Systems and methods for syncronizing multiple electronic devices

Patent metadata

Field	Value
Publication number	US-9307508-B2
Application number	US-201313945493-A
Country	US
Kind code	B2
Filing date	Jul 18, 2013
Priority date	Apr 29, 2013
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

Embodiments are provided for syncing multiple electronic devices for collective audio playback. According to certain aspects, a master device connects ( 218 ) to a slave device via a wireless connection. The master device calculates ( 224 ) a network latency via a series of network latency pings with the slave device and sends ( 225 ) the network latency to the slave device. Further, the master devices sends ( 232 ) a portion of an audio file as well as a timing instruction including a system time to the slave device. The master device initiates ( 234 ) playback of the portion of the audio file and the slave devices initiates ( 236 ) playback of the portion of the audio file according to the timing instruction and a calculated system clock offset value.

First claim

The invention claimed is:

1. An audio playback device comprising:
a communication component adapted to connect the audio playback device to a master device via a wireless connection;
an audio output component adapted to output audio;
a data socket; and
a controller module configured to interface with the communication component and the audio output component, and further configured to:
receive, via the wireless connection, a request from the master device including a first system time,
send a response to the master device via the wireless connection,
receive a one-way network latency time value from the master device,
calculate a system clock offset value based on the one-way network latency time value, the first system time, and a slave system time,
join an audio playback session with the master device using the data socket via the wireless connection,
receive, using the audio playback session, at least a portion of an audio file and a playback timing instruction indicating a second system time,
initiate playback of at least the portion of the audio file from the audio output component according to the playback timing instruction and the system clock offset value,
receive, from the master device, a first elapsed time of playback of the audio file on the master device,
compare the first elapsed time of playback to a current second elapsed time of playback of the audio file from the audio output component,
determine that a difference between the first elapsed time of playback and the current second elapsed time of playback exceeds a threshold amount, the threshold amount based on at least a predetermined threshold and the playback timing instruction, and
send, to the master device, an indication that the playback from the audio output component is out of sync.

2. The audio playback device of claim 1 , wherein the wireless connection is one of a Wi-Fi Direct connection or a Wi-Fi connection.

3. The audio playback device of claim 1 , further comprising:
a user interface adapted to receive input from a user,
wherein the controller module is further configured to:
detect user input, via the user interface, corresponding to a playback command request for the audio file,
send the playback command request to the master device,
receive a playback command and command timing instructions from the master device, and
modify the playback from the audio output component according to the playback command, the command timing instructions, and the system clock offset value.

4. The audio playback device of claim 3 , wherein the playback command request is to skip to a next audio track, wherein the controller module modifies the playback by:
receiving, using the audio playback session, at least a portion of another audio file and another playback timing instruction from the master device, and
initiating playback of at least the portion of the another audio file from the audio output component according to the another playback timing instruction and the system clock offset value.

5. The audio playback device of claim 1 , further comprising:
a user interface adapted to receive input from a user,
wherein the controller module is further configured to:
detect a selection of another audio file via the user interface,
send a request to the master device via the wireless connection to switch roles, receive, from the master device via the wireless connection, a notification that the audio playback device and the master device will switch roles.

6. The audio playback device of claim 1 , wherein the controller module is further configured to:
receive, using the audio playback session, an additional portion of the audio file from the master device, and
initiate playback of the additional portion of the audio file from the audio output component according to the playback timing instruction and the system clock offset value.

7. The audio playback device of claim 1 , further comprising:
a user interface adapted to receive input from a user,
wherein the controller module is further configured to:
annunciate, via the user interface, a computing audio latency time value for the audio playback device,
detect, via the user interface, an adjustment request to the computing audio latency time value, and
adjust the playback of at least the portion of the audio file from the audio output component according to the adjustment request.

8. The audio playback device of claim 1 , wherein the controller module is further configured to:
measure a computing audio latency time value reflecting an elapsed time for the audio file to propagate through the audio playback device from the controller module to the audio output component, and
adjust the playback of at least the portion of the audio file from the audio output component based on the computing audio latency time value.

9. The audio playback device of claim 1 , further comprising:
an audio input component adapted to detect audio,
wherein the controller module is further configured to:
receive, using the audio playback session, a sync playback instruction from the master device for playback of audio sync data at a specified time, wherein the master device initiates playback of the audio sync data at the specified time,
initiate playback of the audio sync data from the audio output component at the specified time, and
calculate, from audio detected by the audio input component, an audio latency time value reflecting a time difference in the playback of the audio sync data on the master device and the playback of the audio sync data from the audio output component.

Assignees

• Motorola Mobility Llc
• Google Technology Holdings LLC

Inventors

• Daley Michael J
• Bolinger Travis
• O'Neal Heath

Classifications

• H04H20/18

  Arrangements for synchronising broadcast or distribution via plural systems · CPC title

• H04W56/0015 Primary

  one node acting as a reference for the others · CPC title

• H04H60/80

  characterised by transmission among terminal devices · CPC title

• H04H20/61

  for local area broadcast, e.g. instore broadcast · CPC title

• H04H20/08

  among terminal devices · CPC title