CN108900981A - Transmission method, the apparatus and system of Bluetooth audio frequency data - Google Patents
Transmission method, the apparatus and system of Bluetooth audio frequency data Download PDFInfo
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- CN108900981A CN108900981A CN201810537260.0A CN201810537260A CN108900981A CN 108900981 A CN108900981 A CN 108900981A CN 201810537260 A CN201810537260 A CN 201810537260A CN 108900981 A CN108900981 A CN 108900981A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7156—Arrangements for sequence synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7156—Arrangements for sequence synchronisation
- H04B2001/71566—Tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses transmission method, the apparatus and systems of a kind of Bluetooth audio frequency data.Include by the method that main equipment is implemented：It is sent on CSB logical transport channel and uses the encrypted broadcast data of key, included at least in the broadcast data：Audio data and time information data；Synchronized tracking packet is sent in RF channel, includes the Channel Hopping Sequence of the main equipment in the synchronized tracking packet；The GATT that the main equipment described in low-power consumption bluetooth channels broadcast is supported is serviced, and includes CSB broadcast service in the GATT service, so that described find the main equipment from equipment.According to the present invention it is possible to realize that single-chip main equipment and multiple audio datas between equipment transmit.
Description
Technical field
The present invention relates to technical field of bluetooth communication, transmission method, dress more particularly, to a kind of Bluetooth audio frequency data
It sets and system.
Background technique
Transmission for audio data, usually will be first in main equipment and from Bluetooth pairing connection is established between equipment, then
Carry out the transmission of audio data.Specifically, as shown in Figure 1, main equipment and passing through Bluetooth audio frequency mode between equipment
Agreement (Advenced Audio Distribution Profile, A2DP) and audio and video remote control configuration protocol (Audio
Video Remote Cortrol Profile, AVRCP) realize audio data transmission.
Above-mentioned audio data transmission plan is based on A2DP agreement and AVRCP protocol realization, but the two agreements itself
Do not support a main equipment and multiple audio data transmission modes from equipment.If realizing the audio data of one master and multiple slaves
Transmission, needs that multiple Bluetooth chips or module are arranged in the host, as shown in Fig. 2, each Bluetooth chip in main equipment or
Module maintains one group of A2DP and AVRCP agreement to connect with a Bluetooth chip or module from the device.It is this in the host
It is high that the mode of the multiple Bluetooth chips or module hardware cost when realizing is set, and the slave equipment number that can be connected is also by bluetooth
The limitation of the quantity of chip or module cannot truly realize the audio data transmission of one master and multiple slaves.
Therefore, it has been recognised by the inventors that it is necessary to improve to technical problem of the existing technology.
Summary of the invention
It is an object of the present invention to provide a kind of new solutions of transmission for Bluetooth audio frequency data.
According to the first aspect of the invention, a kind of sending method of Bluetooth audio frequency data is provided, main equipment is applied to,
In, the method includes：
It is sent on CSB logical transport channel and uses the encrypted broadcast data of key, at least wrapped in the broadcast data
It includes：Audio data and time information data；
Synchronized tracking packet is sent in RF channel, includes the Channel Hopping Sequence of the main equipment in the synchronized tracking packet；
The GATT that the main equipment described in low-power consumption bluetooth channels broadcast is supported is serviced, wide comprising CSB in the GATT service
Service is broadcast, so that described find the main equipment from equipment.Optionally, the main equipment described in low-power consumption bluetooth channels broadcast is supported
GATT service after, further include：
It is connect with L2CAP is established from equipment；
It is connected by the L2CAP to described and sends service characteristic value from equipment；So that it is described from equipment according to the clothes
Characteristic value of being engaged in parses the broadcast data；Wherein, the service characteristic value includes at least broadcast data key and audio coding decoding
Device configuration parameter；
Disconnection and the L2CAP connection between equipment.
It optionally, further include control command data in the broadcast data.
According to the second aspect of the invention, a kind of method of reseptance of Bluetooth audio frequency data is provided, is applied to from equipment,
In, the method includes：
RF channel is monitored, includes the Channel Hopping Sequence of main equipment to obtain synchronized tracking packet, in the synchronized tracking packet；
According to the Channel Hopping Sequence, is obtained on CSB logical transport channel and uses the encrypted broadcast data of key,
It is included at least in the broadcast data：Audio data and time information data；
Low-power consumption bluetooth channel is monitored, the main equipment comprising CSB broadcast service in the GATT service of support is found.
Optionally, it searches out in the GATT service of support after the main equipment comprising CSB broadcast service, the method is also wrapped
It includes：
Obtain the service characteristic value of the main equipment；
According to the service characteristic value of the main equipment, the broadcast data of acquisition is parsed.
Optionally, the service characteristic value for obtaining the main equipment includes：
L2CAP is established with the main equipment to connect；
The service characteristic value that the main equipment is sent is received by the L2CAP connection；
Disconnect the L2CAP connection between the main equipment.
