TRANSMISSION CROSS REFERENCE TO RELATED APPLICATIONS

[001] This application is based on and claims priority to the following applications:

U.S. Application No. 14/919,124, filed October 21 , 2015, entitled "METHODS, DEVICES AND SYSTEMS FOR BLUETOOTH AUDIO TRANSMISSION"; U.S. Provisional Application No. 62/187,956, filed July 2, 2015, entitled "METHODS, DEVICES AND SYSTEMS FOR BLUETOOTH AUDIO

TRANSMISSION";

U.S. Application No. 14/639,71 1 , titled "METHODS, DEVICES AND

SYSTEMS FOR INCREASING WIRELESS COMMUNICATION RANGE," filed March 5, 2015;

U.S. Provisional Application No. 62/1 10,250, titled "METHODS, DEVICES AND SYSTEMS FOR INCREASING WIRELESS COMMUNICATION RANGE," filed on January 30, 2015;

U.S. Provisional Application No. 62/110,262, titled "BLUETOOTH

TRANSPARENT RELAY," filed on January 30, 2015;

U.S. Application No. 14/789,614, titled "METHODS, DEVICES AND

SYSTEMS FOR SUPPORTING WIRELESS COMMUNICATION," filed July 1 ,

2015.

The entire contents of the above-referenced U.S. patent applications including U.S. Application Nos. 14/919,124, 14/639,71 1 , 14/789,614, 62/1 10,250, 62/1 10,262, and 62/187,956 are incorporated herein by reference. TECHNICAL FIELD

[002] This disclosure relates generally to the field of Bluetooth

communication and, more particularly, to methods, devices, and systems for Bluetooth audio transmission.

BACKGROUND

[003] Bluetooth devices such as Bluetooth speakers, smart phones, smart locks, have become widely used in many applications. Conventionally, a Bluetooth enabled client device, such as a smart phone, may communicate to a Bluetooth device, such as a Bluetooth speaker or headset, within a short communication range, typically less than ten meters inside an indoor area. If a wall is located between the Bluetooth device and the client device, generally the Bluetooth transmission does not penetrate the wall, and as a result, communication may not be established between the Bluetooth device and the client device.

[004] At a given time instant, a Bluetooth device may be controlled by a single client device and may not be controlled by multiple client devices

simultaneously. For the Bluetooth device to switch from a current controlling client device to another controlling client device, a user associated with the current controlling client device may need to terminate the connection between the current controlling client device and the Bluetooth device, such that another client device may be paired to the Bluetooth device subsequently to gain control of the Bluetooth device. Moreover, where multiple Bluetooth devices are present and each of the devices is associated with a separate application interface, a user of the client device may have to start multiple different applications in order to control the multiple Bluetooth devices.

[005] Thus, it is desirable to extend the communication range of Bluetooth devices without having to increase the transmission power or production cost of the Bluetooth devices. Further, it is desirable to allow multiple client devices to control the Bluetooth devices simultaneously and, in the meantime, provide a unified application interface for a user to manage the Bluetooth devices.

SUMMARY

[006] The present disclosure provides a device for providing audio data to a plurality of Bluetooth audio devices. Consistent with some embodiments, the device includes one or more Bluetooth transceivers for communicating with the plurality of Bluetooth audio devices, at least one network interface, one or more processors, and a memory for storing instructions executable by the one or more processors. The one or more processors may be configured to receive the audio data via the at least one network interface, decode the audio data for audio playing, and transmit the decoded audio data to the plurality of Bluetooth audio devices via the one or more Bluetooth transceivers.

[007] Consistent with some embodiments, this disclosure provides a method for providing audio data to a plurality of Bluetooth audio devices. The method includes receiving the audio data via at least one network interface, decoding the audio data for audio playing, and transmitting the decoded audio data to the plurality of Bluetooth audio devices via one or more Bluetooth transceivers.

[008] Consistent with some embodiments, this disclosure provides another device for providing audio data to a plurality of Bluetooth audio devices. The device includes one or more Bluetooth transceivers for communicating with the plurality of Bluetooth audio devices, an antenna, a radio frequency (RF) front end system communicatively coupled to the transceiver and the antenna, at least one network interface, one or more processors, and a memory for storing instructions executable by the one or more processors. The RF frpnt end system includes a RF sampling block coupled to the one or more Bluetooth transceivers and configured to sample signals received from the one or more Bluetooth transceivers and output voltage signals, a RF switching logic coupled to the RF sampling block to receive the voltage signals and configured to switch the RF front end system between a transmitting mode and a receiving mode, a RF transmission gain block coupled to the RF switching logic and configured to increase a transmission power of the signals received from the one or more Bluetooth transceivers, and a RF receiving gain block coupled to the RF switching logic and configured to suppress noise signals contained in radio frequency signals received from the antenna. The one or more processors may be configured to receive the audio data via the at least one network interface, decode the audio data for audio playing, and transmit the decoded audio data to the plurality of Bluetooth audio devices via the one or more Bluetooth transceivers.

