公开(公告)号：US20200314467A1

公开(公告)日：2020-10-01

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: H04N21/2389 ,  H04N21/24 ,  H04N21/2187 ,  H04N21/8358 ,  H04N21/234 ,  H04N21/233 ,  H04N21/845

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.