Optionally, the service characteristic value includes at least broadcast data key and audio codec configuration parameter；
The service characteristic value according to the main equipment parses the broadcast data of acquisition, including：
According to the broadcast data key, the broadcast data is decrypted；
From the broadcast data after decryption, audio data and time information data are obtained；
Using the audio codec configuration parameter, the audio data is decoded into initial data and is played out.
Optionally, further include：
Control command data is obtained from the broadcast data after decryption.
According to the third aspect of the invention we, a kind of Bluetooth audio frequency data sending device is provided, main equipment is applied to,
In, including：
First sending module uses the encrypted broadcast data of key for sending on CSB logical transport channel, described
It is included at least in broadcast data：Audio data and time information data；
Second sending module is set in the synchronized tracking packet comprising the master for sending synchronized tracking packet in RF channel
Standby Channel Hopping Sequence；
Broadcast module, for the GATT service that the main equipment described in low-power consumption bluetooth channels broadcast is supported, the GATT clothes
It include CSB broadcast service in business, so that described find the main equipment from equipment.
According to the fourth aspect of the invention, a kind of Bluetooth audio frequency data sink is provided, is applied to from equipment,
In, including：
First monitors module, for monitoring RF channel, to obtain synchronized tracking packet, sets in the synchronized tracking packet comprising master
Standby Channel Hopping Sequence；
Module is obtained, for obtaining on CSB logical transport channel and encrypting using key according to the Channel Hopping Sequence
Broadcast data afterwards includes at least in the broadcast data：Audio data and time information data；
Second monitors module, for monitoring low-power consumption bluetooth channel, finds in the GATT service of support comprising CSB broadcast clothes
The main equipment of business.
According to the fifth aspect of the invention, a kind of Transmission system of Bluetooth audio frequency data is provided, wherein including：
One Bluetooth audio frequency data sending device as described in the third aspect of the present invention；And
Multiple Bluetooth audio frequency data sinks as described in the fourth aspect of the present invention.
According to the present invention it is possible to realize that single-chip main equipment and multiple audio datas between equipment transmit.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 shows the system schematic of Bluetooth audio frequency data transmission between master-slave equipment in the prior art.
Fig. 2 shows the system signals that single main equipment in the prior art and two are transmitted from equipment room Bluetooth audio frequency data
Figure.
Fig. 3 shows the flow diagram of the sending method of the Bluetooth audio frequency data of first embodiment of the invention.
Fig. 4 shows the schematic block diagram of the Bluetooth audio frequency data sending device of first embodiment according to the present invention.
Fig. 5 shows the schematic block diagram of main equipment according to a first embodiment of the present invention.
Fig. 6 shows the flow diagram of the method for reseptance of the Bluetooth audio frequency data of second embodiment of the invention.
Fig. 7 shows the schematic block diagram of Bluetooth audio frequency data sink according to a second embodiment of the present invention.
Fig. 8 shows the schematic block diagram of slave equipment according to a second embodiment of the present invention.
Fig. 9 shows the schematic frame of the Transmission system of the Bluetooth audio frequency data of an example of third embodiment of the invention
Figure.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should be noted that：Unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
In the following, describing each embodiment according to the present invention and example with reference to the accompanying drawings.
<First embodiment>
<Method>
Fig. 3 shows the flow diagram of the sending method of the Bluetooth audio frequency data of first embodiment of the invention.The bluetooth
The sending method of audio data is implemented by main equipment.
Specifically, in step 3100, on the logical transport channel CSB (Connectionless Slave Broadcast)
It sends and uses the encrypted broadcast data of key, included at least in broadcast data：Audio data and time information data.
Wherein, CSB logical transport channel can be given encrypted broadcast data by single main equipment one-way transmission multiple
From equipment.Unlike the prior art, response is not necessarily to after receiving broadcast data from equipment, saving main equipment can use
To send the bandwidth of audio data.
It is encrypted specifically, main equipment can be sent on CSB logical transport channel at regular intervals using key
Broadcast data afterwards.Due to CSB logical transport be it is insecure, in practical application, a frame broadcast data can be repeated several times
It sends, to ensure that broadcast data can be received from equipment.
Main equipment and clock from equipment are generated by crystal oscillator, it is different from the device, the transmission road of audio data
Diameter may be different, and processor and working principle all may be different, and crystal oscillator can generate error, each from the Crystal Oscillator Errors of equipment product
After tired, clock can be different, play which results in respectively from the audio of equipment asynchronous.Therefore, in this step, main equipment will be certainly
Oneself crystal oscillator clock, i.e. time information data carrying be broadcast in broadcast data it is all from equipment so that accordingly from equipment
It is directed at crystal oscillator clock, realizes that multiple play from the audio of equipment synchronizes with this.
