Electronic watermark embedding apparatus and method and a format conversion device having a watermark embedding function

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• image information amount detecting means for detecting an amount of information of the image data in which the electronic watermark is to be embedded and for outputting a signal representing the detected image information amount;
• and
• encoding information detecting means for detecting encoding information from the image data in which the electronic watermark has been embedded and which has been encoded, and feeding the detected encoding information back to the electronic watermark embedding means,
• said electronic watermark embedding means controlling a position of the image data at which the electronic watermark data is embedded in the image data according to the image information amount signal detected by said image data amount detecting means and the encoding information detected by said encoding information detecting means and fed back to the electronic watermark embedding means.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• image information amount detecting means for detecting an amount of information of the image data in which the electronic watermark is to be embedded and for outputting a signal representing the detected image information amount;
• and
• encoding information detecting means for detecting encoding information from the image data in which the electronic watermark has been embedded and which has been encoded, and feeding the detected encoding information back to the electronic watermark embedding means,
• said electronic watermark embedding means controlling strength of the electronic watermark data to be embedded in the image data according to the image information amount signal detected by said image data amount detecting means and the encoding information detected by said encoding information detecting means and fed back to the electronic watermark embedding means.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• image information amount detecting means for detecting an amount of information of the image data in which the electronic watermark has been embedded and for outputting a signal representing the detected image information amount;
• and
• encoding information detecting means for detecting encoding information from the image data in which the electronic watermark has been embedded and which has been encoded, and feeding the detected encoding information back to the electronic watermark embedding means,
• said electronic watermark embedding means controlling an amount of the electronic watermark data to be embedded in the image data according to the image information amount signal detected by said image data amount detecting means and the encoding information detected by said encoding information amount detecting means and fed back to the electronic watermark embedding means.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• image information amount detecting means for detecting an amount of information of the image data in which the electronic watermark has been embedded and for outputting a signal representing the detected image information amount;
• and
• encoding information detecting means for detecting encoding information of the image data in which the electronic watermark has been embedded and which has been encoded, and feeding the detected encoding information back to the electronic watermark embedding means,
• said electronic watermark embedding means controlling a position of the image data at which the electronic watermark data is embedded in the image data according to the image information amount signal and the encoding information detected by said image information amount detecting means and fed back to the electronic watermark embedding means.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• image information amount detecting means for detecting an amount of information of the image data in which the electronic watermark has been embedded and for outputting a signal representing the detected image information amount;
• and
• encoding information detecting means for detecting encoding information from the image data in which the electronic watermark has been embedded and which has been encoded, and feeding the detected encoding information back to the electronic watermark embedding means,
• said electronic watermark embedding means controlling strength of the electronic watermark data to be embedded in the image data according to the image information amount signal detected by said image information amount detecting means and the encoding information detected by said image information detecting means and fed back to the electronic watermark embedding means.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• format converting means for converting the image data into data of an MPEG2 format;
• and
• converted image information detecting means for detecting an amount of information of the image data converted by said format converting means into data of an MPEG2 format and for outputting a signal representing the converted image information, and feeding the converted image information signal back to the electronic watermark embedding means;
• said electronic watermark embedding means controlling at least one of an amount of the electronic watermark data to be embedded in the image data and strength thereof according to the converted image information signal fed back to the electronic watermark embedding means.

A format converter for converting a format of the image data into an MPEG2 format, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• format converting means for converting the image data into data of an MPEG2 format;
• and
• converted image information detecting means for detecting an amount of information of the image data converted by said format converting means into data of an MPEG2 format and for outputting a signal representing the converted image information, and feeding the converted image information signal back to the electronic watermark embedding means;
• said electronic watermark embedding means controlling at least one of an amount of the electronic watermark data to be embedded in the image data and strength thereof according to the converted image information signal fed back to the electronic watermark embedding means.

An electronic watermark embedding method of embedding an electronic watermark in image data, comprising the steps of:

• generating electronic watermark data of an electronic watermark to be embedded in the image data;
• embedding the electronic watermark in the image data using an electronic watermark embedding means;
• converting the image data in which the electronic watermark data has been embedded into data of an MPEG2 format;
• detecting an amount of information of the image data converted into data of the MPEG2 format and outputting a signal representing the detected amount of information to be fed back to the electronic watermark embedding means;
• and
• controlling at least one of an amount of the electronic watermark data to be embedded in the image data and strength thereof according to the detected amount of information of the image data fed back to the electronic watermark embedding means.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• and
• format converting means for converting the image data into data of an MPEG2 format,
• said format converting means comprising image information amount detecting means for detecting an amount of information of the image data converted into data of an MPEG2 format and for outputting an image information amount signal, and feeding the image information amount signal back to the electronic watermark embedding means, wherein
• said electronic watermark embedding means controlling at least one of an amount of the electronic watermark data to be embedded in the image data and strength thereof according to the image information amount signal fed back to the electronic watermark embedding means.

