Patent ID: 8341671
Filing Date: 2012-12-25
Classification: H04L,H04N

Abstract:
1. A supplementary information server for providing a supplementary information associated with a specific broadcast program on a broadcast content, the supplementary information server comprising: a broadcasting receiving unit for receiving the broadcast content; a synchronization information unit for storing a synchronization information of the supplementary information associated with the specific broadcast program; a video comparison unit for comparing screens of the broadcast content with a previously stored scene change screen of the specific broadcast program and setting a start time of the specific broadcast program; a parsing unit configured to convert the synchronization information into vector values, wherein the video comparison unit is configured to compare the vector values of the broadcast content and the vector values of the synchronization information to a critical value; and a supplementary information extracting unit for calculating an elapsed time from the start time of the specific broadcast program to a specific screen and extracting the supplementary information corresponding to the elapsed time and a coordinate information received from a user terminal.