Patents by Inventor Chung Won Seo

Chung Won Seo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11812103
    Abstract: When a device is playing out a first media stream, the device determines a target time for beginning playout of a second media stream in place of the first media stream. The device then starts a stream-transition process that is expected to take anywhere from a minimum expected transition duration to a maximum expected transition duration, and the device starts the transition process in advance of the determined target time by the maximum expected transition duration, to help ensure timely starting of playout of the second media stream. Further, for an uncertainty period that extends from the minimum expected transition duration after the starting to the maximum expected transition duration after the starting, the device generates and plays a sequence of transition frames to help mask transition from the first media stream to the second media stream.
    Type: Grant
    Filed: October 13, 2022
    Date of Patent: November 7, 2023
    Assignee: ROKU, INC.
    Inventors: Chung Won Seo, Seunghyeong Lee
  • Patent number: 11641495
    Abstract: A computing system that identifies a media stream that a media client is processing for presentation determines which frame format of the media stream the media client is processing for presentation. And the computing system uses that determined frame format as a basis to facilitate dynamic content modification. For instance, based on then determined frame format, the computing system could work to ensure that replacement or overlay content that the media client obtains to facilitate dynamic content modification of the media stream is of that determined frame format. Further or alternatively, based on the determined frame format, the computing system could work to ensure that the media client gets provisioned with reference fingerprints of that particular frame format of the media stream, for use to facilitate client-side fingerprint matching to confirm that the media stream continues to be identified media stream.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: May 2, 2023
    Assignee: Roku, Inc.
    Inventors: Chung Won Seo, Shashank C. Merchant, Yong-joo Hong, Yoan Magniez
  • Publication number: 20230112570
    Abstract: When a device is playing out a first media stream, the device determines a target time for beginning playout of a second media stream in place of the first media stream. The device then starts a stream-transition process that is expected to take anywhere from a minimum expected transition duration to a maximum expected transition duration, and the device starts the transition process in advance of the determined target time by the maximum expected transition duration, to help ensure timely starting of playout of the second media stream. Further, for an uncertainty period that extends from the minimum expected transition duration after the starting to the maximum expected transition duration after the starting, the device generates and plays a sequence of transition frames to help mask transition from the first media stream to the second media stream.
    Type: Application
    Filed: October 13, 2022
    Publication date: April 13, 2023
    Applicant: ROKU, INC.
    Inventors: Chung Won Seo, Seunghyeong Lee
  • Patent number: 11627372
    Abstract: Disclosed herein are methods and systems to help disambiguate channel identification in a scenario where fingerprint data of media content matches multiple reference fingerprints corresponding respectively with multiple different channels. Upon detecting such a multi-match, a server or other entity will perform disambiguation based on a determination that a segment of the fingerprint data matches a reference fingerprint corresponding with just a single channel, such as a reference fingerprint representing commercial or news programming content specific to just the single channel. The server or other entity will thereby determine the channel on which the media content being rendered by the media presentation device is arriving, so as to facilitate taking channel-specific action.
    Type: Grant
    Filed: April 18, 2022
    Date of Patent: April 11, 2023
    Assignee: ROKU, INC.
    Inventors: Jaehyung Lee, Chung Won Seo, Youngmoo Kwon
  • Patent number: 11503366
    Abstract: When a device is playing out a first media stream, the device determines a target time for beginning playout of a second media stream in place of the first media stream. The device then starts a stream-transition process that is expected to take anywhere from a minimum expected transition duration to a maximum expected transition duration, and the device starts the transition process in advance of the determined target time by the maximum expected transition duration, to help ensure timely starting of playout of the second media stream. Further, for an uncertainty period that extends from the minimum expected transition duration after the starting to the maximum expected transition duration after the starting, the device generates and plays a sequence of transition frames to help mask transition from the first media stream to the second media stream.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: November 15, 2022
    Assignee: ROKU, INC.
    Inventors: Chung Won Seo, Seunghyeong Lee
  • Patent number: 11463765
    Abstract: A computing system will compare various reference fingerprints each representing a reference media stream broadcast on a different respective known channel, and the computing system will determine that a plurality of the reference fingerprints match each other, thus defining a multi-match group of the matching reference fingerprints. Further, the computing system will determine that a query fingerprint representing a media stream being rendered by a media presentation device matches the multi-match group, thus raising a question of which channel is carrying the media stream that is being rendered by the media presentation device. By considering one or more attributes of the query fingerprint, the server may then disambiguate and thereby determine the channel at issue, and the server may in turn take channel-specific action.
    Type: Grant
    Filed: January 21, 2021
    Date of Patent: October 4, 2022
    Assignee: Roku, Inc.
