TWI813347B - Bluetooth audio broadcasting system supporting bluetooth low energy audio broadcasting operations and capable of avoiding user from missing external alert signals or specific sounds - Google Patents

Abstract

A Bluetooth audio broadcasting system includes: an audio broadcasting device arranged to operably broadcast BLE (Bluetooth Low Energy) audio packets; a first Bluetooth member device arranged to operably parse the BLE audio packets to acquire a predetermined audio data and to operably control a first audio playback circuit to playback the predetermined audio data; and a second Bluetooth member device arranged to operably parse the BLE audio packets to acquire the predetermined audio data and to operably control a second audio playback circuit to playback the predetermined audio data. When the first or second Bluetooth member device receives an alert signal, or when a specific ambient sound occurs in the surrounding environment of the first or second Bluetooth member device, the audio broadcasting device will utilize a target control command to instruct the first and second Bluetooth member devices to synchronously reduce their volume to be lower than a predetermined threshold.

Description

A Bluetooth audio broadcast system that supports low-power Bluetooth audio broadcast operation and prevents users from missing external alarm signals or specific sounds.

The present invention relates to Bluetooth technology, and in particular, to a Bluetooth audio broadcast system and related multi-member Bluetooth devices that support Bluetooth Low Energy (BLE) audio broadcast operation and prevent users from missing external alarm signals or specific sounds. .

Bluetooth technology is divided into two major categories, one is Classic Bluetooth/Legacy Bluetooth technology, and the other is Bluetooth Low Energy (BLE) technology. BLE technology and Bluetooth traditional technology are not compatible with each other (or not completely compatible), but the two technologies can coexist in the same Bluetooth device or the same Bluetooth chip. In other words, a single Bluetooth device or a single Bluetooth chip can be designed to support both BLE technology and Bluetooth legacy technology, or it can be designed to support only one of the Bluetooth communication standards.

The newly launched Bluetooth Low Energy Audio (Bluetooth LE Audio, BLE Audio) technology (hereinafter referred to as BLE audio technology) based on the Bluetooth core specification version 5.2 is a major update to the audio transmission technical specifications over the past 20 years of Bluetooth technology development. The main advantage of BLE audio technology is that it can transmit higher quality audio while significantly reducing power consumption. In addition, BLE audio technology also uses a new mechanism called Broadcast Isochronous Stream (BIS) to perform audio broadcast operations. Use much Member Bluetooth devices receive and play audio broadcast content using BLE audio technology, which is one of the main development directions of Bluetooth-related applications in the future. The aforementioned multi-member Bluetooth device refers to a Bluetooth device composed of multiple Bluetooth circuits used in conjunction with each other, such as pairs of Bluetooth headsets, groups of Bluetooth speakers, etc.

As we all know, BLE audio technology does not standardize how to flexibly adjust the volume playback of the audio receiving end when using BIS for audio broadcasting. Of course, BLE audio technology does not have standards for how to synchronously adjust the volume playback of different Bluetooth member devices in a multi-member Bluetooth device when using BIS for audio broadcast. It is foreseeable that certain problems may arise when using BLE audio technology to implement audio broadcasting. For example, audio broadcasts with unpredictable volume may cause some users to feel uncomfortable or unhappy, and some users may even be frightened by receiving sudden and excessively loud audio broadcasts. Furthermore, different users have different sensitivity and tolerance levels to volume, so a single volume setting obviously cannot meet the needs of different users at the same time.

Therefore, when using a multi-member Bluetooth device to receive and play audio broadcasts using BLE audio technology, if the volume playback of different Bluetooth member devices in the multi-member Bluetooth device cannot be adjusted flexibly and synchronously, it will have a negative impact on the use of BLE audio technology in audio broadcasts. This poses a serious obstacle to the development prospects in applications.

On the other hand, when a user listens to an audio broadcast played by a multi-member Bluetooth device, the user's attention to external sounds will inevitably be reduced, and sometimes the user may even not notice the external sounds at all. At this time, if an emergency event occurs suddenly outside (for example, air strikes, fires, tsunamis, etc.), the user may be in a dangerous situation or delay the response time because he does not hear the outside alarm sound.

In view of this, how to prevent users from missing external alarm signals or specific sounds when using multi-member Bluetooth devices to receive and play audio broadcasts using BLE audio technology is a problem that needs to be solved.

This specification provides an embodiment of a Bluetooth audio broadcast system, which includes: an audio broadcast device configured to broadcast one or more low-power Bluetooth audio packets through a broadcast isochronous streaming logical transmission channel; a first A Bluetooth member device includes: a first Bluetooth communication circuit configured to receive the one or more low-power Bluetooth audio packets; a first audio processing circuit; and a first control circuit coupled to the first The Bluetooth communication circuit and the first audio processing circuit are configured to parse the one or more low-power Bluetooth audio packets received by the first Bluetooth communication circuit to obtain a predetermined audio data, and instruct the first audio processing circuit Control a first audio playback circuit to play the predetermined audio data; and a second Bluetooth member device, which includes: a second Bluetooth communication circuit configured to receive the one or more low-power Bluetooth audio packets; a second an audio processing circuit; and a second control circuit, coupled to the second Bluetooth communication circuit and the second audio processing circuit, configured to analyze the one or more low-power Bluetooth signals received by the second Bluetooth communication circuit The audio packet is used to obtain the predetermined audio data, and instructs the second audio processing circuit to control a second audio playback circuit to play the predetermined audio data; wherein, the audio broadcast device is also configured to be able to play the predetermined audio data on the first Bluetooth member device or the third Bluetooth member device. When the two Bluetooth member devices receive an alarm signal, or when a specific environmental sound occurs in the surrounding environment of the first Bluetooth member device or the second Bluetooth member device, a target control command is generated and transmitted to the first Bluetooth member device. Member device and the second Bluetooth member device; wherein the first Bluetooth communication circuit is further configured to receive the target control command, and the first control circuit is further configured to control the first audio processing according to the target control command. The circuit reduces a volume of the first audio playback circuit below a predetermined threshold; wherein, the second Bluetooth communication circuit is also configured to receive the target control command, and the second control circuit is also configured to receive the target control command according to the The target control instruction controls the second audio processing circuit to reduce a volume of the second audio playing circuit below the predetermined threshold value.

One of the advantages of the above embodiment is that the audio broadcast device can be used when the first Bluetooth member device or the second Bluetooth member device receives an alarm signal, or when the first Bluetooth member device or the second Bluetooth member device receives an alarm signal. A specific ambient sound is generated in the surrounding environment of the device At this time, the target control command is used to instruct the first Bluetooth member device and the second Bluetooth member device to synchronously reduce the volume below a predetermined threshold value. Therefore, the user can be prevented from missing alarm signals or specific sounds from the outside world. Being in a dangerous situation or delaying the response time.

Other advantages of the present invention will be explained in more detail in conjunction with the following description and drawings.

100, 400, 500, 600, 700, 800, 900, 1100: Bluetooth audio broadcasting system

110: first Bluetooth member device

111: first Bluetooth communication circuit

112: first audio processing circuit

113: first audio playback circuit

114: first control circuit

120: second Bluetooth member device (second Bluetooth member device)

121: Second Bluetooth communication circuit (second Bluetooth communication circuit)

122: Second audio processing circuit (second audio processing circuit)

123: Second audio playback circuit

124: Second control circuit (second control circuit)

130: third Bluetooth member device

140: fourth Bluetooth member device

150:audio broadcasting device

152, 472: detection circuit

202~234, 302~314, 1002, 1012~1016, 1026~1036: operation process

470, 570: audio source device

560, 960, 970: host device

561, 961: communication circuit

563, 963: detection circuit (detection circuit)

565, 965: processing circuit

715: first wireless communication circuit

716: first detection circuit (first detection circuit)

725: Second wireless communication circuit (second wireless communication circuit)

726: second detection circuit (second detection circuit)

763, 1163: input circuit

FIG. 1 is a simplified functional block diagram of a Bluetooth audio broadcast system according to a first embodiment of the present invention.

2 to 3 are simplified flow charts of a method for audio broadcasting using BLE audio technology according to a first embodiment of the present invention.

FIG. 4 is a simplified functional block diagram of a Bluetooth audio broadcast system according to a second embodiment of the present invention.

FIG. 5 is a simplified functional block diagram of a Bluetooth audio broadcast system according to a third embodiment of the present invention.

FIG. 6 is a simplified functional block diagram of a Bluetooth audio broadcast system according to a fourth embodiment of the present invention.

FIG. 7 is a simplified functional block diagram of a Bluetooth audio broadcast system according to a fifth embodiment of the present invention.

FIG. 8 is a simplified functional block diagram of a Bluetooth audio broadcast system according to a sixth embodiment of the present invention.

FIG. 9 is a simplified functional block diagram of a Bluetooth audio broadcast system according to a seventh embodiment of the present invention.

FIG. 10 is a simplified flow chart of a method for audio broadcasting using BLE audio technology according to a second embodiment of the present invention.

FIG. 11 is a simplified functional block diagram of a Bluetooth audio broadcast system according to an eighth embodiment of the present invention.

Figure 12 shows a method of using BLE audio technology for audio broadcasting according to a third embodiment of the present invention. Simplified flow chart.

The embodiments of the present invention will be described below with reference to relevant drawings. In the drawings, the same reference numbers represent the same or similar elements or process flows.

FIG. 1 is a simplified functional block diagram of a Bluetooth audio broadcast system 100 according to a first embodiment of the present invention. The Bluetooth audio broadcast system 100 includes a plurality of Bluetooth member devices that can receive audio broadcasts, and an audio broadcast device 150 for broadcasting audio data. The audio broadcasting device 150 is configured to use low-power Bluetooth audio (Bluetooth LE Audio, BLE Audio) technology (hereinafter referred to as BLE audio technology) specified in the Bluetooth core specification version 5.2 or a newer version to broadcast audio data of various contents. , for example, flight information in the airport, flight reminder notices in the train station or high-speed rail station, plot sounds in the cinema, voice information in the stadium, guide voices in the museum, introduction voices in the exhibition venue, voice translation at the lecture venue , music or voice data selected by the user, multi-channel audio provided by the TV, teacher's class content in the classroom, or other types of audio content, etc.

Multiple Bluetooth member devices in the Bluetooth audio broadcast system 100 all support the BLE technology specified in Bluetooth core specification version 5.2 or newer versions, and can receive and play audio data broadcast by the audio broadcast device 150 . In practice, the Bluetooth audio broadcast system 100 may include two or more Bluetooth member devices. For convenience of explanation, only four exemplary Bluetooth member devices are shown in the embodiment of FIG. 1 , which are a first Bluetooth member device 110 , a second Bluetooth member device 120 , and a third Bluetooth member device 130 . , and a fourth Bluetooth member device 140.

In practical applications, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140 can jointly form a multi-member Bluetooth device, for example, a group of multi-member Bluetooth devices. Channel Bluetooth speaker. In this case, the first Bluetooth member device 110 , the second Bluetooth member device 120 , the third Bluetooth member device 130 , and the fourth Bluetooth member device 140 can use various methods that comply with the Bluetooth communication standards. A Bluetooth piconet is established by a method, and various instructions or data can be transmitted through the Bluetooth piconet, or the first Bluetooth member device 110, the second Bluetooth member device 120, the third Bluetooth member device 130, and The fourth Bluetooth member devices 140 may jointly form a coordination set that complies with various Bluetooth communication standards.

Alternatively, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140 may also belong to different multi-member Bluetooth devices respectively. For example, the aforementioned first Bluetooth member device 110 and the second Bluetooth member device 120 may together form a first multi-member Bluetooth device (for example, a pair of Bluetooth headsets), and the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device The devices 140 may together form a second multi-member Bluetooth device (eg, another pair of Bluetooth headsets). In this case, the first Bluetooth member device 110 and the second Bluetooth member device 120 can use various methods that comply with the Bluetooth communication standard to establish a first Bluetooth micronet, and can perform various instructions or instructions through the first Bluetooth micronet. Data transfer. On the other hand, the third Bluetooth member device 130 and the fourth Bluetooth member device 140 can establish a second Bluetooth micronet using various methods that comply with the Bluetooth communication standard, and can perform various instructions or data through the second Bluetooth micronet. transmission. Alternatively, the first Bluetooth member device 110 and the second Bluetooth member device 120 may jointly form a first collaboration group that complies with various Bluetooth communication standards, and the third Bluetooth member device 130 and the fourth Bluetooth member device 140 may jointly form a first collaboration group. A second collaboration group that complies with various Bluetooth communication standards.

In the embodiment of FIG. 1 , the first Bluetooth member device 110 includes a first Bluetooth communication circuit 111 , a first audio processing circuit 112 , a first audio playback circuit 113 , and a first control circuit 114 . Similarly, the second Bluetooth member device 120 includes a second Bluetooth communication circuit 121, a second audio processing circuit 122, a second audio playback circuit 123, and a second control circuit 124.

In the first Bluetooth member device 110, the first Bluetooth communication circuit 111 is configured to receive audio information broadcast by the audio broadcast device 150 using BLE audio technology in a Bluetooth communication manner. material. The first audio processing circuit 112 is coupled to the first audio playing circuit 113 and is configured to process the audio data transmitted from the audio broadcast device 150 (for example, perform encoding or decoding operations on the audio data, and/or perform data format conversion) , and can control the first audio playing circuit 113 to play audio data. The first control circuit 114 is coupled to the first Bluetooth communication circuit 111 and the first audio processing circuit 112, and is configured to parse the Bluetooth packets received by the first Bluetooth communication circuit 111 to obtain relevant data or instructions, and to control Operation of the first audio processing circuit 112.

In some embodiments, the first control circuit 114 is further configured to control the first Bluetooth member device 110 to act as a Bluetooth central device (Bluetooth Central) in a Bluetooth micronet, and to adjust the usage of the first Bluetooth member device 110 . A clock signal is used to synchronize the piconet clock used between the first Bluetooth member device 110 and other Bluetooth devices.

The first control circuit 114 can communicate with other Bluetooth member devices through the first Bluetooth communication circuit 111 . The first control circuit 114 can also use the first audio processing circuit 112 to process the audio data transmitted from the audio broadcast device 150, and instruct the first audio processing circuit 112 to control the first audio playing circuit 113 to play the audio data.

In the second Bluetooth member device 120, the second Bluetooth communication circuit 121 is configured to receive audio data broadcast by the audio broadcasting device 150 using BLE audio technology in a Bluetooth communication manner. The second audio processing circuit 122 is coupled to the second audio playing circuit 123 and is configured to process the audio data transmitted from the audio broadcast device 150 (for example, perform encoding or decoding operations on the audio data, and/or perform data format conversion) , and can control the second audio playing circuit 123 to play audio data. The second control circuit 124 is coupled to the second Bluetooth communication circuit 121 and the second audio processing circuit 122, and is configured to parse the Bluetooth packets received by the second Bluetooth communication circuit 121 to obtain relevant data or instructions, and to control Operation of the second audio processing circuit 122. In addition, the second control circuit 124 is also configured to adjust the clock signal used by the second Bluetooth member device 120 to synchronize the piconet clock used between the second Bluetooth member device 120 and other Bluetooth devices.

In this embodiment, the second control circuit 124 is further configured to control the second Bluetooth member device 120 to act as a Bluetooth slave device (Bluetooth Peripheral) in the aforementioned Bluetooth micronet, and to adjust the Bluetooth peripheral used by the second Bluetooth member device 120 . The clock signal is used to synchronize the piconet clock used between the second Bluetooth member device 120 and the first Bluetooth member device 110 .

The second control circuit 124 can communicate with other Bluetooth member devices through the second Bluetooth communication circuit 121 . The second control circuit 124 can also use the second audio processing circuit 122 to process the audio data transmitted from the audio broadcast device 150, and instruct the second audio processing circuit 122 to control the second audio playing circuit 123 to play the audio data.

In practice, the aforementioned first Bluetooth communication circuit 111 and second Bluetooth communication circuit 121 can be implemented with a suitable Bluetooth transmission circuit that can support the Bluetooth core specification version 5.2 or a newer version of the Bluetooth communication protocol. The first audio processing circuit 112 and the second audio processing circuit 122 can both use digital arithmetic circuits, microprocessors, or application specific integrated circuits (Application Specific Integrated Circuits) that can perform various encoding and decoding processes on audio data signals and/or convert data formats. Circuit (ASIC) or digital-to-analog converter (DAC). The first audio playing circuit 113 and the second audio playing circuit 123 can be implemented by various suitable circuits capable of receiving and playing audio data, for example, various types of speakers. The first control circuit 114 and the second control circuit 124 can be implemented by various packet processing circuits, digital computing circuits, microprocessors, or special application integrated circuits that have appropriate computing capabilities and can parse and generate Bluetooth packets.

In some embodiments, the aforementioned first Bluetooth communication circuit 111 and second Bluetooth communication circuit 121 can also support earlier Bluetooth versions (for example, Bluetooth 2.0, Bluetooth 3.0, Bluetooth 4.0, Bluetooth 4.2, etc.) ) of the Bluetooth communication protocol is implemented by a suitable Bluetooth transmission circuit. In this case, the aforementioned first control circuit 114 and second control circuit 124 are also designed to be able to parse and generate Bluetooth packets defined by the Bluetooth communication protocol of an earlier Bluetooth version.

In addition, different functional blocks in the aforementioned first Bluetooth member device 110 can be used with different It can be implemented with a circuit and can also be integrated into a single Bluetooth controller IC or a single wearable Bluetooth device (for example, a Bluetooth headset). In addition, if necessary, the first Bluetooth communication circuit 111 can also be coupled to an additional antenna device (not shown). Similarly, the different functional blocks in the second Bluetooth member device 120 can be implemented using different circuits, or can be integrated into a single Bluetooth controller IC or a single wearable Bluetooth device (for example, a Bluetooth headset). )middle. In addition, if necessary, the second Bluetooth communication circuit 121 can also be coupled to an additional antenna device (not shown).

In some embodiments, the aforementioned first audio processing circuit 112 and the second audio processing circuit 122 can also be integrated into the aforementioned first control circuit 114 and the second control circuit 124 respectively.

