Patent ID: 6266430
Filing Date: 2001-07-24
Classification: G06Q,G06T,G07C,G07D,G07F,G10L,G11B,H04B,H04N

Abstract:
A method of processing audio or video data, comprising:providing input content data, the content data representing audio or video and comprising plural samples, each having a value;providing plural symbol auxiliary data that is to be steganographically encoded within the content data, to yield encoded content data;receiving first data related to human perception attributes of the content data;generating intermediate data that is a function of said plural symbol auxiliary data and said first data, the intermediate signal including an element corresponding to each of plural of the content data samples;steganographically encoding the content data with the auxiliary data by changing the values of samples in a version of the input content data in accordance with elements of the intermediate signal corresponding thereto, thereby yielding the encoded content data;wherein there exists first and second neighboring samples in the encoded content data:both of which samples are encoded in accordance with a first symbol of the auxiliary data;the first sample of which is additionally encoded in accordance with a second, different symbol of the auxiliary data; andthe second sample of which is additionally encoded in accordance with a third, different symbol of the auxiliary data.