公开(公告)号：US11503362B2

公开(公告)日：2022-11-15

申请号：US17213921

申请日：2021-03-26

Applicant: Roku, Inc.

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

IPC: H04N21/43 ,  H04N21/234 ,  H04N21/4402 ,  H04N21/44

Abstract: A computing system identifies a media stream being received by a client, based on fingerprint matching conducted with query fingerprints generated by the client at a frame rate. The computing system then causes the client to increase the frame rate, in order to facilitate establishment by the computing system of synchronous lock between true time within the media stream and client time according to a clock of the client. The computing system then uses the established synchronous lock as a basis to map a true-time point at which a content revision should be performed in the media stream to a client-time point at which the client should perform the content revision. And the computing system causes the client to perform the content revision at the determined client-time point.

公开(公告)号：US20220191563A1

公开(公告)日：2022-06-16

申请号：US17653183

申请日：2022-03-02

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.

公开(公告)号：US11284131B2

公开(公告)日：2022-03-22

申请号：US17247517

申请日：2020-12-15

Applicant: Roku, Inc.

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

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

Abstract: A computing system identifies multiple matching points between (i) query fingerprints representing a media stream being received by a client and (ii) reference fingerprints, each identified matching point defining a respective match between a query fingerprint timestamped with client time defined according to a clock of the client and a reference fingerprint timestamped with true time defined according to a timeline within a known media stream. Further, the computing system performs linear regression based on the timestamps of the matching points, to establish a mapping between true time and client time. The computing system then uses the mapping to determine a client-time point at which the client should perform a content revision or other action with respect to the media stream being received by the client. And the computing system causes the client to perform the content revision or other action at the determined client-time point.

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.