Wireless audio synchronization using a spread code

    公开(公告)号:US10931909B2

    公开(公告)日:2021-02-23

    申请号:US16133813

    申请日:2018-09-18

    Applicant: Roku, Inc.

    Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for synchronizing playback of audiovisual content among multiple speakers. In some embodiments, a first smart speaker receives a spread spectrum signal from a second smart speaker over an audio data channel. The first smart speaker despreads the spread spectrum signal based on a spreading code. The first smart speaker determines a time of receipt of the spread spectrum signal based on the despreading. The first smart speaker receives a time of transmission of the spread spectrum signal. The first smart speaker then calculates a playback delay based on the time of receipt and the time of transmission. Then the first smart speaker controls the playback of the audiovisual content based on the playback delay.

    Wireless audio synchronization using a spread code

    公开(公告)号:US11558579B2

    公开(公告)日:2023-01-17

    申请号:US17157215

    申请日:2021-01-25

    Applicant: Roku, Inc.

    Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for synchronizing playback of audiovisual content among multiple speakers. In some embodiments, a first smart speaker receives a spread spectrum signal from a second smart speaker over an audio data channel. The first smart speaker despreads the spread spectrum signal based on a spreading code. The first smart speaker determines a time of receipt of the spread spectrum signal based on the despreading. The first smart speaker receives a time of transmission of the spread spectrum signal. The first smart speaker then calculates a playback delay based on the time of receipt and the time of transmission. Then the first smart speaker controls the playback of the audiovisual content based on the playback delay.

    Identifying Audio Characteristics of a Room Using a Spread Code

    公开(公告)号:US20200091957A1

    公开(公告)日:2020-03-19

    申请号:US16133817

    申请日:2018-09-18

    Applicant: Roku, Inc.

    Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for identifying audio characteristics of a room using a spread code. In some embodiments, an audio responsive receives a spread spectrum signal from a smart speaker over an audio data channel. The audio responsive remote control determines a time of receipt of the spread spectrum signal based on despreading. The audio responsive remote control calculates an airtime delay associated with the smart speaker based on the time of receipt and a time of transmission. The audio responsive remote control then adjusts playback of audiovisual content at the smart speaker and a second smart speaker for a location based on the airtime delay. The audio responsive remote control can also determine whether the smart speaker is present in the room with it based on the airtime delay.

Patent Agency Ranking