WO2019140746A1

WO2019140746A1 - Synchronous playing method of multiple playing devices and playing device

Info

Publication number: WO2019140746A1
Application number: PCT/CN2018/077608
Authority: WO
Inventors: 杜来柱
Original assignee: 深圳市沃特沃德股份有限公司
Priority date: 2018-01-19
Filing date: 2018-02-28
Publication date: 2019-07-25
Also published as: CN108108146A

Abstract

Disclosed in the present invention is a synchronous playing method of multiple playing devices, comprising: a second playing device receives Bluetooth information of a first playing device; obtain a first playing progress of the first playing device according to the Bluetooth information, and a local time of the first playing device and the time difference with the standard time, so as to obtain a first standard moment when the first playing device sends the Bluetooth information; obtain a second standard moment when the second playing device receives the Bluetooth information according to a local time of the second playing device and the time difference with the standard time; obtain the network delay time difference of the Bluetooth information according to the first standard moment and the second standard moment, add the network delay time difference to the first playing progress, and calculate a second playing progress of the second playing device; and switch the playing progress of the second playing device to the second playing progress. According to the present invention, synchronous playing of multiple playing devices can be implemented by means of BLE advertising control code information.

Description

Method and device for synchronous playback of multiple playback devices

Technical field

The present invention relates to the field of electronic technologies, and in particular, to a method and a playback device for synchronous playback of multiple playback devices.

Background technique

As people's living standards improve, more and more people pursue rich amateur life to meet the demand for spiritual food, and there are also small group entertainment organizations with different interests and hobbies, but in the group activities to meet the group Synchronization requirements of activities require synchronization activities through sound broadcasting, music broadcasting, etc., to improve the organization of group activities. For example, the square dance group organization usually plays songs through high-powered speakers to synchronize the dance steps of the group organization. However, the noise caused by the high-powered speakers playing the songs disturbs the people, and the contradictions and conflicts caused by the noise disturbance are also common. With the gradual advancement of electronic technology, the application of smart devices is becoming more and more popular. The group activities of smart devices with headphones can solve the problem of noise disturbance, but the simultaneous playback of multiple smart devices is still a technical problem.

Therefore, the prior art has yet to be improved.

technical problem

The main purpose of the present invention is to provide a method for synchronous playback of multiple playback devices, which aims to solve the technical problem that multiple smart devices cannot achieve synchronous playback.

Technical solution

The present invention provides a method for synchronous playback of multiple playback devices, including:

The second playing device receives the Bluetooth information of the first playing device;

Obtaining, according to the Bluetooth information, a first playing progress of the first playing device, and a time difference between the local time of the first playing device and the standard time, to obtain a first standard time for the first playing device to send the Bluetooth information; Obtaining, according to the time difference between the local time of the second playing device and the standard time, obtaining a second standard time for the second playing device to receive the Bluetooth information;

Obtaining a network delay time difference of the Bluetooth information according to the first standard time and the second standard time, and calculating a second playback progress of the second playing device by adding a network delay time difference to the first playing progress;

Switching the playback progress of the second playback device to the second playback progress.

Preferably, the first playing device is a master intelligent terminal, the Bluetooth information includes control code information, and the step of the second playing device receiving the Bluetooth information of the first playing device includes:

The second playing device scans each control code information broadcast by the other playing device at the current location;

Identifying the master intelligent terminal according to each of the control code information and a device code of a playback device that broadcasts the control code information;

Receiving control code information broadcasted by the Bluetooth headset connected to the master intelligent terminal, and recording a time instant of receiving the control code information.

Preferably, the Bluetooth information includes control code information, and the step of the second playback device receiving the Bluetooth information of the first playback device includes:

Selecting a playback device with the strongest broadcast signal strength as the first playback device according to the broadcast signal strength of each of the control code information;

Receiving control code information broadcast by the first playback device, and recording a time instant of receiving the control code information.

Preferably, before the step of scanning the control code information broadcasted by the other playback device at the current location, the second playback device includes:

The second playing device receives the request instruction to join the group, and joins the group;

Get the synchronized play file shared by the group.