    Inventors: Chung Won Seo, Youngmoo Kwon, Jaehyung Lee
  • Patent number: 11412296
    Abstract: Disclosed are methods and systems to help disambiguate channel identification in a scenario where a video fingerprint of media content matches multiple reference video fingerprints corresponding respectively with multiple different channels. Given such a multi-match situation, an entity could disambiguate based on an audio component of the media content, such as by further determining that an audio fingerprint of the media content at issue matches an audio fingerprint of just one of the multiple channels, thereby establishing that that is the channel on which the media content being rendered by the media presentation device is arriving.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: August 9, 2022
    Assignee: Roku, Inc.
    Inventors: Chung Won Seo, Youngmoo Kwon, Jaehyung Lee
  • Publication number: 20220248084
    Abstract: Disclosed herein are methods and systems to help disambiguate channel identification in a scenario where fingerprint data of media content matches multiple reference fingerprints corresponding respectively with multiple different channels. Upon detecting such a multi-match, a server or other entity will perform disambiguation based on a determination that a segment of the fingerprint data matches a reference fingerprint corresponding with just a single channel, such as a reference fingerprint representing commercial or news programming content specific to just the single channel. The server or other entity will thereby determine the channel on which the media content being rendered by the media presentation device is arriving, so as to facilitate taking channel-specific action.
    Type: Application
    Filed: April 18, 2022
    Publication date: August 4, 2022
    Inventors: Jaehyung Lee, Chung Won Seo, Youngmoo Kwon
  • Publication number: 20220182692
    Abstract: A computing system that identifies a media stream that a media client is processing for presentation determines which frame format of the media stream the media client is processing for presentation. And the computing system uses that determined frame format as a basis to facilitate dynamic content modification. For instance, based on then determined frame format, the computing system could work to ensure that replacement or overlay content that the media client obtains to facilitate dynamic content modification of the media stream is of that determined frame format. Further or alternatively, based on the determined frame format, the computing system could work to ensure that the media client gets provisioned with reference fingerprints of that particular frame format of the media stream, for use to facilitate client-side fingerprint matching to confirm that the media stream continues to be identified media stream.
    Type: Application
    Filed: March 22, 2021
    Publication date: June 9, 2022
    Inventors: Chung Won Seo, Shashank C. Merchant, Yong-joo Hong, Yoan Magniez
  • Patent number: 11336956
    Abstract: Disclosed herein are methods and systems to help disambiguate channel identification in a scenario where fingerprint data of media content matches multiple reference fingerprints corresponding respectively with multiple different channels. Upon detecting such a multi-match, a server or other entity will perform disambiguation based on a determination that a segment of the fingerprint data matches a reference fingerprint corresponding with just a single channel, such as a reference fingerprint representing commercial or news programming content specific to just the single channel. The server or other entity will thereby determine the channel on which the media content being rendered by the media presentation device is arriving, so as to facilitate taking channel-specific action.
    Type: Grant
    Filed: April 15, 2021
    Date of Patent: May 17, 2022
    Assignee: Roku, Inc.
    Inventors: Jaehyung Lee, Chung Won Seo, Youngmoo Kwon
  • Patent number: 11317143
    Abstract: When a device is playing out a media stream, the device determines a target time at which the device is to start playing out replacement content in place of a portion of the media stream. However, the device then detects that a starting time when the device starts playout of the replacement content is delayed from the target time by a delay period of duration P. In response, the device then reduces its playout of the replacement content by duration P, to help playout of the replacement content end at a desired time. For instance, the device could seek forward in playout of the replacement content by duration P and/or could remove one or more other portions of the replacement content to total a reduction of duration P.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: April 26, 2022
    Assignee: Roku, Inc.
    Inventors: Chung Won Seo, Seunghyeong Lee
  • Patent number: 11317142
    Abstract: Disclosed are methods and systems involving location-based disambiguation of media channel identification, in a scenario where a fingerprint of media content being rendered by a media presentation device matches multiple reference fingerprints corresponding respectively with multiple different media channels. Upon detecting such a multi-match situation, a server or other entity will use a location of the media presentation device as a basis to disambiguate between the matching reference fingerprints and thus to determine the channel on which the media content being rendered by the media presentation device is arriving.
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: April 26, 2022
    Assignee: Roku, Inc.
    Inventors: Chung Won Seo, Youngmoo Kwon, Jaehyung Lee
  • Publication number: 20220038770
    Abstract: When a device is playing out a first media stream, the device determines a target time for beginning playout of a second media stream in place of the first media stream. The device then starts a stream-transition process that is expected to take anywhere from a minimum expected transition duration to a maximum expected transition duration, and the device starts the transition process in advance of the determined target time by the maximum expected transition duration, to help ensure timely starting of playout of the second media stream. Further, for an uncertainty period that extends from the minimum expected transition duration after the starting to the maximum expected transition duration after the starting, the device generates and plays a sequence of transition frames to help mask transition from the first media stream to the second media stream.