In other words, the aforementioned first audio processing circuit 112 and first control circuit 114 may be implemented by different circuits, or they may be implemented by the same circuit. Similarly, the aforementioned second audio processing circuit 122 and second control circuit 124 may be implemented by different circuits, or they may be implemented by the same circuit.

The main circuit architecture and implementation of other Bluetooth member devices in the Bluetooth audio broadcast system 100 are similar to the aforementioned first Bluetooth member device 110 or second Bluetooth member device 120 , but different Bluetooth member devices can be configured with different Additional circuit components are not limited to the fact that the circuit structures of all Bluetooth member devices must be exactly the same.

As mentioned above, the audio broadcast device 150 can use the BLE audio technology specified in Bluetooth core specification version 5.2 or a newer version to broadcast various audio data. During operation, the audio broadcast device 150 may broadcast audio data containing audio data through a Broadcast Isochronous Stream (BIS) logical transport (hereinafter referred to as BIS logical transport). One or more Bluetooth LE audio packets.

In practice, the aforementioned audio broadcast device 150 can use a Bluetooth communication protocol that supports Bluetooth core specification version 5.2 or a newer version, and can use BLE audio technology to broadcast audio. It can be realized by various suitable circuits or devices of information data, for example, an audio broadcast system, an audio guide system, a voice broadcast system, a desktop computer, a notebook computer, a tablet computer, a mobile communication device (such as , mobile phone), a wearable device, a car audio system, or a Bluetooth smart speaker, etc.

However, the BLE audio technology introduced in version 5.2 of the Bluetooth core specification does not standardize how the audio source end adjusts the volume playback size of the audio receiving end during the process of using the BIS logical transmission channel for audio broadcast, and it does not require the audio source end. The volume of the audio receiver must be adjusted. Therefore, certain problems may arise when using BLE audio technology for audio broadcasting. For example, audio broadcasts with unpredictable volume may cause some users to feel uncomfortable or unhappy, and some users may even be frightened by receiving sudden and excessively loud audio broadcasts.

In order to solve the blind spots in the audio broadcast application of the existing BLE audio technology in version 5.2 of the Bluetooth core specification, the previously disclosed Bluetooth audio broadcast system 100 will use a special mechanism to perform the broadcast operation of audio data.

The operation of the Bluetooth audio broadcast system 100 will be further explained below with reference to FIGS. 2 to 3 . 2 to 3 are simplified flow charts of a method for audio broadcasting using BLE audio technology according to a first embodiment of the present invention.

In the flow charts of FIG. 2 and FIG. 3 , the process located in the column to which a specific device belongs represents the process performed by the specific device. For example, the part marked in the "Audio Broadcasting Device" field is the process performed by the audio broadcasting device 150; the part marked in the "First Bluetooth Member Device" field is the process performed by the first Bluetooth member device 110. The process performed; the part marked in the "Second Bluetooth member device" field is the process performed by the second Bluetooth member device 120; the foregoing logic is also applicable to other subsequent flow charts.

When the user wants to use the first Bluetooth member device 110 and the second Bluetooth member device 120 to receive audio broadcasts, the first Bluetooth member device 110 can perform the process 202 in Figure 2, and the second Bluetooth member device 120 can perform the process in Figure 2. Process 204 in 2.

In process 202, the first control circuit 114 may control the first Bluetooth communication circuit 111 to enter a predetermined receiving mode.

In process 204, the second control circuit 124 may control the second Bluetooth communication circuit 121 to enter the aforementioned predetermined receiving mode.

The aforementioned scheduled reception mode refers to the device that can be used to receive various Bluetooth advertising packets, various broadcast isochronous streaming protocol data units (PDUs) (hereinafter referred to as BIS protocol data units, BIS PDUs), and/or various broadcasts. Various operating modes of the Broadcast Isochronous Group (BIG) protocol data unit (hereinafter referred to as the BIG protocol data unit, BIG PDU).

For example, the aforementioned predetermined receiving mode may be a low-power extended passive scan (LE Extended Passive Scan) mode, a low-power extended active scan (LE Extended Active Scan) mode, a low-power extended passive scan (LE Extended Active Scan) mode that can be used to receive various Bluetooth advertising packets. consumption extended initiator (LE Extended Initiator) mode, or a periodic scanning (Periodic Scanning) mode. For another example, the aforementioned predetermined reception mode may be to receive various protocol data units through a BIS logical transport channel, and/or may be received through a broadcast isochronous group logical transport channel (hereinafter referred to as BIG logical transport channel, BIG logical transport). The operation mode of receiving various protocol data units, for example, a periodic synchronization (Periodic Synchronization) mode, or a broadcast isochronous group synchronization (BIG Synchronization) mode, etc. Alternatively, the aforementioned predetermined reception mode may also be a combination of the aforementioned various operation modes.

As shown in FIG. 2 , when the audio broadcasting device 150 needs to perform audio broadcasting, the audio broadcasting device 150 can perform the process 206 in FIG. 2 .

In process 206, the audio broadcast device 150 may enter a predetermined transmission mode. The aforementioned predetermined transmission modes refer to various operating modes that can be used to transmit various Bluetooth advertising packets, various BIS protocol data units, and/or various BIG protocol data units.

For example, the aforementioned predetermined transmission mode may be an advertising mode (Advertising mode), a scannable mode (Scannable mode), a connectable mode (Connectable mode). mode), a non-connectable mode (Non-connectable mode), a non-scannable mode (Non-scannable mode), a periodic advertising mode (Periodic Advertising mode), a low-power extended advertising mode (LE Extended Advertising mode) , or a low-power periodic advertising mode (LE Periodic Advertising mode). For another example, the aforementioned predetermined transmission mode may be a Broadcast Isochronous Broadcasting mode that can transmit various BIS protocol data units through the BIS logical transmission channel, and/or can transmit various BIG protocol data units through the BIG logical transmission channel. mode), or a Broadcast Isochronous Synchronization mode. Alternatively, the aforementioned predetermined transmission mode may also be a combination of the aforementioned various operation modes.

In process 208, the audio broadcast device 150 may insert a predetermined volume indication corresponding to a predetermined volume into one or more predetermined data items. The audio broadcasting device 150 can set the aforementioned predetermined volume to a volume that is comfortable and not too loud for most people (for example, about 45 to 60 decibels), and can use various suitable data formats, index values, Or a numerical value to express the aforementioned predetermined volume. During operation, the audio broadcasting device 150 may insert the predetermined volume indication into a single or multiple specific fields of a single predetermined data item, or may insert the predetermined volume indication into specific fields of multiple predetermined data items. In some embodiments, in addition to the predetermined volume indication, the audio broadcasting device 150 may also send a Bluetooth address of the audio broadcasting device 150 and/or an indication that the audio broadcasting device 150 is about to start audio broadcasting. Insert into single or multiple specific fields of the aforementioned single predetermined data item, or insert into specific fields of multiple predetermined data items dispersedly.

For example, in some embodiments in which the aforementioned predetermined data items are various Bluetooth advertising packets, the audio broadcast device 150 may insert the aforementioned predetermined volume indication, the Bluetooth address of the audio broadcast device 150, and/or the indication information into a single In single or multiple specific fields of the Bluetooth advertising packet, or inserted into specific fields of multiple Bluetooth advertising packets.

For another example, the aforementioned predetermined data items are various BIS protocol data units or BIG protocol In some embodiments of the data unit, the audio broadcast device 150 may insert the aforementioned predetermined volume indication, the Bluetooth address of the audio broadcast device 150, and/or the indication information into a single BIS protocol data unit or a single BIG protocol data unit. Or multiple specific fields, or dispersedly inserted into specific fields of multiple BIS protocol data units or BIG protocol data units. In practice, the aforementioned specific fields may be the event counter (Event Counter) field, sub-event counter (Sub-Event Counter) field, or payload counter (Payload Counter) in the BIS protocol data unit or BIG protocol data unit. Column etc.

In process 210, the audio broadcasting device 150 may transmit the aforementioned one or more predetermined data items in a predetermined transmission mode, so that the first Bluetooth member device 110 within the Bluetooth signal transmission range of the audio broadcasting device 150 and The second Bluetooth member device 120 and other Bluetooth devices (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140) can receive the aforementioned one or more predetermined data items.

For example, in some embodiments in which the aforementioned predetermined transmission mode is a scannable mode, a connectable mode, a non-connectable mode, or a non-scannable mode, one or more predetermined data referred to in the aforementioned processes 208 and 210 The item may be one or more auxiliary advertising indication (AUX_ADV_IND) packets. Alternatively, the one or more predetermined data items referred to in the aforementioned processes 208 and 210 may also be one or more extended advertising indication (ADV_EXT_IND) packets and one or more auxiliary advertising indications (AUX_ADV_IND). A group of packets formed by packets.

In this case, if the aforementioned predetermined reception mode is a low-power extended passive scanning mode, a low-power extended active scanning mode, or a low-power extended initiator mode, then the first Bluetooth communication circuit 111 and the second Bluetooth communication The circuit 121 may perform process 212 to receive one or more predetermined data items from the audio broadcast device 150 .

For another example, in some embodiments in which the aforementioned predetermined transmission mode is a non-connectable mode or a non-scannable mode, the one or more predetermined data items referred to in the aforementioned processes 208 and 210 may be one or more auxiliary chain indication (auxiliary chain indication, AUX_CHAIN_IND) packet. Alternatively, the one or more predetermined data items referred to in the aforementioned processes 208 and 210 may also be one or more advertising extension indication (ADV_EXT_IND) packets, one or more auxiliary advertising indication (AUX_ADV_IND) packets, and one or A group of packets formed by multiple auxiliary link indication (AUX_CHAIN_IND) packets.

In this case, if the aforementioned predetermined receiving mode is the low-power extended passive scanning mode, the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 can perform the process 212 to receive an or transmitted signal from the audio broadcast device 150 Multiple reservation data items.

For another example, in some embodiments where the aforementioned predetermined transmission mode is a scannable mode, the one or more predetermined data items referred to in the aforementioned process 208 and process 210 may be one or more auxiliary scan responses (auxiliary scan). response, AUX_SCAN_RSP) packet. Alternatively, the one or more predetermined data items referred to in the aforementioned processes 208 and 210 may also be one or more advertising extension indication (ADV_EXT_IND) packets, one or more auxiliary advertising indication (AUX_ADV_IND) packets, and one or A group of packets formed by multiple auxiliary scan response (AUX_SCAN_RSP) packets. Alternatively, the one or more predetermined data items referred to in the aforementioned process 208 and process 210 may also be formed by one or more auxiliary scan response (AUX_SCAN_RSP) packets and one or more auxiliary link indication (AUX_CHAIN_IND) packets. A set of packets. Alternatively, the one or more predetermined data items referred to in the aforementioned processes 208 and 210 may also be one or more advertising extension indication (ADV_EXT_IND) packets, one or more auxiliary advertising indication (AUX_ADV_IND) packets, one or more A group of packets formed by an auxiliary scan response (AUX_SCAN_RSP) packet and one or more auxiliary link indication (AUX_CHAIN_IND) packets.

In this case, if the aforementioned predetermined receiving mode is the low-power extended active scanning mode, the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 can perform the process 212 to receive an or transmitted signal from the audio broadcast device 150 Multiple reservation data items.

For another example, the aforementioned predetermined transmission mode is a non-connectable mode, a non-scannable mode, In some embodiments of periodic advertising mode, low power consumption extended advertising mode, or low power consumption periodic advertising mode, one or more predetermined data items referred to in the aforementioned process 208 and process 210 may be one or more An auxiliary synchronous indication (AUX_SYNC_IND) packet. Alternatively, the one or more predetermined data items referred to in the aforementioned processes 208 and 210 may also be one or more advertising extension indication (ADV_EXT_IND) packets, one or more auxiliary advertising indication (AUX_ADV_IND) packets, and one or A group of packets formed by multiple AUX_SYNC_IND packets.

In this case, if the aforementioned scheduled reception mode is a periodic scanning mode, the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 can perform the process 212 to receive one or more scheduled messages from the audio broadcast device 150 Data items.

For another example, in some embodiments in which the aforementioned predetermined transmission mode is the advertising mode specified by the Bluetooth communication protocol of Bluetooth version 4.0, one or more predetermined data items referred to in the aforementioned process 208 and process 210 may be a or multiple advertising indication (ADV_IND) packets, one or more non-connectable advertising indication (ADV_NONCONN_IND) packets, or one or more discoverable advertisement indication (ADV_DISCOVER_IND) packets . Alternatively, the one or more predetermined data items referred to in the aforementioned process 208 and process 210 may also be formed by one or more advertising indication (ADV_IND) packets and one or more non-connectable advertising indication (ADV_NONCONN_IND) packets. A set of packets. Alternatively, the one or more predetermined data items referred to in the aforementioned processes 208 and 210 may also be formed by one or more advertising indication (ADV_IND) packets and one or more searchable advertising indication (ADV_DISCOVER_IND) packets. A set of packets. Alternatively, the one or more predetermined data items referred to in the aforementioned process 208 and process 210 may also be one or more advertising indication (ADV_IND) packets, one or more non-connectable advertising indication (ADV_NONCONN_IND) packets, and one or Multiple searchable advertising instructions (ADV_DISCOVER_IND) packets form a group of packets.

In this case, if the aforementioned predetermined receiving mode is a mode that can receive the aforementioned predetermined data item, the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 can perform the process 212 to receive a message from the audio broadcast device 150 or multiple scheduled data items.

For another example, in some embodiments in which the aforementioned predetermined transmission mode is an isochronous broadcast mode or a broadcast isochronous synchronization mode, one or more predetermined data items referred to in the aforementioned processes 208 and 210 may be a or multiple BIS protocol data units. Alternatively, one or more predetermined data items referred to in the aforementioned processes 208 and 210 may also be one or more BIG agreement data units. Alternatively, the one or more predetermined data items referred to in the aforementioned processes 208 and 210 may also be a set of agreement data units formed by one or more BIS agreement data units and one or more BIG agreement data units.

In this case, if the aforementioned predetermined receiving mode is an operation mode that can receive various protocol data units through the BIS logical transmission channel, and/or can receive various protocol data units through the BIG logical transmission channel, then the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 may perform the process 212 to receive one or more predetermined data items from the audio broadcast device 150 .

Next, the first Bluetooth member device 110 will perform the process 214 and the process 216, and the second Bluetooth member device 120 will perform the process 218 and the process 220.

In process 214, the first control circuit 114 may parse one or more predetermined data items received by the first Bluetooth communication circuit 111 to retrieve a predetermined volume indication corresponding to a predetermined volume level. In some embodiments, the first control circuit 114 can also retrieve a Bluetooth address and/or audio of the audio broadcast device 150 from one or more predetermined data items received by the first Bluetooth communication circuit 111 An instruction message indicating that the broadcasting device 150 is about to start audio broadcasting.

In process 216, the first control circuit 114 may control the first audio processing circuit 112 to preset a volume level of the first audio playback circuit 113 according to the predetermined volume instruction. During operation, the first control circuit 114 can control the first audio processing according to the predetermined volume indication. The circuit 112 pre-sets the gain value of the first audio playback circuit 113 to set the volume of the first audio playback circuit 113 .

In process 218, the second control circuit 124 may parse one or more predetermined data items received by the second Bluetooth communication circuit 121 to retrieve a predetermined volume indication corresponding to a predetermined volume level. In some embodiments, the second control circuit 124 can also retrieve a Bluetooth address and/or audio of the audio broadcast device 150 from one or more predetermined data items received by the second Bluetooth communication circuit 121 An instruction message indicating that the broadcasting device 150 is about to start audio broadcasting.

In the process 220, the second control circuit 124 can control the second audio processing circuit 122 to preset a volume level of the second audio playback circuit 123 according to the predetermined volume instruction. During operation, the second control circuit 124 can control the second audio processing circuit 122 to preset the gain value of the second audio playback circuit 123 according to the predetermined volume instruction to set the volume of the second audio playback circuit 123 .

The predetermined volume indication received by the first Bluetooth member device 110 and the second Bluetooth member device 120 will correspond to a predetermined volume set by the audio broadcast device 150 . As mentioned before, the aforementioned predetermined volume level is a volume that is comfortable for most people and does not feel too loud, for example, about 45 to 60 decibels.

In the aforementioned process 216, the first control circuit 114 can control the first audio processing circuit 112 to set the gain value of the first audio playback circuit 113 according to the predetermined volume instruction, so as to pre-adjust the volume of the first audio playback circuit 113. to be close to or equal to the aforementioned predetermined volume.

Similarly, in the aforementioned process 220, the second control circuit 124 can control the second audio processing circuit 122 to set the gain value of the second audio playback circuit 123 according to the predetermined volume indication, so as to adjust the volume of the second audio playback circuit 123. , pre-adjusted to be close to or equal to the aforementioned predetermined volume.

In other words, in this embodiment, before playing the audio data from the audio broadcasting device 150, the first Bluetooth member device 110 and the second Bluetooth member device 120 will first The predetermined volume instructions from the audio broadcast device 150 respectively adjust the volume of the first audio playback circuit 113 and the second audio playback circuit 123 to be close to or equal to the aforementioned predetermined volume.

In process 222, the audio broadcast device 150 may generate one or more Bluetooth LE audio packets including a predetermined audio data. During operation, the audio broadcasting device 150 may use a Low Complexity Communication Codec (LC3) to encode predetermined audio data, and insert the encoded data into one or more Bluetooth low energy audio packets. . In practice, the audio broadcasting device 150 may also use other suitable encoding methods to encode the predetermined audio data.

In process 224, the audio broadcast device 150 may broadcast one or more Bluetooth low energy audio packets including the aforementioned predetermined audio data through one or more BIS logical transmission channels. During operation, the audio broadcast device 150 may operate according to the standard of BLE audio technology to broadcast low-power Bluetooth audio packets including predetermined audio data to other Bluetooth member devices.

In process 226, the first Bluetooth communication circuit 111 of the first Bluetooth member device 110 receives one or more low-power Bluetooth audio packets sent by the audio broadcast device 150 through the aforementioned one or more BIS logical transmission channels, and The second Bluetooth communication circuit 121 of the second Bluetooth member device 120 will also receive one or more low-power Bluetooth audio packets sent by the audio broadcast device 150 through the aforementioned one or more BIS logical transmission channels.

