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首页> 外国专利> WATERMARK GENERATOR, WATERMARK DECODER, METHOD FOR PROVIDING A WATERMARKED SIGNAL BASED ON DISCRETE VALUED DATA AND METHOD FOR PROVIDING DISCRETE VALUED DATA IN DEPENDENCE ON A WATERMARKED SIGNAL

WATERMARK GENERATOR, WATERMARK DECODER, METHOD FOR PROVIDING A WATERMARKED SIGNAL BASED ON DISCRETE VALUED DATA AND METHOD FOR PROVIDING DISCRETE VALUED DATA IN DEPENDENCE ON A WATERMARKED SIGNAL

机译：水印生成器，水印解码器，基于离散值数据的水印信号提供方法和与水印信号相关的离散值数据提供方法

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摘要

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 includes 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, and 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.
机译：用于基于代表离散值数据的后续流值的流来提供水印信号作为后续水印系数的序列的水印生成器包括差分编码器。差分编码器被配置为将相位旋转应用于代表离散值数据的流值的当前流值或当前水印符号，当前水印符号与代表离散值数据的流值的当前流值相对应，以获得水印信号的当前水印系数。差分编码器被配置为导出作为主信号和水印信号的组合的水印信号的先前频谱系数的相位，并且提供水印信号，使得将相位旋转的相角施加到电流上。流值或当前水印符号取决于水印信号的先前频谱系数的相位。

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