An input content signal--representing audio or video--is encoded to hide plural-bit auxiliary data therein. The process generates an intermediate signal that is a function of (a) the plural-bit auxiliary data, and (b) data related to human perception attributes of the content signal. This intermediate...http://www.google.com.tw/patents/US6266430?utm_source=gb-gplus-share專利 US6266430 - Audio or video steganography