Preferably, the step of the second playback device scanning the control code information broadcast by the other playback device at the current location includes:

The second playback device scans each of the control code information in a location area;

Determining whether to enter a range of broadcast signals for synchronous play according to the group number carried in each of the control code information;

If so, a selection command is generated in which the specified playback device is selected as the source of the broadcast signal within the range of the broadcast signal.

The invention also provides a playing device, comprising:

a first receiving module, configured to receive Bluetooth information of the first playing device;

a first acquiring module, configured to acquire, according to the Bluetooth information, a first playing progress of the first playing device, and a time difference between the local time of the first playing device and the standard time, to obtain the first playing device to send the Bluetooth information a first standard time; and obtaining, according to a time difference between the local time of the second playback device and the standard time, a second standard time at which the second playback device receives the Bluetooth information;

a calculation module, configured to obtain, according to the first standard time and the second standard time, a network delay time difference of the Bluetooth information, and calculate a network delay time difference plus a first play progress to calculate a second play device Second playback progress;

And a switching module, configured to switch a play progress of the second play device to the second play progress.

Preferably, the first playing device is a master control smart terminal, the Bluetooth information includes control code information, and the first receiving module includes:

a first scanning unit, configured to scan, by the second playback device, the control code information broadcast by the other playback device at the current location;

An identifying unit, configured to identify a master intelligent terminal according to each of the control code information and a device code of a playback device that broadcasts the control code information;

The first receiving unit is configured to receive control code information broadcast by the master intelligent terminal, and record a time instant of receiving the control code information.

Preferably, the Bluetooth information includes control code information, and the first receiving module includes:

a second scanning unit, configured to scan, by the second playback device, the control code information broadcasted by the other playback device at the current location;

a selecting unit, configured to select, according to the broadcast signal strength of each of the control code information, a playing device with the strongest broadcast signal strength as the first playing device;

The second receiving unit is configured to receive control code information broadcasted by the first playing device, and record a time instant of receiving the control code information.

Preferably, the playing device includes:

a second receiving module, configured to receive, by the second playing device, a request to join the group, to join the group;

The second obtaining module is configured to acquire a synchronous play file shared by the group.

Preferably, the first scanning unit or the second scanning unit includes:

a scanning subunit, configured to scan, by the second playing device, each of the control code information in a location area;

a determining subunit, configured to determine, according to the group number carried in each of the control code information, whether to enter a broadcast signal range that is synchronously played;

Generating a subunit, if YES, generating a selection instruction to select a designated playback device as a broadcast signal source within the range of the broadcast signal.

Beneficial effect

Advantageous technical effects of the present invention: The present invention realizes synchronous play of a plurality of playback devices by means of a BL-EDR and BLE-enabled Bluetooth device by means of BLE broadcast control code information, and obtains playback progress and standard time of the synchronized play file from the control code information. Calculate the network delay time, so as to obtain the accurate playback progress of the synchronized playback state of each playback device. When performing group activities through the above synchronous playback mode, only one person can wear the earphones, thereby avoiding the problem of noise disturbance. For example, square dance, no need for a tweeter, you can jump out of a quiet square dance by wearing headphones for each group member; for example, an outing/climbing/small party, etc., can form a small open contact area through the above synchronous playback mode, and synchronize Listening to songs, simultaneous tour guides, etc., only the leader must establish an APP group in advance through the smart device, share the list with other group members, and all the group members can control the respective smart terminals to synchronously play the updated play files according to the control code information. The activities of various groups do not interfere with each other and solve the problem of noise disturbance.

DRAWINGS

1 is a schematic flowchart of a method for synchronously playing a plurality of playback devices according to an embodiment of the present invention;

2 is a schematic structural diagram of a playback device according to an embodiment of the present invention;

3 is a schematic structural diagram of a first receiving module according to an embodiment of the present invention;

4 is a schematic structural diagram of a first receiving module according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of an optimized structure of a playback device according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a first scanning unit according to an embodiment of the present invention.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

BEST MODE FOR CARRYING OUT THE INVENTION

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1, a method for synchronously playing a plurality of playback devices according to an embodiment of the present invention includes:

S1: The second playing device receives the Bluetooth information of the first playing device.

