Search results for: ZNAKOWANIE WRAŻLIWE
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Robustness analysis of watermarking-based dtd algorithm under time-variable echo conditions
PublicationA novel double-talk detection (DTD) algorithm based on techniques similar to those used for audio signal watermarking was introduced by the authors. The application of the described DTD algorithm within acoustic echo cancellation system is presented. The problem of DTD robustness to time-varying conditions of acoustic echo path is discussed and explanation as to why such conditions occur in practical situations is provided. The...
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Dwupoziomowe cyfrowe znakowanie obrazów nieruchomych.
PublicationPrzedstawiono metodę cyfrowego znakowania obrazów nieruchomych na dwóch poziomach. Cyfrowy znak wodny wprowadzony na pierwszym poziomie jest znakiem wrażliwym, pozwalającym na szybkie wykrycie manipulacji na obrazie. Znakowanie na drugim poziomie jest znakowaniem silnym (odpornym) w tym sensie, że jego usunięcie związane jest z tak dużym zniekształceniem obrazu, że staje się on bezużytecznym. Znakowanie to jest zabezpieczone kodem...
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Performance of Watermarking-based DTD Algorithm Under Time-varying Echo Path Conditions
PublicationA novel double-talk detection (DTD) algorithm based on techniques similar to those used for audio signal watermarking was introduced by the authors. The application of the described DTD algorithm within acoustic echo cancellation system is presented. The problem of DTD robustness to time-varying conditions of acoustic echo path is discussed and explanation as to why such conditions occur in practical situations is provided. The...