公开(公告)号：US12249344B1

公开(公告)日：2025-03-11

申请号：US17853773

申请日：2022-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Christopher Evans ,  Sumit Garg ,  Ameya Agaskar ,  Mohammad Edris Qarghah ,  Zhengping Jin

IPC: G10L25/51 ,  G10L15/08 ,  G10L15/22 ,  G10L19/018

Abstract: Described herein is a system for encoding audio watermarks with frequency extensions to enable enhanced watermark detection. An extended audio watermark may include an existing audio watermark and a duplicate audio watermark, enabling backwards compatibility with existing watermark detection while also enabling enhanced watermark detection with increased accuracy. For example, embedding the extended audio watermark enables (i) limited devices to perform watermark detection to detect the existing audio watermark, and (ii) improved devices to perform enhanced watermark detection to detect the extended audio watermark. As the extended audio watermark includes redundancy in the form of duplicate audio watermark(s), an accuracy of performing enhanced watermark detection is increased relative to detecting the existing audio watermark alone.