公开(公告)号：US10509625B2

公开(公告)日：2019-12-17

申请号：US16416188

申请日：2019-05-18

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: H04J3/06 ,  G06F3/16 ,  H04R27/00 ,  H04L7/00 ,  H04L7/033 ,  H04R3/12 ,  H04L29/06 ,  H04N21/43 ,  H04N21/233 ,  H04H60/80 ,  H04M1/725 ,  H04N21/81

Abstract: An electronic device that reduces relative drift is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may store the adjustments to the clock circuit. Furthermore, when a wireless reset occurs, the interface circuit may adapt the clock circuit based on the stored adjustments to reduce the relative drift while the interface circuit restores frequency lock with the second clock based on additional packets with additional transmit times that are received from the second electronic device.

公开(公告)号：US20190171412A1

公开(公告)日：2019-06-06

申请号：US16266101

申请日：2019-02-03

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: G06F3/16 ,  H04M1/725 ,  H04N21/233 ,  H04R27/00 ,  H04L29/06 ,  H04H60/80 ,  H04N21/43 ,  H04L7/00 ,  H04L7/033 ,  H04N21/81

Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and the electronic device may perform the playback operation at the corrected future time.

公开(公告)号：US10296285B2

公开(公告)日：2019-05-21

申请号：US15678072

申请日：2017-08-15

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: G06F17/00 ,  G06F3/16 ,  H04R27/00 ,  H04L7/00 ,  H04L7/033 ,  H04H60/80 ,  H04L29/06 ,  H04M1/725 ,  H04N21/233 ,  H04N21/81 ,  H04N21/43 ,  H04R3/12

Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the second electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may transmit information to the second electronic device specifying the corrected future time.

公开(公告)号：US10296286B2

公开(公告)日：2019-05-21

申请号：US15678078

申请日：2017-08-15

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: H04J3/06 ,  G06F3/16 ,  H04R27/00 ,  H04L7/00 ,  H04L7/033 ,  H04H60/80 ,  H04L29/06 ,  H04M1/725 ,  H04N21/233 ,  H04N21/81 ,  H04N21/43 ,  H04R3/12

Abstract: An electronic device that reduces relative drift is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may store the adjustments to the clock circuit. Furthermore, when a wireless reset occurs, the interface circuit may adapt the clock circuit based on the stored adjustments to reduce the relative drift while the interface circuit restores frequency lock with the second clock based on additional packets with additional transmit times that are received from the second electronic device.

公开(公告)号：US20180167192A1

公开(公告)日：2018-06-14

申请号：US15678078

申请日：2017-08-15

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: H04L7/00 ,  H04L7/033

CPC classification number: G06F3/165 ,  H04H60/80 ,  H04L7/0012 ,  H04L7/0016 ,  H04L7/033 ,  H04L7/0331 ,  H04L65/4069 ,  H04L65/60 ,  H04L65/608 ,  H04L65/80 ,  H04M1/72558 ,  H04N21/233 ,  H04N21/4305 ,  H04N21/8113 ,  H04R3/12 ,  H04R27/00 ,  H04R2420/07

Abstract: An electronic device that reduces relative drift is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may store the adjustments to the clock circuit. Furthermore, when a wireless reset occurs, the interface circuit may adapt the clock circuit based on the stored adjustments to reduce the relative drift while the interface circuit restores frequency lock with the second clock based on additional packets with additional transmit times that are received from the second electronic device.

公开(公告)号：US20190272146A1

公开(公告)日：2019-09-05

申请号：US16416188

申请日：2019-05-18

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: G06F3/16 ,  H04R3/12 ,  H04L7/00 ,  H04H60/80 ,  H04L7/033 ,  H04R27/00 ,  H04J3/06 ,  H04L29/06 ,  H04M1/725 ,  H04N21/233 ,  H04N21/43 ,  H04N21/81

Abstract: An electronic device that reduces relative drift is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may store the adjustments to the clock circuit. Furthermore, when a wireless reset occurs, the interface circuit may adapt the clock circuit based on the stored adjustments to reduce the relative drift while the interface circuit restores frequency lock with the second clock based on additional packets with additional transmit times that are received from the second electronic device.