[009] Consistent with some embodiments, this disclosure provides another device for providing audio data to a plurality of Bluetooth audio devices. The device includes a configurable antenna system including a plurality of antenna elements, one or more Bluetooth transceivers for communicating with the plurality of Bluetooth audio devices, an antenna logic system communicatively coupled to the one or more Bluetooth transceivers and the configurable antenna system, at least one network interface, one or more processors, and a memory for storing instructions executable by the one or more processors. Each of the antenna elements may be capable of being turned on or off to produce different antenna configurations. The one or more Bluetooth transceivers may be configured to generate a received signal strength indicator (RSSI) for each of the antenna configurations. The RSSI may be generated based on signals received from a client device. The antenna logic system may be configured to receive, from the one or more Bluetooth transceivers, the RSSI for each of the antenna configurations, select an antenna configuration among the antenna configurations based on the RSSI, and configure the configurable antenna system with the selected antenna configuration. The one or more processors may be configured to receive the audio data via the at least one network interface, decode the audio data for audio playing, and transmit the decoded audio data to the plurality of Bluetooth audio devices via the one or more Bluetooth transceivers.

[010] Additional objects and advantages of the present disclosure will be set forth in part in the following detailed description, and in part will be obvious from the description, or may be learned by practice of the present disclosure. The objects and advantages of the present disclosure will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims.

[011] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not restrictive of the invention, as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

[012] The accompanying drawings, which constitute a part of this

specification, illustrate several embodiments and, together with the description, serve to explain the disclosed principles.

[013] FIG. 1 illustrates an exemplary system environment for implementing methods and systems consistent with the present disclosure. [014] FIG. 2 illustrates an exemplary block diagram of a Bluetooth hub, in accordance with an embodiment of the present disclosure.

[015] FIG. 3 illustrates an exemplary diagram of a method for producing surrounding sound by a Bluetooth hub, in accordance with an embodiment of the present disclosure.

[016] FIG. 4 illustrates an exemplary diagram of a user interface for managing Bluetooth devices, in accordance with an embodiment of the present disclosure.

[017] FIG. 5 illustrates another exemplary diagram of a user interface for managing Bluetooth devices, in accordance with an embodiment of the present disclosure.

[018] FIG. 6 illustrates an exemplary diagram of a user interface for playing music with a Bluetooth device, in accordance with an embodiment of the present disclosure.

[019] FIG. 7 illustrates an exemplary diagram of a user interface for controlling Bluetooth devices, in accordance with an embodiment of the present disclosure.

[020] FIG. 8 illustrates an exemplary diagram of a user interface for selecting music to be played by a Bluetooth device, in accordance with an embodiment of the present disclosure.

[021 ] FIG. 9 is a flowchart of an exemplary method for providing audio data to a plurality of Bluetooth devices, in accordance with an embodiment of the present disclosure.

[022] FIG. 10 is a flowchart of an exemplary method for receiving audio data by a Bluetooth hub, in accordance with an embodiment of the present disclosure. [023] FIG. 1 1 is a flowchart of an exemplary method for producing a surrounding sound effect by a Bluetooth hub, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION

[024] Exemplary embodiments are described with reference to the accompanying drawings. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. Wherever convenient, the same reference numbers are used throughout the drawings to refer to the same or like parts. While examples and features of disclosed principles are described herein, modifications, adaptations, and other implementations are possible without departing from the spirit and scope of the disclosed embodiments. Also, the words "comprising," "having," "containing," and "including," and other similar forms are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. It is intended that the following detailed description be considered as exemplary only, with the true scope and spirit being indicated by the following claims.

[025] The illustrated components and steps are set out to explain the exemplary embodiments shown, and it should be anticipated that ongoing technological development will change the manner in which particular functions are performed. These examples are presented herein for purposes of illustration, and not limitation. Further, the boundaries of the functional building blocks have been arbitrarily defined herein for the convenience of the description. Alternative boundaries can be defined so long as the specified functions and relationships thereof are appropriately performed. Alternatives (including equivalents, extensions, variations, deviations, etc., of those described herein) will be apparent to persons skilled in the relevant art(s) based on the teachings contained herein. Such alternatives fall within the scope and spirit of the disclosed embodiments.