Next, the first Bluetooth member device 110 will perform the process 228 and the process 230, and the second Bluetooth member device 120 will perform the process 232 and the process 234.

In process 228, the first control circuit 114 may parse one or more Bluetooth low energy audio packets received by the first Bluetooth communication circuit 111 to retrieve predetermined audio data generated by the audio broadcast device 150.

In process 230, the first control circuit 114 may instruct the first audio processing circuit 112 to control the first audio playing circuit 113 to play predetermined audio data.

In process 232, the second control circuit 124 may analyze the data connected to the second Bluetooth communication circuit 121. One or more Bluetooth low energy audio packets are received to retrieve predetermined audio data generated by the audio broadcast device 150 .

In process 234, the second control circuit 124 may instruct the second audio processing circuit 122 to control the second audio playing circuit 123 to play predetermined audio data.

Since the first Bluetooth member device 110 and the second Bluetooth member device 120 both receive low-power Bluetooth audio packets sent by the audio broadcast device 150 through the BIS logical transmission channel, when the first audio playback circuit 113 plays the predetermined audio data, The second audio playing circuit 123 will also play predetermined audio data synchronously. In other words, process 230 and process 234 are performed simultaneously.

The audio broadcasting device 150 may repeat the process 222 and the process 224 to broadcast subsequent scheduled audio data. On the other hand, the first Bluetooth member device 110 can repeat the process 226, the process 228, and the process 230 to receive and play subsequent scheduled audio data, and the second Bluetooth member device 120 can repeat the process 226, the process 232, and the process 230. Process 234 is to receive and play subsequent scheduled audio data.

Similarly, other Bluetooth member devices in the Bluetooth audio broadcasting system 100 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140) can refer to the aforementioned first Bluetooth member device 110 or the second Bluetooth member device. The operation mode of 120 is to receive the low-power Bluetooth audio packet broadcast by the audio broadcasting device 150 and play the predetermined audio data in the low-power Bluetooth audio packet.

As can be seen from the description of FIGS. 1 to 2 , before starting to play the predetermined audio data transmitted from the audio broadcasting device 150 , the first Bluetooth member device 110 and the second Bluetooth member device 120 will first play the predetermined audio data transmitted from the audio broadcasting device 150 . The predetermined volume instruction adjusts the volume of the first audio playback circuit 113 and the second audio playback circuit 123 to be close to or equal to the aforementioned predetermined volume.

Therefore, when the first Bluetooth member device 110 starts to use the first audio playing circuit 113 to play the predetermined audio data from the audio broadcasting device 150, the volume emitted by the first audio playing circuit 113 will be close to or equal to the aforementioned predetermined volume. Likewise, when the second When the Bluetooth member device 120 starts to use the second audio playing circuit 123 to play the predetermined audio data from the audio broadcasting device 150, the volume emitted by the second audio playing circuit 123 will be close to or equal to the aforementioned predetermined volume.

In this way, the volume emitted when the first audio playback circuit 113 and the second audio playback circuit 123 start to play the predetermined audio data synchronously can make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, since the volume when the first audio playing circuit 113 and the second audio playing circuit 123 start to play the predetermined audio data synchronously has been preset to be close to or equal to the aforementioned predetermined volume, even if the audio broadcasting device 150 is in use It can also prevent users from being frightened by sudden audio broadcasts when the volume of the audio broadcast is too loud.

In the aforementioned embodiments, the Bluetooth audio broadcasting system 100 uses BLE audio technology for audio broadcasting, and the audio broadcasting device 150 can use a low-complexity communication codec (LC3) to encode predetermined audio data. Therefore, compared with the traditional audio broadcasting method, the aforementioned audio broadcasting method adopted by the Bluetooth audio broadcasting system 100 can not only reduce the power consumption of the first Bluetooth member device 110 and the second Bluetooth member device 120, but also extend the time of the first Bluetooth member device 110 and the second Bluetooth member device 120. The usage time of the first Bluetooth member device 110 and the second Bluetooth member device 120 can also effectively improve the overall audio quality of the audio broadcast.

Similarly, other Bluetooth member devices in the Bluetooth audio broadcasting system 100 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140), before starting to play the predetermined audio data transmitted from the audio broadcasting device 150, According to the predetermined volume instruction from the audio broadcasting device 150, the volume of the relevant audio playback circuit (not shown in the figure) is adjusted to be close to or equal to the aforementioned predetermined volume.

In this way, the volume emitted by other Bluetooth member devices in the Bluetooth audio broadcast system 100 when they start to play predetermined audio data synchronously can make the user feel comfortable without causing discomfort or displeasure to the user.

As mentioned above, when the user listens to the aforementioned multi-member Bluetooth device (for example, the first Bluetooth When the audio played by the member device 110, the second Bluetooth member device 120, the third Bluetooth member device 130, and/or the fourth Bluetooth member device 140) is broadcast, the user's attention to the external sounds will inevitably be reduced, or even Sometimes I don't notice the outside sounds at all. At this time, if an emergency event suddenly occurs outside (for example, air raid sirens, tsunami sirens, fire alarms, emergency broadcasts, voice broadcasts, etc.), the user may be in danger because he does not hear the sirens from the outside world. Situation or delayed response timing.

In order to avoid the aforementioned problems, the audio broadcasting device 150 in the embodiment of FIG. 1 also includes a detection circuit 152 configured to detect warning signals from the outside (for example, earthquake warning messages, tsunami warning messages), or specific Environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or resident voice broadcasts, etc.).

During the process of the aforementioned multi-member Bluetooth device playing the audio broadcast from the audio broadcast device 150, the detection circuit 152 will detect whether the audio broadcast device 150 receives a predetermined alarm signal (for example, the official or other unit through the telecommunications system or Earthquake warning messages, tsunami warning messages, etc. sent by various wireless transmission mechanisms, or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or mileage voice broadcasts, etc.). In practice, the detection circuit 152 may utilize a processing circuit (not shown) of the audio broadcast device 150 and/or various suitable sound receiving and recognition circuits (for example, a combination of a microphone and a sound recognition circuit, not shown). in the figure) to achieve.

For example, the detection circuit 152 can detect whether the audio broadcast device 150 receives warning signals such as earthquake warning messages, tsunami warning messages, etc. transmitted from the official or other units through telecommunication systems or other wireless transmission mechanisms.

For another example, the detection circuit 152 may receive sounds from the external environment and compare the received sounds with one or more predetermined sound models (for example, sound models of air raid sirens, tsunami sirens, or fire alarms), To determine whether specific environmental sounds such as air raid sirens, tsunami sirens, or fire alarms occur in the surrounding environment of the audio broadcast device 150 .

For another example, the detection circuit 152 can receive sounds from the external environment, and analyze and identify the voice content of the received sounds to determine the surrounding environment of the audio broadcast device 150. Whether there are various emergency broadcasts or specific environmental sounds such as local voice broadcasts occurring in the environment.

In this embodiment, the audio broadcasting device 150 can generate a corresponding target control command when the detection circuit 152 detects the aforementioned alarm signal or specific environmental sound, and transmits it to the first Bluetooth member device 110 and the second Bluetooth member device 110 . Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140 to indicate the first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140 Reduce the output volume below a predetermined threshold to prevent the user from missing alarm signals or specific environmental sounds from the outside world. In this way, users can avoid being in dangerous situations without knowing it, or missing important information from the outside world and delaying the response time.

For example, as shown in FIG. 3 , the audio broadcasting device 150 may perform the process 302 in FIG. 3 when the detection circuit 152 detects the aforementioned alarm signal or specific environmental sound.

In process 302, the audio broadcasting device 150 may generate a target control command for instructing the multi-member Bluetooth device to reduce the output volume below a predetermined threshold (for example, 20 dB, 15 dB, 10 dB, 5 dB, etc.) , and insert the target control instruction into one or more target data items. In some embodiments, the aforementioned target control command may be a mute command, a pause command, or a stop command. In another embodiment, the aforementioned target control instruction may be used to instruct the multi-member Bluetooth device to significantly reduce the volume by a predetermined proportion (for example, reduce the volume by 50%, reduce the volume by 70%, reduce the volume by 90%, etc.) or significantly reduce the volume. An instruction to decrease a predetermined number of decibels (for example, decrease by 20 decibels, decrease by 30 decibels, decrease by 40 decibels, etc.). During operation, the audio broadcasting device 150 may insert the target control instructions into one or more specific fields of a single target data item, or may insert the target control instructions into specific fields of multiple target data items.

For example, in some embodiments in which the aforementioned target data items are various Bluetooth advertising packets, the audio broadcast device 150 may insert the aforementioned subject control instructions into single or multiple specific fields of a single Bluetooth advertising packet, or Scattered insertion of multiple Bluetooth advertising packets in a specific field.

For another example, in some embodiments in which the aforementioned target data items are various BIS protocol data units or BIG protocol data units, the audio broadcast device 150 can insert the aforementioned subject control instructions into a single BIS protocol data unit or BIG protocol data unit. Single or multiple specific fields of the unit, or dispersedly inserted into specific fields of multiple BIS protocol data units or BIG protocol data units. In practice, the aforementioned specific fields may be the event counter (Event Counter) field, sub-event counter (Sub-Event Counter) field, or payload counter (Payload Counter) in the BIS protocol data unit or BIG protocol data unit. Column etc.

In process 304, the audio broadcasting device 150 may transmit the aforementioned one or more target data items in a target transmission mode, so that the first Bluetooth member device 110 within the Bluetooth signal transmission range of the audio broadcasting device 150 The second Bluetooth member device 120 and other Bluetooth devices (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140) can receive the aforementioned one or more target data items.

For example, in some embodiments in which the aforementioned target transmission mode is a scannable mode, a connectable mode, a non-connectable mode, or a non-scannable mode, one or more target data referred to in the aforementioned processes 302 and 304 The item can be one or more auxiliary advertising indication (AUX_ADV_IND) packets. Alternatively, the one or more target data items referred to in the aforementioned processes 302 and 304 may also be formed by one or more advertising extension instruction (ADV_EXT_IND) packets and one or more auxiliary advertising instruction (AUX_ADV_IND) packets. A set of packets.

In this case, if the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 operate in the low-power extended passive scanning mode, the low-power extended active scanning mode, or the low-power extended initiator mode, then the A Bluetooth communication circuit 111 and a second Bluetooth communication circuit 121 may perform process 306 to receive one or more target data items from the audio broadcast device 150 .

For another example, the aforementioned target transmission mode is a non-connectable mode or a non-scannable mode. In some embodiments, one or more target data items referred to in the aforementioned process 302 and process 304 may be one or more auxiliary link indication (AUX_CHAIN_IND) packets. Alternatively, the one or more target data items referred to in the aforementioned process 302 and process 304 may also be one or more advertising extension indication (ADV_EXT_IND) packets, one or more auxiliary advertising indication (AUX_ADV_IND) packets, and one or A group of packets formed by multiple auxiliary link indication (AUX_CHAIN_IND) packets.

In this case, if the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 operate in the low-power extended passive scanning mode, the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 can perform the process 306 to One or more target data items transmitted from the audio broadcast device 150 are received.

For another example, in some embodiments where the aforementioned target transmission mode is a scannable mode, one or more target data items referred to in the aforementioned processes 302 and 304 may be one or more auxiliary scan responses (AUX_SCAN_RSP). Packet. Alternatively, the one or more target data items referred to in the aforementioned process 302 and process 304 may also be one or more advertising extension indication (ADV_EXT_IND) packets, one or more auxiliary advertising indication (AUX_ADV_IND) packets, and one or A group of packets formed by multiple auxiliary scan response (AUX_SCAN_RSP) packets. Alternatively, one or more target data items referred to in the aforementioned process 302 and process 304 may also be formed by one or more auxiliary scan response (AUX_SCAN_RSP) packets and one or more auxiliary link indication (AUX_CHAIN_IND) packets. A set of packets. Alternatively, the one or more target data items referred to in the aforementioned processes 302 and 304 may also be one or more advertising extension instruction (ADV_EXT_IND) packets, one or more auxiliary advertising instruction (AUX_ADV_IND) packets, one or more A group of packets formed by an auxiliary scan response (AUX_SCAN_RSP) packet and one or more auxiliary link indication (AUX_CHAIN_IND) packets.

In this case, if the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 operate in the low-power extended active scanning mode, then the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 The Bluetooth communication circuit 121 may perform process 306 to receive one or more target data items from the audio broadcast device 150 .

For another example, in some embodiments in which the aforementioned target transmission mode is a non-connectable mode, a non-scannable mode, a periodic advertising mode, a low-power extended advertising mode, or a low-power periodic advertising mode, the aforementioned process 302 and The one or more target data items referred to in process 304 may be one or more auxiliary synchronization indication (AUX_SYNC_IND) packets. Alternatively, the one or more target data items referred to in the aforementioned process 302 and process 304 may also be one or more advertising extension indication (ADV_EXT_IND) packets, one or more auxiliary advertising indication (AUX_ADV_IND) packets, and one or A group of packets formed by multiple AUX_SYNC_IND packets.

In this case, if the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 operate in the periodic scanning mode, the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 can perform the process 306 to receive the audio broadcast. One or more target data items transmitted from device 150.

For another example, in some embodiments in which the aforementioned target transmission mode is the advertising mode specified by the Bluetooth communication protocol of Bluetooth version 4.0, one or more target data items referred to in the aforementioned process 302 and process 304 may be a or multiple advertising indication (ADV_IND) packets, one or more non-connectable advertising indication (ADV_NONCONN_IND) packets, or one or more searchable advertising indication (ADV_DISCOVER_IND) packets. Alternatively, one or more target data items referred to in the aforementioned process 302 and process 304 may also be formed by one or more advertising indication (ADV_IND) packets and one or more non-connectable advertising indication (ADV_NONCONN_IND) packets. A set of packets. Alternatively, the one or more target data items referred to in the aforementioned processes 302 and 304 may also be formed by one or more advertising indication (ADV_IND) packets and one or more searchable advertising indication (ADV_DISCOVER_IND) packets. A set of packets. Alternatively, one or more target data items referred to in the aforementioned process 302 and process 304 may also be one or more advertisement indication (ADV_IND) packets, one or more unconnectable advertisement indications. (ADV_NONCONN_IND) packet, and one or more searchable advertising indication (ADV_DISCOVER_IND) packets to form a group of packets.

In this case, if the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 are operated in a mode that can receive the aforementioned target data item, the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 can perform the process 306, To receive one or more target data items from the audio broadcast device 150 .

For another example, in some embodiments in which the aforementioned target transmission mode is an isochronous broadcast mode or a broadcast isochronous synchronization mode, one or more target data items referred to in the aforementioned processes 302 and 304 may be a or multiple BIS protocol data units. Alternatively, one or more target data items referred to in the aforementioned processes 302 and 304 may also be one or more BIG agreement data units. Alternatively, the one or more target data items referred to in the aforementioned processes 302 and 304 may also be a set of agreement data units formed by one or more BIS agreement data units and one or more BIG agreement data units.

In this case, if the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 are operated to receive various protocol data units through the BIS logical transmission channel, and/or can receive various protocol data units through the BIG logical transmission channel In the operation mode, the first Bluetooth communication circuit 111 and the second Bluetooth communication circuit 121 can perform the process 306 to receive one or more target data items from the audio broadcast device 150 .

Next, the first Bluetooth member device 110 will perform the process 308 and the process 310, and the second Bluetooth member device 120 will perform the process 312 and the process 314.

In process 308, the first control circuit 114 may parse one or more target data items received by the first Bluetooth communication circuit 111 to retrieve a target control instruction.

In process 310, the first control circuit 114 may control the first audio processing circuit 112 to reduce the volume of the first audio playback circuit 113 below a predetermined threshold according to the target control instruction. During operation, the first control circuit 114 can control the first audio processing circuit 112 to significantly reduce the gain value of the first audio playback circuit 113 or reduce the gain value of the first audio playback circuit 113 to a predetermined value according to the target control instruction. level below to play the first audio The volume level of circuit 113 drops below a predetermined threshold value. Alternatively, the first control circuit 114 can control the first audio processing circuit 112 to switch the first audio playback circuit 113 to a silent mode, pause the playback operation of the first audio playback circuit 113, or stop the first audio playback according to the target control instruction. Playback operation of circuit 113.

In process 312, the second control circuit 124 may parse one or more target data items received by the second Bluetooth communication circuit 121 to retrieve a target control command.

In process 314, the second control circuit 124 may control the second audio processing circuit 122 to reduce the volume of the second audio playback circuit 123 below a predetermined threshold according to the target control instruction. During operation, the second control circuit 124 can control the second audio processing circuit 122 to significantly reduce the gain value of the second audio playback circuit 123 or reduce the gain value of the first audio playback circuit 113 to a predetermined value according to the target control instruction. below the level, so as to reduce the volume of the second audio playing circuit 123 below the predetermined threshold value. Alternatively, the second control circuit 124 can control the second audio processing circuit 122 to switch the second audio playback circuit 123 to a silent mode, pause the playback operation of the second audio playback circuit 123, or stop the second audio playback according to the target control instruction. Playback operation of circuit 123.

Since the first Bluetooth member device 110 and the second Bluetooth member device 120 both adjust the volume according to the target control command in the target data item issued by the audio broadcasting device 150, when the first audio processing circuit 112 plays the first audio When the volume of the circuit 113 drops below the predetermined threshold, the second audio processing circuit 122 will also simultaneously reduce the volume of the second audio playing circuit 123 to below the predetermined threshold. In other words, process 310 and process 314 will be performed simultaneously.

Similarly, other Bluetooth member devices in the Bluetooth audio broadcasting system 100 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140) can refer to the aforementioned first Bluetooth member device 110 or the second Bluetooth member device. The operation mode of 120 is to receive the low-power Bluetooth audio packet broadcast by the audio broadcast device 150, play the predetermined audio data in the low-power Bluetooth audio packet, and according to the target control command in the target data item sent by the audio broadcast device 150 to synchronize the volume down to a predetermined threshold value below.

In other words, during the process of the first Bluetooth member device 110 and the second Bluetooth member device 120 playing the audio data broadcast by the audio broadcast device 150, the audio broadcast device 150 can detect the aforementioned alarm signal or specific signal in the detection circuit 152. When there is ambient sound, a target control command is broadcast to the first Bluetooth member device 110 and the second Bluetooth member device 120 to synchronously reduce the volume of the first Bluetooth member device 110 and the second Bluetooth member device 120 below a predetermined threshold.

