Patent ID: 8867781
Filing Date: 2014-10-21
Classification: G06T,H04N

Abstract:
1. A two level cross-correlation based system for watermarking continuous digital media, comprising: a) an application control module (ACM) for: b) a media encoder for receiving uncompressed media data from a media source and providing compressed media frames (F c) a software retrieval module (SRM) for retrieving said compressed media frames (F d) a first signature buffer for buffering a previously generated signature (S e) a second signature buffer operatively connected to said first signature buffer for buffering a currently generated unique digital signature (S f) a third signature buffer for storing a predefined initial signature (S g) a 2:1 multiplexer (MUX) for receiving an input from said first signature buffer (S h) frame switching means operatively connected to said SRM and to said FSV for controlling the flow of said F i) signature switching means operatively connected to said 2:1 MUX and to said SSV for controlling the flow of said output from said 2:1 MUX; j) a signature generator operatively connected to said frame switching means, to said signature switching means, and to said ACM, for generating a unique digital signature (S wherein, if both said frame switching means and said signature switching means are “off”, then a “null signature” is generated and said null signature is provided to said second signature buffer if said enable/disable control signal is set to “enable”, said signature generator providing no signature if said enable/disable control signal is set to “disable”; and, k) an encryptor for receiving said unique digital signature (S