[026] FIG. 1 illustrates an exemplary system environment 100 for

implementing methods and systems consistent with the present disclosure. The system environment 100 shown in FIG. 1 includes client devices 1 10 and 1 15, a hub 120, non-Bluetooth devices 130 and 135, Bluetooth adapters 131 and 136 attached to non-Bluetooth devices 130 and 135 respectively, Bluetooth devices 140 and 145, and a network 150. In the present disclosure, a client device refers to an electronic device provided with a user interface for a user of the client device to perform access or control of a Bluetooth device. The client device may be a smart phone, a tablet, a computer, a laptop, a smart watch, a TV, or other electronic devices with screens and operating systems. In some embodiments, the client device may be configured with a Bluetooth interface that allows the client device to transmit or receive

Bluetooth signals. In other embodiments, the client device may not be configured with a Bluetooth interface and may not be capable to transmit or receive Bluetooth signals. The Bluetooth devices 140 and 145 may be speakers, headsets, microphones, lights, printers, smart watches, cameras, TVs, monitors, wearable devices including wristbands, pedometers, activity trackers, sleep trackers, weight scales, etc. The non-Bluetooth devices 130 and 135 may be any types of the electronic devices mentioned above except that the non-Bluetooth devices do not include an internal Bluetooth communication interface. The system environment 100 may also include more or less number of Bluetooth devices, non-Bluetooth devices, or client devices than those shown in FIG. 1.

[027] As shown in FIG. 1 , the client device 1 10 may be connected to the hub 120 through a wireless communication link. For example, the client device 1 10 may be a Bluetooth-enabled client device that communicates to the hub 120 using Bluetooth communication protocol. The client device 1 10 may also communicate to the hub 120 using other wireless communication protocol, e.g., ZigBee, WiFi, etc. When communication is to be established between a Bluetooth-enabled client device and a Bluetooth device, the hub 120 may receive radio signal from the Bluetooth- enabled client device (e.g., client device 1 10), process the received signal, and send corresponding radio signal to the Bluetooth device (e.g., Bluetooth device 145), such that communication may be established through the hub 120. The hub 120 may also be called as a router, and in this disclosure, the terms of hub and router are intended to be inter-exchangeable.

[028] In some embodiments, the hub 120 may also support communication between a Bluetooth-enabled client device and a non-Bluetooth device. For example, a Bluetooth adapter (e.g., Bluetooth adapter 136) may be attached to the non-Bluetooth device (e.g., device 135), and the hub 120 may send and/or receive Bluetooth signals to the non-Bluetooth device through the Bluetooth adapter. For example, the Bluetooth adapter may be connected to a non-Bluetooth device, such as a non-Bluetooth speaker or headset, and enable the non-Bluetooth device to receive Bluetooth signals from a Bluetooth-enabled client device via the hub 120.

[029] In some embodiments, the hub 120 may be used to increase the communication range between a Bluetooth-enabled client device and a Bluetooth device. For example, the hub 120 may be implemented with smart antennas and/or smart front end systems to extend the Bluetooth communication range. Methods and systems for implementing the hub 120 are described in U.S. Provisional Application No. 62/1 10,250, filed January 30, 2015, entitled "METHODS, DEVICES AND SYSTEMS FOR INCREASING WIRELESS COMMUNICATION RANGE," and U.S. Provisional Application No. 62/1 10,262, filed January 30, 2015, entitled

"BLUETOOTH TRANSPARENT RELAY," the entire contents of all of which are incorporated herein by reference.

[030] In some embodiments, the client devices may communicate with the hub 120 through a network 150. For example, as shown in FIG. 1 , the client device 115 may remotely communicate with the hub 120 and/or other client devices via the network 150. The network 150 may be any type of network that provides

communications, exchanges information, and/or facilitates the exchange of information between the hub 120 and client devices. In one embodiment, the network 150 may be the Internet, a Local Area Network, a cellular communication network, a wireless local area network, or other suitable connections that allow the client devices to send and receive information to/from the hub 120. In some embodiments, the network 150 may include a remote cloud-based network system that can be accessed by both the client device 1 15 and the hub 120. For example, the client device 1 15 may control the hub 120 through a cloud server by using a smart phone application. As another example, the hub 120 may be configured to connect to the Internet via the network 150 and perform online audio and/or music streaming according to a request received from the client device 115 via the network 150.

