Patent application number | Description | Published |
20090257618 | DATA PROCESSING APPARATUS AND METHOD - A data processing apparatus registers an image encoded with a two-dimensional water mark pattern. The water mark includes for each image frame a water mark frame pattern of water mark blocks. The water mark pattern includes plural regions each including one water mark block selected from a predetermined set of possible water mark blocks based on a key sequence. The key sequence provides a predetermined sequence of selected water mark blocks to form the water mark pattern of each frame to provide a predetermined sequence of water marked frames. The data processing apparatus includes a block match processor generating block match probabilities including for each region of a current frame of the water marked image a probability surface of possible distortion vectors for each possible water mark block of the set of possible water marked blocks that may have been added to that region of the image frame. | 10-15-2009 |
20100017614 | ENCODING AND DETECTING APPARATUS - An encoding data processing apparatus generates a video material item marked copy by embedding a payload data word into the video material item. The video material item includes plural video frames. A code word generator generates a water mark code word from the payload data word and reads data representing the water mark code word into a shuffle data store. A shuffle processor generates pseudo randomly at least one address within an address space of the shuffle data store for each video frame and reads data representing part or parts of the water mark code word out from the data store at locations identified by the pseudo randomly generated address. A data embedding processor receives the video material item and embeds the data representing the part or parts of the water mark code word read out from the shuffle data store for each frame into a corresponding frame of the video material item. | 01-21-2010 |
20100226425 | ENCODING AND DETECTING APPARATUS - An encoding data processor generates a video material item marked copy by representing a payload data word as a code word and embedding the code word into a copy of the video material item. A preprocessor divides the payload word into plural parts, forms plural initial values from the plural parts, each initial value formed by adding parts of the payload data word to each initial value successively starting with the first part added to the first initial value, and adds the first and second to the second initial value so each subsequent initial value includes all parts of the payload data word of the previous initial values and a new part of the payload data word. An encryption processor receives each initial value and generates an encrypted data stream using a payload encryption key. A combiner combines the encrypted payload data word with the video material item. | 09-09-2010 |