The playback device of this embodiment includes a smart terminal connected to a Bluetooth headset supporting BR/EDR and BLE, a Bluetooth headset or a Bluetooth speaker with a playback function supporting BR/EDR and BLE.

S2: acquiring, according to the foregoing Bluetooth information, a first playing progress of the first playing device, and a time difference between the local time of the first playing device and the standard time, to obtain a first standard time for the first playing device to send the Bluetooth information; And obtaining, according to the time difference between the local time of the second playing device and the standard time, obtaining a second standard time for the second playing device to receive the Bluetooth information.

The Bluetooth information of this embodiment includes a standard time, a play file progress time, and the like. The standard time in this embodiment is the standard time of the current time zone of the network, such as Beijing time. The difference between the local time of each playback device and the standard time is different, which affects the synchronous playback effect. In this embodiment, each playing device does not need to consume network traffic during the synchronous playing process, and the Bluetooth information sent by the Bluetooth wireless technology realizes synchronous playing, thereby reducing the use cost.

S3: Obtain a network delay time difference of the Bluetooth information according to the first standard time and the second standard time, and calculate a second playback progress of the second playing device by adding a network delay time difference to the first playing progress.

In this step, the second playback device is implemented by the first playback progress of the first playback device, the time difference between the local time of the first playback device and the standard time, and the time difference between the local time and the standard time of the second playback device. The second playback progress of the first playback device synchronously playing.

S4: Switch the playing progress of the second playing device to the second playing progress.

In this step, synchronous playback is achieved by automatically switching the playback progress of the second playback device to the second playback progress. In an embodiment of the present invention, by simultaneously pressing and holding the volume of the Bluetooth headset of the master control terminal and the power button for 2 seconds, the main playback mode of the "synchronous broadcast" is entered, and the Bluetooth headset volume +/- button is pressed to select a playlist. Press the power button to start playing the files in the play file list, such as songs, in order. When the Bluetooth headset of the master intelligent terminal of the embodiment starts playing, the BLE broadcast control code information is used, and the Bluetooth headset of the other slave intelligent terminal controls the volume-and power-on button for 2 seconds to enter the slave play of "synchronous broadcast". Mode, at the same time, the BLE scan is started from the Bluetooth headset of the control intelligent terminal, the surrounding BLE broadcast signal is scanned, the control code information of the Bluetooth headset of the master intelligent terminal is obtained, and the playback progress time of the slave intelligent terminal is recalculated after time error conversion, Determine the progress of the playback of the file being played and start playing the file, such as a song, from this playback progress. At the same time, the Bluetooth headset of the slave intelligent terminal also broadcasts the control code information obtained by the BLE. In this embodiment, in order to ensure the synchronous play effect during playback, the playback progress is adjusted by controlling the volume +/- buttons. In order to achieve the basic and accurate synchronous playback of the master intelligent terminal and the slave intelligent terminal.

Further, the first playing device of the embodiment is a master control smart terminal, and the Bluetooth information includes control code information, and the step S1 includes:

S10: The second playing device scans each control code information broadcast by the other playing device at the current location.

In this embodiment, the smart terminal includes a smart phone. The playback device in this embodiment is a smart phone connected to a Bluetooth headset. The audio connection between the smart phone and the Bluetooth headset includes an A2DP protocol (Advanced Audio Distribution Profile). Or BLE (Bluetooth Low Energy, Bluetooth low power). The Bluetooth headset of this embodiment supports the BR/EDR point-to-point radio communication function and the BLE broadcast function, and the BR (Basic Rate) operation, the instantaneous rate can reach 1 Mbit/s, EDR (Enhanced Data) Rate, enhanced data rate) runs as π/4-DPSK and 8DPSK scheme, instantaneous rate up to 2 Mbit/s and 3Mbit/s. In this embodiment, multiple playback devices are synchronously played by the Bluetooth radio technology to save network traffic. The Bluetooth information in this embodiment refers to the control code information of the BLE broadcast through the Bluetooth headset. The control code information includes: a group number, a standard time, a broadcast time, a playlist number, a play song number, a play progress time, and the like. The playback device of the other embodiments of the present invention is a smart terminal with a Bluetooth function or a Bluetooth device with a play function. The user can implement the technical solution of the present invention by wearing a common earphone.