[031] In the following description, Bluetooth protocols and devices are used to illustrate the design of the hub 120. It should be understood, however, that similar constructions of the wireless hub can be applied to scenarios where other wireless communication protocols are used without departing from the spirit and scope of the present disclosure.

[032] FIG. 2 illustrates an exemplary architecture of a Bluetooth hub 200, in accordance with an embodiment of the present disclosure. As shown in FIG. 2, the Bluetooth hub 200 may include two Bluetooth chips 210 and 220, a data bus 230, a Bluetooth stack 240, a main CPU 250, and an application layer 260. The Bluetooth hub may also include more or less number of Bluetooth chips than those shown in FIG. 2.

[033] The Bluetooth chips 210 and 220 may each include a Bluetooth transceiver and be configured to communicate with Bluetooth devices, such as Bluetooth devices 140 and 145, and Bluetooth adapters 131 and 136. In some embodiments, each of the Bluetooth chips 210 and 220 may include one or more audio connections that can be used to output audio data. Each of the audio connections may be configured to output same or different audio data at a given time instant, so as to produce the desired sound effect. In some implementations, a sound server may be implemented in the Bluetooth hub 200 to route audio data to an appropriate Bluetooth audio device. The sound server may accept sound input from one or more sources and redirecting it to an appropriate Bluetooth audio device. For example, the Bluetooth hub 200 may include PulseAudio or other types of sound server.

[034] The CPU 250 may be configured to execute instructions associated with operations of the Bluetooth hub 200. Additionally, the CPU 250 may execute certain instructions and commands to provide wireless communication, using the Bluetooth chips 210 and 220. The Bluetooth stack 240 may implement functionalities provided in the Bluetooth protocol. For example, the Bluetooth stack 240 may implement the scanning, pairing, and connection functions to establish a Bluetooth connection. The Bluetooth stack 250 may interact with the data bus 230 and/or the Bluetooth chips 210 and 220, and provide data output to the main CPU 240 and/or the application layer 260. The application layer 260 may be used for interacting with and managing end-user applications.

[035] In some implementations, the Bluetooth stack 240 may include software programs designed to facilitate multimedia audio streaming from the Bluetooth hub 200 to a Bluetooth device, such as a Bluetooth speaker or headset. For example, the Bluetooth stack 240 may include Advanced Audio Distribution Profile (A2DP) that allows Bluetooth audio streaming from a Bluetooth enabled client device to a Bluetooth speaker or headset. As another example, the Bluetooth stack 240 may include Audio/Video Distribution Transport Protocol (AVDTP) protocol that specifies the transport protocol for audio and video distribution and streaming over the Bluetooth air interface. As another example, the Bluetooth stack 240 may include Audio/Video Remote Control Profile (AVRCP) protocol that allows a user to control media playback from Bluetooth audio devices, such as Bluetooth speakers or headsets.

[036] In some implementations, the application layer 260 may include a media player used to decode audio and/or video files, such as open source media player MPIayer, window media player, or the like. For example, the hub 200 may perform online music streaming via the network 150 and the media player may be used for playing the audio files downloaded from the Internet.

[037] The Bluetooth hub 200 may also include other auxiliary components, such as random access memory (RAM), read only memory (ROM), secondary storage (for example, a hard disk drive or flash memory). One skilled in the art will readily appreciate that various other components can also be included in the

Bluetooth hub 200.

[038] The Bluetooth hub 200 may communicate with a client device, such as a smart phone, on the application layer level, and communicate with the Bluetooth devices on the link layer level. For example, the Bluetooth hub 200 may

communicate with a smart phone using WiFi, Bluetooth, or other communication protocols. When communicating with the Bluetooth devices, the Bluetooth hub 200 may operate as a master device that initiates an outgoing connection request to one of the Bluetooth devices that serve as slave devices.

[039] A person having ordinary skill in the art should appreciate that the above described Bluetooth hub 200 can be modified to apply to scenarios where other wireless communication protocols are used. For example, the Bluetooth chips 210 and 220 and Bluetooth stack 240 in FIG. 2 may be replaced by chips and protocol stack of other wireless communication protocols, such as WIFI, and the resulting hub 200 would be capable of supporting communications between devices using other wireless communication protocols.