    Type: Application
    Filed: October 13, 2021
    Publication date: February 3, 2022
    Inventors: Chung Won Seo, Seunghyeong Lee
  • Patent number: 11206447
    Abstract: Disclosed herein are methods and systems to help disambiguate channel identification in a scenario where fingerprint data of media content being rendered by a media presentation device matches multiple reference fingerprints corresponding respectively with multiple different channels. Upon detecting such a multi-match, a server or other entity will perform disambiguation based at least in part on a comparison of time of broadcast of the media content being rendered by the media presentation device with time of broadcast of the media content represented by the reference fingerprints. The server or other entity will thereby determine the channel on which the media content being rendered by the media presentation device is arriving, so as to facilitate taking channel-specific action.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: December 21, 2021
    Assignee: Roku, Inc.
    Inventors: Chung Won Seo, Youngmoo Kwon, Jaehyung Lee
  • Patent number: 11178451
    Abstract: When a device is playing out a first media stream, the device determines a target time for beginning playout of a second media stream in place of the first media stream. The device then starts a stream-transition process that is expected to take anywhere from a minimum expected transition duration to a maximum expected transition duration, and the device starts the transition process in advance of the determined target time by the maximum expected transition duration, to help ensure timely starting of playout of the second media stream. Further, for an uncertainty period that extends from the minimum expected transition duration after the starting to the maximum expected transition duration after the starting, the device generates and plays a sequence of transition frames to help mask transition from the first media stream to the second media stream.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: November 16, 2021
    Assignee: Roku, Inc.
    Inventors: Chung Won Seo, Seunghyeong Lee
  • Publication number: 20210329333
    Abstract: Disclosed are methods and systems to help disambiguate channel identification in a scenario where a video fingerprint of media content matches multiple reference video fingerprints corresponding respectively with multiple different channels. Given such a multi-match situation, an entity could disambiguate based on an audio component of the media content, such as by further determining that an audio fingerprint of the media content at issue matches an audio fingerprint of just one of the multiple channels, thereby establishing that that is the channel on which the media content being rendered by the media presentation device is arriving.
    Type: Application
    Filed: June 30, 2021
    Publication date: October 21, 2021
    Inventors: Chung Won Seo, Youngmoo Kwon, Jaehyung Lee
  • Patent number: 11089360
    Abstract: Disclosed are methods and systems to help disambiguate channel identification in a scenario where a video fingerprint of media content matches multiple reference video fingerprints corresponding respectively with multiple different channels. Given such a multi-match situation, an entity could disambiguate based on an audio component of the media content, such as by further determining that an audio fingerprint of the media content at issue matches an audio fingerprint of just one of the multiple channels, thereby establishing that that is the channel on which the media content being rendered by the media presentation device is arriving.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: August 10, 2021
    Assignee: Gracenote, Inc.
    Inventors: Chung Won Seo, Youngmoo Kwon, Jaehyung Lee
  • Publication number: 20210235154
    Abstract: Disclosed are methods and systems involving location-based disambiguation of media channel identification, in a scenario where a fingerprint of media content being rendered by a media presentation device matches multiple reference fingerprints corresponding respectively with multiple different media channels. Upon detecting such a multi-match situation, a server or other entity will use a location of the media presentation device as a basis to disambiguate between the matching reference fingerprints and thus to determine the channel on which the media content being rendered by the media presentation device is arriving.
    Type: Application
    Filed: April 14, 2021
    Publication date: July 29, 2021
    Inventors: Chung Won Seo, Youngmoo Kwon, Jaehyung Lee
  • Publication number: 20210235157
    Abstract: Disclosed herein are methods and systems to help disambiguate channel identification in a scenario where fingerprint data of media content matches multiple reference fingerprints corresponding respectively with multiple different channels. Upon detecting such a multi-match, a server or other entity will perform disambiguation based on a determination that a segment of the fingerprint data matches a reference fingerprint corresponding with just a single channel, such as a reference fingerprint representing commercial or news programming content specific to just the single channel. The server or other entity will thereby determine the channel on which the media content being rendered by the media presentation device is arriving, so as to facilitate taking channel-specific action.
    Type: Application
    Filed: April 15, 2021
    Publication date: July 29, 2021
    Inventors: Jaehyung Lee, Chung Won Seo, Youngmoo Kwon
  • Patent number: 11012738
    Abstract: Disclosed are methods and systems involving location-based disambiguation of media channel identification, in a scenario where a fingerprint of media content being rendered by a media presentation device matches multiple reference fingerprints corresponding respectively with multiple different media channels. Upon detecting such a multi-match situation, a server or other entity will use a location of the media presentation device as a basis to disambiguate between the matching reference fingerprints and thus to determine the channel on which the media content being rendered by the media presentation device is arriving.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: May 18, 2021
    Assignee: Gracenote, Inc.
    Inventors: Chung Won Seo, Youngmoo Kwon, Jaehyung Lee