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.

Inventor： Robert Caston Curtis ,  Mark Ely ,  Brian Thoft Moth Møller

IPC: H04N5/765 ,  H04N5/60 ,  H04N21/43 ,  G10L21/0208 ,  G06F3/16

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.

公开(公告)号：US11361773B2

公开(公告)日：2022-06-14

申请号：US16553579

申请日：2019-08-28

Applicant: Roku, Inc.

Inventor： Thomas Richard Henry Dewey ,  Robert Caston Curtis

IPC: G06F3/16 ,  H04R5/04 ,  G10L19/008 ,  H04R3/14 ,  H04R5/02 ,  H04S1/00

Abstract: Embodiments included herein generally relate to using non-audio data embedded in an audio signal. More particularly, embodiments relate to using non-audio data embedded into the audio signal to control an audio configuration of a plurality of speakers and/or to measure a delay of a playback device.

公开(公告)号：US20210136494A1

公开(公告)日：2021-05-06

申请号：US16671991

申请日：2019-11-01

Applicant: Roku, Inc.

Inventor： Robert Caston Curtis ,  Kasper Andersen

IPC: H04R3/04

Abstract: Embodiments included herein generally relate to managing low frequencies of an output signal. For example, a method may include: measuring a sound pressure level (SPL) of a speaker; dynamically selecting a cutoff frequency for operating a first filter configured to provide a first bass component of a bass element of an output signal and a second filter configured to provide a second bass component of the bass element; providing the cutoff frequency to the first filter to configure the first filter to generate the first bass component based on the cutoff frequency; providing the cutoff frequency to the second filter to configure the second filter to generate the second bass component based on the cutoff frequency; and generating an output signal based on at least one of the first and second bass components.

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.

Inventor： Robert Caston Curtis ,  Mark Ely ,  Brian Thoft Moth Møller

IPC: H04B1/7073 ,  H04L29/06 ,  H04R3/12

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.