It further, can also include control command data in broadcast data.When user input on the master broadcasting, temporarily
Stop, F.F., the control commands such as rewind when, corresponding control command data is carried in broadcast data, it is each from equipment to control
Broadcasting, pause, F.F., the rewind of audio etc..
In step 3200, synchronized tracking packet is sent in RF channel, includes the channel hopping sequence of main equipment in synchronized tracking packet
Column.
Characteristic based on Bluetooth transmission, main equipment also needs to send synchronized tracking packet in RF channel, so as to connect in broadcast
The slave equipment of receipts mode can be realized synchronous with the bluetooth channel of main equipment according to Channel Hopping Sequence.
In step 3300, in GATT (the Generic Attribute that low-power consumption bluetooth channels broadcast main equipment is supported
Profile, general-purpose attribute configuration file) it services, it include CSB broadcast service in GATT service, so as to find main equipment from equipment.
It should be noted that the present embodiment is to the sequencing of the execution of above-mentioned steps 3100 to step 3300 without tool
Body limits.
Further, after the GATT service that low-power consumption bluetooth channels broadcast main equipment is supported, main equipment can also be with
L2CAP (Logical Link Control and Adaptation Protocol, logic link control and suitable are established from equipment
With agreement) connection.And connected by L2CAP to from equipment and send service characteristic value, so that from equipment according to service characteristic value solution
Analyse broadcast data.Wherein, service characteristic value includes at least broadcast data key and audio codec configuration parameter.It is taken sending
After characteristic value of being engaged in, disconnect and from the L2CAP connection between equipment.
<Device>
Fig. 4 shows the schematic block diagram of the Bluetooth audio frequency data sending device of first embodiment according to the present invention.This
The Bluetooth audio frequency data sending device of embodiment is applied to main equipment.
As shown in figure 4, Bluetooth audio frequency data sending device 4000 may include：
First sending module 4010 sends on CSB logical transport channel and uses the encrypted broadcast data of key, broadcast
It is included at least in data：Audio data and time information data.
Second sending module 4020 includes main equipment in synchronized tracking packet for sending synchronized tracking packet in RF channel
Channel Hopping Sequence.
Broadcast module 4030, the GATT for supporting in low-power consumption bluetooth channels broadcast main equipment are serviced, in GATT service
Comprising CSB broadcast service, so as to find main equipment from equipment.
It is well known by those skilled in the art that the development of the electronic information technology with such as large scale integrated circuit technology
With the trend of hardware and software, clearly to divide computer system soft and hardware boundary has seemed relatively difficult.Because appointing
What operation can be realized with software, can also be realized by hardware.The execution of any instruction can be completed by hardware, equally may be used
To be completed by software.Hardware implementations or software implement scheme are used for a certain machine function, depend on price, speed
The Non-technical factors such as degree, reliability, memory capacity, change cycle.For the technician, software realization mode and hardware
It is achieved in that equivalent.Technical staff can according to need selection software or hardware to realize above scheme.Therefore, here not
Specific software or hardware are limited.
<Main equipment>
Any one of above-described embodiment can be realized in the electronic equipment of mobile phone, tablet computer etc..For example,
Main equipment may include the Bluetooth audio frequency data sending device in above-described embodiment.
In addition, Fig. 5 shows the schematic block diagram of main equipment according to a first embodiment of the present invention.
As shown in figure 5, main equipment 5000 may include processor 5010, memory 5020, interface arrangement 5030, communication dress
Set 5040, display device 5050, input unit 5060, loudspeaker 5070, microphone 5080, etc..
Processor 5010 is such as can be central processing unit (CPU), microprocessor (MCU).Memory 5020 for example wraps
Include ROM (read-only memory), RAM (random access memory), nonvolatile memory of hard disk etc..Interface arrangement 5030
For example including USB interface, earphone interface etc..
Communication device 5040 has for example been able to carry out wired or wireless communication.
Display device 5050 is, for example, liquid crystal display, touch display screen etc..Input unit 5060 for example may include touching
Touch screen, keyboard etc..User can pass through 5080 inputting/outputting voice information of loudspeaker 5070 and microphone.
Main equipment shown in fig. 5 is only explanatory, and is never intended to limitation invention, its application, or uses.
In this embodiment, for storing instruction, instruction control when main equipment 5000 is run is handled memory 5020
Device 5010 executes the operation in the sending method of the Bluetooth audio frequency data of front reference Fig. 3.It will be appreciated by those skilled in the art that
Although multiple devices are shown in FIG. 5, the present invention can only relate to partial devices therein, for example, processor 5010
With memory 5020 etc..Technical staff can disclosed conceptual design instruction according to the present invention.Instruction how control processor into
Row operation, this is it is known in the art that therefore being not described in detail herein.
