Gesproken tekst vertalen, offlinefuncties, synoniemen, vervoegingen, educatieve spelletjes
Publiciteit
Registreer gratis: toegang tot meer resultaten en functies
watermark decoder
Vertaling van "watermark decoder" in Chinees
水印解码器
shows a diagram of an example of the mapping of different phase angle ranges to discrete values of discrete valued data like it is performed by the watermark decoder from Fig. 11.
显示了与图11中的水印解码器相似的方式将不同相位角范围映射到离散值数据的离散值的示例的示意图。
This object, is achieved by a watermark generator according to claim 1, a watermark decoder according to claim 11, a method for providing a watermark signal based on discrete valued data according to claim 14, a method for providing discrete valued data in dependence on a watermarked signal according to claim. 15 and a computer program according to claim 16,
该目的通过根据权利要求1的水印生成器、根据权利要求11的水印解码器、根据权利要求14基于离散值数据提供水印信号的方法、根据权利要求15根据加水印信号提供离散值数据的方法和根据权利要求16的计算机程序而实现。
In a receiver, which comprises a watermark decoder, typically the inverse of the mentioned operations for generating the watermark signal is carried out in reverse order to decode the the case that the differential encoder 208 from Fig. 2 is used in htewatermark generator to generate the watermark signal the differential decoding can be performed by
在包括水印解码器的接收器中，一般来说，所述生成水印信号的操作按水印解码的相反顺序进行。对于使用图2中的差分编码器208在水印生成器中生成水印信号的情况，差分解码可按以下方式进行：
Embodiments according to the present invention are related to a watermark generator for providing a watermark signal based on discrete valued data. Further embodiments according to the present invention relate to a watermark decoder for providing discrete valued data in dependence on a watermarked signal Further embodiments according to the 15 present invention are related to a method for providing a watermark signal based on discrete valued data. Further embodiments according to the present invention are related to a method for providing discrete valued data in dependence on a watermarked signal, Further embodiments are related to corresponding computer programs.
根据本发明的实施例涉及用于基于离散值数据提供水印信号的水印生成器。根据本发明的进一步实施例涉及用于根据加水印信号提供离散值数据的水印解码器。根据本发明的进一步实施例涉及用于基于离散值数据提供水印信号的方法。根据本发明的进一步实施例涉及用于根据加水印信号提供离散值数据的方法。进一步实施例涉及对应计算机程序。
Andere resultaten
Embodiments of the present invention create a method for generating an inaudible watermark featuring differential encoding in the time frequency domain, The watermark is shaped optimally, or at least approximately optimally or signal-adapted, considering the host audio signal to maximize the decoder performance. Moreover, the choice of the order of the symbol constellation allows to tradeoff robustness against external noise sources (i.e. better signal-to-noise ratio of the watermarked signal) versus better bit error rates.
本发明的实施例发明了一种在时频域中进行差分编码的用于生成不可感知水印的方法。所述水印的形状可根据主体音频信号选择，或者，至少大致可选，或以自适应方式选择，以将解码器的性能最大化。另外，符号群集的阶数选择可在外部噪声源鲁棒性（即，加水印信号的信噪比更高）与更高误码率之间进行折衷。
It is an idea of the present invention that a watermark signal is more robust, especially with respect to a degradation, for example, by Doppler effect, if a differential encoding of a watermark coefficients is performed such that a phase of a current watermark coefficient is based on a phase of a previous spectral coefficient of a watermarked, signal which is to be embedded in a host signal. Embodiments of the present invention combine host interference rejection with differential encoding. This concept of deriving the phase of the current watermark coefficient based on the phase of a previous spectral coefficient of the watermarked signal reduces the distortion induced by the host signal and thus improves a decoding process, for example at a decoder being configured to extract the watermark signal out of the watermarked signal.
本发明的原理在于，如果对水印系数进行差分编码，使当前水印系数的相位基于要嵌入主体信号的加水印信号的前一个频谱系数的相位，通过多普勒效应，水印信号的鲁棒性提高，特别是对退化的鲁棒性提高。本发明的实施例将主体干扰抑制与差分编码相结合。基于加水印信号的前一个频谱系数的相位导出当前水印系数的相位的这种原理减少了主体信号产生的失真，因此改善了解码过程，例如，用于从加水印信号中提取水印信号的解码器的解码过程。
A watermarking system can be viewed as a communication system. Let the bit-wise information to be transmitted be represented by a watermark signal "win", which is the desired signal. The signal wm is 'embedded' into a host signal "a" by adding the two signals (the watermark signal wm and the host signal a), obtaining a watermarked signal "awm", With respect to the watermark, the host signal can be seen as an additive distortion, This means that awm deviates from its ideal value wm, corrupting the decoding process (if the original host signal a is not known at the decoder). The signal awm is further affected by a transmission channel, in that the channel introduces distortions. Examples of transmission channels are the compression of the signal awm with an audio codec such as AAC as well as the playback, of the signal awm with a loudspeaker, its propagation in air, and its pickup with a microphone.
水印系统可被视为一种通信系统。用作为预期信号的水印信号"wm"代表要传输的比特式信息。通过添加两个信号（水印信号wm和主体信号a）而将信号wm'嵌入'主体信号"a"中，获得加水印信号"awm"。相对于水印，主体信号可被视为添加失真。这表示，awm偏离了其理想值wm，破坏了解码过程（如果原始主体信号a在解码器中未知）。信号awm进一步受到传输通道的影响，通道会造成失真。传输通道的示例为：用音频编解码器压缩信号awm，例如，AAC和回放；用扬声器压缩信号awm；信号awm在空气中的传播；以及，用麦克风拾取信号awm。
Ga naar Premium voor toegang tot miljoenen vertaalvoorbeelden, onbeperkt woorden opslaan en leren, zonder advertenties.
Synoniemen voor watermark decoder in het Engels
Woord & uitdrukking van de dag
Afbeelding van de dag
Resultaten: 7. Exact: 4. Verstreken tijd: 17 ms.