公开(公告)号：US20190235829A1

公开(公告)日：2019-08-01

申请号：US16378466

申请日：2019-04-08

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylond Yu

IPC: G06F3/16 ,  H04R3/12 ,  H04L29/06 ,  H04H60/80 ,  H04R27/00 ,  H04L7/033 ,  H04L7/00 ,  H04M1/725 ,  H04N21/233 ,  H04N21/43 ,  H04N21/81

CPC classification number: G06F3/165 ,  H04H60/80 ,  H04J3/0632 ,  H04J3/0661 ,  H04L7/0012 ,  H04L7/0016 ,  H04L7/033 ,  H04L7/0331 ,  H04L65/4069 ,  H04L65/60 ,  H04L65/608 ,  H04L65/80 ,  H04M1/72558 ,  H04N21/233 ,  H04N21/4305 ,  H04N21/8113 ,  H04R3/12 ,  H04R27/00 ,  H04R2227/005 ,  H04R2420/07

Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the second electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may transmit information to the second electronic device specifying the corrected future time.

公开(公告)号：US20180165057A1

公开(公告)日：2018-06-14

申请号：US15678072

申请日：2017-08-15

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: G06F3/16 ,  H04R27/00 ,  H04L7/033 ,  H04L7/00

CPC classification number: G06F3/165 ,  H04H60/80 ,  H04L7/0012 ,  H04L7/0016 ,  H04L7/033 ,  H04L7/0331 ,  H04L65/4069 ,  H04L65/60 ,  H04L65/608 ,  H04L65/80 ,  H04M1/72558 ,  H04N21/233 ,  H04N21/4305 ,  H04N21/8113 ,  H04R3/12 ,  H04R27/00 ,  H04R2420/07

Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the second electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and may transmit information to the second electronic device specifying the corrected future time.

公开(公告)号：US10255033B2

公开(公告)日：2019-04-09

申请号：US15678069

申请日：2017-08-15

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: G06F3/16 ,  H04L7/00 ,  H04R3/12 ,  H04H60/80 ,  H04L29/06 ,  H04L7/033 ,  H04M1/725 ,  H04N21/43 ,  H04N21/81 ,  H04R27/00 ,  H04N21/233

Abstract: An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and the electronic device may perform the playback operation at the corrected future time.

公开(公告)号：US20180167647A1

公开(公告)日：2018-06-14

申请号：US15678087

申请日：2017-08-15

Applicant: EVA Automation, Inc.

Inventor： Leo Lay ,  Adrian Harold Chadd ,  Haisong Wang ,  Shiwei Zhao ,  Li Li ,  Gaylord Yu

IPC: H04N21/233 ,  H04H60/80 ,  H04N21/81 ,  H04M1/725 ,  H04L29/06

CPC classification number: G06F3/165 ,  H04H60/80 ,  H04L7/0012 ,  H04L7/0016 ,  H04L7/033 ,  H04L7/0331 ,  H04L65/4069 ,  H04L65/60 ,  H04L65/608 ,  H04L65/80 ,  H04M1/72558 ,  H04N21/233 ,  H04N21/4305 ,  H04N21/8113 ,  H04R3/12 ,  H04R27/00 ,  H04R2420/07

Abstract: A processor in an electronic device may coordinate an interface clock in the electronic device with a second interface clock in a second electronic device based on time-coordination information received in packets from the second electronic device. Then, the processor captures timing information associated with the interface clock provided by an interface clock circuit to increase a resolution of a system clock. Moreover, the processor may track, using the timing information, relative drift as a function of time between the system clock and the interface clock, and may determine, based on the relative drift, an estimated time offset between the interface clock and the system clock at the future time. Next, the processor modifies a future time when the electronic device is to perform the playback operation based on the estimated time offset to determine a corrected future time, and may perform the playback operation at the corrected future time.