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    • 5. 发明申请
    • CONTENT MANAGEMENT BASED ON DITHER-LIKE WATERMARK EMBEDDING
    • 基于类似水印嵌入的内容管理
    • WO2016028934A1
    • 2016-02-25
    • PCT/US2015/045960
    • 2015-08-19
    • VERANCE CORPORATION
    • PETROVIC, RadeZHAO, JianWINOGRAD, Joseph, M.
    • H04N21/2389H04N21/8358
    • G06T1/0028G06F21/16G06K9/00744G06T1/005G06T1/0085G06T2201/005G06T2201/0065H04N5/08H04N19/467H04N21/00H04N21/4307H04N21/4627H04N21/8358
    • Methods, devices and computer program products allow embedding and detection of watermarks into and from a multimedia content. One watermark embedding method includes selecting a content segment that lacks inherent features for embedding of watermarks without producing perceptible artifacts, and obtaining a first dither pattern corresponding to a first watermark symbol of a watermark symbol alphabet, where each symbol is associated with a particular dither pattern. Further, each particular dither pattern, upon combination with the multimedia content segment that lacks inherent features, produces a composite content segment without perceptible artifacts. By combining the first dither pattern with the multimedia content segment that lacks inherent features, a first composite content segment with the first embedded watermark symbol is produced. The detection of watermarks messages can be carried out quickly by examining a small portions of the multimedia because even the featureless content segments include embedded watermarks.
    • 方法,设备和计算机程序产品允许嵌入和检测多媒体内容中的水印。 一种水印嵌入方法包括:选择缺乏用于嵌入水印的固有特征的内容片段,而不会产生可察觉的假象,以及获得对应于水印符号字母表的第一水印符号的第一抖动图案,其中每个符号与特定抖动图案相关联 。 此外,每个特定抖动图案在与缺乏固有特征的多媒体内容段组合时,产生不具有可感知伪像的复合内容段。 通过将第一抖动模式与缺乏固有特征的多媒体内容段组合,产生具有第一嵌入水印符号的第一复合内容段。 水印消息的检测可以通过检查多部分的多媒体来快速地执行,因为即使没有特征的内容片段也包括嵌入的水印。
    • 7. 发明申请
    • EXTRACTING AND ENHANCING A WATERMARK SIGNAL FROM AN OUTPUT SIGNAL OF A WATERMARKING ENCODER
    • 从WATERMARKING编码器的输出信号中提取和增强水印信号
    • WO2015085026A1
    • 2015-06-11
    • PCT/US2014/068485
    • 2014-12-04
    • THE TELOS ALLIANCE
    • BLESSER, Barry
    • G10L19/018
    • G06T1/0021G06K9/52G06T2201/0065G06T2207/20056G06T2207/20224G10L19/018H04N19/467
    • A device for extracting a watermark signal from an output signal of a watermarking encoder in which the output signal includes an input signal portion corresponding to an input signal to the watermarking encoder and a watermark signal portion corresponding to the watermark signal includes an input configured to receive the input signal and the output signal. The device further includes an adjustment signal generator configured to generate a gain adjustment signal and a delay adjustment signal based on the input signal and the output signal, a gain and delay adjustor configured to adjust gain and delay of the output signal or the input signal based on the gain adjustment signal and the delay adjustment signal, respectively, to generate an adjusted output signal or an adjusted input signal, respectively, and an output configured to transmit a difference between the input signal and the adjusted output signal or a difference between the adjusted input signal and the output signal as the watermark signal.
    • 一种用于从水印编码器的输出信号中提取水印信号的装置,其中输出信号包括对应于水印编码器的输入信号的输入信号部分和对应于水印信号的水印信号部分包括被配置为接收 输入信号和输出信号。 该装置还包括调整信号发生器,其被配置为基于输入信号和输出信号产生增益调整信号和延迟调整信号;增益和延迟调整器,被配置为基于输出信号或输入信号调整增益和延迟 在增益调整信号和延迟调整信号上分别产生调整后的输出信号或经调整的输入信号,以及输出,被配置为发送输入信号和调整后的输出信号之间的差值, 输入信号和输出信号作为水印信号。