Patent ID: 8369688
Filing Date: 2013-02-05
Classification: G06T,G10L,H04N

Abstract:
1. A detection apparatus that detects unauthorized use of a first content in a second content that includes at least a portion of the first content, the detection apparatus comprising: a detection unit operable to detect from the second content one or more watermarks embedded in the first content; a first judging unit operable to judge whether values held by the detected watermarks and one or more past watermarks detected in the past follow a first rule, the first rule showing that the values should vary according to a sequential order on a playback time-line; a second judging unit operable to judge whether a first total count is not less than a first threshold when the first judging unit has judged affirmatively, the first total count being a total count of the detected watermarks and the past watermarks; and a playback control unit operable to obstruct a normal playback of the second content when the second judging unit has judged affirmatively, wherein the detection unit divides the second content into two or more playback blocks each having a prescribed length, and detects the watermarks from the playback blocks one by one, wherein the values held by the watermarks are counter values generated by a counter, wherein the detection unit detects the counter values from the playback blocks, wherein the first judging unit judges whether the counter values held by the detected watermarks and the past watermarks follow the first rule, wherein the second judging unit includes: wherein the playback control unit obstructs the normal playback of the second content when the consecutiveness judging subunit has judged affirmatively, wherein the second judging unit further includes: wherein the comparison subunit initializes the comparison value stored in the comparison value storage subunit when judging that the comparison value does not coincide with any of the counter values.