ＡＰＰＬＩＥＤ ＭＡＴＨＥＭＡＴＩＣＳ ＡＮＤ ＣＯＭＰＵＴＡＴＩＯＮ Ｖ１９６ Ｎ１, 20080114, Ｐ４０-５４, ＥＬＳＥＶＩＥＲ
JPN5013010827; Ｗｅｎ-Ｙｕａｎ ＣＨＥＮ: 'ＣＯＬＯＲ ＩＭＡＧＥ ＳＴＥＧＡＮＯＧＲＡＰＨＹ ＳＣＨＥＭＥ ＵＳＩＮＧ ＤＦＴ， ＳＰＩＨＴ ＣＯＤＥＣ， ＡＮＤ ＭＯＤＩＦＩＥＤ ＤＩＦＦＥＲＥＮＴＩＡＬ ＰＨＡＳＥ-ＳＨＩＦＴ ＫＥＹＩＮ' ＡＰＰＬＩＥＤ ＭＡＴＨＥＭＡＴＩＣＳ ＡＮＤ ＣＯＭＰＵＴＡＴＩＯＮ Ｖ１９６ Ｎ１, 20080114, Ｐ４０-５４, ＥＬＳＥＶＩＥＲ
Attorney, Agent or Firm:
Hidetoshi Ueba
Takao Matsuyama
Go Sakane
Kawakami Keiko
Takao Matsuyama
Go Sakane
Kawakami Keiko