Patent ID: 9277251
Filing Date: 2016-03-01
CPC Classification: G11B,H04N

Claim Text:
1. A method for creating an announcement stream for a geographic region, comprising: receiving, at a designated computer system, characterizing metadata for a first audio/video stream; analyzing a second audio/video stream to obtain characterizing metadata for the second video stream, wherein the characterizing metadata of the first and second audio/video streams comprises average luminance values corresponding to individual video frames in the first and second video streams; comparing, with the computer system, the characterizing metadata for the first video stream to the characterizing metadata for the second video stream to generate offset data; and calculating timing information corresponding to segment boundaries for the second video stream using the offset data; wherein the comparing of the characterizing metadata for the first video stream to the characterizing metadata for the second video stream comprises: subtracting the average luminance values for each of the individual video frames of the second video stream from the average luminance values for each of the individual video frames of the first video stream to obtain a plurality of results; summing an absolute value of each of the plurality of results, for each of the individual video frames, to obtain a summed value; dividing the summed value by a total number of individual video frames for the second video stream to obtain a result; and when the result is lower than a threshold value, generating the offset data by subtracting timing information for the second video stream from timing information for the first video stream.