[040] FIG. 3 illustrates an exemplary diagram 300 of a method for producing surrounding sound by a Bluetooth hub, in accordance with an embodiment of the present disclosure. As shown in FIG. 3, the Bluetooth hub 320 is configured to split the music stream into multiple audio channels and transmit the audio channels to respective Bluetooth speakers 310A-310D to create a surrounding sound effect. As an example, Bluetooth speakers 310A-310D may be scattered at different corners of an indoor area. In this example, the music stream is split into four channels, where channel 1 is transmitted to Bluetooth speaker 310C, channel 2 is transmitted to Bluetooth speaker 310D, channel 3 is transmitted to Bluetooth speaker 31 OA, and channel 4 is transmitted to Bluetooth speaker 31 OB. In some implementations, a non-Bluetooth speaker may be used to receive the audio channel from the Bluetooth hub 320 by attaching a Bluetooth audio adapter to the non-Bluetooth speaker.

[041 ] In some embodiments, the Bluetooth hub 320 may also be configured to communicate with Bluetooth light to change the color and brightness of the bulbs so as to create a particular mood effect. For example, the Bluetooth hub 320 may be configured to change the color of the Bluetooth lights based on the beat of the music that is being played.

[042] In some embodiments, the Bluetooth hub 320 may receive the audio data from a Bluetooth enabled client device, such as a smart phone, a tablet or a computer that supports Bluetooth. For example, the audio data may be stored locally at the Bluetooth enabled client device, and the Bluetooth hub 320 may receive the audio data from the Bluetooth enabled client device via a Bluetooth air interface.

[043] In other embodiments, the Bluetooth hub 320 may receive audio data by online music streaming. For example, the Bluetooth hub 320 may connect to music service sites on the Internet, stream music from the music service sites, and transmit audio signals to various Bluetooth speakers and/or Bluetooth headsets. Further, a user may select the music service site which the Bluetooth hub 320 streams music from by controlling the setting of the Bluetooth hub 320, for example, via a cloud-based server or via a direct connection with the Bluetooth hub using a Bluetooth enabled client device. The Bluetooth hub 320 may be subject to control of multiple users simultaneously. For example, user A may select a music service site for the Bluetooth hub 320 to stream online music, and subsequently user B may change the selected music service site by changing the setting of the Bluetooth hub 320 via a cloud-based server associated with the Bluetooth hub.

[044] As shown in FIG. 3, the Bluetooth hub 320 may be configured to transmit different audio channels to different Bluetooth speakers. In some implementations, the Bluetooth hub 320 may be configured to transmit the same audio signal to various Bluetooth audio devices, such as Bluetooth speakers and/or Bluetooth headsets. For example, the Bluetooth hub 320 may be configured to transmit the same audio signal to various Bluetooth speakers located in different rooms of a house such that the same music is played in the entire house. In other implementations, the Bluetooth hub 320 may be configured to transmit different audio signal to various Bluetooth audio devices at the same time. For example, the Bluetooth hub 320 may be configured to transmit a piece of dancing music to a Bluetooth speaker located in the entertainment room and simultaneously transmit a piece of classical music to another Bluetooth speaker located in the bedroom.

[045] The Bluetooth hub 320 may be connected to the Bluetooth speakers 310A-310D by performing a Bluetooth pairing procedure, which allows a Bluetooth slave device (e.g., the Bluetooth speaker) to be paired with a Bluetooth master device (e.g., the Bluetooth hub). Once a pairing procedure is completed, the paring information may be stored in the Bluetooth hub 320 and/or in a cloud-based server, and no additional pairing may be required in future to establish communication between the Bluetooth hub and the Bluetooth speakers.

[046] In some embodiments, a user of the Bluetooth hub may share control of a Bluetooth audio device with another user. For example, a user may share control of a Bluetooth speaker with another user such that the other user may change the music played by the Bluetooth hub remotely through the cloud-based server associated with the Bluetooth hub.

[047] In some embodiments, the Bluetooth hub 320 may be configured with a music playing mode for transmitting a particular combination of music and lighting control to the Bluetooth devices. For example, the Bluetooth hub 320 may be configured with a wake-up mode, which gradually increases volume of the corresponding Bluetooth speaker and intensity of the corresponding Bluetooth lighting. As another example, the Bluetooth hub 320 may be configured with a sleep mode, which gradually decreases volume of the corresponding Bluetooth speaker and intensity of the corresponding Bluetooth lighting. As another example, the Bluetooth hub 320 may be configured to play different types of music based on weather, user's mood, or the like. Other examples of applications of the Bluetooth hub include leaving a voice mail that is to be played via the Bluetooth speaker, playing online Karaoke television (KTV), and so on.

[048] In some embodiments, an application may be installed on a client device, such as a smart phone, to manage operations of the Bluetooth hub and Bluetooth devices paired with the Bluetooth hub. During initial set up of the Bluetooth hub, a user may use the application to configure a WiFi network for the Bluetooth hub, and the Bluetooth hub may be configured to automatically scan available Bluetooth devices within its communication range. In some implementations, the Bluetooth hub may be configured to scan for only Bluetooth audio devices and LED lights nearby, and to ignore the other types of Bluetooth devices even if they are detected.

