Overlay-based watermarking for video synchronization with contextual data

摘要

Systems and methods for synchronizing a broadcast video with contextual data are disclosed, wherein the broadcast video is enhanced by graphical overlays. Synchronization is achieved by means of digital watermarking of the broadcast video in conjunction with the graphical-overlays. Exemplary embodiments embed a watermark bitstream into the broadcast video based on an overlay-template, characteristic of a corresponding overlay-graphic. The watermarked video is then transmitted over a communication link to a receiving-end including a detector. According to some embodiment, the embedder inserts the watermark bitstream into the overlay-graphics' regions of the video and the detector extracts the watermark bitstream based on information in the overlay-template and based on a restored version of the original overlay-graphics.

主权项

1. A computer-implemented method, comprising:
receiving at an embedder's input a video frame covering an action in an event; receiving at the embedder's input a watermark encoding metadata related to one of the covered action and the video frame; receiving at the embedder's input an overlay-template characterizing an overlay-graphic, wherein the overlay-graphic is a graphical enhancement inserted into the video frame, and wherein the overlay-template comprises information used to define and generate a design for the overlay-graphic insertion into the video frame; and embedding the watermark within the video frame based on the overlay-template to create a watermarked video frame, wherein embedding the watermark comprises embedding the watermark into the overlay-graphic using the overlay-template, creating a watermarked overlay-graphic.