Abstract: A frequency domain active noise cancellation system and method are provided that achieves superior active reduction of offending noise sources. The frequency-domain active noise cancellation identifies and cancels one or more of the strongest relatively narrow frequency bands in the power spectra of the offending sound sources.
Abstract: A system and method for embedding and retrieving covert data in overt media. The covert data is imperceptibly embedded into overt media, such as an image, using techniques such as time domain and frequency domain embedding, to generate embedded media The embedded media may be decoded by capturing an image of the embedded media using a smartphone or the like, and then decoding the embedded media to obtain the covert data. The covert data may be used in standalone fashion, such as for authentication, or may be looked up in a database or the like to obtain additional information such as promotional and advertising information.