Detailed description of the invention the present embodiment is had been combined above, in the present embodiment, provides a kind of Bluetooth audio frequency data
Sending method, device and main equipment use the encrypted broadcast data of key by sending on CSB logical transport channel；?
RF channel sends synchronized tracking packet；In the GATT service that low-power consumption bluetooth channels broadcast main equipment is supported.Utilize classical bluetooth
Single-chip main equipment and multiple from equipment is completed in CSB logical transport channel and the cooperation of the ACL logical transport channel of low-power consumption bluetooth
Between Bluetooth audio frequency data transmission, can support the transmission of audio data and control command data simultaneously, realize really
One master and multiple slaves in meaning, hardware cost is low, and realizes respectively synchronous from the broadcasting of equipment room.
<Second embodiment>
<Method>
Fig. 6 shows the flow diagram of the method for reseptance of the Bluetooth audio frequency data of second embodiment of the invention.The bluetooth
The method of reseptance of audio data is applied to from equipment.
It include main equipment in synchronized tracking packet to obtain synchronized tracking packet specifically, monitoring RF channel in step 6100
Channel Hopping Sequence.
Can be according to the Channel Hopping Sequence of the main equipment of acquisition from equipment, realization is synchronous with the bluetooth channel of main equipment,
To obtain the broadcast data that main equipment is sent in corresponding bluetooth channel at the time of corresponding.
After bluetooth channel synchronizes, 6200 are entered step, according to Channel Hopping Sequence, is obtained on CSB logical transport channel
It takes and uses the encrypted broadcast data of key, included at least in broadcast data：Audio data and time information data.
Wherein, the crystal oscillator clock that can correct oneself according to time information data from equipment, makes its crystal oscillator with main equipment
Clock alignment, to realize that multiple play from the audio of equipment room synchronizes.
Further, in broadcast data can also include control command data, from equipment can according to control command data,
Execute the operation such as broadcasting, pause, F.F., rewind of audio.
In step 6300, low-power consumption bluetooth channel is monitored, finds the master comprising CSB broadcast service in the GATT service of support
Equipment.
From equipment after searching out the main equipment for supporting CSB broadcast service, the service characteristic value of main equipment is obtained.According to master
The service characteristic value of equipment parses the broadcast data of acquisition.
Wherein, the service characteristic value for obtaining main equipment, can specifically include：L2CAP is established with main equipment to connect.Pass through
L2CAP connection obtains the service characteristic value for carrying out autonomous device.It is disconnected between main equipment after obtaining service characteristic value from equipment
L2CAP connection.
Further, from equipment and main equipment establish L2CAP connect including：L2CAP connection is sent from equipment to main equipment
Request is established, after main equipment receives request, response message is sent to from equipment, to establish L2CAP connection.
Specifically, service characteristic value includes at least broadcast data key and audio codec configuration parameter.From equipment root
According to the service characteristic value of main equipment, the broadcast data for parsing acquisition may include：From equipment according to broadcast data key, decryption from
The broadcast data obtained on CSB logical transport channel obtains audio data and temporal information number from the broadcast data after decryption
According to.Audio codec configuration parameter is used from equipment, audio data is decoded into the initial data of PCM format, initial data
After Digital Signal Processing, by being played out from the audio interface drive the speaker sounding of equipment.
It should be noted that service characteristic value can also include broadcast service version number, the broadcast transmitting apparatus of main equipment
The information such as Bluetooth address, broadcast transmission state.The present embodiment is not especially limited this.
It further, can also be from the broadcast number after decryption from equipment if in broadcast data including control command data
According to middle acquisition control command data, to control broadcasting, pause of audio etc. according to control command data.
<Device>
Fig. 7 shows the schematic block diagram of Bluetooth audio frequency data sink according to a second embodiment of the present invention.This reality
The Bluetooth audio frequency data sink for applying example is applied to from equipment equipment.
As shown in fig. 7, Bluetooth audio frequency data sink 7000 may include：
First monitors module 7010, for monitoring RF channel, to obtain synchronized tracking packet, sets in synchronized tracking packet comprising master
Standby Channel Hopping Sequence.
Module 7020 is obtained, for obtaining on CSB logical transport channel and encrypting using key according to Channel Hopping Sequence
Broadcast data afterwards includes at least in broadcast data：Audio data and time information data.
Second monitors module 7030, for monitoring low-power consumption bluetooth channel, finds wide comprising CSB in the GATT service of support
Broadcast the main equipment of service.
It is well known by those skilled in the art that the development of the electronic information technology with such as large scale integrated circuit technology
With the trend of hardware and software, clearly to divide computer system soft and hardware boundary has seemed relatively difficult.Because appointing
What operation can be realized with software, can also be realized by hardware.The execution of any instruction can be completed by hardware, equally may be used
To be completed by software.Hardware implementations or software implement scheme are used for a certain machine function, depend on price, speed
The Non-technical factors such as degree, reliability, memory capacity, change cycle.For the technician, software realization mode and hardware
It is achieved in that equivalent.Technical staff can according to need selection software or hardware to realize above scheme.Therefore, here not
Specific software or hardware are limited.