Similarly, during the process of the third Bluetooth member device 130 and the fourth Bluetooth member device 140 playing the audio data broadcast by the audio broadcast device 150, the audio broadcast device 150 can detect the aforementioned alarm signal or the above in the detection circuit 152. When there is a specific environmental sound, a target control command is broadcast to the third Bluetooth member device 130 and the fourth Bluetooth member device 140 to synchronously reduce the volume of the third Bluetooth member device 130 and the fourth Bluetooth member device 140 below a predetermined threshold value. .

In the aforementioned embodiment in which the first Bluetooth member device 110 and the second Bluetooth member device 120 are a pair of noise-canceling headphones, the audio broadcast device 150 uses the target control command to instruct the first Bluetooth member device 110 and the second Bluetooth member After the device 120 reduces the volume below a predetermined threshold value, it may also send a mode-switching command to the first Bluetooth member device 110 and the second Bluetooth member device 120 to instruct the first Bluetooth member device 110 and the second Bluetooth member device 120 . The two Bluetooth member devices 120 switch from a noise cancellation mode to a transparency mode to further increase the user's ability to receive external sounds.

Similarly, in the aforementioned embodiment in which the third Bluetooth member device 130 and the fourth Bluetooth member device 140 are a pair of noise-canceling headphones, the audio broadcast device 150 uses the target control command to instruct the third Bluetooth member device 130 and the third Bluetooth member device 130 . After the fourth Bluetooth member device 140 reduces the volume below the predetermined threshold value, it may also send a mode switching command to the third Bluetooth member device 130 and the fourth Bluetooth member device 140 to instruct the third Bluetooth member device 130 and the fourth Bluetooth member device 140 . Device 140 switches from a noise reduction mode to a transparency mode to further Increase its user's ability to receive external sounds.

It can be known from the above description of FIGS. 1 to 3 that before the multi-member Bluetooth device in the Bluetooth audio broadcast system 100 starts to play the predetermined audio data transmitted from the audio broadcast device 150, the first Bluetooth member device 110 and the second Bluetooth member device 120 According to the predetermined volume instruction from the audio broadcasting device 150, the volume of the first audio playback circuit 113 and the second audio playback circuit 123 is adjusted to be close to or equal to the aforementioned predetermined volume.

Therefore, when the first Bluetooth member device 110 starts to use the first audio playing circuit 113 to play the predetermined audio data from the audio broadcasting device 150, the volume emitted by the first audio playing circuit 113 will be close to or equal to the aforementioned predetermined volume. Similarly, when the second Bluetooth member device 120 starts to use the second audio playback circuit 123 to play the predetermined audio data from the audio broadcast device 150, the volume emitted by the second audio playback circuit 123 will also be close to or equal to the aforementioned predetermined volume. size.

In this way, the volume emitted when the first audio playback circuit 113 and the second audio playback circuit 123 start to play the predetermined audio data synchronously can make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, since the volume when the first audio playing circuit 113 and the second audio playing circuit 123 start to play the predetermined audio data synchronously has been preset to be close to or equal to the aforementioned predetermined volume, even if the audio broadcasting device 150 is in use It can also prevent users from being frightened by sudden audio broadcasts when the volume of the audio broadcast is too loud.

Similarly, other Bluetooth member devices in the Bluetooth audio broadcasting system 100 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140), before starting to play the predetermined audio data transmitted from the audio broadcasting device 150, According to the predetermined volume instruction from the audio broadcasting device 150, the volume of the relevant audio playback circuit (not shown in the figure) is adjusted to be close to or equal to the aforementioned predetermined volume. Therefore, other Bluetooth member devices in the Bluetooth audio broadcast system 100 start to play the preset synchronously. The volume emitted when setting the audio data can also make the user feel comfortable without causing the user to feel uncomfortable or unhappy.

In addition, during the process of the multi-member Bluetooth devices in the Bluetooth audio broadcast system 100 playing the audio data broadcast by the audio broadcast device 150, the audio broadcast device 150 can detect the aforementioned alarm signal or specific environmental sound in the detection circuit 152. At this time, a target control command is broadcast to individual Bluetooth member devices to synchronously reduce the volume of individual Bluetooth member devices below a predetermined threshold. In other words, the aforementioned Bluetooth audio broadcasting system 100 can generate specific environmental sounds (for example, when the audio broadcasting device 150 receives an alarm signal (eg, earthquake warning message, tsunami warning message, etc.)) or the surrounding environment of the audio broadcasting device 150. (air raid alarm, tsunami alarm, fire alarm, various emergency broadcasts, or local voice broadcasts, etc.), the volume of different Bluetooth member devices in the Bluetooth audio broadcast system 100 is synchronously reduced below a predetermined critical value to prevent users from Missing warning signals or specific sounds from the outside world may lead to dangerous situations, or delays in responding.

Furthermore, the Bluetooth audio broadcasting system 100 uses BLE audio technology for audio broadcasting, and the audio broadcasting device 150 can use a low-complexity communication codec (LC3) to encode predetermined audio data. Therefore, compared with the traditional audio broadcasting method, the aforementioned audio broadcasting method adopted by the Bluetooth audio broadcasting system 100 can not only reduce the power consumption of the multi-member Bluetooth device, thereby extending the usage time of the multi-member Bluetooth device, but also Effectively improve the overall audio quality of audio broadcasts.

Please refer to FIG. 4 , which shows a simplified functional block diagram of a Bluetooth audio broadcast system 400 according to a second embodiment of the present invention. Similar to the Bluetooth audio broadcast system 100 in Figure 1, the Bluetooth audio broadcast system 400 in Figure 4 also includes an audio broadcast device 150 and a plurality of Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110, the second Bluetooth member device device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140). In addition, the Bluetooth audio broadcast system 400 also includes an audio source device 470 .

The audio source device 470 is configured to receive sounds emitted by the user to generate corresponding sounds. The audio signal AS can be transmitted to the audio broadcasting device 150 using various wired or wireless transmission methods. In the embodiment of FIG. 4 , the audio broadcasting device 150 is further configured to convert the audio signal AS transmitted from the audio source device 470 into predetermined audio data to be broadcast. In other words, in the embodiment of FIG. 4 , the content of the predetermined audio data broadcast by the audio broadcast device 150 originates from the audio source device 470 .

During operation, the audio broadcast device 150 may use the BLE audio technology specified in Bluetooth core specification version 5.2 or a later version to broadcast predetermined audio data. Similar to the embodiment of FIG. 1 , the audio broadcasting device 150 can transmit low-power Bluetooth audio packets containing predetermined audio data to multiple Bluetooth member devices in the Bluetooth audio broadcasting system 400 (for example, FIG. 4 The first Bluetooth member device 110, the second Bluetooth member device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140 shown in ) perform the broadcast.

Each Bluetooth member device in the Bluetooth audio broadcast system 400 can receive and play the predetermined audio data broadcast by the audio broadcast device 150 according to the operation mode of the corresponding device in the embodiment of FIG. 1 .

In the embodiment of FIG. 4 , the audio source device 470 further includes a detection circuit 472 configured to detect alarm signals from the outside (for example, earthquake warning messages, tsunami warning messages), or specific environmental sounds (for example, , air raid alarm, fire alarm, emergency broadcast, or resident voice broadcast, etc.).

During the process of the aforementioned multi-member Bluetooth device playing the audio broadcast from the audio broadcast device 150, the detection circuit 472 will detect whether the audio source device 470 receives a predetermined alarm signal (for example, the official or other unit through the telecommunications system or Earthquake warning messages, tsunami warning messages, etc. sent by various wireless transmission mechanisms, or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or mileage voice broadcasts, etc.). In practice, the detection circuit 472 may utilize a processing circuit (not shown) of the audio source device 470 and/or various suitable sound receiving and recognition circuits (for example, a combination of a microphone and a sound recognition circuit, not shown). in the figure) to achieve.

For example, the detection circuit 472 can detect whether the audio source device 470 receives warning signals such as earthquake warning messages and tsunami warning messages from the official or other units through telecommunications systems or other wireless transmission mechanisms.

For another example, the detection circuit 472 may receive sounds from the external environment and compare the received sounds with one or more predetermined sound models (for example, sound models of air raid sirens, tsunami sirens, or fire alarms), To determine whether specific environmental sounds such as air raid sirens, tsunami sirens, or fire alarms occur in the surrounding environment of the audio source device 470 .

For another example, the detection circuit 472 can receive sounds from the external environment, and analyze and identify the voice content of the received sounds to determine whether various emergency broadcasts or long voice broadcasts are occurring in the surrounding environment of the audio source device 470 . Specific ambient sounds.

In this embodiment, the audio source device 470 can generate a corresponding detection signal DS when the detection circuit 472 detects the aforementioned alarm signal or specific environmental sound, and transmit the detection signal DS to the audio broadcasting device 150 . The audio broadcasting device 150 can generate a corresponding target control command when receiving the detection signal DS from the audio source device 470, and transmit it to the first Bluetooth member device 110, the second Bluetooth member device 120, and the third Bluetooth member. device 130, and the fourth Bluetooth member device 140 to instruct the first Bluetooth member device 110, the second Bluetooth member device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140 to reduce the volume below a predetermined threshold. , to prevent users from missing alarm signals or specific environmental sounds from the outside world. In this way, users can avoid being in dangerous situations without knowing it, or missing important information from the outside world and delaying the response time.

In practice, the aforementioned audio source device 470 may be any suitable device that can receive sounds and convert them into corresponding audio signals AS, generate detection signals DS according to the detection results of the detection circuit 472, and support suitable signal transmission methods. The circuit is implemented by, for example, a laptop computer, a tablet computer, a mobile communication device (eg, a mobile phone), a wearable device, a video conferencing system, or various types of wireless microphones.

In the embodiment of FIG. 4 , the audio broadcast device 150 may receive the audio source device 470 When the detection signal DS is generated, processes 302 and 304 in FIG. 3 are performed to transmit target control instructions to multiple Bluetooth member devices in the Bluetooth audio broadcast system 400 (for example, the aforementioned first Bluetooth member device 110, the The second Bluetooth member device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140).

The aforementioned descriptions of the implementation and connection methods of other circuits and devices in FIG. 1 are also applicable to the Bluetooth audio broadcast system 400 of FIG. 4 . The aforementioned descriptions of the generation and transmission methods of the predetermined data items and target data items in FIGS. 2 and 3 are also applicable to the Bluetooth audio broadcast system 400 of FIG. 4 . For the sake of brevity, the description will not be repeated here.

As can be seen from the description of FIG. 4 , before the multi-member Bluetooth device in the Bluetooth audio broadcast system 400 starts playing the predetermined audio data from the audio broadcast device 150 , the first Bluetooth member device 110 and the second Bluetooth member device 120 will first According to the predetermined volume instruction from the audio broadcast device 150, the volume of the first audio playback circuit 113 and the second audio playback circuit 123 is adjusted to be close to or equal to the aforementioned predetermined volume.

Therefore, when the first Bluetooth member device 110 starts to use the first audio playing circuit 113 to play the predetermined audio data from the audio broadcasting device 150, the volume emitted by the first audio playing circuit 113 will be close to or equal to the aforementioned predetermined volume. Similarly, when the second Bluetooth member device 120 starts to use the second audio playback circuit 123 to play the predetermined audio data from the audio broadcast device 150, the volume emitted by the second audio playback circuit 123 will also be close to or equal to the aforementioned predetermined volume. size.

In this way, the volume emitted when the first audio playback circuit 113 and the second audio playback circuit 123 start to play the predetermined audio data synchronously can make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, since the volume when the first audio playing circuit 113 and the second audio playing circuit 123 start to play the predetermined audio data synchronously has been preset to be close to or equal to the aforementioned predetermined volume, even if the audio broadcasting device 150 is in use It can also prevent users from being frightened by sudden audio broadcasts when the volume of the audio broadcast is too loud.

Similarly, other Bluetooth member devices in the Bluetooth audio broadcasting system 400 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140), before starting to play the predetermined audio data transmitted from the audio broadcasting device 150, According to the predetermined volume instruction from the audio broadcasting device 150, the volume of the relevant audio playback circuit (not shown in the figure) is adjusted to be close to or equal to the aforementioned predetermined volume. Therefore, the volume emitted by other Bluetooth member devices in the Bluetooth audio broadcast system 400 when they start to play predetermined audio data synchronously can also make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, during the process of the multi-member Bluetooth devices in the Bluetooth audio broadcast system 400 playing the audio data broadcast by the audio broadcast device 150, the audio source device 470 can also detect the aforementioned alarm signal or specific environment in the detection circuit 472. When the sound is heard, the detection signal DS is used to instruct the audio broadcasting device 150 to broadcast a target control command to individual Bluetooth member devices to synchronously reduce the volume of individual Bluetooth member devices below a predetermined threshold. In other words, the aforementioned Bluetooth audio broadcast system 400 can generate specific environmental sounds (for example, when the audio source device 470 receives an alarm signal (for example, earthquake warning message, tsunami warning message, etc.) or the surrounding environment of the audio source device 470 ). (air raid alarm, tsunami alarm, fire alarm, various emergency broadcasts, or local voice broadcasts, etc.), the volume of different Bluetooth member devices in the Bluetooth audio broadcast system 400 is synchronously reduced below a predetermined critical value to prevent users from Missing warning signals or specific sounds from the outside world may lead to dangerous situations, or delays in responding.

Furthermore, the Bluetooth audio broadcasting system 400 uses BLE audio technology for audio broadcasting, and the audio broadcasting device 150 can use a low-complexity communication codec (LC3) to encode predetermined audio data. Therefore, compared with the traditional audio broadcasting method, the aforementioned audio broadcasting method adopted by the Bluetooth audio broadcasting system 400 can not only reduce the power consumption of the multi-member Bluetooth device, thereby extending the usage time of the multi-member Bluetooth device, but also Effectively improve the overall audio quality of audio broadcasts.

Please refer to Figure 5, which illustrates a Bluetooth audio broadcast system according to a third embodiment of the present invention. 500 simplified functional block diagram. Similar to the Bluetooth audio broadcast system 100 in Figure 1, the Bluetooth audio broadcast system 500 in Figure 5 also includes an audio broadcast device 150 and a plurality of Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110, the second Bluetooth member device device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140), and an audio source device 570. In addition, the Bluetooth audio broadcast system 500 in Figure 5 also includes a main control device 560.

In the Bluetooth audio broadcasting system 500, the main control device 560 is configured to detect alarm signals or specific environmental sounds from the outside world, so as to generate and transmit a detection signal DS to the audio broadcasting device 150.

As shown in FIG. 5 , the main control device 560 includes a communication circuit 561 , a detection circuit 563 , and a processing circuit 565 . The communication circuit 561 is configured to communicate various data and instructions with the audio broadcast device 150 and the audio source device 570 using various wired or wireless transmission methods. The detection circuit 563 is configured to detect warning signals from the outside (for example, earthquake warning messages, tsunami warning messages), or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or mileage voice broadcasts). wait). The processing circuit 565 is coupled to the communication circuit 561 and the detection circuit 563, and is configured to control the audio source device 570 through the communication circuit 561, or to receive instructions from the audio source device 570. The processing circuit 565 is also configured to generate a detection signal DS when the detection circuit 563 detects the aforementioned alarm signal or specific environmental sound, and can use the communication circuit 561 to transmit the detection signal DS to the audio broadcast device 150 .

In practice, the communication circuit 561 can be implemented by various wired transmission circuits, wireless transmission circuits, or hybrid circuits that integrate the aforementioned two communication mechanisms. The detection circuit 563 can be implemented using various suitable sound receiving and identifying circuits (for example, a combination of a microphone and a sound identifying circuit). The processing circuit 565 may utilize a single processor module, a combination of multiple processor modules, a single computer system, a combination of multiple computer systems, a single server, or multiple servers with appropriate computing power and instruction processing capabilities. combination to achieve.

In practical applications, the different functional blocks in the main control device 560 can be implemented using different circuits, or can be integrated into a mobile communication device (for example, a mobile phone), a wearable device, a tablet computer, or a notebook. A computer, a desktop computer, a vehicle communication system, a satellite communication device, a smart speaker, or a video conferencing system.

Similar to the embodiment of FIG. 4 , the audio source device 570 in FIG. 5 can also receive the sound emitted by the user to generate the corresponding audio signal AS, and can transmit the audio signal AS to the audio broadcasting device using various wired or wireless transmission methods. 150. The audio broadcast device 150 in FIG. 5 can also convert the audio signal AS transmitted from the audio source device 570 into predetermined audio data to be broadcast. In other words, the content of the predetermined audio data broadcast by the audio broadcast device 150 in FIG. 5 also originates from the audio source device 570 .

However, the difference from the Bluetooth audio broadcasting system 400 in FIG. 4 is that in the embodiment of FIG. 5 , the detection signal DS is generated by the main control device 560 and transmitted to the audio broadcasting device 150 instead of Generated by source device 570.

During operation, the Bluetooth audio broadcasting system 500 in the embodiment of FIG. 5 can also perform audio broadcasting in the manner described in FIG. 2 . In addition, during the audio broadcasting process of the audio broadcasting device 150 (that is, during the process of the audio broadcasting device 150 repeating the process 222 and the process 224 of FIG. 2 ), the detection circuit 563 will detect whether the main control device 560 receives to predetermined warning signals (for example, earthquake warning messages, tsunami warning messages, etc. sent by the official or other units through telecommunications systems or various wireless transmission mechanisms), or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, Or long voice broadcast, etc.).

For example, the detection circuit 563 can detect whether the main control device 560 receives warning signals such as earthquake warning messages and tsunami warning messages from the official or other units through telecommunications systems or other wireless transmission mechanisms.

For another example, the detection circuit 563 can receive sounds from the external environment and compare the received sounds with one or more predetermined sound models (for example, sound models of air raid sirens, tsunami sirens, or fire alarms). To determine whether the surrounding environment of the main control device 560 is Whether specific environmental sounds such as air raid sirens, tsunami sirens, or fire alarms occur.

For another example, the detection circuit 563 can receive sounds from the external environment, and perform voice content analysis and identification on the received sound content to determine whether various emergency broadcasts or mileage voice broadcasts are occurring in the surrounding environment of the main control device 560 . Specific ambient sounds.

