Patent ID: 8724968
Filing Date: 2014-05-13
Classification: G11B,H04N

Abstract:
1. A method of maintaining ancillary data included in an original video signal in a corresponding time-altered video signal, the original video signal having an original run time, the ancillary data having an original bit rate, the method comprising: altering the original run time of the original video signal by removing at least one frame from the original video signal to provide the corresponding time-altered video signal; extracting and storing a copy of the ancillary data corresponding to each frame included in the original video signal; if the ancillary data corresponding to the removed frame includes active data, then writing the stored copy of the ancillary data for the removed frame onto a next frame of the time-altered video signal; and if the ancillary data corresponding to the removed frame does not include active data, then discarding the stored copy of the ancillary data for the removed frame.