<From equipment>
Here slave equipment can be the slave equipment including above-mentioned Bluetooth audio frequency data sink 7000.
In addition, Fig. 8 shows the schematic block diagram of slave equipment according to a second embodiment of the present invention.As shown in figure 8, from setting
It standby 8000 may include processor 8010, memory 8020, interface arrangement 8030, communication device 8040, display device 8050, defeated
Enter device 8060, etc..Although also may include loudspeaker, microphone etc. from equipment, these components and nothing of the present invention
It closes, therefore omits herein.
Processor 8010 is such as can be central processing unit (CPU), microprocessor (MCU).Memory 8020 for example wraps
Include ROM (read-only memory), RAM (random access memory), nonvolatile memory of hard disk etc..Interface arrangement 8030
For example including USB interface, serial line interface etc..
Communication device 8040 has for example been able to carry out wired or wireless communication.
Display device 8050 is, for example, liquid crystal display, touch display screen etc..Input unit 8060 for example may include touching
Touch screen, keyboard etc..
Shown in Fig. 8 from equipment is only explanatory, and is never intended to limitation invention, its application, or uses.
In this embodiment, for storing instruction, instruction control when running from equipment 8000 is handled memory 8020
Device 8010 executes the operation in the method for reseptance of the Bluetooth audio frequency data of front reference Fig. 6.It will be appreciated by those skilled in the art that
Although multiple devices are shown in FIG. 8, the present invention can only relate to partial devices therein, for example, processor 8010
With memory 8020 etc..Technical staff can disclosed conceptual design instruction according to the present invention.Instruction how control processor into
Row operation, this is it is known in the art that therefore being not described in detail herein.
Detailed description of the invention the present embodiment is had been combined above, in the present embodiment, provides a kind of Bluetooth audio frequency data
Method of reseptance, device and from equipment, by monitoring RF channel, to obtain synchronized tracking packet, set in synchronized tracking packet comprising master
Standby Channel Hopping Sequence；According to Channel Hopping Sequence, is obtained on CSB logical transport channel and use the encrypted broadcast of key
Data include at least in broadcast data：Audio data and time information data；Low-power consumption bluetooth channel is monitored, support is found
GATT service in include CSB broadcast service main equipment, and search out support CSB broadcast service main equipment after, by with
The L2CAP connection that main equipment is established, obtains the service characteristic value of main equipment to parse the broadcast data of acquisition.Utilize classical bluetooth
The ACL logical transport channel cooperation in CSB logical transport channel and low-power consumption bluetooth complete single-chip main equipment with multiple from setting
The transmission of Bluetooth audio frequency data between standby, can support the transmission of audio data and control command data simultaneously, realize true
One master and multiple slaves in positive meaning, hardware cost is low, and realizes respectively synchronous from the broadcasting of equipment room.
<3rd embodiment>
In the present embodiment, a kind of Transmission system of Bluetooth audio frequency data is provided, is provided including a first embodiment
The slave equipment 8000 that main equipment 5000 and multiple second embodiments provide.
Fig. 9 shows the schematic frame of the Transmission system of the Bluetooth audio frequency data of an example of third embodiment of the invention
Figure.A main equipment and one is shown from equipment.
As shown in figure 9, after main equipment obtains audio data, it is raw by audio coder, timestamp generator, broadcasting packet
Generation of growing up to be a useful person uses the encrypted broadcast data of key, includes at least audio data and time information data in broadcast data.
Main equipment is sent on CSB logical transport channel uses the encrypted broadcast data of key.It is sent in RF channel same
Walk tracking bag.In the GATT service that low-power consumption bluetooth channels broadcast main equipment is supported.It wherein, include main equipment in synchronized tracking packet
Channel Hopping Sequence.It include CSB broadcast service in GATT service.
From equipment by monitoring RF channel, the synchronized tracking packet that main equipment is sent is obtained, is obtained and is led according to synchronized tracking packet
The Channel Hopping Sequence of equipment is realized synchronous with the bluetooth channel of main equipment.It is realized from equipment same with the bluetooth channel of main equipment
After step, main equipment transmission is obtained on CSB logical transport channel uses the encrypted broadcast data of key.
Meanwhile it being searched out in the GATT service of support by monitoring low-power consumption bluetooth channel comprising CSB broadcast clothes from equipment
After the main equipment of business, L2CAP is established with main equipment and is connect, to obtain the service characteristic value of main equipment.
Specifically, main equipment is receiving after the L2CAP connection of equipment foundation request, established between equipment
L2CAP connection.Service characteristic value is generated according to broadcast data key and audio codec parameter, and will by L2CAP connection
Service characteristic value is sent to from equipment.
