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    • 3. 发明授权
    • Audio content digital watermark detection
    • 音频内容电子水印检测
    • US08055505B2
    • 2011-11-08
    • US12140750
    • 2008-06-17
    • Ryuki TachibanaNorishige Morimoto
    • Ryuki TachibanaNorishige Morimoto
    • G10L21/00
    • G10L19/097
    • Digital watermark detection apparatus including detection units which calculate detected values of watermark signals by use of keys for PCM data of channels of audio content, a plurality of units which add the detected values corresponding to each of the channels and each of the keys for each possible combination of the respective channels and the respective keys, and a unit which selects and outputs one adding result from the respective adding results by the plurality of detected value adding units. Moreover, it includes units which accumulate the detected values in accumulation cycles different from one another to restore messages embedded as digital watermarks from the accumulated detected values, and perform boundary detection of the audio contents to detect the audio contents in which the digital watermarks are embedded, and a detection result output unit which synthesizes and outputs respective processing results by the message restoration units.
    • 数字水印检测装置,包括利用音频内容的频道的PCM数据的密钥计算水印信号的检测值的检测单元,多个单元,其添加与每个信道对应的检测值,以及每个可能的每个信道 各个通道和各个键的组合,以及由多个检测值相加单元从各个相加结果中选择并输出一个相加结果的单元。 此外,它包括在累积循环中累积检测值不同的单元,以恢复从累积的检测值嵌入作为数字水印的消息,并且执行音频内容的边界检测以检测其中嵌入了数字水印的音频内容 以及检测结果输出单元,其通过消息恢复单元合成并输出各个处理结果。
    • 6. 发明授权
    • Alteration detection apparatus and method thereof
    • 改变检测装置及其方法
    • US06963655B1
    • 2005-11-08
    • US09548377
    • 2000-04-12
    • Satoko TonegawaNorishige MorimotoKohichi Kamijoh
    • Satoko TonegawaNorishige MorimotoKohichi Kamijoh
    • H04N1/387G06K9/00G06T1/00
    • H04N1/32144
    • The present invention is directed to the detection of what part of an image alteration was added to by embedding an electronic watermark in the image. More particularly, embedding part 30 renders as pairs two each of DCT blocks of luminance component Y of an image, randomly selects, by using a random number, mutually corresponding DCT coefficients from each DCT block contained in the pairs, and manipulates so that the relationship among these DCT coefficients represent data according to a certain rule, and then embeds the data. If alteration is added to this image, the DCT coefficients contained in the pairs in the altered part do not observe the above rule and represent different values from the original data. Extraction part 40 extracts data from the image, and makes decision by majority to estimate the initially embedded data to detect and display the pairs from which different data form the estimated data was extracted as those to which alteration was added.
    • 本发明涉及通过在图像中嵌入电子水印来检测添加了图像变化的哪一部分。 更具体地说,嵌入部分30将图像的亮度分量Y的DCT块中的每一个呈现成对,通过使用随机数来随机地选择来自包含在该对中的每个DCT块的相互对应的DCT系数,并且操作使得关系 在这些DCT系数中,根据某个规则表示数据,然后嵌入数据。 如果对该图像添加了改变,则包含在改变部分中的对中的DCT系数不遵守上述规则并且表示与原始数据不同的值。 提取部分40从图像中提取数据,并且通过多数判断来估计初始嵌入的数据以检测和显示从其中提取不同数据形式的估计数据的对,作为添加了变化的数据。
    • 7. 发明申请
    • Audio content digital watermark detection
    • 音频内容电子水印检测
    • US20050234728A1
    • 2005-10-20
    • US11087298
    • 2005-03-23
    • Ryuki TachibanaNorishige Morimoto
    • Ryuki TachibanaNorishige Morimoto
    • G10L11/00G10L21/00
    • G10L19/097
    • Digital watermark detection apparatus including detection units which calculate detected values of watermark signals by use of keys for PCM data of channels of audio content, a plurality of units which add the detected values corresponding to each of the channels and each of the keys for each possible combination of the respective channels and the respective keys, and a unit which selects and outputs one adding result from the respective adding results by the plurality of detected value adding units. Moreover, it includes units which accumulate the detected values in accumulation cycles different from one another to restore messages embedded as digital watermarks from the accumulated detected values, and perform boundary detection of the audio contents to detect the audio contents in which the digital watermarks are embedded, and a detection result output unit which synthesizes and outputs respective processing results by the message restoration units.
    • 数字水印检测装置,包括利用音频内容的频道的PCM数据的密钥计算水印信号的检测值的检测单元,多个单元,其添加与每个信道对应的检测值,以及每个可能的每个信道 各个通道和各个键的组合,以及由多个检测值相加单元从各个相加结果中选择并输出一个相加结果的单元。 此外,它包括在累积循环中累积检测值不同的单元,以恢复从累积的检测值嵌入作为数字水印的消息,并且执行音频内容的边界检测以检测其中嵌入了数字水印的音频内容 以及检测结果输出单元,其通过消息恢复单元合成并输出各个处理结果。