[049] FIG. 4 illustrates an exemplary diagram 400 of a user interface for managing Bluetooth devices, in accordance with an embodiment of the present disclosure. For example, the user interface may be displayed in a client device when an application associated with the Bluetooth hub is started. In some embodiments, the Bluetooth audio devices may be divided into different groups, and the same audio signal may be transmitted from the Bluetooth hub to the Bluetooth audio devices in the same group. As shown in FIG. 4, the default setting of the Bluetooth hub may include a single group represented by a circle on the user interface, and when a user drags the icon representing the Bluetooth audio device to the plus sign on the user interface, a new group may be created.

[050] FIG. 5 illustrates another exemplary diagram 500 of a user interface for managing Bluetooth devices, in accordance with an embodiment of the present disclosure. As shown in FIG. 5, a new group is created as a result of the user's input. It can be seen that there are a total of two groups of Bluetooth audio devices associated with the Bluetooth hub, represented by the two circles on the user interface. The first group contains two Bluetooth audio devices, as indicated by the number of icons representing the Bluetooth audio devices displayed next to the circle on the top of the diagram. The second group contains zero Bluetooth audio devices, as there are no icons representing the Bluetooth audio devices displayed next to or within the circle representing the second group. In some implementations, if no Bluetooth audio devices are present in a group for a predetermined time period, the group may be removed and may be disappeared from the user interface. In some embodiments, a maximum number of groups may be configured for the Bluetooth hub, and once the maximum number is reached, a user may not be able to create new groups unless one or more existing groups are removed.

[051 ] FIG. 6 illustrates an exemplary diagram 600 of a user interface for playing music with a Bluetooth device, in accordance with an embodiment of the present disclosure. For example, the song titled "Here Comes the Weekend" is being transmitted to the two Bluetooth audio devices in group 1 for playing. The user interface displays the title of the song, the title of the album, the artist performing the song, and the play progress of the song. In some implementations, the color of the background in the user interface may be set to indicate the play progress of the song. The user interface may include a selectable element for the user to switch to the next song or the previous song, such as the right arrow icon and left arrow icon shown in the diagram 600. In some implementations, the song may be paused by tapping or clicking the album cover shown in the user interface. There may also be a volume icon shown in the user interface for the user to adjust the volume of the song played by the Bluetooth audio devices. When multiple Bluetooth audio devices are playing the song simultaneously, the volume icon may be expanded upon the user's selection such that the volume of each Bluetooth audio devices may be adjusted individually. If the song is retrieved from an online music service site which allows the user to express like or dislike of the song, an icon may be displayed on the user interface such that the user may tap or click the icon to add the song to the favorites list or to remove the song from future play list. Multiple modes may be supported by the application associated with the Bluetooth hub, including sequential mode, shuffle mode, repeat mode, one song repeating mode, or the like.

[052] FIG. 7 illustrates an exemplary diagram 700 of a user interface for controlling Bluetooth devices, in accordance with an embodiment of the present disclosure. As shown in FIG. 7, multiple sections may be included in the user interface. The user interface may include a list of Bluetooth devices in a group. For example, group 1 includes two Bluetooth audio devices and one Bluetooth LED light. The user interface allows the user to check current status of the Bluetooth devices. For example, if the Bluetooth device is an audio device, by selecting the Bluetooth device, the user interface may display the current status of the Bluetooth device as playing, deactivated, or muted. As another example, if the Bluetooth device is a LED light, by selecting the Bluetooth device, the user interface may display the current status of the Bluetooth device as light on or light off.

[053] Another section included in the user interface may include general setting of the Bluetooth devices. For example, the general setting section may allow a user to select and/or change icons used to represent the Bluetooth devices, to activate or deactivate a particular Bluetooth device, to test the function of the

Bluetooth devices, and so on. In the test mode, if the Bluetooth device is an audio device and is selected, a test sound may be generated by the Bluetooth device. If the Bluetooth device is a LED light and is selected for testing, the LED light may start flashing to indicate a normal operation status.