After the service characteristic value for receiving main equipment transmission by L2CAP connection from equipment, disconnect between main equipment
L2CAP connection.Then according to the service characteristic value of main equipment, the broadcast data obtained on CSB logical transport channel is parsed.
Specifically, decrypting the broadcast data obtained on CSB logical transport channel according to broadcast data key from equipment.
Broadcasting packet resolver obtains audio data and time information data from the broadcast data after decryption.Play time controller
Time synchronization is realized according to time information data.Audio decoder use audio codec configuration parameter, to audio data into
Row decoding, and decoded audio data is reduced to by original audio data by digital signal processor, via audio hardware
Interface is transferred to loudspeaker, plays out finally by loudspeaker.
It should be noted that can also include the control obtained from control command transmitting terminal in the broadcast data that main equipment generates
Order data processed.It is corresponding, from the broadcasting packet resolver of equipment control can also be got from the broadcast data after decryption
Order data.Control command receiving end can execute corresponding control operation according to control command data.
In the Transmission system of the Bluetooth audio frequency data, the CSB logical transport channel of classical bluetooth is utilized between master-slave equipment
With the ACL logical transport channel of low-power consumption bluetooth, cooperation completes single-chip main equipment and multiple bluetooth sounds between equipment
The transmission of frequency evidence can support the transmission of audio data and control command data simultaneously, realize a master truly
Mostly from hardware cost is low, and realizes respectively synchronous from the broadcasting of equipment room.
It is well known by those skilled in the art that the development of the electronic information technology with such as large scale integrated circuit technology
With the trend of hardware and software, clearly to divide computer system soft and hardware boundary has seemed relatively difficult.Because appointing
What operation can be realized with software, can also be realized by hardware.The execution of any instruction can be completed by hardware, equally may be used
To be completed by software.Hardware implementations or software implement scheme are used for a certain machine function, depend on price, speed
The Non-technical factors such as degree, reliability, memory capacity, change cycle.Therefore, for the ordinary skill of electronic information technical field
For personnel, mode more direct and that a technical solution is explicitly described is each operation described in the program.Knowing
In the case where road institute operation to be performed, those skilled in the art can directly set based on the considerations of to the Non-technical factor
Count out desired product.
The present invention can be system, method and/or computer program product.Computer program product may include computer
Readable storage medium storing program for executing, containing for making processor realize the computer-readable program instructions of various aspects of the invention.
Computer readable storage medium, which can be, can keep and store the tangible of the instruction used by instruction execution equipment
Equipment.Computer readable storage medium for example can be-- but it is not limited to-- storage device electric, magnetic storage apparatus, optical storage
Equipment, electric magnetic storage apparatus, semiconductor memory apparatus or above-mentioned any appropriate combination.Computer readable storage medium
More specific example (non exhaustive list) includes：Portable computer diskette, random access memory (RAM), read-only is deposited hard disk
It is reservoir (ROM), erasable programmable read only memory (EPROM or flash memory), static random access memory (SRAM), portable
Compact disk read-only memory (CD-ROM), digital versatile disc (DVD), memory stick, floppy disk, mechanical coding equipment, for example thereon
It is stored with punch card or groove internal projection structure and the above-mentioned any appropriate combination of instruction.Calculating used herein above
Machine readable storage medium storing program for executing is not interpreted that instantaneous signal itself, the electromagnetic wave of such as radio wave or other Free propagations lead to
It crosses the electromagnetic wave (for example, the light pulse for passing through fiber optic cables) of waveguide or the propagation of other transmission mediums or is transmitted by electric wire
Electric signal.
Computer-readable program instructions as described herein can be downloaded to from computer readable storage medium it is each calculate/
Processing equipment, or outer computer or outer is downloaded to by network, such as internet, local area network, wide area network and/or wireless network
Portion stores equipment.Network may include copper transmission cable, optical fiber transmission, wireless transmission, router, firewall, interchanger, gateway
Computer and/or Edge Server.Adapter or network interface in each calculating/processing equipment are received from network to be counted
Calculation machine readable program instructions, and the computer-readable program instructions are forwarded, for the meter being stored in each calculating/processing equipment
In calculation machine readable storage medium storing program for executing.
Computer program instructions for executing operation of the present invention can be assembly instruction, instruction set architecture (ISA) instructs,
Machine instruction, machine-dependent instructions, microcode, firmware instructions, condition setup data or with one or more programming languages
The source code or object code that any combination is write, the programming language include the programming language-of object-oriented such as
Smalltalk, C++ etc., and conventional procedural programming languages-such as " C " language or similar programming language.Computer
Readable program instructions can be executed fully on the user computer, partly execute on the user computer, be only as one
Vertical software package executes, part executes on the remote computer or completely in remote computer on the user computer for part
Or it is executed on server.In situations involving remote computers, remote computer can pass through network-packet of any kind
It includes local area network (LAN) or wide area network (WAN)-is connected to subscriber computer, or, it may be connected to outer computer (such as benefit
It is connected with ISP by internet).In some embodiments, by utilizing computer-readable program instructions
Status information carry out personalized customization electronic circuit, such as programmable logic circuit, field programmable gate array (FPGA) or can
Programmed logic array (PLA) (PLA), the electronic circuit can execute computer-readable program instructions, to realize each side of the invention
Face.
