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WATERMARK SYNCHRONIZATION SYSTEM AND METHOD FOR EMBEDDING IN FEATURES TOLERANT TO ERRORS IN FEATURE ESTIMATES AT RECEIVER
WATERMARK SYNCHRONIZATION SYSTEM AND METHOD FOR EMBEDDING IN FEATURES TOLERANT TO ERRORS IN FEATURE ESTIMATES AT RECEIVER
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机译:嵌入到容忍特征估计误差的特征中的水印同步系统和方法
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摘要
The present invention is directed to a system that includes a signal feature estimator module configured to derive a plurality of signal feature estimate values from a received signal. An inner symbol alignment decoder is coupled to the signal feature estimator module. The inner symbol alignment decoder is configured to generate N probability vectors from the plurality of signal feature estimate values using a predetermined marker vector. N is an integer estimate of a number of symbols in a codeword corresponding to an watermark message that may or may not be embedded in the received signal. An outer soft-input error correction decoder is coupled to the inner decoder. The outer decoder performs a series computations and generates an estimated watermark message based on the N probability vectors. The watermark message is used to communicate data and/or to authenticate the received signal.
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