公开(公告)号：WO2021118992A1

公开(公告)日：2021-06-17

申请号：PCT/US2020/063769

申请日：2020-12-08

Applicant: THE NIELSEN COMPANY (US), LLC

Inventor： CHRISTIAN, Timothy ,  RAHAMAN, Rasha

IPC: H04N19/467 ,  H04N21/8358 ,  H04N21/2389 ,  H04N21/4385 ,  G06T1/00

Abstract: Apparatus, devices, systems, methods, and articles of manufacture are disclosed for watermarking with phase shifting. An example watermark decoding apparatus includes a component detector to identify watermark components in a media signal and detect phases of the respective ones of the watermark components in the media signal. The example apparatus also includes a phase reference determiner to identify a phase reference for the watermark components. The example apparatus also includes a phase comparator to perform comparisons of the phases of the respective ones of the watermark components with the phase reference. The example apparatus also includes a phase shift determiner to determine phase shifts associated with respective ones of the watermark components based on the comparisons. In addition, the example apparatus also includes a symbol determiner to determine a symbol based on the phase shifts.