The present invention generally relates to digital watermarking and steganography. In one implementation, a method is provided including acts of receiving a media signal comprising a steganographic signal redundantly embedded therein; selecting a subset of the media signal for steganographic signal detection,...http://www.google.com.tw/patents/US7574014?utm_source=gb-gplus-share專利 US7574014 - Digital watermark detection utilizing host carrier information
