公开(公告)号：US11184649B2

公开(公告)日：2021-11-23

申请号：US16924806

申请日：2020-07-09

Applicant: Roku, Inc.

Inventor： Peter Dunker ,  Markus K. Cremer ,  Shashank C. Merchant ,  Kurt R. Thielen

IPC: H04N21/234 ,  H04N21/485 ,  H04N21/845 ,  H04N21/8358 ,  H04N21/81 ,  H04L29/06

Abstract: When a media client is receiving a media stream, the media client determines an upcoming time point at which the media client is to perform a content revision involving insertion (e.g., substitution or overlaying) of new content. The media client further determines an advanced time point when the media client should initiate a process of acquiring the new content, setting the advanced time point sufficiently in advance of the upcoming content-revision time point to enable the media client to obtain at least enough of the new content to be able to start the content revision on time. In an example implementation, the media client could determine the advanced time point by predicting how long the content-acquisition process will take, based on consideration of past instances of content acquisition, possibly correlated with operational factors such as content source, processor load, memory load, network speed, and time of day.

公开(公告)号：US20210266616A1

公开(公告)日：2021-08-26

申请号：US17302720

申请日：2021-05-11

Applicant: Roku, Inc.

Inventor： Peter Dunker ,  Markus K. Cremer ,  Shashank C. Merchant ,  Kurt R. Thielen

IPC: H04N21/234 ,  G06F17/18 ,  H04N21/43

Abstract: A media client ascertains a plurality of matching points between (i) query fingerprints representing a media stream being received by the client and (ii) reference fingerprints, each identified matching point defining a respective match between a query fingerprint that is timestamped with client time defined according to a clock of the client and a reference fingerprint that is timestamped with true time defined according to a timeline within a known media stream. Further, the client performs linear regression based on the timestamps of the ascertained plurality of matching points, to establish a mapping between true time and client time. The client then uses the established mapping as a basis to determine a client-time point at which the client should perform an action with respect to media stream being received by the client. And the client performs the action at the determined client-time point.

公开(公告)号：US11044499B2

公开(公告)日：2021-06-22

申请号：US16890592

申请日：2020-06-02

Applicant: Roku, Inc.

Inventor： Peter Dunker ,  Markus K. Cremer ,  Shashank C. Merchant ,  Kurt R. Thielen

IPC: H04N21/234 ,  G06F17/18 ,  H04N21/43

Abstract: A media client ascertains a plurality of matching points between (i) query fingerprints representing a media stream being received by the client and (ii) reference fingerprints, each identified matching point defining a respective match between a query fingerprint that is timestamped with client time defined according to a clock of the client and a reference fingerprint that is timestamped with true time defined according to a timeline within a known media stream. Further, the client performs linear regression based on the timestamps of the ascertained plurality of matching points, to establish a mapping between true time and client time. The client then uses the established mapping as a basis to determine a client-time point at which the client should perform an action with respect to media stream being received by the client. And the client performs the action at the determined client-time point.