S11: Identify the master intelligent terminal according to each of the control code information and the device code of the playback device that broadcasts the control code information.

In this embodiment, the synchronous control is implemented by using the slave intelligent terminal as the standard by the other slave intelligent terminals, which is beneficial to improving the consistency of the synchronous play. In this embodiment, the Bluetooth headset connected to the master intelligent terminal is found by identifying the device code of the Bluetooth headset carried in the control code information, and then the master intelligent terminal is found to receive the playing state information of the master intelligent terminal. Synchronous playback with the master smart terminal.

S12: Receive control code information broadcast by the master intelligent terminal, and record a time instant of receiving the control code information.

In this step, when the control code information of the playing state of the master intelligent terminal carried in the Bluetooth information broadcasted by the intelligent terminal is controlled, the receiving time and time are simultaneously recorded to calculate the second playing progress of the second playing device more accurately, so as to improve The accuracy of the playback in synchronization with the first playback device.

Further, in another embodiment of the present invention, the Bluetooth information includes control code information, and step S1 includes:

S13: The second playing device scans each control code information broadcast by the other playing device at the current location.

The functions of the playback device and the content of the control code information in this embodiment are the same as those in S10 in the previous embodiment, and are not described herein.

S14: Select, according to the broadcast signal strength of each of the control code information, a playback device with the strongest broadcast signal strength as the first playback device.

The BLE signal transmission distance of this embodiment can theoretically reach more than 100 meters, but considering the interference, power consumption and other factors, the Bluetooth wireless signal becomes worse after the distance is greater than 50 meters, and the group is directly connected with the master when the number of members is large or dispersed. The effect of synchronizing the smart terminal with the reference standard is not good. In this embodiment, the control code information is transmitted from the Bluetooth headset of the main control intelligent terminal by the Bluetooth headset of the adjacent smart terminal, and the relay transmission is sequentially performed. This embodiment expands the Bluetooth wireless technology. The scope of networking is suitable for a large number of group activities. The BLE broadcast information of the embodiment is open, and the Bluetooth headsets of the surrounding smart terminals can be scanned. When there are more intelligent terminals connected to the Bluetooth headset, there are a lot of broadcast information in the periphery, forming an open broadcast signal network area. The Bluetooth headset remotely controlling the smart terminal from the Bluetooth headset of the master intelligent terminal can obtain the control code information from the Bluetooth headset of other slave intelligent terminals in the vicinity thereof, so that the control code information is sent from the Bluetooth headset of the master intelligent terminal. Through the relay transmission, after obtaining the control code information from the Bluetooth headset of each slave intelligent terminal, the transmission delay time is calculated according to the playback progress carried in the control code information and the time difference with the standard time, and then obtained by adding the transmission delay time. Accurate synchronous playback of the playback progress time, the control code information obtained from the Bluetooth headset of the control smart terminal is simultaneously broadcasted to the Bluetooth headset of other adjacent slave intelligent terminals. The principle of synchronous play by the control code information in this embodiment is the same as the previous embodiment, except that the reference standard for synchronous play is different, and the reference standard for playback progress conversion is also different.

S15: Receive control code information broadcast by the first playing device, and record a time instant of receiving the control code information.

Further, before step S10 or S13, the method includes:

S16: The second playing device receives the request instruction to join the group, and joins the group.

In this embodiment, the synchronous play file is downloaded to the host smart phone end in the WIFI environment, for example, an audio file such as a song. Then, the group is formed by the "synchronous play" APP of the master smartphone, and the synchronized play file list is shared to the slave smartphones of the group members and stored in the slave smartphones. The Bluetooth headset of the embodiment of the present invention does not have a play function, the play device is a smart phone connected to a Bluetooth headset, and the play file is stored in a smart phone that has established an A2DP connection with the Bluetooth headset. The playback device of another embodiment of the present invention is a Bluetooth headset or a Bluetooth speaker with a play function, and the play file is locally stored by a Bluetooth headset or a Bluetooth speaker.

S17: Acquire a synchronized play file shared by the group.