A format converter for converting a format of image data into an MPEG2 format, said format converter operating in cooperation with:

• electronic watermark data generating means for generating data of an electronic watermark to be embedding in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• format converting means for converting the image data into data of an MPEG2 format,
• said format converting means including image information amount detecting means for detecting an amount of information of the image data converted into data of an MPEG2 format and for outputting a signal representing the detected image information amount, and feeding the image information amount signal back to the electronic watermark embedding means;
• and
• said electronic watermark embedding means detecting a quantizing step for a high-frequency component of spatial frequency components of the image data according to the image information amount signal, fed back to the electronic watermark embedding means, and controlling at least one of an amount of the electronic watermark data to be embedded in the image data and strength thereof.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark embedding means for embedding the electronic watermark in the image data;
• and
• format converting means for converting said image data into data of an MPEG2 format,
• said format converting means including image information amount detecting means for detecting an amount of information of the image data converted into data of an MPEG2 format and for outputting a signal representing the detected image information amount, and feeding the image information amount signal back to the electronic watermark embedding means,
• said electronic watermark embedding means detecting a quantizing step for a high-frequency component of spatial frequency components of the image data according to the image information amount signal, fed back to the electronic watermark embedding means, and controlling at least one of an amount of the electronic watermark data to be embedded in the image data and strength thereof.

An electronic watermark embedding method of embedding an electronic watermark in image data, comprising the steps of:

• generating data of an electronic watermark to be embedded in the image data;
• embedding the electronic watermark in the image data using an electronic watermark embedding means;
• and
• converting the image data in which the electronic watermark has been embedded into data of an MPEG2 format,
• detecting an amount of information of the image data converted into data of an MPEG2 format and outputting a signal representing the detected image information amount to be fed back to the electronic watermark embedding means;
• and
• detecting a quantizing step for a high-frequency component of spatial frequency components of the image data according to the image information amount, fed back to the electronic watermark embedding means, and controlling at least one of an amount of the electronic watermark data to be embedded in the image data and strength thereof according to the detecting result.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark data embedding means for embedding data of the electronic watermark in the image data;
• and
• electronic watermark information amount detecting means for detecting information of the electronic watermark in the image data in which the electronic watermark has been embedded and which has been encoded and for outputting electronic watermark information, and feeding the detected electronic watermark information back to the electronic watermark data embedding means,
• said electronic watermark embedding means controlling an amount of the electronic watermark data to be embedded in the image data according to the detected electronic watermark information fed back to the electronic watermark embedding means.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedded in the image data;
• electronic watermark data embedding means for embedding data of the electronic watermark in the image data;
• and
• electronic watermark information amount detecting means for detecting information of the electronic watermark in the image data in which the electronic watermark has been embedded and which has been encoded and for outputting electronic watermark information, and feeding the detected electronic watermark information back to the electronic watermark data embedding means,
• said electronic watermark embedding means controlling a position of the image data at which the electronic watermark data is embedded in the image data according to the detected electronic watermark information fed back to the electronic watermark embedding means.

An electronic watermark embedding apparatus for embedding an electronic watermark in image data, comprising:

• electronic watermark data generating means for generating data of an electronic watermark to be embedding in the image data;
• electronic watermark data embedding means for embedding data of the electronic watermark in the image data;
• and
• electronic watermark information amount detecting means for detecting information of the electronic watermark in the image data in which the electronic watermark has been embedded and which has been encoded and for outputting electronic watermark information, and feeding the detected electronic watermark information back to the electronic watermark data embedding means,
• said electronic watermark embedding means controlling strength of the electronic watermark data to be embedded in the image data according to the detected electronic watermark information fed back to the electronic watermark embedding means.

An electronic watermark embedding method of embedding an electronic watermark in image data, comprising the steps of:

• providing data of an electronic watermark to be embedding in the image data;
• embedding the electronic watermark in the image data;
• detecting and feeding back information regarding the electronic watermark in the image data in which the electronic watermark has been embedded;
• and
• controlling at least one of an amount of the electronic watermark data to be embedded in the image data and strength thereof according to the information regarding the electronic watermark in the image data which is detected and fed back by the detecting step.