[054] The user interface may also include a section to adjust the setting of each Bluetooth device individually. For example, for a Bluetooth audio device, the device setting may allow the user to adjust the volume of the audio device. As another example, for a Bluetooth LED light, the device setting may allow the user to adjust the intensity of the light in a sliding bar, adjust the color of the light by a color palette, or the like. Further, an automatic theme may be set for the Bluetooth LED light, such that the Bluetooth LED light may flash based on the music currently played by the Bluetooth audio device. For example, the Bluetooth LED light may identify the genre of the music based on the tag provided by the application programming interface (API) associated with the music, and set the theme based on the genre of the music. As another example, the Bluetooth LED light may adjust its color and brightness based on the rhythm of the music, such as using warm color and changing the color rapidly for fast rhythm, using cold color and changing the color slowly for slow rhythm, or the like. A customized theme may also be set for the Bluetooth LED light, where a predefined light color setting and/or flashing mode may be defined by the user in advance for a predefined theme, such as jazz, rock, and so on.

[055] FIG. 8 illustrates an exemplary diagram 800 of a user interface for selecting music to be played by a Bluetooth device, in accordance with an

embodiment of the present disclosure. As described above, the Bluetooth hub may play music stored in a Bluetooth enabled client device or perform online music streaming using Internet music service sites. In this example, the music source is from an Internet music service site "Douban.fm." As shown in FIG. 8, the music listed in the Internet music service site is displayed in the user interface for the user to select music to be played by a Bluetooth device. If a user selects a link of a particular category of the music, the music in that category may be expanded in the user interface. A right arrow may be displayed in the user interface to indicate that the category or list may be expanded upon selection. If a link of a particular category of the music is not expandable, the music in that category may be played upon user selection of the link.

[056] In some embodiments, if a user has set its user account in the

Bluetooth hub for accessing the Internet music service site, the Bluetooth hub may access the music in the Internet music service site using the user's account. If a user account has not been set in the Bluetooth hub for accessing the Internet music service site, the Bluetooth hub may send a message to the client device and cause a prompt message to be displayed on the client device. The prompt message may request the user to enter user account information for accessing the Internet music service site, and after the user account information is entered, the information may be stored in the Bluetooth hub.

[057] In some embodiments, when music is being played in one or more Bluetooth audio devices, and an incoming call is received by the client device, the Bluetooth hub may reduce the volume of the Bluetooth audio devices until the call is terminated. Further, in some embodiments, the Bluetooth audio devices in all the groups may be configured to play the same music synchronously. If the user selects another group and/or another song for playing, the synchronous playing by the Bluetooth audio devices may be terminated.

[058] FIG. 9 is a flowchart of an exemplary method 900 for providing audio data to a plurality of Bluetooth devices, in accordance with an embodiment of the present disclosure. The method 900 may be performed by the Bluetooth hub 200 described above in connection with FIG. 2.

[059] At step 902, the Bluetooth hub receives a user input from a client device, where the user input identifies a plurality of Bluetooth audio devices for playing audio data. For example, the Bluetooth hub may receive the user input from a network (e.g., network 150), via a network interface. As another example, the client device may be a Bluetooth-enabled client device (e.g., client device 1 10), and the Bluetooth hub may receive the user input from the client device via one or more Bluetooth transceivers. In some embodiments, the client device may provide a user interface for a user to select a group of Bluetooth audio devices for playing the audio data. For example, as illustrated in FIG. 6, the client device may provide a user interface that allows a user to select a room to play the audio data, where the room may contain a group of Bluetooth audio devices. [060] At step 904, the Bluetooth hub receives the audio data via at least one network interface. For example, the Bluetooth hub may receive the audio data from the Internet by performing online audio and/or music streaming. As another example, the Bluetooth hub may receive the audio data by accessing a remote cloud-based network system. In other embodiments, the Bluetooth hub may receive the audio data from a Bluetooth-enabled client device via one or more Bluetooth transceivers.

[061] At step 906, the Bluetooth hub decodes the audio data for audio playing. For example, a media player may be implemented in the Bluetooth hub to decode audio and/or video files.

[062] At step 908, the Bluetooth hub transmits the decoded audio data to the plurality of Bluetooth audio devices via the one or more Bluetooth transceivers. In some embodiments, the same decoded audio data may be transmitted to the plurality of Bluetooth audio devices, such that the plurality of Bluetooth audio devices may play the decoded audio data at substantially the same time. In other embodiments, different decoded audio data may be transmitted to each of the plurality of Bluetooth audio devices to produce a surrounding sound effect, which will be described in more details in connection with FIG. 1 1.

[063] In some embodiments, the Bluetooth hub may receive a user input identifying an audio playing mode associated with the audio data. For example, the user input received in step 902 may also identify an audio playing mode associated with the audio data. As another example, a separate user input from that in step 902 may be received to identify an audio playing mode.