The storage folder/file name of the synchronized play file obtained in this embodiment is customized according to the play file list by the “synchronous play” APP, and cannot be changed arbitrarily, so that the serial number of the play file list of each member is the same as the content, so that the play file is The serial number of the list enables simultaneous playback of the playback content. In other embodiments of the present invention, a Bluetooth headset or a Bluetooth speaker that supports local playback is stored by copying a folder of a synchronously played file to a storage space of a Bluetooth headset or a Bluetooth speaker, and then storing the list number and file name generated by playing the file list, and the same. It can't be changed.

Further, step S10 or S13 includes:

S101: The second playback device scans each of the control code information in a location area.

The control code information broadcasted by the Bluetooth device is an open signal area. In this embodiment, the control code information broadcasted by other groups of Bluetooth devices may exist around the Bluetooth headset, and the different groups are identified by the group number carried in the control code information.

S102: Determine, according to the group number carried in each of the control code information, whether to enter a range of broadcast signals for synchronous play.

The BLE signal transmission distance in this embodiment can theoretically reach 100 meters or more, but considering the interference/power consumption and other factors, the broadcast signal range area is 50 meters away, and the group number carried in the control code information is simultaneously determined whether it needs to enter. Synchronizing the broadcast signal range of the active group to stably receive the synchronization progress information of the play file currently played by the group.

S103: If yes, generating a selection instruction for selecting a designated playback device as a broadcast signal source within the broadcast signal range.

In this embodiment, the playback device that refers to the synchronization is selected within the defined range of the Bluetooth wireless signal to improve the stability and continuity of the synchronous playback. The playback device selected according to the selection instruction includes, but is not limited to, a master intelligent terminal and a playback device having the strongest broadcast signal strength.

Referring to FIG. 2, a playback device according to an embodiment of the present invention is used as a second playback device, and includes:

The first receiving module 1 is configured to receive, by the second playing device, Bluetooth information of the first playing device.

The playback device of this embodiment includes a smart terminal connected to a Bluetooth headset supporting BR/EDR and BLE, or a Bluetooth headset or Bluetooth speaker with a playback function supporting BR/EDR and BLE.

The first obtaining module 2 is configured to obtain, according to the Bluetooth information, a first playing progress of the first playing device, and a time difference between the local time of the first playing device and the standard time, to obtain that the first playing device sends the Bluetooth The first standard time of the information; and according to the time difference between the local time of the second playing device and the standard time, obtaining the second standard time for the second playing device to receive the Bluetooth information.

The calculation module 3 is configured to obtain a network delay time difference of the Bluetooth information according to the first standard time and the second standard time, and calculate a network delay time difference plus a first play progress to calculate the second playback device. The second playback progress.

In this embodiment, the second playback device is implemented by the first playback progress of the first playback device, the time difference between the local time and the standard time of the first playback device, and the time difference between the local time and the standard time of the second playback device. The second playback progress played in synchronization with the first playback device.

The switching module 4 is configured to switch the playing progress of the second playing device to the second playing progress.

In this step, synchronous playback is achieved by automatically switching the playback progress of the second playback device to the second playback progress. In an embodiment of the present invention, by simultaneously pressing and holding the volume of the Bluetooth headset of the master control terminal and the power button for 2 seconds, the main playback mode of the "synchronous broadcast" is entered, and the Bluetooth headset volume +/- button is pressed to select a playlist. Press the power button to start playing the files in the play file list, such as songs, in order. When the Bluetooth headset of the master intelligent terminal of the embodiment starts playing, the BLE broadcast control code information is used, and the Bluetooth headset of the other slave intelligent terminal controls the volume-and power-on button for 2 seconds to enter the slave play of "synchronous broadcast". Mode, at the same time, the BLE scan is started from the Bluetooth headset of the control intelligent terminal, the surrounding BLE broadcast signal is scanned, the control code information of the Bluetooth headset of the master intelligent terminal is obtained, and the playback progress of the slave intelligent terminal is recalculated through time error conversion to determine The playback progress time of the file is being played, and the playback of the file, such as a song, is started from this playback progress. At the same time, the Bluetooth headset of the slave intelligent terminal also broadcasts the control code information obtained by the BLE. In this embodiment, in order to ensure the synchronous play effect during playback, the playback progress is adjusted by controlling the volume +/- buttons. In order to achieve the basic and accurate synchronous playback of the master intelligent terminal and the slave intelligent terminal.

