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| Number | Title | Issue Date |
| 7319775 | Wavelet domain watermarks A wavelet domain watermark encoder and decoder embed and detect auxiliary signals in a media signal, such as a still image, video or audio signal. A watermark orientation signal is embedded in a wavelet decomposed signal to facilitate detection of the watermark in a... | 01/15/2008 |
| 6771797 | Watermarks carrying content dependent signal metrics for detecting and characterizing signal alteration The invention provides methods and systems for detecting and characterizing alterations of media content, such as images, video and audio signals, using watermark messages to carry signal metrics. By comparing signal metrics extracted from the watermark to signal me... | 08/03/2004 |
| 6512837 | Watermarks carrying content dependent signal metrics for detecting and characterizing signal alteration The invention provides methods and systems for detecting and characterizing alterations of media content, such as images, video and audio signals, using watermark messages to carry signal metrics. By comparing signal metrics extracted from the watermark t... | 01/28/2003 |
| 6385329 | Wavelet domain watermarks A wavelet domain watermark encoder and decoder embed and detect auxiliary signals in a media signal, such as a still image, video or audio signal. A watermark orientation signal is embedded in a wavelet decomposed signal to facilitate detection of the wat... | 05/07/2002 |
