Patent ID: 9100654
Filing Date: 2015-08-04
Classification: G06T,H04N

Abstract:
1. A video watermarking method comprising: detecting spatial domain information of an image from code words of a compressed video bit stream while in a compression domain; segmenting the image corresponding to the compressed video bit stream into a plurality of segments with respect to the spatial domain, based on the spatial domain information of the image detected from the code words of the compressed video bit stream while the image is in the compression domain; inserting a watermark into a segment among the plurality of segments while in the compression domain such that a group of the code words that includes the watermark is based on a group of the code words included in the segment, a sign of the segment and a watermark gain factor, the watermark generating an effect in the segment when the segment is transformed to the spatial domain; and recombining the segment including the watermark.