Referring to FIG. 3, the first playback device in this embodiment is a master control smart terminal, and the Bluetooth information includes control code information, and the first receiving module 1 includes:

The first scanning unit 10 is configured to scan, by the second playing device, the control code information broadcasted by other playing devices at the current location.

In this embodiment, the smart terminal includes a smart phone. The playback device in this embodiment is a smart phone connected to a Bluetooth headset. The audio connection between the smart phone and the Bluetooth headset includes an A2DP protocol (Advanced Audio Distribution Profile). Or BLE (Bluetooth Low Energy, Bluetooth low power). The Bluetooth headset of this embodiment supports the BR/EDR point-to-point radio communication function and the BLE broadcast function, and the BR (Basic Rate) operation, the instantaneous rate can reach 1 Mbit/s, EDR (Enhanced Data) Rate, enhanced data rate) runs as π/4-DPSK and The 8DPSK scheme has instantaneous rates of up to 2 and 3 Mbit/s. In this embodiment, multiple playback devices are synchronously played by the Bluetooth radio technology to save network traffic. The Bluetooth information in this embodiment refers to the control code information of the BLE broadcast through the Bluetooth headset. The control code information includes: a group number, a standard time, a broadcast time, a playlist number, a play song number, a play progress time, and the like. The playback device of the other embodiments of the present invention is a smart terminal with a Bluetooth function or a Bluetooth device with a play function. The user can implement the technical solution of the present invention by wearing a common earphone.

The identifying unit 11 is configured to identify the master smart terminal according to each of the control code information and a device code of a playing device that broadcasts the control code information.

The first receiving unit 12 is configured to receive control code information broadcast by the master intelligent terminal, and record a time instant of receiving the control code information.

In this embodiment, when the first receiving unit 12 receives the control code information that carries the playing state of the master intelligent terminal, the receiving time and time are simultaneously recorded to calculate the second playing progress of the second playing device more accurately, so as to improve the first The accuracy of the playback of the playback device.

Referring to FIG. 4, in another embodiment of the present invention, the Bluetooth information includes control code information, and the first receiving module 1 includes:

The second scanning unit 13 is configured to scan, by the second playback device, the control code information broadcasted by the other playback devices at the current location.

The functions of the second scanning unit 13 and the content of the control code information of the playback device of this embodiment are the same as those of the first scanning unit 10 in the previous embodiment, and are not described herein.

The selecting unit 14 is configured to select, as the first playing device, the playing device with the strongest broadcast signal strength according to the broadcast signal strength of each of the control code information.

The BLE signal transmission distance of this embodiment can theoretically reach more than 100 meters, but considering the interference, power consumption and other factors, the Bluetooth wireless signal becomes worse after the distance is greater than 50 meters, and the group is directly connected with the master when the number of members is large or dispersed. The effect of synchronizing the smart terminal with the reference standard is not good. In this embodiment, the control code information is transmitted from the Bluetooth headset of the main control intelligent terminal by the Bluetooth headset of the adjacent smart terminal, and the relay transmission is sequentially performed. This embodiment expands the Bluetooth wireless technology. The scope of networking is suitable for a large number of group activities. The BLE broadcast information of the embodiment is open, and the Bluetooth headsets of the surrounding smart terminals can be scanned by the second scanning unit 13. When there are more intelligent terminals connected to the Bluetooth headset, there are a lot of broadcast information in the periphery, forming an open In the broadcast signal network area, the Bluetooth headset of the slave intelligent terminal far away from the Bluetooth headset of the master intelligent terminal can obtain the control code information from the Bluetooth headset of other slave intelligent terminals in the vicinity thereof, so that the control code information is from the master intelligent terminal. After the Bluetooth headset is sent, through the relay transmission, after receiving the control code information from each Bluetooth headset of the slave intelligent terminal, the transmission delay time is calculated according to the playback progress carried in the control code information and the time difference with the standard time, and then passed. The transmission delay time is obtained by subtracting the transmission delay time, and the obtained control code information is simultaneously broadcasted by the Bluetooth headset of the intelligent terminal to be transmitted to the Bluetooth headset of other adjacent slave intelligent terminals. The principle of synchronous play by the control code information in this embodiment is the same as the previous embodiment, except that the reference standard for synchronous play is different, and the reference standard for playback progress conversion is also different.