In this embodiment, the processing circuit 565 of the main control device 560 can generate a corresponding detection signal DS when the detection circuit 563 detects the aforementioned alarm signal or specific environmental sound, and use the communication circuit 561 to transmit the detection signal DS. The test signal DS is sent to the audio broadcasting device 150. The audio broadcasting device 150 can generate a corresponding target control command when receiving the detection signal DS from the main control device 560, and transmit it to the first Bluetooth member device 110, the second Bluetooth member device 120, and the third Bluetooth member. device 130, and the fourth Bluetooth member device 140 to instruct the first Bluetooth member device 110, the second Bluetooth member device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140 to reduce the volume below a predetermined threshold. , to prevent users from missing alarm signals or specific environmental sounds from the outside world. In this way, users can avoid being in dangerous situations without knowing it, or missing important information from the outside world and delaying the response time.

In the embodiment of FIG. 5 , the audio broadcasting device 150 can perform the process 302 and the process 304 in FIG. 3 when receiving the detection signal DS generated by the main control device 560 to transmit the target control command to the Bluetooth audio broadcasting system 500 A plurality of Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140).

The foregoing description of the implementation and connection methods of the relevant circuits and devices in FIG. 1 or FIG. 4 is also applicable to the Bluetooth audio broadcast system 500 of FIG. 5 . The aforementioned descriptions of the generation and transmission methods of the predetermined data items and target data items in FIGS. 2 and 3 are also applicable to the Bluetooth audio broadcast system 500 of FIG. 5 . For the sake of brevity, the description will not be repeated here.

Please refer to FIG. 6 , which shows a simplified functional block diagram of a Bluetooth audio broadcast system 600 according to a fourth embodiment of the present invention. Similar to the Bluetooth audio broadcast system 500 in Figure 5, the Bluetooth audio broadcast system 600 in Figure 6 also includes an audio broadcast device 150, a plurality of Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140), and the main control device 560, but the Bluetooth in FIG. 6 The audio broadcast system 600 omits the aforementioned audio source device 570 .

In the embodiment of FIG. 6 , the predetermined audio data to be broadcast by the audio broadcasting device 150 may be audio data pre-stored in the audio broadcasting device 150 , or may be the sound of the audio broadcasting device 150 based on the surrounding environment (for example, using audio data generated by the speaker's voice).

Similar to the aforementioned embodiment of FIG. 5 , the detection signal DS in the embodiment of FIG. 6 is also generated by the main control device 560 and transmitted to the audio broadcasting device 150 .

In the embodiment of FIG. 6 , the audio broadcasting device 150 can perform the process 302 and the process 304 in FIG. 3 to transmit the target control command to the Bluetooth audio broadcasting system 600 when receiving the detection signal DS generated by the main control device 560 . A plurality of Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140).

The foregoing description of the implementation and connection methods of the relevant circuits and devices in FIG. 1 , FIG. 4 , or FIG. 5 is also applicable to the Bluetooth audio broadcast system 600 of FIG. 6 . The aforementioned descriptions of the generation and transmission methods of the predetermined data items and target data items in FIGS. 2 and 3 are also applicable to the Bluetooth audio broadcast system 600 of FIG. 6 . For the sake of brevity, the description will not be repeated here.

It can be known from the description of FIGS. 5 to 6 that before the multi-member Bluetooth devices in the Bluetooth audio broadcasting systems 500 and 600 start playing the predetermined audio data from the audio broadcasting device 150, the first Bluetooth member device 110 and the second Bluetooth member The device 120 will first adjust the volume of the first audio playback circuit 113 and the second audio playback circuit 123 to be close to or equal to the aforementioned predetermined volume according to the predetermined volume instruction from the audio broadcasting device 150 .

Therefore, when the first Bluetooth member device 110 starts to use the first audio playing circuit 113 to play When the predetermined audio data is transmitted from the audio broadcasting device 150, the volume emitted by the first audio playing circuit 113 will be close to or equal to the aforementioned predetermined volume. Similarly, when the second Bluetooth member device 120 starts to use the second audio playback circuit 123 to play the predetermined audio data from the audio broadcast device 150, the volume emitted by the second audio playback circuit 123 will also be close to or equal to the aforementioned predetermined volume. size.

In this way, the volume emitted when the first audio playback circuit 113 and the second audio playback circuit 123 start to play the predetermined audio data synchronously can make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, since the volume when the first audio playing circuit 113 and the second audio playing circuit 123 start to play the predetermined audio data synchronously has been preset to be close to or equal to the aforementioned predetermined volume, even if the audio broadcasting device 150 is in use It can also prevent users from being frightened by sudden audio broadcasts when the volume of the audio broadcast is too loud.

Similarly, other Bluetooth member devices in the Bluetooth audio broadcasting systems 500 and 600 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140), before starting to play the predetermined audio data transmitted from the audio broadcasting device 150 , according to the predetermined volume instruction from the audio broadcast device 150, the volume of the relevant audio playback circuit (not shown in the figure) is adjusted to be close to or equal to the aforementioned predetermined volume. Therefore, the volume emitted by other Bluetooth member devices in the Bluetooth audio broadcast system 500 and 600 when they start to play predetermined audio data synchronously can also make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, during the process of the multi-member Bluetooth devices in the Bluetooth audio broadcasting systems 500 and 600 playing the audio data broadcast by the audio broadcasting device 150, the main control device 560 can also detect the aforementioned alarm signal or the above in the detection circuit 563. When there is a specific environmental sound, the detection signal DS is used to instruct the audio broadcast device 150 to broadcast a target control command to individual Bluetooth member devices to synchronously reduce the volume of individual Bluetooth member devices below a predetermined threshold. In other words, the aforementioned Bluetooth audio broadcast systems 500 and 600 can receive the When an alarm signal (for example, an earthquake warning message, a tsunami warning message, etc.) is received, or a specific environmental sound occurs in the surrounding environment of the main control device 560 (for example, an air raid siren, a tsunami siren, a fire alarm, various emergency broadcasts, or inside (long voice broadcast, etc.), the volume of different Bluetooth member devices in the Bluetooth audio broadcast system 500, 600 is synchronously reduced below a predetermined threshold value to prevent the user from missing alarm signals or specific sounds coming from the outside and getting injured. into a dangerous situation, or delay the response time.

Furthermore, the Bluetooth audio broadcasting systems 500 and 600 use BLE audio technology for audio broadcasting, and the audio broadcasting device 150 can use a low-complexity communication codec (LC3) to encode predetermined audio data. Therefore, compared with the traditional audio broadcasting method, the aforementioned audio broadcasting method adopted by the Bluetooth audio broadcasting systems 500 and 600 can not only reduce the power consumption of the multi-member Bluetooth device, but also extend the usage time of the multi-member Bluetooth device. It can also effectively improve the overall audio quality of audio broadcasts.

Please refer to FIG. 7 , which shows a simplified functional block diagram of a Bluetooth audio broadcast system 700 according to a fifth embodiment of the present invention. Similar to the Bluetooth audio broadcast system 600 in Figure 6, the Bluetooth audio broadcast system 700 in Figure 7 also includes an audio broadcast device 150 and a plurality of Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110, the second Bluetooth member device device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140), and the master device 560.

Different from the aforementioned embodiment of FIG. 6 , some or all of the Bluetooth member devices in the Bluetooth audio broadcast system 700 also include a detection circuit and a wireless communication circuit. For example, in the embodiment of FIG. 7 , in addition to the aforementioned first Bluetooth communication circuit 111 , first audio processing circuit 112 , first audio playback circuit 113 , and first control circuit 114 , the first Bluetooth member device 110 also It includes a first wireless communication circuit 715 and a first detection circuit 716. Similarly, in addition to the aforementioned second Bluetooth communication circuit 121, second audio processing circuit 122, second audio playback circuit 123, and second control circuit 124, the second Bluetooth member device 120 also includes a second wireless communication circuit. 725 and a second detection circuit 726.

In the first Bluetooth member device 110, the first wireless communication circuit 715 is coupled to the first control circuit 114, and is configured to utilize various wireless access methods other than Bluetooth communication methods under the control of the first control circuit 114. Technology (Radio Access Technology, RAT), communicates various data and/or instructions with the main control device 560. The first detection circuit 716 is coupled to the first control circuit 114 and is configured to detect warning signals from the outside (for example, earthquake warning messages, tsunami warning messages), or specific environmental sounds (for example, air raid sirens, Fire alarm, emergency broadcast, or resident voice broadcast, etc.). The first control circuit 114 can generate a detection signal DS when the first detection circuit 716 detects the aforementioned alarm signal or specific environmental sound, and uses the first wireless communication circuit 715 to transmit the detection signal DS to the main control unit. Device 560.

The aforementioned wireless access technologies can be various infrared signal transmission technologies, near field communication (NFC) technologies, second generation (2nd Generation, 2G) mobile communication technologies, various third generation (3rd Generation, 3G) technologies. Mobile communication technologies, various fourth generation (4G) mobile communication technologies, various fifth generation (5th Generation, 5G) mobile communication technologies, various IEEE 802.11 series standard wireless network communication technologies, various Internet of Things (Internet- of-Thing, IoT) communication technology, various Narrow Band Internet of Thing (NB-IoT) communication technology, various Vehicle-to-Vehicle communication technologies, various Vehicle-to-Everything, V2X) communication technology, various satellite communication technologies, or various wireless communication technologies released by other standard-setting organizations.

In the second Bluetooth member device 120, the second wireless communication circuit 725 is coupled to the second control circuit 124, and is configured to utilize the aforementioned various wireless memories other than the Bluetooth communication method under the control of the second control circuit 124. Access technology (RAT) to communicate various data and/or instructions with the main control device 560. The second detection circuit 726 is coupled to the second control circuit 124 and is configured to detect warning signals from the outside (for example, earthquake warning messages, tsunami warning messages), or specific environmental sounds (for example, air raid sirens, Fire alarm, emergency broadcast, or resident voice broadcast, etc.). The second control circuit 124 may When the second detection circuit 726 detects the aforementioned alarm signal or specific environmental sound, it generates a detection signal DS and uses the second wireless communication circuit 725 to transmit the detection signal DS to the main control device 560 .

In practice, the aforementioned first wireless communication circuit 715 and the second wireless communication circuit 725 can be implemented using various suitable circuits or chips that support one or more of the aforementioned wireless access technologies, such as infrared signal transmission circuits, near-field wireless communication circuits, etc. Field communication circuits, network interface cards (NICs), wireless transmission (Wi-Fi) circuits, mobile communication circuits, satellite communication circuits, Internet of Things communication circuits, etc. The first wireless communication circuit 715 may be integrated with other functional blocks in the first Bluetooth member device 110 (eg, the first Bluetooth communication circuit 111 ). Likewise, the second wireless communication circuit 725 may be integrated with other functional blocks in the second Bluetooth member device 120 (eg, the second Bluetooth communication circuit 121 ).

The aforementioned first detection circuit 716 and second detection circuit 726 can be implemented with various suitable sound receiving and identification circuits (for example, a combination of a microphone and a sound identification circuit). The first detection circuit 716 may be disposed outside the first Bluetooth member device 110 , or may be integrated with other functional blocks in the first Bluetooth member device 110 . Similarly, the second detection circuit 726 can be disposed outside the second Bluetooth member device 120 , or can be integrated with other functional blocks in the second Bluetooth member device 120 .

Other Bluetooth member devices in the Bluetooth audio broadcast system 700 can be configured with corresponding detection circuits and wireless communication circuits according to the architecture of the first Bluetooth member device 110 or the second Bluetooth member device 120 described above.

In the embodiment of FIG. 7 , the main control device 560 includes the aforementioned communication circuit 561 , a processing circuit 565 , and an input circuit 763 . The input circuit 763 is coupled to the processing circuit 565 and is configured to allow the user of the main control device 560 to perform various operations on the main control device 560, such as inputting instructions, setting the volume adjustment direction, or setting the volume adjustment amount, etc. In practice, the input circuit 763 can be a keyboard, a mouse, a remote control, a touch screen, a trackpad, a button, a resistive touch circuit, a capacitive touch circuit, a gyroscope, a voice-activated input device, It is implemented by a gesture sensing device, a circuit using various other command generation technologies, or a combination of the aforementioned devices.

In addition, multiple Bluetooth member devices in the Bluetooth audio broadcast system 700 (for example, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140) may Together they form a multi-member Bluetooth device, for example, a set of multi-channel Bluetooth speakers.

During operation, the Bluetooth audio broadcast system 700 can also use the aforementioned method in FIG. 2 to broadcast audio to the aforementioned multi-member Bluetooth devices.

In addition, during the audio broadcasting process of the audio broadcasting device 150 (that is, during the process of the audio broadcasting device 150 repeating the process 222 and the process 224 of FIG. 2 ), the first detection circuit 716 can detect the first Bluetooth member Whether the device 110 receives a predetermined alarm signal (for example, earthquake warning messages, tsunami warning messages, etc. sent by the official or other units through telecommunications systems or various wireless transmission mechanisms), or specific environmental sounds (for example, air raid sirens, fire alarms) , emergency broadcast, or resident voice broadcast, etc.).

For example, the first detection circuit 716 can detect whether the first Bluetooth member device 110 receives warning signals such as earthquake warning messages and tsunami warning messages from the official or other units through telecommunication systems or other wireless transmission mechanisms.

For another example, the first detection circuit 716 may receive sounds from the external environment and compare the received sounds with one or more predetermined sound models (for example, sound models of air raid sirens, tsunami sirens, or fire alarms). Yes, to determine whether specific environmental sounds such as air raid alarms, tsunami alarms, or fire alarms occur in the surrounding environment of the first Bluetooth member device 110 .

For another example, the first detection circuit 716 can receive sounds from the external environment, and analyze and identify the voice content of the received sounds to determine whether various emergency broadcasts or intruders are occurring in the surrounding environment of the first Bluetooth member device 110 . Specific environmental sounds such as long voice broadcasts.

When the first detection circuit 716 detects the aforementioned alarm signal or specific environmental sound, The first control circuit 114 of the first Bluetooth member device 110 can generate a corresponding detection signal DS, and use the first wireless communication circuit 715 to transmit the detection signal DS to the main control device 560 .

Similarly, the second detection circuit 726 can detect whether the second Bluetooth member device 120 receives a predetermined warning signal (for example, an earthquake warning message, a tsunami warning message, etc. sent by the official or other units through a telecommunications system or various wireless transmission mechanisms. ), or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or resident voice broadcasts, etc.).

For example, the second detection circuit 726 can detect whether the second Bluetooth member device 120 receives warning signals such as earthquake warning messages and tsunami warning messages from the official or other units through telecommunications systems or other wireless transmission mechanisms.

For another example, the second detection circuit 726 may receive sounds from the external environment and compare the received sounds with one or more predetermined sound models (for example, sound models of air raid sirens, tsunami sirens, or fire alarms). Yes, to determine whether specific environmental sounds such as air raid alarms, tsunami alarms, or fire alarms occur in the surrounding environment of the second Bluetooth member device 120 .

For another example, the second detection circuit 726 can receive sounds from the external environment, and perform voice content analysis and identification on the received sound content to determine whether various emergency broadcasts or intruders are occurring in the surrounding environment of the second Bluetooth member device 120 . Specific environmental sounds such as long voice broadcasts.

When the second detection circuit 726 detects the aforementioned alarm signal or specific environmental sound, the second control circuit 124 of the second Bluetooth member device 120 can generate a corresponding detection signal DS and use the second wireless communication circuit to 725 transmits the detection signal DS to the main control device 560 .

In the embodiment of FIG. 7 , when the communication circuit 561 of the master device 560 receives the detection signal DS from the first Bluetooth member device 110 or the second Bluetooth member device 120 , the processing circuit 565 generates an alarm notification ALN. , and uses the communication circuit 561 to transmit the alarm notification ALN to the audio broadcasting device 150 . When receiving the alarm notification ALN from the main control device 560, the audio broadcast device 150 can generate a corresponding target control command and transmit to the first Bluetooth member device 110 , the second Bluetooth member device 120 , the third Bluetooth member device 130 and the fourth Bluetooth member device 140 to indicate the first Bluetooth member device 110 , the second Bluetooth member device 120 and the third Bluetooth member device The device 130 and the fourth Bluetooth member device 140 reduce the volume below a predetermined threshold to prevent the user from missing alarm signals or specific environmental sounds coming from the outside. In this way, users can avoid being in dangerous situations without knowing it, or missing important information from the outside world and delaying the response time.

The audio broadcast device 150 in Figure 7 can perform the aforementioned process 302 and process 304 in Figure 3 when receiving the alarm notification ALN generated by the main control device 560, so as to transmit the target control command to multiple devices in the Bluetooth audio broadcast system 700. Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140.

The aforementioned descriptions of the implementation and connection methods of the relevant circuits and devices in FIG. 1 , FIG. 4 , FIG. 5 , or FIG. 6 are also applicable to the Bluetooth audio broadcast system 700 of FIG. 7 . The aforementioned descriptions of the generation and transmission methods of the predetermined data items and target data items in FIGS. 2 and 3 are also applicable to the Bluetooth audio broadcast system 700 of FIG. 7 . For the sake of brevity, the description will not be repeated here.

As can be seen from the foregoing description, in the Bluetooth audio broadcast system 700, the first Bluetooth member device 110 can use the first wireless communication circuit 715 to transmit the detection signal DS to the main control device 560, and the second Bluetooth member device 120 can use the second The wireless communication circuit 725 transmits the detection signal DS to the main control device 560 . However, this is only an exemplary embodiment and does not limit the actual implementation of the present invention. In practice, the first Bluetooth member device 110 or the second Bluetooth member device 120 can use other methods to transmit the detection signal DS to the main control device 560 .

For example, in another embodiment, the first Bluetooth member device 110 can use the first Bluetooth communication circuit 111 to transmit the detection signal DS to the main control device 560 , and the second Bluetooth member device 120 can use the second Bluetooth communication circuit 121 Send the detection signal DS to the main control device 560 . In this case, the aforementioned first wireless communication circuit 715 and/or the second wireless communication circuit 725 may be omitted.