[064] In some embodiments, the identified audio playing mode may be a sleep mode. In response, the Bluetooth hub may cause a volume of each of the plurality of Bluetooth audio devices to decrease gradually, for example, by sending one or more volume control commands to the Bluetooth audio devices. In other embodiments, the identified audio playing mode may be a wake-up mode. In response, the Bluetooth hub may cause a volume of each of the plurality of

Bluetooth audio devices to increase gradually, for example, by sending one or more volume control commands to the Bluetooth audio devices.

[065] In some embodiments, the Bluetooth hub may receive a user input identifying a theme associated with the audio data, such that a particular mood effect may be created by the Bluetooth hub. For example, the user input received in step 902 may also identify a theme associated with the audio data. As another example, a separate user input from that in step 902 may be received to identify a theme. In response to the theme identified in the user input, the Bluetooth hub may adjust, based on the theme, a light intensity and/or a color of a plurality of Bluetooth lighting devices via the one or more Bluetooth transceivers. For example, the Bluetooth hub may change the color of the Bluetooth lighting devices based on the beat of the music that is being played.

[066] FIG. 10 is a flowchart of an exemplary method 1000 for receiving audio data by a Bluetooth hub, in accordance with an embodiment of the present disclosure. The method 1000 may be performed by the Bluetooth hub 200 described above in connection with FIG. 2.

[067] At step 1002, the Bluetooth hub sends a request to a client device for user account information associated with the audio data. For example, the source of the audio data may be from an Internet music service site, and the Bluetooth hub may send a request to the client device requesting the user account information for accessing the Internet music service site. As another example, the source of the audio data may be from a cloud-based network, and the Bluetooth hub may send a request to the client device requesting the user account information for accessing the cloud-based network. In some embodiments, the client device may provide a user interface for a user to enter the user account information. For example, a prompt message may be displayed on the client device prompting the user to enter the account information for the Bluetooth hub to access the Internet music service site.

[068] At step 1004, the Bluetooth hub receives the user account information from the client device. The Bluetooth hub may store the received user account information such that it may use the stored information to access the Internet music service site in future.

[069] At step 1006, the Bluetooth hub retrieves, based on the user account information, the audio data from Internet via at least one network interface. After the audio data is retrieved, the Bluetooth hub may perform steps 906 and 908 described above in connection with FIG. 9 so as to provide the audio data to Bluetooth audio devices for audio playing.

[070] FIG. 1 1 is a flowchart of an exemplary method 1 100 for producing a surrounding sound effect by a Bluetooth hub, in accordance with an embodiment of the present disclosure. The method 1 100 may be performed by the Bluetooth hub 200 described above in connection with FIG. 2.

[071] At step 1 102, the Bluetooth hub obtains a plurality of audio channels based on decoded audio data, where each of the audio channels includes a portion of the decoded audio data. For example, the Bluetooth hub may split the decoded audio data into multiple audio channels, and each of the audio channels includes different portion of the decoded audio data. [072] At step 1 104, the Bluetooth hub determines an audio channel associated with each of the plurality of Bluetooth audio devices. For example, the Bluetooth hub may determine the audio channels associated with the Bluetooth audio devices based on the locations of the Bluetooth audio devices. In some implementations, the Bluetooth audio devices may be placed at different corners of an indoor area, and the Bluetooth hub may determine the audio channels associated with the Bluetooth audio devices based on the positions of the Bluetooth audio devices in the indoor area.

[073] At step 1 106, the Bluetooth hub transmits the portion of the decoded audio data corresponding to the associated audio channel to each of the plurality of Bluetooth audio devices. Thus, each of the Bluetooth audio devices receives audio data corresponding to a particular audio channel, and when the Bluetooth audio devices play simultaneously, a surrounding sound effect may be produced.

[074] The specification has described methods, devices, and systems for Bluetooth audio transmission. The illustrated steps are set out to explain the exemplary embodiments shown, and it should be anticipated that ongoing technological development will change the manner in which particular functions are performed. Thus, these examples are presented herein for purposes of illustration, and not limitation. For example, steps or processes disclosed herein are not limited to being performed in the order described, but may be performed in any order, and some steps may be omitted, consistent with disclosed embodiments. Further, the boundaries of the functional building blocks have been arbitrarily defined herein for the convenience of the description. Alternative boundaries can be defined so long as the specified functions and relationships thereof are appropriately performed. Alternatives (including equivalents, extensions, variations, deviations, etc., of those described herein) will be apparent to persons skilled in the relevant art(s) based on the teachings contained herein. Such alternatives fall within the scope and spirit of the disclosed embodiments.