公开(公告)号：US10120642B2

公开(公告)日：2018-11-06

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: 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: 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.

公开(公告)号：US10120641B2

公开(公告)日：2018-11-06

申请号：US15678083

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: A processor in an electronic device maintains coordination between a system clock provided by a system clock circuit and an interface clock provided by a clock circuit. Then, the processor 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 the interface clock and a second interface clock in the second electronic device. Moreover, the processor adjusts, based on the relative drift, the system clock circuit to eliminate the relative drift. Next, the processor may determine a remaining time offset between the interface clock and the second interface clock. Furthermore, the processor modifies 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 may perform the playback operation at the corrected future time.

公开(公告)号：US20180167646A1

公开(公告)日：2018-06-14

申请号：US15678083

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 maintains coordination between a system clock provided by a system clock circuit and an interface clock provided by a clock circuit. Then, the processor 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 the interface clock and a second interface clock in the second electronic device. Moreover, the processor adjusts, based on the relative drift, the system clock circuit to eliminate the relative drift. Next, the processor may determine a remaining time offset between the interface clock and the second interface clock. Furthermore, the processor modifies 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 may perform the playback operation at the corrected future time.

公开(公告)号：US20180165056A1

公开(公告)日：2018-06-14

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 ,  H04R27/00 ,  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 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.