In addition, in some embodiments, the second detection circuit 726 in the second Bluetooth member device 120 of FIG. 7 can also be omitted.

Please refer to FIG. 8 , which shows a simplified functional block diagram of a Bluetooth audio broadcast system 800 according to a sixth embodiment of the present invention. Similar to the Bluetooth audio broadcast system 700 in FIG. 7 , the Bluetooth audio broadcast system 800 in FIG. 8 also includes an audio broadcast device 150 and multiple Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110 , the second Bluetooth member device device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140), but the Bluetooth audio broadcast system 800 in FIG. 8 omits the aforementioned main control device 560.

In addition, slightly different from the aforementioned embodiment of FIG. 7 , some or all of the Bluetooth member devices in the Bluetooth audio broadcast system 800 of FIG. 8 also include a detection circuit, but the aforementioned wireless communication circuit is omitted. For example, in the embodiment of FIG. 8, the first Bluetooth member device 110 includes the aforementioned first Bluetooth communication circuit 111, first audio processing circuit 112, first audio playback circuit 113, first control circuit 114, and first detection circuit. Test circuit 716, but the first wireless communication circuit 715 is omitted. Similarly, the second Bluetooth member device 120 includes the aforementioned second Bluetooth communication circuit 121, second audio processing circuit 122, second audio playback circuit 123, second control circuit 124, and second detection circuit 726, but omitted. Second wireless communication circuit 725.

Other Bluetooth member devices in the Bluetooth audio broadcast system 800 in FIG. 8 can be configured with corresponding detection circuits according to the architecture of the first Bluetooth member device 110 or the second Bluetooth member device 120 described above.

In the embodiment of FIG. 8 , multiple Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110 , second Bluetooth member device 120 , third Bluetooth member device 130 , and fourth Bluetooth member device) in the Bluetooth audio broadcast system 800 The member devices 140) can jointly form a multi-member Bluetooth device, for example, a set of multi-channel Bluetooth speakers.

During operation, the Bluetooth audio broadcast system 800 in FIG. 8 can also use the aforementioned method in FIG. 2 to broadcast audio to the aforementioned multi-member Bluetooth devices.

In addition, during the audio broadcasting process by the audio broadcasting device 150 (that is, during the audio broadcasting process) When the broadcast device 150 repeats the process 222 and the process 224 of FIG. 2), the first detection circuit 716 can detect whether the first Bluetooth member device 110 receives a predetermined alarm signal (for example, the official or other unit through the telecommunications system Or earthquake warning messages, tsunami warning messages, etc. sent by various wireless transmission mechanisms), or specific environmental sounds (such as air raid sirens, fire alarms, emergency broadcasts, or village voice broadcasts, etc.). Similarly, the second detection circuit 726 can detect whether the second Bluetooth member device 120 receives a predetermined warning signal (for example, an earthquake warning message, a tsunami warning message, etc. sent by the official or other units through a telecommunications system or various wireless transmission mechanisms. ), or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or resident voice broadcasts, etc.).

The operation modes of the first detection circuit 716 and the second detection circuit 726 in the embodiment of FIG. 8 are respectively the same as the aforementioned first detection circuit 716 and the second detection circuit 726 in FIG. 7 .

When the first detection circuit 716 detects the aforementioned alarm signal or specific environmental sound, the first control circuit 114 of the first Bluetooth member device 110 can generate a corresponding detection signal DS and use the first Bluetooth communication circuit to 111 transmits the detection signal DS to the audio broadcast device 150 . Similarly, when the second detection circuit 726 detects the aforementioned alarm signal or specific environmental sound, the second control circuit 124 of the second Bluetooth member device 120 can generate a corresponding detection signal DS, and use the second The Bluetooth communication circuit 121 transmits the detection signal DS to the audio broadcasting device 150 .

When the audio broadcasting device 150 in Figure 8 receives the detection signal DS from the first Bluetooth member device 110 or the second Bluetooth member device 120, the audio broadcasting device 150 can perform the aforementioned process 302 and process 304 in Figure 3, To transmit the target control command to multiple Bluetooth member devices in the Bluetooth audio broadcast system 800 (for example, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and fourth Bluetooth member device 140).

The foregoing description of the implementation and connection methods of the relevant circuits and devices in FIG. 1 , FIG. 4 , FIG. 5 , FIG. 6 , or FIG. 7 is also applicable to the Bluetooth audio broadcast system 800 of FIG. 8 . The aforementioned production and transmission of predetermined data items and target data items in Figures 2 and 3 The description of the transmission method is also applicable to the Bluetooth audio broadcast system 800 of FIG. 8 . For the sake of brevity, the description will not be repeated here.

In some embodiments, the second detection circuit 726 in the second Bluetooth member device 120 of FIG. 8 can also be omitted.

It can be known from the description of FIG. 7 and FIG. 8 that before the multi-member Bluetooth devices in the Bluetooth audio broadcasting systems 700 and 800 start playing the predetermined audio data from the audio broadcasting device 150, the first Bluetooth member device 110 and the second Bluetooth member The device 120 will first adjust the volume of the first audio playback circuit 113 and the second audio playback circuit 123 to be close to or equal to the aforementioned predetermined volume according to the predetermined volume instruction from the audio broadcasting device 150 .

Therefore, when the first Bluetooth member device 110 starts to use the first audio playing circuit 113 to play the predetermined audio data from the audio broadcasting device 150, the volume emitted by the first audio playing circuit 113 will be close to or equal to the aforementioned predetermined volume. Similarly, when the second Bluetooth member device 120 starts to use the second audio playback circuit 123 to play the predetermined audio data from the audio broadcast device 150, the volume emitted by the second audio playback circuit 123 will also be close to or equal to the aforementioned predetermined volume. size.

In this way, the volume emitted when the first audio playback circuit 113 and the second audio playback circuit 123 start to play the predetermined audio data synchronously can make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, since the volume when the first audio playing circuit 113 and the second audio playing circuit 123 start to play the predetermined audio data synchronously has been preset to be close to or equal to the aforementioned predetermined volume, even if the audio broadcasting device 150 is in use It can also prevent users from being frightened by sudden audio broadcasts when the volume of the audio broadcast is too loud.

Similarly, other Bluetooth member devices in the Bluetooth audio broadcasting systems 700 and 800 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140), before starting to play the predetermined audio data transmitted from the audio broadcasting device 150 , it will first be broadcast based on the information The predetermined volume instructions sent from the playback device 150 respectively adjust the volume of the relevant audio playback circuit (not shown in the figure) to be close to or equal to the aforementioned predetermined volume. Therefore, the volume emitted by other Bluetooth member devices in the Bluetooth audio broadcast system 700 and 800 when they start to play predetermined audio data synchronously can also make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, during the process of the multi-member Bluetooth devices in the Bluetooth audio broadcast systems 700 and 800 playing the audio data broadcast by the audio broadcast device 150, the audio broadcast device 150 can also play the first Bluetooth member device 110 or the second Bluetooth member device 120. When the aforementioned alarm signal or specific environmental sound is detected, the alarm notification ALN sent from the main control device 560 or the detection signal DS sent from the first Bluetooth member device 110 and/or the second Bluetooth member device 120 , broadcasting a target control command to individual Bluetooth member devices to synchronously reduce the volume of individual Bluetooth member devices below a predetermined threshold. In other words, the aforementioned Bluetooth audio broadcast systems 700 and 800 can be used when the first Bluetooth member device 110 or the second Bluetooth member device 120 receives an alarm signal (such as an earthquake warning message, a tsunami warning message, etc.), or when the first Bluetooth member device 110 or the second Bluetooth member device 120 When specific environmental sounds occur in the surrounding environment of the device 110 or the second Bluetooth member device 120 (for example, air raid sirens, tsunami sirens, fire alarms, various emergency broadcasts, or local voice broadcasts, etc.), the Bluetooth audio broadcast system 700 is synchronized , the volume of different Bluetooth member devices in 800 is reduced below the predetermined threshold value to prevent users from missing alarm signals or specific sounds from the outside world, putting them in dangerous situations, or delaying response opportunities.

Furthermore, the Bluetooth audio broadcasting systems 700 and 800 use BLE audio technology for audio broadcasting, and the audio broadcasting device 150 can use a low-complexity communication codec (LC3) to encode predetermined audio data. Therefore, compared with the traditional audio broadcasting method, the aforementioned audio broadcasting method adopted by the Bluetooth audio broadcasting systems 700 and 800 can not only reduce the power consumption of the multi-member Bluetooth device, but also extend the usage time of the multi-member Bluetooth device. It can also effectively improve the overall audio quality of audio broadcasts.

Please refer to Figure 9, which illustrates a Bluetooth audio broadcast system according to a seventh embodiment of the present invention. 900 simplified functional block diagram.

In the embodiment of FIG. 9 , the Bluetooth audio broadcast system 900 includes an audio broadcast device 150 and a plurality of Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110 , second Bluetooth member device 120 , and third Bluetooth member device 130 , and the fourth Bluetooth member device 140), and one or more master devices. For convenience of explanation, only two exemplary main control devices are shown in the embodiment of FIG. 9 , namely a main control device 960 and a main control device 970 .

As shown in FIG. 9 , the main control device 960 includes a communication circuit 961 , a detection circuit 963 , and a processing circuit 965 . The communication circuit 961 is configured to communicate various data and instructions with multiple Bluetooth member devices in the Bluetooth audio broadcast system 900 using various wired or wireless transmission methods. The detection circuit 963 is configured to detect warning signals from the outside (for example, earthquake warning messages, tsunami warning messages), or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or mileage voice broadcasts). wait). The processing circuit 965 is coupled to the communication circuit 961 and the detection circuit 963, and is configured to generate a target control command when the detection circuit 963 detects the aforementioned alarm signal or specific environmental sound, and can use the communication circuit 961 The target control command is sent to multiple Bluetooth member devices in the Bluetooth audio broadcast system 900 .

In practice, the communication circuit 961 can be implemented by various wired transmission circuits, wireless transmission circuits, or hybrid circuits that integrate the aforementioned two communication mechanisms. The detection circuit 963 can be implemented using various suitable sound receiving and identifying circuits (for example, a combination of a microphone and a sound identifying circuit). The processing circuit 965 may utilize a single processor module, a combination of multiple processor modules, a single computer system, a combination of multiple computer systems, a single server, or multiple servers with appropriate computing power and instruction processing capabilities. combination to achieve.

In addition, in the embodiment of FIG. 9 , the first Bluetooth member device 110 includes the aforementioned first Bluetooth communication circuit 111 , first audio processing circuit 112 , first audio playback circuit 113 , first control circuit 114 , and first Wireless communication circuit 715. Similarly, the second Bluetooth The member device 120 includes the aforementioned second Bluetooth communication circuit 121, second audio processing circuit 122, second audio playback circuit 123, second control circuit 124, and second wireless communication circuit 725.

Similar to the aforementioned embodiment of FIG. 7 , the first wireless communication circuit 715 in FIG. 9 is coupled to the first control circuit 114 and is configured to use communication methods other than Bluetooth under the control of the first control circuit 114 . Various radio access technologies (RAT) communicate various data and/or instructions with the communication circuit 961 of the main control device 960 . Similarly, the second wireless communication circuit 725 is coupled to the second control circuit 124, and is configured to use various wireless access technologies except Bluetooth communication to communicate with the main control device under the control of the second control circuit 124. The communication circuit 961 of 960 communicates various data and/or instructions.

The operation of the Bluetooth audio broadcast system 900 will be further explained below with reference to FIG. 10 . FIG. 10 is a simplified flow chart of a method for audio broadcasting using BLE audio technology according to a second embodiment of the present invention.

When the user wants to use the first Bluetooth member device 110 and the second Bluetooth member device 120 in the Bluetooth audio broadcast system 900 to receive audio broadcasts, the first Bluetooth member device 110 and the second Bluetooth member device 120 can perform the steps in FIG. 10 Process 1002. In this embodiment, the operation method of the first Bluetooth member device 110 in the process 1002 is substantially the same as the aforementioned process 202 in FIG. The process 204 in Figure 2 is essentially the same.

As shown in FIG. 10 , when the audio broadcasting device 150 needs to broadcast audio, the process 206 to the process 210 in FIG. 10 can be performed. The operations of the audio broadcast device 150 in processes 206 to 210 in FIG. 10 are the same as the corresponding processes in FIG. 2 . That is, the audio broadcast device 150 may insert a predetermined volume indication corresponding to a predetermined volume level into one or more predetermined data items. In addition, the audio broadcasting device 150 can transmit the aforementioned one or more predetermined data items in a predetermined transmission mode, so that multiple Bluetooth member devices in the Bluetooth audio broadcasting system 900 (for example, the first Bluetooth member device 110, The second Bluetooth member device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 130 The tooth member device 140) can receive one or more of the aforementioned predetermined data items.

Then, the first Bluetooth member device 110 and the second Bluetooth member device 120 can perform the process 1012 and the process 1014 in FIG. 10 . In this embodiment, the operation modes of the first Bluetooth member device 110 in the process 1012 and the process 1014 are substantially the same as the aforementioned process 212 and the process 214 in FIG. 2 respectively, while the second Bluetooth member device 120 operates in the process 1012 and the process 1014. The operation method in 1014 is essentially the same as the process 212 and the process 218 in Figure 2 mentioned above.

Then, the first Bluetooth member device 110 and the second Bluetooth member device 120 can perform the process 1016 in FIG. 10 to set the gain value of the corresponding audio playback circuit according to the predetermined volume indication sent from the audio broadcast device 150 . In this embodiment, the operation method of the first Bluetooth member device 110 in the process 1016 is substantially the same as the aforementioned process 216 in FIG. 2 , and the operation method of the second Bluetooth member device 120 in the process 1016 is essentially the same as the aforementioned process 1016 . The process 220 in 2 is essentially the same.

For example, the first control circuit 114 can control the first audio processing circuit 112 to set the gain value of the first audio playback circuit 113 according to the predetermined volume instruction in process 1016, so as to pre-adjust the volume of the first audio playback circuit 113 to Close to or equal to the aforementioned predetermined volume level. Similarly, the second control circuit 124 can control the second audio processing circuit 122 to set the gain value of the second audio playback circuit 123 according to the predetermined volume instruction in process 1016, so as to pre-adjust the volume of the second audio playback circuit 123. to be close to or equal to the aforementioned predetermined volume.

In other words, in this embodiment, before playing the audio data transmitted from the audio broadcasting device 150, the first Bluetooth member device 110 and the second Bluetooth member device 120 will respectively The volume of the first audio playing circuit 113 and the second audio playing circuit 123 is adjusted to be close to or equal to the aforementioned predetermined volume.

As shown in FIG. 10 , after performing the process 210 , the audio broadcasting device 150 will also perform the process 222 and the process 224 . On the other hand, the first Bluetooth member device 110 and the second Bluetooth member device 120 can perform the process 1026, the process 1028, and the process 1030 in FIG. 10 . exist In this embodiment, the operation modes of the first Bluetooth member device 110 in the process 1026, the process 1028, and the process 1030 are substantially the same as the aforementioned processes 226, 228, and 230 in FIG. 2 respectively, while the second Bluetooth member device 110 The operation modes of the device 120 in the process 1026, the process 1028, and the process 1030 are essentially the same as the aforementioned processes 226, 232, and 234 in FIG. 2 respectively.

The audio broadcasting device 150 may repeatedly perform the process 222 and the process 224 in FIG. 10 to broadcast subsequent scheduled audio data. On the other hand, the first Bluetooth member device 110 and the second Bluetooth member device 120 can repeat the process 1026, the process 1028, and the process 1030 to receive and play subsequent scheduled audio data.

As can be seen from the foregoing description, the audio broadcast device 150 in FIG. 9 can also use the BLE audio technology specified by the Bluetooth core specification version 5.2 or a newer version to broadcast predetermined audio data. During operation, the audio broadcasting device 150 may send low-power Bluetooth audio packets including predetermined audio data to multiple Bluetooth member devices (for example, the first Bluetooth member device 110 ) in the Bluetooth audio broadcasting system 900 through the BIS logical transmission channel. , the second Bluetooth member device 120, the third Bluetooth member device 130, and the fourth Bluetooth member device 140) broadcast.

During the audio broadcasting process of the audio broadcasting device 150 of FIG. 9 (that is, during the process of the audio broadcasting device 150 repeating the process 222 and the process 224 of FIG. 10 ), the detection circuit 963 will detect whether the main control device 960 Receiving predetermined warning signals (for example, earthquake warning messages, tsunami warning messages, etc. sent by the official or other units through telecommunications systems or various wireless transmission mechanisms), or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts) , or voice broadcast, etc.).

For example, the detection circuit 963 can detect whether the main control device 960 receives warning signals such as earthquake warning messages and tsunami warning messages from the official or other units through telecommunications systems or other wireless transmission mechanisms.

For another example, the detection circuit 963 can receive sounds from the external environment and compare the received sounds with one or more predetermined sound models (for example, air raid sirens, tsunami sirens, or fire alarms). (disaster alarm sound model) to determine whether specific environmental sounds such as air raid alarms, tsunami alarms, or fire alarms occur in the surrounding environment of the main control device 960.

For another example, the detection circuit 963 can receive sounds from the external environment, and perform voice content analysis and identification on the received sound content to determine whether various emergency broadcasts or mileage voice broadcasts are occurring in the surrounding environment of the main control device 960 . Specific ambient sounds.

In the embodiment of FIG. 9 , the processing circuit 965 of the main control device 960 can perform the process 1032 in FIG. 10 when the detection circuit 963 detects the aforementioned alarm signal or specific environmental sound.

In process 1032, the processing circuit 965 can generate a corresponding target control command, and can use the communication circuit 961 to use various radio access technologies (RAT) other than Bluetooth communication methods to transmit the target control command to the first Bluetooth member device. 110 and the second wireless communication circuit 725 of the second Bluetooth member device 120 to instruct the first Bluetooth member device 110 and the second Bluetooth member device 120 to simultaneously reduce the volume below a predetermined threshold value.

In process 1034, the first wireless communication circuit 715 and the second wireless communication circuit 725 may receive the target control instruction from the main control device 960.

