公开(公告)号：US20190238925A1

公开(公告)日：2019-08-01

申请号：US16319991

申请日：2016-07-25

Applicant: ROKU, INC.

Inventor： Paul FLEISCHER ,  Brian Thoft Moth MØLLER ,  Bjørn REESE

IPC: H04N21/43 ,  H03L7/00 ,  H04N21/4363 ,  H04N5/04

CPC classification number: H04N21/4305 ,  H03L7/00 ,  H04N5/04 ,  H04N21/4307 ,  H04N21/43637

Abstract: The invention provides a method for providing a synchronization in a computer network for synchronized playback of audio an/or video by a plurality of separate devices. Each separate device generates a virtual clock in response to a timing of the audio codec of a received audio stream. Especially, segmented time is used as reference time. Either the virtual clock is generated directly in response to the tick counter of the audio codec, or by a periodic measurement of the timing of the audio codec extrapolated by a monotonic clock. A sample rate converter may be used to slightly adjust the frequency of the virtual clock.