The second receiving unit 15 is configured to receive control code information broadcast by the first playing device, and record a time instant of receiving the control code information.

Referring to FIG. 5, the playback device of this embodiment includes:

The second receiving module 16 is configured to receive, by the second playing device, a request instruction to join the group, and join the group.

In this embodiment, the synchronous play file is downloaded to the host smart phone end in the WIFI environment, for example, an audio file such as a song. Then, the group is formed by the "synchronous play" APP of the master smartphone, and the synchronized play file list is shared to the slave smartphones of the group members and stored in the slave smartphones. The Bluetooth headset according to an embodiment of the present invention does not have a play function, the play device is a smart phone connected to a Bluetooth headset, and the play file is stored in a smart phone that has established an A2DP connection with the Bluetooth headset. The playback device of another embodiment of the present invention is a Bluetooth headset or a Bluetooth speaker with a play function, and the play file is locally stored by a Bluetooth headset or a Bluetooth speaker.

The second obtaining module 17 is configured to acquire a synchronized play file shared by the group.

Referring to FIG. 6, the first scanning unit 10 of the present embodiment has the same structure as the second scanning unit 13 of another embodiment. Taking the first scanning unit 10 as an example, the method includes:

The scanning subunit 101 is configured to scan, by the second playing device, each of the control code information in a location area.

The control code information broadcasted by the Bluetooth device is an open signal area. In this embodiment, the control code information broadcasted by other groups of Bluetooth devices may exist around the Bluetooth headset, and the control code information is scanned by the scanning subunit 101 to identify the carried group. Group numbers identify different groups.

The determining sub-unit 102 is configured to determine, according to the group number carried in each of the control code information, whether to enter the broadcast signal range of the synchronous play.

The generating subunit 103 is configured to, if yes, generate a selection instruction for selecting a designated playback device as a broadcast signal source within the broadcast signal range. The playback device selected according to the selection instruction includes, but is not limited to, a master intelligent terminal and a playback device having the strongest broadcast signal strength.

In this embodiment, the playback device that refers to the synchronization is selected within the defined range of the Bluetooth wireless signal to improve the stability and continuity of the synchronous playback.

In the embodiment of the present invention, a Bluetooth device supporting BR/EDR and BLE is used to realize synchronous play of multiple playback devices by means of BLE broadcast control code information, and the playback progress and standard time of the synchronous play file are obtained from the control code information, and the network is calculated. The delay time is obtained, thereby obtaining each accurate playback progress of the synchronized playback state of each playback device. When performing group activities through the above synchronous playback mode, only one person can wear the earphones, thereby avoiding the problem of noise disturbance. For example, square dance, no need for a tweeter, you can jump out of a quiet square dance by wearing headphones for each group member; for example, an outing/climbing/small party, etc., can form a small open contact area through the above synchronous playback mode, and synchronize Listening to songs, simultaneous tour guides, etc., only the leader must establish an APP group in advance through the smart device, share the list with other group members, and all the group members can control the respective smart terminals to synchronously play the updated play files according to the control code information. The activities of various groups do not interfere with each other and solve the problem of noise disturbance.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims

A method for synchronously playing a plurality of playing devices, comprising:

The second playing device receives the Bluetooth information of the first playing device;

Obtaining, according to the Bluetooth information, a first playing progress of the first playing device, and a time difference between the local time of the first playing device and the standard time, to obtain a first standard time for the first playing device to send the Bluetooth information; Obtaining, according to the time difference between the local time of the second playing device and the standard time, obtaining a second standard time for the second playing device to receive the Bluetooth information;

Obtaining a network delay time difference of the Bluetooth information according to the first standard time and the second standard time, and calculating a second playback progress of the second playing device by adding a network delay time difference to the first playing progress;

