Patent ID: 8300147
Filing Date: 2012-10-30
Classification: H04N

Abstract:
1. A computer-implemented method for characterizing a relative offset in time between audio and video signals, the method comprising: receiving, from a television origination facility, a sequence of frames including video and audio signals as well as in-band characterization data associated with each scanline of video data and audio data for each frame in the sequence of frames that is transmitted using in-band signals; extracting the in-band characterization data from the sequence of frames; capturing characterization data for each scanline of video data and audio data for each frame in the sequence of frames based on the video and audio signals to produce captured characterization data; and comparing the captured characterization data for each scanline of video data and audio data for each frame with the extracted in-band characterization data to determine the relative offset in time between the audio and video signals for the sequence of frames.