Patent ID: 6512835
Filing Date: 2003-01-28
Classification: G06T,G09C,H04N

Abstract:
A broadcast system comprising:a storage apparatus in which commercial media data is stored; an encoder for hiding in said commercial media data, message data used to count the number of broadcasts of said commercial media data; and a broadcast apparatus for broadcasting said commercial media data with said message data hidden therein, wherein: said message data is dispersively hidden in said commercial media data based on the data in said message data for counting, in which media data is expressed as a media array while message data is expressed as a message array, and in which the elements of said message array are dispersively hidden in said media array based on a state value specifying a particular array element of said media array; and (a) means for determining the j-th (j&gE;0) state value; (b) means for determining (j+1)-th state value based on said j-th state value, the array element of said media array indicated by the j-th state value, and the array elements of said message array; and (c) means for hiding data with respect to the array element of said media array indicated by said (j+1)-th state value.