Referring herein to according to the method for the embodiment of the present invention, the flow chart of device (system) and computer program product and/
Or block diagram describes various aspects of the invention.It should be appreciated that flowchart and or block diagram each box and flow chart and/
Or in block diagram each box combination, can be realized by computer-readable program instructions.
These computer-readable program instructions can be supplied to general purpose computer, special purpose computer or other programmable datas
The processor of processing unit, so that a kind of machine is produced, so that these instructions are passing through computer or other programmable datas
When the processor of processing unit executes, function specified in one or more boxes in implementation flow chart and/or block diagram is produced
The device of energy/movement.These computer-readable program instructions can also be stored in a computer-readable storage medium, these refer to
It enables so that computer, programmable data processing unit and/or other equipment work in a specific way, thus, it is stored with instruction
Computer-readable medium then includes a manufacture comprising in one or more boxes in implementation flow chart and/or block diagram
The instruction of the various aspects of defined function action.
Computer-readable program instructions can also be loaded into computer, other programmable data processing units or other
In equipment, so that series of operation steps are executed in computer, other programmable data processing units or other equipment, to produce
Raw computer implemented process, so that executed in computer, other programmable data processing units or other equipment
Instruct function action specified in one or more boxes in implementation flow chart and/or block diagram.
The flow chart and block diagram in the drawings show the system of multiple embodiments according to the present invention, method and computer journeys
The architecture, function and operation in the cards of sequence product.In this regard, each box in flowchart or block diagram can generation
One module of table, program segment or a part of instruction, the module, program segment or a part of instruction include one or more use
The executable instruction of the logic function as defined in realizing.In some implementations as replacements, function marked in the box
It can occur in a different order than that indicated in the drawings.For example, two continuous boxes can actually be held substantially in parallel
Row, they can also be executed in the opposite order sometimes, and this depends on the function involved.It is also noted that block diagram and/or
The combination of each box in flow chart and the box in block diagram and or flow chart, can the function as defined in executing or dynamic
The dedicated hardware based system made is realized, or can be realized using a combination of dedicated hardware and computer instructions.It is right
For those skilled in the art it is well known that, by hardware mode realize, by software mode realize and pass through software and
It is all of equal value that the mode of combination of hardware, which is realized,.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In principle, the practical application or to the technological improvement in market for best explaining each embodiment, or make the art its
Its those of ordinary skill can understand each embodiment disclosed herein.The scope of the present invention is defined by the appended claims.
Claims (10)
1. a kind of sending method of Bluetooth audio frequency data is applied to main equipment, which is characterized in that the method includes：
It is sent on CSB logical transport channel and uses the encrypted broadcast data of key, included at least in the broadcast data：Sound
Frequency evidence and time information data；
Synchronized tracking packet is sent in RF channel, includes the Channel Hopping Sequence of the main equipment in the synchronized tracking packet；
The GATT that the main equipment described in low-power consumption bluetooth channels broadcast is supported is serviced, and CSB broadcast clothes are included in the GATT service
Business, so that described find the main equipment from equipment.
2. the method according to claim 1, wherein what the main equipment described in low-power consumption bluetooth channels broadcast was supported
After GATT service, further include：
It is connect with L2CAP is established from equipment；
It is connected by the L2CAP to described and sends service characteristic value from equipment；So that described special according to the service from equipment
Value indicative parses the broadcast data；Wherein, the service characteristic value includes at least broadcast data key and audio codec is matched
Set parameter；
Disconnection and the L2CAP connection between equipment.
3. the method according to claim 1, wherein further including control command data in the broadcast data.
4. a kind of method of reseptance of Bluetooth audio frequency data is applied to from equipment, which is characterized in that the method includes：
RF channel is monitored, includes the Channel Hopping Sequence of main equipment to obtain synchronized tracking packet, in the synchronized tracking packet；
According to the Channel Hopping Sequence, is obtained on CSB logical transport channel and use the encrypted broadcast data of key, it is described
It is included at least in broadcast data：Audio data and time information data；
Low-power consumption bluetooth channel is monitored, the main equipment comprising CSB broadcast service in the GATT service of support is found.
5. according to the method described in claim 4, it is characterized in that, searching out in the GATT service of support comprising CSB broadcast clothes
After the main equipment of business, the method also includes：
Obtain the service characteristic value of the main equipment；
According to the service characteristic value of the main equipment, the broadcast data of acquisition is parsed.
