公开(公告)号：US11259058B2

公开(公告)日：2022-02-22

申请号：US16814278

申请日：2020-03-10

Applicant: Apple Inc.

Inventor： Simon Goldrei ,  Steven E. Saunders ,  Roger N. Pantos ,  John Matienzo

IPC: H04N7/173 ,  H04N21/2389 ,  H04N21/24 ,  H04N21/2187 ,  H04N21/845 ,  H04N21/234 ,  H04N21/233 ,  H04N21/8358

Abstract: Techniques are disclosed for measuring propagation delay of a media distribution system based on content output by rendering devices. An output from an output device of the media distribution system may be captured and a token may be detected from the captured content. A timecode may be derived from the detected token. The system's propagation delay may be determined from the derived timecode and may provide a basis to analyze system delays and other processing artifacts. In this manner, propagation artifacts may be estimated between multiple rendering devices that lack controls to synchronize their operation.