Then, the first Bluetooth member device 110 and the second Bluetooth member device 120 can perform the process 1036 to reduce the volume of the corresponding audio playback circuit below a predetermined threshold according to the target control command sent from the master control device 960 . In this embodiment, the operation mode of the first Bluetooth member device 110 in the process 1036 is substantially the same as the aforementioned process 310 in FIG. The process 314 in 3 is essentially the same.

For example, in process 1036, the first control circuit 114 can control the first audio processing circuit 112 to significantly reduce the gain value of the first audio playback circuit 113 or play the first audio according to the target control command transmitted from the main control device 960. The gain value of the circuit 113 is reduced below a predetermined level to reduce the volume of the first audio playback circuit 113 below a predetermined threshold value. Alternatively, the first control circuit 114 can control the first audio processing circuit 112 to switch the first audio playback circuit 113 to the silent mode, pause the first audio playback circuit 113 according to the target control instruction. The playback operation of the audio playback circuit 113 or the playback operation of the first audio playback circuit 113 is stopped.

Similarly, in process 1036, the second control circuit 124 can control the second audio processing circuit 122 to significantly reduce the gain value of the second audio playback circuit 123 or to change the second audio signal according to the target control command transmitted from the main control device 960. The gain value of the playback circuit 123 is reduced below a predetermined level to reduce the volume of the second audio playback circuit 123 below a predetermined threshold value. Alternatively, the second control circuit 124 can control the second audio processing circuit 122 to switch the second audio playback circuit 123 to a silent mode, pause the playback operation of the second audio playback circuit 123, or stop the second audio playback according to the target control instruction. Playback operation of circuit 123.

Since the first Bluetooth member device 110 and the second Bluetooth member device 120 adjust the volume according to the target control command transmitted from the master control device 960, when the first audio processing circuit 112 adjusts the volume of the first audio playback circuit 113 When the volume of the second audio processing circuit 123 drops below the predetermined threshold, the second audio processing circuit 122 will also simultaneously reduce the volume of the second audio playing circuit 123 to below the predetermined threshold.

In other words, during the process of the first Bluetooth member device 110 and the second Bluetooth member device 120 playing the audio data broadcast by the audio broadcast device 150, the main control device 960 can detect the aforementioned alarm signal or specific signal in the detection circuit 963. When there is ambient sound, a target control command is generated and transmitted to the first Bluetooth member device 110 and the second Bluetooth member device 120 to synchronously reduce the volume of the first Bluetooth member device 110 and the second Bluetooth member device 120 to a predetermined threshold value. the following.

In the aforementioned embodiment in which the first Bluetooth member device 110 and the second Bluetooth member device 120 are a pair of noise-cancelling headphones, the main control device 960 uses the target control command to instruct the first Bluetooth member device 110 and the second Bluetooth member After the device 120 reduces the volume below a predetermined threshold value, the device 120 may also use the communication circuit 961 to transmit a mode-switching command to the first Bluetooth member device 110 and the second Bluetooth member device 120 to instruct the first Bluetooth member device. The device 110 and the second Bluetooth member device 120 drop from one Switch the noise cancellation mode to a transparency mode to further increase the user's ability to receive external sounds.

In the aforementioned Bluetooth audio broadcast system 900, the communication circuit 961 of the master device 960 uses various radio access technologies (RAT) other than Bluetooth communication methods to transmit the target control instructions to the first Bluetooth member device 110. The wireless communication circuit 715, and the second wireless communication circuit 725 of the second Bluetooth member device 120. However, this is only an exemplary embodiment and does not limit the actual implementation of the present invention. In practice, the communication circuit 961 of the main control device 960 can use other transmission mechanisms to transmit the target control instructions to the first Bluetooth member device 110 and the second Bluetooth member device 120 .

For example, in another embodiment, the communication circuit 961 of the main control device 960 may instead use Bluetooth communication technology to transmit the target control instruction, so as to transmit the target control instruction to the first Bluetooth communication circuit 111 of the first Bluetooth member device 110. and the second Bluetooth communication circuit 121 of the second Bluetooth member device 120 . In this case, the first Bluetooth member device 110 can use the first Bluetooth communication circuit 111 to receive the target control instruction from the master control device 960, and the second Bluetooth member device 120 can use the second Bluetooth communication circuit 121 to receive the target control command from the master control device 960. Target control instructions sent from device 960. In this way, the first wireless communication circuit 715 and/or the second wireless communication circuit 725 in FIG. 9 can be omitted.

In some embodiments in which the communication circuit 961 of the main control device 960 uses Bluetooth communication technology to transmit target control instructions to the first Bluetooth member device 110 and the second Bluetooth member device 120, the processing circuit 965 of the main control device 960 can be compared to The audio broadcast device 150 operates in the aforementioned process 302 of FIG. 3 by inserting the target control command into one or more target data items.

For example, in some embodiments in which the aforementioned target data items are various Bluetooth advertising packets, the processing circuit 965 can insert the aforementioned subject control instructions into single or multiple specific fields of a single Bluetooth advertising packet, or disperse them. Insert multiple Bluetooth advertising packets into specific fields.

For another example, the aforementioned subject data items are various BIS protocol data units or BIG protocol In some embodiments of the data unit, the processing circuit 965 can insert the aforementioned target control instructions into a single or multiple specific fields of a single BIS protocol data unit or a BIG protocol data unit, or disperse it into multiple BIS protocols. In a specific field of a data unit or a BIG protocol data unit. As mentioned above, the aforementioned specific fields may be the event count (Event Counter) field, the sub-event count (Sub-Event Counter) field, or the payload counter (Payload Counter) in the BIS protocol data unit or the BIG protocol data unit. ) field and so on.

Next, the processing circuit 965 can control the communication circuit 961 to operate in a target transmission mode to transmit the aforementioned one or more target data items to the first target according to the operation mode of the audio broadcast device 150 in the aforementioned process 304 of FIG. 3 . The Bluetooth member device 110 and the second Bluetooth member device 120. The communication circuit 961 transmits the one or more target data items to the first Bluetooth member device 110 and the second Bluetooth member device 120 in the target transmission mode in the same manner as the process 304 and the process 306 in FIG. 3 . For the sake of brevity, the description will not be repeated here.

In practical applications, the main control device 960 can use the target control instructions to synchronously adjust other Bluetooth member devices in the Bluetooth audio broadcast system 900 in the same manner as the aforementioned method of adjusting the volume of the first Bluetooth member device 110 or the second Bluetooth member device 120 . (For example, the volume of the aforementioned third Bluetooth member device 130 and fourth Bluetooth member device 140). However, this is only an exemplary embodiment and does not limit the actual implementation of the present invention.

In practice, the volume of other Bluetooth member devices in the Bluetooth audio broadcast system 900 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140) can also be changed by another master control device (for example, Main control device 970) to control. In this case, the third Bluetooth member device 130 and the fourth Bluetooth member device 140 will simultaneously reduce the volume when playing the predetermined audio data to below a predetermined threshold according to the target control command generated by the master control device 970 .

Please refer to FIG. 11 , which shows a simplified functional block diagram of a Bluetooth audio broadcast system 1100 according to an eighth embodiment of the present invention. Similar to the Bluetooth audio broadcast system 900 in Figure 9, The Bluetooth audio broadcast system 1100 in FIG. 11 also includes an audio broadcast device 150 and a plurality of Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110, second Bluetooth member device 120, third Bluetooth member device 130, and Four Bluetooth member devices 140), a master device 960, and a master device 970.

Compared with the aforementioned embodiment of FIG. 9 , some or all of the Bluetooth member devices in the Bluetooth audio broadcast system 1100 of FIG. 11 also include a detection circuit. For example, in the embodiment of FIG. 11, in addition to the aforementioned first Bluetooth communication circuit 111, first audio processing circuit 112, first audio playback circuit 113, first control circuit 114, and first wireless communication circuit 715, The first Bluetooth member device 110 also includes a first detection circuit 716 . Similarly, in addition to the aforementioned second Bluetooth communication circuit 121, second audio processing circuit 122, second audio playback circuit 123, second control circuit 124, and second wireless communication circuit 725, the second Bluetooth member device 120 also A second detection circuit 726 is included.

In the first Bluetooth member device 110, the first detection circuit 716 is coupled to the first control circuit 114 and is configured to detect alarm signals from the outside (for example, earthquake warning messages, tsunami warning messages), or Specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or resident voice broadcasts, etc.). The first control circuit 114 can generate a detection signal DS when the first detection circuit 716 detects the aforementioned alarm signal or specific environmental sound, and uses the first wireless communication circuit 715 to transmit the detection signal DS to the main control unit. Device 960.

In the second Bluetooth member device 120, the second detection circuit 726 is coupled to the second control circuit 124 and is configured to detect alarm signals from the outside (for example, earthquake warning messages, tsunami warning messages), or Specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or resident voice broadcasts, etc.). The second control circuit 124 can generate a detection signal DS when the second detection circuit 726 detects the aforementioned alarm signal or specific environmental sound, and use the second wireless communication circuit 725 to transmit the detection signal DS to the main control unit. Device 960.

As mentioned above, the first detection circuit 716 and the second detection circuit 726 can be A suitable sound receiving and recognition circuit (for example, a combination of a microphone and a sound recognition circuit) is implemented. The first detection circuit 716 may be disposed outside the first Bluetooth member device 110 , or may be integrated with other functional blocks in the first Bluetooth member device 110 . Similarly, the second detection circuit 726 can be disposed outside the second Bluetooth member device 120 , or can be integrated with other functional blocks in the second Bluetooth member device 120 .

Other Bluetooth member devices in the Bluetooth audio broadcast system 1100 in FIG. 11 can be configured with corresponding detection circuits according to the architecture of the first Bluetooth member device 110 or the second Bluetooth member device 120 described above.

In the embodiment of FIG. 11 , the main control device 960 includes the aforementioned communication circuit 961 , a processing circuit 965 , and an input circuit 1163 . The input circuit 1163 is coupled to the processing circuit 965 and is configured to allow the user of the main control device 960 to perform various operations on the main control device 960, such as inputting instructions, setting the volume adjustment direction, or setting the volume adjustment amount, etc. In practice, the input circuit 1163 can be a keyboard, a mouse, a remote control, a touch screen, a touch pad, a button, a resistive touch circuit, a capacitive touch circuit, a gyroscope, a voice control input device, a gesture sensor device, and the like. It can be implemented by circuits using various other instruction generation technologies or a combination of the aforementioned devices.

The operation of the Bluetooth audio broadcast system 1100 in FIG. 11 will be further explained below with reference to FIG. 12 . FIG. 12 is a simplified flow chart of a method for audio broadcasting using BLE audio technology according to a third embodiment of the present invention.

Basically, the individual processes in Figure 12 operate in the same manner as the corresponding processes in the aforementioned embodiment of Figure 10 . Therefore, the Bluetooth audio broadcast system 1100 in FIG. 11 can broadcast audio to multiple Bluetooth member devices in the same manner as the Bluetooth audio broadcast system 900 in FIG. 9 .

However, during the process of audio broadcasting by the audio broadcasting device 150 (that is, during the process of the audio broadcasting device 150 repeating the process 222 and the process 224 of FIG. 12 ), the first detection circuit 716 can detect the first Bluetooth member. Whether the device 110 receives a predetermined alarm signal (for example, sent by an official or other unit through a telecommunications system or various wireless transmission mechanisms) earthquake warning messages, tsunami warning messages, etc.), or specific environmental sounds (such as air raid sirens, fire alarms, emergency broadcasts, or mileage voice broadcasts, etc.).

For example, the first detection circuit 716 can detect whether the first Bluetooth member device 110 receives warning signals such as earthquake warning messages and tsunami warning messages from the official or other units through telecommunication systems or other wireless transmission mechanisms.

For another example, the first detection circuit 716 may receive sounds from the external environment and compare the received sounds with one or more predetermined sound models (for example, sound models of air raid sirens, tsunami sirens, or fire alarms). Yes, to determine whether specific environmental sounds such as air raid alarms, tsunami alarms, or fire alarms occur in the surrounding environment of the first Bluetooth member device 110 .

For another example, the first detection circuit 716 can receive sounds from the external environment, and analyze and identify the voice content of the received sounds to determine whether various emergency broadcasts or intruders are occurring in the surrounding environment of the first Bluetooth member device 110 . Specific environmental sounds such as long voice broadcasts.

When the first detection circuit 716 detects the aforementioned alarm signal or specific environmental sound, the first control circuit 114 of the first Bluetooth member device 110 can generate a corresponding detection signal DS and use the first wireless communication circuit to 715 transmits the detection signal DS to the main control device 960 .

Similarly, the second detection circuit 726 can detect whether the second Bluetooth member device 120 receives a predetermined warning signal (for example, an earthquake warning message, a tsunami warning message, etc. sent by the official or other units through a telecommunications system or various wireless transmission mechanisms. ), or specific environmental sounds (for example, air raid sirens, fire alarms, emergency broadcasts, or resident voice broadcasts, etc.).

For example, the second detection circuit 726 can detect whether the second Bluetooth member device 120 receives warning signals such as earthquake warning messages and tsunami warning messages from the official or other units through telecommunication systems or other wireless transmission mechanisms.

For another example, the second detection circuit 726 may receive sounds from the external environment and compare the received sounds with one or more predetermined sound models (for example, air raid sirens, tsunami sirens, or A fire alarm sound model) is compared to determine whether specific environmental sounds such as air raid alarms, tsunami alarms, or fire alarms occur in the surrounding environment of the second Bluetooth member device 120 .

For another example, the second detection circuit 726 can receive sounds from the external environment, and perform voice content analysis and identification on the received sound content to determine whether various emergency broadcasts or intruders are occurring in the surrounding environment of the second Bluetooth member device 120 . Specific environmental sounds such as long voice broadcasts.

When the second detection circuit 726 detects the aforementioned alarm signal or specific environmental sound, the second control circuit 124 of the second Bluetooth member device 120 can generate a corresponding detection signal DS and use the second wireless communication circuit to 725 transmits the detection signal DS to the main control device 960 .

The difference from the aforementioned embodiment of Figure 10 is that in the embodiment of Figure 12, the processing circuit 965 of the main control device 960 receives the transmission from the first Bluetooth member device 110 or the second Bluetooth member device 120 in the communication circuit 961. When the detection signal DS is detected, process 1032 in Figure 12 is performed.

In process 1032, the processing circuit 965 can generate a corresponding target control command, and can use the communication circuit 961 to use various radio access technologies (RAT) other than Bluetooth communication methods to transmit the target control command to the first Bluetooth member device. 110 and the second wireless communication circuit 725 of the second Bluetooth member device 120 to instruct the first Bluetooth member device 110 and the second Bluetooth member device 120 to simultaneously reduce the volume below a predetermined threshold value.

In this case, the first Bluetooth member device 110 and the second Bluetooth member device 120 in FIG. 11 can perform the aforementioned process 1034 and process 1036 to receive the target control command from the master control device 960 and perform the target control command according to the target control command. , reducing the volume of the corresponding audio playback circuit below a predetermined critical value.

Since the first Bluetooth member device 110 and the second Bluetooth member device 120 adjust the volume according to the target control command transmitted from the master control device 960, when the first audio processing circuit 112 adjusts the volume of the first audio playback circuit 113 When it falls below a predetermined critical value, The second audio processing circuit 122 will also simultaneously reduce the volume of the second audio playing circuit 123 below a predetermined threshold value.

In other words, during the process of the first Bluetooth member device 110 and the second Bluetooth member device 120 playing the audio data broadcast by the audio broadcast device 150 , the main control device 960 can control the first Bluetooth member device 110 and/or the second Bluetooth member device. When 120 detects the aforementioned alarm signal or specific environmental sound, it generates and sends a target control command to the first Bluetooth member device 110 and the second Bluetooth member device 120 to synchronize the first Bluetooth member device 110 and the second Bluetooth member device 120 . The volume level of the member device 120 drops below a predetermined threshold.

In the aforementioned embodiment in which the first Bluetooth member device 110 and the second Bluetooth member device 120 are a pair of noise-cancelling headphones, the main control device 960 uses the target control command to instruct the first Bluetooth member device 110 and the second Bluetooth member After the device 120 reduces the volume below a predetermined threshold value, the device 120 may also use the communication circuit 961 to transmit a mode-switching command to the first Bluetooth member device 110 and the second Bluetooth member device 120 to instruct the first Bluetooth member device. The device 110 and the second Bluetooth member device 120 switch from a noise cancellation mode to a transparency mode to further increase the user's ability to receive external sounds.

Similar to the aforementioned embodiment of FIG. 9 , the communication circuit 961 of the main control device 960 in FIG. 11 can instead use Bluetooth communication technology to transmit the target control instructions to the first Bluetooth member device 110 of the first Bluetooth member device 110 . The communication circuit 111, and the second Bluetooth communication circuit 121 of the second Bluetooth member device 120. In this case, the first Bluetooth member device 110 can use the first Bluetooth communication circuit 111 to receive the target control instruction from the master control device 960, and the second Bluetooth member device 120 can use the second Bluetooth communication circuit 121 to receive the target control command from the master control device 960. Target control instructions sent from device 960. In this way, the first wireless communication circuit 715 and/or the second wireless communication circuit 725 in FIG. 11 can be omitted.

In addition, in some embodiments, the second detection circuit 726 in the second Bluetooth member device 120 of FIG. 11 can also be omitted.

The communication circuit 961 of the main control device 960 uses Bluetooth communication technology to transmit the target control instructions. In some embodiments of the first Bluetooth member device 110 and the second Bluetooth member device 120 , the processing circuit 965 of the main control device 960 can compare the operation mode of the audio broadcast device 150 in the aforementioned process 302 of FIG. 3 . Control instructions are inserted into one or more underlying data items. In addition, the processing circuit 965 can also control the communication circuit 961 to operate in a target transmission mode to transmit the aforementioned one or more target data items to the third target according to the operation mode of the audio broadcast device 150 in the aforementioned process 304 of FIG. 3 . A Bluetooth member device 110 and a second Bluetooth member device 120. The communication circuit 961 transmits the one or more target data items to the first Bluetooth member device 110 and the second Bluetooth member device 120 in the target transmission mode in the same manner as the process 304 and the process 306 in FIG. 3 . For the sake of brevity, the description will not be repeated here.

