METHODS AND APPARATUS FOR WATERMARKING AND DISTRIBUTING WATERMARKED CONTENT

摘要

Methods and apparatus for generating and distributing watermarked content are described. Content to be distributed is sliced into a plurality of segments, e.g., short portions. Individual segments are subjected to watermarking with multiple watermarked versions of a segment being generated. Different watermarked versions of a segment communicate different information, e.g., one or more numbers. Sets of watermarked segments corresponding to a program are supplied to a content distribution device. Based on a session number or other information corresponding to the destination of the content, the content distribution device selects watermarked segments from the sets of segments to provide to the user. The combination of segments communicates, via the watermarks, a sequence of numbers used to identify the streamed content without requiring the distribution node to perform image processing to generate the watermarks. When the segments are communicated sequentially, the watermarks can be detected and the identifying numerical sequence extracted.