Patent ID: 8990844
Filing Date: 2015-03-24
Classification: G06T,H04N

Abstract:
1. A method of providing an interactive service related to a content, the method comprising: receiving the content having watermarks, wherein the watermarks are inserted in audio or video frames of the contents, wherein the watermarks carry channel information related to the contents, and content information having URL information for additional data for the interactive service of the content, wherein a watermark in one of the frames includes a first-level watermark and a second-level watermark as an extension for the first-level watermark, wherein the first-level watermark includes a CP (Content Provider) identifier and a first extension indicator, wherein the CP identifier identifies a provider of the content, wherein the first extension indicator indicates whether the first-level watermark has extension, wherein the second-level watermark includes a content identifier and a timestamp, wherein the content identifier identifies the content, wherein the timestamp includes timing information for the content; extracting the first-level watermark from the one of the frames to obtain information in the first-level watermark; extracting the second-level watermark based on the first extension indicator to obtain information in the second-level watermark; providing the interactive service of the content based on the CP identifier, the content identifier and the timestamp.