In practical applications, the main control device 960 in FIG. 11 can use the target control command to synchronously adjust the volume in the Bluetooth audio broadcast system 1100 in the same manner as the aforementioned method of adjusting the volume of the first Bluetooth member device 110 or the second Bluetooth member device 120 . The volume of other Bluetooth member devices (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140). However, this is only an exemplary embodiment and does not limit the actual implementation of the present invention.

In practice, the volume of other Bluetooth member devices in the Bluetooth audio broadcast system 1100 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140) can also be changed by another master control device (for example, Main control device 970) to control. In this case, the third Bluetooth member device 130 and the fourth Bluetooth member device 140 will synchronously adjust the volume when playing the predetermined audio data according to the target control command generated by the main control device 970 .

The foregoing description of the implementation and connection methods of the relevant circuits and devices in FIG. 9 is also applicable to the Bluetooth audio broadcast system 1100 of FIG. 11 . In addition, since the operation modes of individual processes in FIG. 12 are basically the same as the corresponding processes in the embodiment of FIG. 10 , the aforementioned description of the operation process of FIG. 10 is also applicable to the embodiment of FIG. 12 . For the sake of brevity, the description will not be repeated here.

It can be known from the description of FIGS. 9 to 12 that before the multi-member Bluetooth devices in the Bluetooth audio broadcasting systems 900 and 1100 start playing the predetermined audio data from the audio broadcasting device 150, the first Bluetooth member device 110 and the second Bluetooth member The device 120 will first adjust the volume of the first audio playback circuit 113 and the second audio playback circuit 123 to be close to or equal to the aforementioned predetermined volume according to the predetermined volume instruction from the audio broadcasting device 150 .

Therefore, when the first Bluetooth member device 110 starts to use the first audio playing circuit 113 to play the predetermined audio data from the audio broadcasting device 150, the volume emitted by the first audio playing circuit 113 will be close to or equal to the aforementioned predetermined volume. Similarly, when the second Bluetooth member device 120 starts to use the second audio playback circuit 123 to play the predetermined audio data from the audio broadcast device 150, the volume emitted by the second audio playback circuit 123 will also be close to or equal to the aforementioned predetermined volume. size.

In this way, the volume emitted when the first audio playback circuit 113 and the second audio playback circuit 123 start to play the predetermined audio data synchronously can make the user feel comfortable without causing discomfort or displeasure to the user.

In addition, since the volume when the first audio playing circuit 113 and the second audio playing circuit 123 start to play the predetermined audio data synchronously has been preset to be close to or equal to the aforementioned predetermined volume, even if the audio broadcasting device 150 is in use It can also prevent users from being frightened by sudden audio broadcasts when the volume of the audio broadcast is too loud.

Similarly, other Bluetooth member devices in the Bluetooth audio broadcasting systems 900 and 1100 (for example, the aforementioned third Bluetooth member device 130 and the fourth Bluetooth member device 140), before starting to play the predetermined audio data transmitted from the audio broadcasting device 150 , according to the predetermined volume instruction from the audio broadcast device 150, the volume of the relevant audio playback circuit (not shown in the figure) is adjusted to be close to or equal to the aforementioned predetermined volume. Therefore, the volume emitted by other Bluetooth member devices in the Bluetooth audio broadcast system 900 and 1100 when they start to play predetermined audio data synchronously can also make the user feel Comfortable without causing discomfort or discomfort to the user.

In addition, during the process of the multi-member Bluetooth devices in the Bluetooth audio broadcasting systems 900 and 1100 playing the audio data broadcast by the audio broadcasting device 150, the main control device 960 can also control the detection circuit 963, the first Bluetooth member device 110, and /Or when the second Bluetooth member device 120 detects the aforementioned alarm signal or specific environmental sound, it generates and sends a target control command to individual Bluetooth member devices (for example, the aforementioned first Bluetooth member device 110 and the second Bluetooth member device). Device 120) to synchronously reduce the volume of the relevant Bluetooth member device below a predetermined threshold. In other words, the aforementioned Bluetooth audio broadcast systems 900 and 1100 can receive an alarm signal (for example, earthquake warning message, tsunami warning message, etc.) when the master control device 960, the first Bluetooth member device 110, or the second Bluetooth member device 120. Or a specific environmental sound occurs in the surrounding environment of the main control device 960, the first Bluetooth member device 110, or the second Bluetooth member device 120 (for example, an air raid siren, a tsunami siren, a fire alarm, various emergency broadcasts, or a long voice). broadcast, etc.), simultaneously reduce the volume of different Bluetooth member devices in the Bluetooth audio broadcast system 900, 1100 below a predetermined threshold value to prevent users from missing alarm signals or specific sounds coming from the outside and being in danger. situation, or delayed response time.

Furthermore, the Bluetooth audio broadcasting systems 900 and 1100 use BLE audio technology for audio broadcasting, and the audio broadcasting device 150 can use a low-complexity communication codec (LC3) to encode predetermined audio data. Therefore, compared with the traditional audio broadcasting method, the aforementioned audio broadcasting method adopted by the Bluetooth audio broadcasting systems 900 and 1100 can not only reduce the power consumption of the multi-member Bluetooth device, but also extend the usage time of the multi-member Bluetooth device. It can also effectively improve the overall audio quality of audio broadcasts.

Please note that the process execution sequence in each of the foregoing flowcharts is only an exemplary embodiment and does not limit the actual implementation of the present invention.

For example, process 206 in Figure 2 can be adjusted to be performed before process 202 and/or process 204, or can be performed simultaneously with process 202 or process 204.

As another example, process 206 in Figure 10 and/or Figure 12 can be adjusted to proceed before process 1002. Yes, it can also be done at the same time as process 1002.

For another example, process 222 in Figure 2, Figure 10, and/or Figure 12 can be adjusted to be performed before process 208 and/or process 210, or can be performed simultaneously with process 208 or process 210.

For another example, in some embodiments, the aforementioned process 208 to process 220 in FIG. 2 may be omitted.

For another example, in some embodiments, the process 208, the process 210, the process 1012, the process 1014, and the process 1016 in the aforementioned FIG. 10 and FIG. 12 may also be omitted.

Certain words are used in the specification and patent application to refer to specific components, but those skilled in the art may use different terms to refer to the same component. This specification and patent application do not use differences in names as a way to distinguish components, but differences in functions of components as a basis for distinction. The "include" mentioned in the specification and patent application scope is an open-ended term and should be interpreted as "include but not limited to". In addition, the word "coupling" here includes any direct and indirect connection means. Therefore, if a first element is described as being coupled to a second element, it means that the first element can be directly connected to the second element through electrical connection or signal connection such as wireless transmission or optical transmission, or through other elements or connections. Means are indirectly electrically or signal connected to the second element.

The description "and/or" used in the specification includes one or any combination of multiple listed items. In addition, unless otherwise specified in the specification, any term in the singular shall also include the plural.

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention shall fall within the scope of the present invention.

110: First Bluetooth member device

111: The first Bluetooth communication circuit

112: First audio processing circuit

113: First audio playback circuit

114: First control circuit

120: Second Bluetooth member device

121: Second Bluetooth communication circuit

122: Second audio processing circuit

123: Second audio playback circuit

124: Second control circuit

130: Third Bluetooth member device

140: The fourth Bluetooth member device

150: Audio broadcast device

560:Master control device

561: Communication circuit

563:Detection circuit

565: Processing circuit

700:Bluetooth audio broadcast system

715: First wireless communication circuit

716: First detection circuit

725: Second wireless communication circuit

726: Second detection circuit

Claims (9)

A Bluetooth audio broadcasting system (700) includes: an audio broadcasting device (150) configured to broadcast one or more audio signals through a Broadcast Isochronous Stream (BIS) logical transport channel (logical transport). Bluetooth LE audio packet; a first Bluetooth member device (110), which includes: a first Bluetooth communication circuit (111) configured to receive the one or more Bluetooth LE audio packets packet; a first audio processing circuit (112); and a first control circuit (114), coupled to the first Bluetooth communication circuit (111) and the first audio processing circuit (112), configured to parse the The first Bluetooth communication circuit (111) receives the one or more low-power Bluetooth audio packets to obtain a predetermined audio data, and instructs the first audio processing circuit (112) to control a first audio playback circuit (113) Play the predetermined audio data; and a second Bluetooth member device (120), which includes: a second Bluetooth communication circuit (121) configured to receive the one or more low-power Bluetooth audio packets; a second audio processing circuit (122); and a second control circuit (124), coupled to the second Bluetooth communication circuit (121) and the second audio processing circuit (122), configured to analyze the second Bluetooth communication circuit (122) 121) Receive the one or more low-power Bluetooth audio packets to obtain the predetermined audio data, and instruct the second audio processing circuit (122) to control a second audio playback circuit (123) to play the predetermined audio data; Wherein, the audio broadcasting device (150) is also configured to be able to (110) or when the second Bluetooth member device (120) receives an alarm signal, or a specific environment occurs in the surrounding environment of the first Bluetooth member device (110) or the second Bluetooth member device (120) When the sound is heard, a target control command is generated and transmitted to the first Bluetooth member device (110) and the second Bluetooth member device (120); wherein the first Bluetooth communication circuit (111) is also configured to receive the target control instruction, and the first control circuit (114) is also configured to control the first audio processing circuit (112) to reduce a volume of the first audio playback circuit (113) to a predetermined threshold according to the target control instruction. value below; wherein, the second Bluetooth communication circuit (121) is also configured to receive the target control command, and the second control circuit (124) is also configured to control the second audio processing circuit according to the target control command. (122) Reduce a volume of the second audio playback circuit (123) below the predetermined threshold; wherein the audio broadcast device (150) is also configured to insert the target control command into one or more target data project, and transmit the one or more target data items; wherein the one or more target data items are selected from a group formed by the following items: one or more advertising indications (ADV_IND) packet; one or more non-connectable advertising indication (ADV_NONCONN_IND) packets; one or more discoverable advertisement indication (ADV_DISCOVER_IND) packets; one or more Broadcast Isochronous Streaming Protocol Data Units (BIS protocol data unit); and one or more broadcast isochronous group protocol data units (BIG protocol data unit). The Bluetooth audio broadcasting system (700) of claim 1, wherein the first Bluetooth member device (110) further includes a first detection circuit (716) configured to detect An alarm signal or a specific environmental sound from the outside world; when the first detection circuit (716) detects the alarm signal or the specific environmental sound, the first control circuit (114) Generate a detection signal (DS). The Bluetooth audio broadcasting system (700) of claim 2 further includes: a main control device (560), including: a communication circuit (561); and a processing circuit (565) coupled to the communication Circuit (561); wherein, the first control circuit (114) is also configured to use the first wireless communication circuit (715) to transmit the detection signal (DS) to the main control device (560); wherein, the processing The circuit (565) is configured to generate an alarm notification (ALN) when the communication circuit (561) receives the detection signal (DS) from the first Bluetooth member device (110), and utilizes the communication circuit (561) Send the alarm notification (ALN) to the audio broadcasting device (150); wherein the audio broadcasting device (150) generates the target control command when receiving the alarm notification (ALN). The Bluetooth audio broadcasting system (700) of claim 2, wherein the subject control instruction is used to instruct the first Bluetooth member device (110) and the second Bluetooth member device (120) to transmit the first Bluetooth member device (120) respectively. The volume of the audio playing circuit (113) and the second audio playing circuit (123) drops below the predetermined threshold value. The Bluetooth audio broadcasting system (700) of claim 2, wherein the target control command is a mute command, a pause command, or a stop command. The Bluetooth audio broadcast system (700) of claim 2, wherein the first Bluetooth communication circuit (111) is further configured to receive the one or more target data items, and the first control circuit (114) is further configured to receive the one or more target data items. It is configured to parse the one or more target data items to obtain the target control instruction, and to control the first audio processing circuit (112) to play the first audio according to the target control instruction. The volume of the circuit (113) drops below the predetermined threshold; wherein the second Bluetooth communication circuit (121) is also configured to receive the one or more target data items, and the second control circuit (124) is also configured to The one or more target data items can be parsed to obtain the target control instruction, and the second audio processing circuit (122) can be controlled according to the target control instruction to reduce the volume of the second audio playback circuit (123) to the below the predetermined critical value. A Bluetooth audio broadcasting system (700) includes: an audio broadcasting device (150) configured to broadcast one or more audio signals through a Broadcast Isochronous Stream (BIS) logical transport channel (logical transport). Bluetooth LE audio packet; a first Bluetooth member device (110), which includes: a first Bluetooth communication circuit (111) configured to receive the one or more Bluetooth LE audio packets packet; a first audio processing circuit (112); and a first control circuit (114), coupled to the first Bluetooth communication circuit (111) and the first audio processing circuit (112), configured to parse the The first Bluetooth communication circuit (111) receives the one or more low-power Bluetooth audio packets to obtain a predetermined audio data, and instructs the first audio processing circuit (112) to control a first audio playback circuit (113) Play the predetermined audio data; and a second Bluetooth member device (120), which includes: a second Bluetooth communication circuit (121) configured to receive the one or more low-power Bluetooth audio packets; a second audio processing circuit (122); and a second control circuit (124), coupled to the second Bluetooth communication circuit (121) and the second audio processing circuit (122), configured to parse the second Bluetooth The communication circuit (121) receives the one or more low-power Bluetooth audio packets to obtain the scheduled audio data, and instructs the second audio processing circuit (122) to control a second audio playback circuit (123) to play the scheduled audio data. Audio data; wherein, the audio broadcast device (150) is also configured to receive an alarm signal when the first Bluetooth member device (110) or the second Bluetooth member device (120), or when the first Bluetooth member device (120) receives an alarm signal. When a specific environmental sound occurs in the surrounding environment of the member device (110) or the second Bluetooth member device (120), a target control command is generated and transmitted to the first Bluetooth member device (110) and the second Bluetooth member device. (120); wherein, the first Bluetooth communication circuit (111) is also configured to receive the target control command, and the first control circuit (114) is also configured to control the first audio processing according to the target control command. The circuit (112) reduces a volume of the first audio playback circuit (113) below a predetermined threshold; wherein the second Bluetooth communication circuit (121) is also configured to receive the target control command, and the third The second control circuit (124) is also configured to control the second audio processing circuit (122) to reduce a volume of the second audio playback circuit (123) to below the predetermined threshold value according to the target control instruction; wherein, The audio broadcast device (150) is further configured to insert the target control instruction into one or more target data items and transmit the one or more target data items; wherein the one or more target data items are selected A group formed from: one or more auxiliary advertising indication (AUX_ADV_IND) packets; one or more extended advertising indication (ADV_EXT_IND) packets; one or more auxiliary link indications (auxiliary chain indication, AUX_CHAIN_IND) packet; One or more auxiliary scan response (AUX_SCAN_RSP) packets; one or more auxiliary synchronous indication (AUX_SYNC_IND) packets; one or more broadcast isochronous streaming protocol data units; and one or more Broadcast isochronous group agreement data unit. A Bluetooth audio broadcasting system (700) includes: an audio broadcasting device (150) configured to broadcast one or more audio signals through a Broadcast Isochronous Stream (BIS) logical transport channel (logical transport). Bluetooth LE audio packet; a first Bluetooth member device (110), which includes: a first Bluetooth communication circuit (111) configured to receive the one or more Bluetooth LE audio packets packet; a first audio processing circuit (112); and a first control circuit (114), coupled to the first Bluetooth communication circuit (111) and the first audio processing circuit (112), configured to parse the The first Bluetooth communication circuit (111) receives the one or more low-power Bluetooth audio packets to obtain a predetermined audio data, and instructs the first audio processing circuit (112) to control a first audio playback circuit (113) Play the predetermined audio data; and a second Bluetooth member device (120), which includes: a second Bluetooth communication circuit (121) configured to receive the one or more low-power Bluetooth audio packets; a second audio processing circuit (122); and a second control circuit (124), coupled to the second Bluetooth communication circuit (121) and the second audio processing circuit (122), configured to parse the second Bluetooth The communication circuit (121) receives the one or more low-power Bluetooth audio packets to obtain the scheduled audio data, and instructs the second audio processing circuit (122) to control a second audio playback circuit (123) to play the scheduled audio data. Audio data; wherein, the audio broadcast device (150) is also configured to receive an alarm signal when the first Bluetooth member device (110) or the second Bluetooth member device (120), or when the first Bluetooth member device (120) receives an alarm signal. When a specific environmental sound occurs in the surrounding environment of the member device (110) or the second Bluetooth member device (120), a target control command is generated and transmitted to the first Bluetooth member device (110) and the second Bluetooth member device. (120); wherein, the first Bluetooth communication circuit (111) is also configured to receive the target control command, and the first control circuit (114) is also configured to control the first audio processing according to the target control command. The circuit (112) reduces a volume of the first audio playback circuit (113) below a predetermined threshold; wherein the second Bluetooth communication circuit (121) is also configured to receive the target control command, and the third The second control circuit (124) is also configured to control the second audio processing circuit (122) to reduce a volume of the second audio playback circuit (123) to below the predetermined threshold value according to the target control instruction; wherein, The audio broadcast device (150) is further configured to insert the target control instruction into one or more target data items and transmit the one or more target data items; wherein the one or more target data items are selected A group formed from: one or more advertising indication packets; one or more unconnectable advertising indication packets; one or more searchable advertising indication packets; one or more auxiliary advertising indication packets; one or Multiple advertising extension instruction packets; one or more auxiliary link instruction packets; One or more auxiliary scan response packets; one or more auxiliary synchronization indication packets; one or more broadcast isochronous streaming protocol data units; and one or more broadcast isochronous group protocol data units. The Bluetooth audio broadcasting system (700) of claim 8, wherein the audio broadcasting device (150) is further configured to send a predetermined volume indication to the Bluetooth audio packet before broadcasting the one or more low-power Bluetooth audio packets. The first Bluetooth member device (110) and the second Bluetooth member device (120); wherein the first Bluetooth communication circuit (111) is also configured to receive the predetermined volume indication, and the first control circuit (114) It is also configured to control the first audio processing circuit (112) to pre-set the volume of the first audio playback circuit (113) according to the predetermined volume indication; wherein, the second Bluetooth communication circuit (121) is also configured to be able to The predetermined volume indication is received, and the second control circuit (124) is further configured to control the second audio processing circuit (122) to preset the volume of the second audio playback circuit (123) according to the predetermined volume indication.