Switching the playback progress of the second playback device to the second playback progress.
The method for synchronously playing a plurality of playing devices according to claim 1, wherein the first playing device is a master smart terminal, the Bluetooth information includes control code information, and the second playing device receives the first The steps of playing the Bluetooth information of the device include:

a second playing device, configured to scan, at a current location, each control code information broadcast by another playing device;

Identifying the master intelligent terminal according to each of the control code information and a device code of a playback device that broadcasts the control code information;

Receiving control code information broadcast by the master intelligent terminal, and recording a time instant of receiving the control code information.
The method for synchronously playing a plurality of playback devices according to claim 1, wherein the Bluetooth information comprises control code information, and the step of the second playback device receiving Bluetooth information of the first playback device comprises:

The second playing device scans each control code information broadcast by the other playing device at the current location;

Selecting a playback device with the strongest broadcast signal strength as the first playback device according to the broadcast signal strength of each of the control code information;

Receiving control code information broadcast by the first playback device, and recording a time instant of receiving the control code information.
The method for synchronously playing a plurality of playback devices according to claim 2 or 3, wherein before the step of scanning the control code information broadcast by the other playback device at the current location, the second playback device includes:

The second playing device receives the request instruction to join the group, and joins the group;

Get the synchronized play file shared by the group.
The method for synchronously playing a plurality of playback devices according to claim 2 or 3, wherein the step of scanning the control code information broadcasted by the other playback device at the current location by the second playback device comprises:

The second playback device scans each of the control code information in a location area;

Determining whether to enter a range of broadcast signals for synchronous play according to the group number carried in each of the control code information;

If so, a selection command is generated in which the specified playback device is selected as the source of the broadcast signal within the range of the broadcast signal.
The method for synchronously playing a plurality of playback devices according to claim 1, wherein the first playback device and the second playback device are Bluetooth headsets or Bluetooth speakers with a playback function.
A playback device, comprising:

a first receiving module, configured to receive Bluetooth information of the first playing device;

a first acquiring module, configured to acquire, according to the Bluetooth information, a first playing progress of the first playing device, and a time difference between the local time of the first playing device and the standard time, to obtain the first playing device to send the Bluetooth information a first standard time; and obtaining, according to a time difference between the local time of the second playback device and the standard time, a second standard time at which the second playback device receives the Bluetooth information;

a calculation module, configured to obtain, according to the first standard time and the second standard time, a network delay time difference of the Bluetooth information, and calculate a network delay time difference plus a first play progress to calculate a second play device Second playback progress;

And a switching module, configured to switch a play progress of the second play device to the second play progress.
The playback device according to claim 7, wherein the first playback device is a master control smart terminal, the Bluetooth information includes control code information, and the first receiving module includes:

a first scanning unit, configured to scan, by the second playback device, the control code information broadcast by the other playback device at the current location;

An identifying unit, configured to identify a master intelligent terminal according to each of the control code information and a device code of a playback device that broadcasts the control code information;

The first receiving unit is configured to receive control code information broadcast by the master intelligent terminal, and record a time instant of receiving the control code information.
The playback device according to claim 7, wherein the Bluetooth information comprises control code information, and the first receiving module comprises:

a second scanning unit, configured to scan, by the second playback device, the control code information broadcasted by the other playback device at the current location;

a selecting unit, configured to select, according to the broadcast signal strength of each of the control code information, a playing device with the strongest broadcast signal strength as the first playing device;

The second receiving unit is configured to receive control code information broadcasted by the first playing device, and record a time instant of receiving the control code information.
The playback device according to claim 8 or 9, comprising:

a second receiving module, configured to receive, by the second playing device, a request to join the group, to join the group;

The second obtaining module is configured to acquire a synchronous play file shared by the group.
The playback device according to claim 8 or 9, wherein the first scanning unit or the second scanning unit comprises:

a scanning subunit, configured to scan, by the second playing device, each of the control code information in a location area;

a determining subunit, configured to determine, according to the group number carried in each of the control code information, whether to enter a broadcast signal range that is synchronously played;

Generating a subunit, if YES, generating a selection instruction to select a designated playback device as a broadcast signal source within the range of the broadcast signal.