6. according to the method described in claim 5, it is characterized in that, the service characteristic value for obtaining the main equipment includes：
L2CAP is established with the main equipment to connect；
The service characteristic value that the main equipment is sent is received by the L2CAP connection；
Disconnect the L2CAP connection between the main equipment.
7. according to the method described in claim 5, it is characterized in that, the service characteristic value include at least broadcast data key and
Audio codec configuration parameter；
The service characteristic value according to the main equipment parses the broadcast data of acquisition, including：
According to the broadcast data key, the broadcast data is decrypted；
From the broadcast data after decryption, audio data and time information data are obtained；
Using the audio codec configuration parameter, the audio data is decoded into initial data and is played out.
8. a kind of Bluetooth audio frequency data sending device is applied to main equipment, which is characterized in that including：
First sending module uses the encrypted broadcast data of key, the broadcast for sending on CSB logical transport channel
It is included at least in data：Audio data and time information data；
Second sending module includes the main equipment in the synchronized tracking packet for sending synchronized tracking packet in RF channel
Channel Hopping Sequence；
Broadcast module, for the GATT service that the main equipment described in low-power consumption bluetooth channels broadcast is supported, in the GATT service
Comprising CSB broadcast service, so that described find the main equipment from equipment.
9. a kind of Bluetooth audio frequency data sink is applied to from equipment, which is characterized in that including：
First monitors module, includes main equipment in the synchronized tracking packet to obtain synchronized tracking packet for monitoring RF channel
Channel Hopping Sequence；
Module is obtained, for obtaining on CSB logical transport channel encrypted using key according to the Channel Hopping Sequence
Broadcast data includes at least in the broadcast data：Audio data and time information data；
Second monitors module, and for monitoring low-power consumption bluetooth channel, finding in the GATT service of support includes CSB broadcast service
Main equipment.
10. a kind of Transmission system of Bluetooth audio frequency data, wherein including：
One Bluetooth audio frequency data sending device as claimed in claim 8；And
Multiple Bluetooth audio frequency data sinks as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810537260.0A CN108900981A (en) | 2018-05-30 | 2018-05-30 | Transmission method, the apparatus and system of Bluetooth audio frequency data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810537260.0A CN108900981A (en) | 2018-05-30 | 2018-05-30 | Transmission method, the apparatus and system of Bluetooth audio frequency data |
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| CN108900981A true CN108900981A (en) | 2018-11-27 |
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| CN201810537260.0A Pending CN108900981A (en) | 2018-05-30 | 2018-05-30 | Transmission method, the apparatus and system of Bluetooth audio frequency data |
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| CN111093179A (en) * | 2019-12-27 | 2020-05-01 | 合肥中感微电子有限公司 | Wireless communication method, device and system |
| CN111698794A (en) * | 2020-06-24 | 2020-09-22 | 杭州国芯科技股份有限公司 | Wireless audio sharing method |
| CN111788836A (en) * | 2020-02-03 | 2020-10-16 | 深圳市汇顶科技股份有限公司 | Data transmission method and BLE equipment |
| CN111918262A (en) * | 2020-08-15 | 2020-11-10 | 北京百瑞互联技术有限公司 | Low-power-consumption Bluetooth communication method and system for rapidly discovering GATT service |
| CN112055314A (en) * | 2019-06-28 | 2020-12-08 | 合肥炬芯智能科技有限公司 | Bluetooth broadcast communication method, system and master device and slave device thereof |
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| CN112367649A (en) * | 2020-09-29 | 2021-02-12 | 北京软慧科技有限公司 | Data discovery method and device of low-power-consumption Bluetooth and electronic equipment |
| CN112771890A (en) * | 2018-12-07 | 2021-05-07 | 华为技术有限公司 | Point-to-multipoint data transmission method and electronic equipment |
| CN113225691A (en) * | 2021-04-02 | 2021-08-06 | 北京小米移动软件有限公司 | Audio processing method, device and storage medium |
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| CN112367649A (en) * | 2020-09-29 | 2021-02-12 | 北京软慧科技有限公司 | Data discovery method and device of low-power-consumption Bluetooth and electronic equipment |
| CN114648866A (en) * | 2020-12-18 | 2022-06-21 | 瑞昱半导体股份有限公司 | Bluetooth audio broadcasting system and multi-member Bluetooth device |
| CN113225691A (en) * | 2021-04-02 | 2021-08-06 | 北京小米移动软件有限公司 | Audio processing method, device and storage medium |
| CN113225691B (en) * | 2021-04-02 | 2022-07-08 | 北京小米移动软件有限公司 | Audio processing method, device and storage medium |
| CN113328817A (en) * | 2021-08-03 | 2021-08-31 | 北京百瑞互联技术有限公司 | LE broadcast audio stream fast forward and backward method, device, system, medium and equipment |
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