Wyniki wyszukiwania dla: WATERMARKING TECHNIQUES

• IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES

  Czasopisma

  ISSN: 0018-9480 , eISSN: 1557-9670

• A double-talk detector using audio watermarking

  Publikacja

  • G. Szwoch
  • A. Czyżewski
  • A. Ciarkowski

  - JOURNAL OF THE AUDIO ENGINEERING SOCIETY - Rok 2009

  a novel approach to double-talk detection in the acoustic echo canceler is proposed. a hidden signature is embedded into the arriving signal, using the echo-hiding method. next detection of the presence of this signature in the microphone signal is performed. the results of the signature detection may be used by the acoustic echo canceler to stop or restart the adaptation process.

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• Comments on ''an SVD-based watermarking scheme for protecting rightful ownership''

  Publikacja

  • R. Rykaczewski

  - IEEE TRANSACTIONS ON MULTIMEDIA - Rok 2007

  W pracy wykazano, że algorytm zaproponowany w komentowanym artykule nie ma wartości praktycznej, gdyż charakteryzuje się bardzo dużym prawdopodobieństwem fałszywej akceptacji.

• Quality Evaluation of Novel DTD Algorithm Based on Audio Watermarking

  Publikacja

  • A. Ciarkowski
  • A. Czyżewski

  - Rok 2011

  Echo cancellers typically employ a doubletalk detection (DTD) algorithm in order to keep the adaptive filter from diverging in the presence of near-end speech signal or other disruptive sounds in the microphone signal. A novel doubletalk detection 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...

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• Wideochirurgia i Inne Techniki Maloinwazyjne

  Czasopisma

  ISSN: 1895-4588 , eISSN: 2299-0054

• Reversible Video Stream Anonymization for Video Surveillance Systems Based on Pixels Relocation and Watermarking

  Publikacja

  • J. Cichowski
  • A. Czyżewski

  - Rok 2013

  A method of reversible video image regions of interest anonymization for applications in video surveillance systems is described. A short introduction to theanonymization procedures is presented together with the explanation of its relation to visual surveillance. A short review of state of the art of sensitive data protection in media is included. An approach to reversible Region of Interest (ROI) hiding in video is presented,...

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• Performance of Watermarking-based DTD Algorithm Under Time-varying Echo Path Conditions

  Publikacja

  • A. Ciarkowski
  • A. Czyżewski

  - Rok 2010

  A 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...

• Robustness analysis of watermarking-based dtd algorithm under time-variable echo conditions

  Publikacja

  • A. Ciarkowski
  • A. Czyżewski

  - Rok 2010

  A 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...

• Techniques & Culture

  Czasopisma

  ISSN: 0248-6016 , eISSN: 1952-420X

• TECHNIQUES IN NEUROSURGERY

  Czasopisma

  ISSN: 1077-2855