CN210016611U - Extensible sound box system based on A2B bus - Google Patents
Extensible sound box system based on A2B bus Download PDFInfo
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- CN210016611U CN210016611U CN201921422542.2U CN201921422542U CN210016611U CN 210016611 U CN210016611 U CN 210016611U CN 201921422542 U CN201921422542 U CN 201921422542U CN 210016611 U CN210016611 U CN 210016611U
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Abstract
The utility model provides an expanded audio amplifier system based on A2B bus, include: A2B main speaker module and A2B auxiliary speaker module. The A2B master speaker module and at least one A2B slave speaker module are mounted on an A2B bus. The A2B master speaker module is connected with an external audio source, the A2B master speaker module is used for generating multi-channel audio signals according to the received external audio signals, outputting the single-channel audio signals to the speaker after the multi-channel audio signals are processed by a sound effect algorithm, and outputting the rest multi-channel audio signals to the A2B bus in a daisy chain mode. The A2B auxiliary sound box module is used for reading the audio data corresponding to the single-channel audio signal output to the node from the A2B bus and broadcasting the audio data. The utility model discloses can change the channel number of output audio frequency in a flexible way, reduce equipment development and use cost.
Description
Technical Field
The utility model relates to a power amplifier stereo set field especially relates to an expanded audio amplifier system based on A2B bus.
Background
With the promotion of people to the stereo experience demand, no matter car or family, people all more and more use more professional sound system now. The professional sound system has relatively high channel number and power, so that the wiring is relatively complex, particularly a vehicle-mounted power amplifier, and the electromagnetic compatibility of the system is influenced due to the fact that the dead weight of a vehicle is increased by a large number of wires. In response to the problem, in recent years, ADI company introduced a new digital audio bus technology for automobiles, called A2B bus, that only needs a set of wires to realize bidirectional transmission of 32 channels of audio data. The bus can not only transmit audio, but also carry out node fault diagnosis, thereby solving the problems of difficult wiring, weight increment, electromagnetic interference and the like on an automobile.
The existing sound boxes are designed and developed by manufacturers according to market demands, and cannot be changed at will, if users have higher listening needs, the original sound boxes are low in expansibility, and often only new sound systems can be bought again, so that great waste is caused to the users. In particular, because of the complexity of the acoustic environment in the vehicle and the limitation of the installation of the sound box, the vehicle-mounted sound system generally adopts a customized mode, and the vehicle manufacturers can customize different sound systems to the sound manufacturers according to different vehicle types and different vehicle grades. For example, Harman, Boss, etc. are all internationally known car stereo manufacturers. Because the current vehicle-mounted sound system has no expandability, different sounds customized by vehicle models with different levels, including hardware, software and systems, have strong irreplaceability, and are not convenient for expansion and upgrading.
In addition, since the sound system formed by the existing sound boxes has no expandability, manufacturers often develop different hardware platforms when aiming at users with different requirements, which also increases development period and cost and increases risk coefficient.
SUMMERY OF THE UTILITY MODEL
The utility model provides an expanded audio amplifier system based on A2B bus solves current audio amplifier system and can not require to change at will according to the audio of audience, does not have scalability problem, can change the audio amplifier quantity of output audio in a flexible way, reduces equipment development and use cost.
In order to achieve the above purpose, the utility model provides the following technical scheme:
an expandable sound box system based on an A2B bus, comprising: the A2B main sound box module and the A2B auxiliary sound box module;
the A2B master loudspeaker module and at least one A2B slave loudspeaker module are mounted on an A2B bus, the A2B master loudspeaker module is used as an A2B master node of the A2B bus, and the A2B slave loudspeaker module is used as an A2B slave node of the A2B bus;
the A2B master speaker module is connected with an external audio source, the A2B master speaker module is used for generating multi-channel audio signals according to the received external audio signals, outputting a single-channel audio signal to the speaker after being processed by a sound effect algorithm, and outputting the rest multi-channel audio signals to an A2B bus in a daisy chain manner;
the A2B master speaker module is further configured to output a control signal to the A2B bus according to the external audio signal, and broadcast the single-channel audio signal according to the control signal;
the A2B auxiliary sound box module is used for reading the audio data and the control signal corresponding to the single-channel audio signal output to the node from the A2B bus and broadcasting the audio data according to the control signal.
Preferably, the A2B master speaker module is further connected to an external power supply, and the A2B master speaker module converts the received ac power input by the external power supply into dc power and outputs the dc power to the A2B bus;
the A2B auxiliary sound box module obtains electric energy from the A2B bus.
Preferably, the A2B main speaker module includes: the loudspeaker comprises a first connector, an A2B main circuit unit and a first loudspeaker, wherein the first connector is provided with an analog audio input interface, a power input interface and an output interface;
the A2B main circuit unit is connected with an external audio source through the analog audio input interface, the A2B main circuit unit is connected with the external power source through the power input interface, and the A2B main circuit unit is connected with an A2B bus through the output interface and performs data interaction;
the output end of the A2B main circuit unit is connected to the input end of the first speaker, and the A2B main circuit unit is configured to perform signal processing on the external audio signal and drive the first speaker.
Preferably, the A2B main circuit unit includes: the device comprises a first AD conversion unit, a signal processing unit, a first DA conversion unit and a first amplification module;
the input end of the signal processing unit is connected with the output end of the first AD conversion unit, the first output end of the signal processing unit is connected with the input end of the first DA conversion unit, and the output end of the first DA conversion unit is connected with the input end of the first amplification module;
the input end of the first AD conversion unit is used as the input end of the A2B main circuit unit and is connected with the analog audio input interface;
the output end of the first DA conversion unit is used as the output end of the A2B main circuit unit and is connected with the input end of the first loudspeaker;
the signal processing unit is used for generating a multi-channel audio signal according to the external audio signal and carrying out sound effect algorithm processing.
Preferably, the A2B main circuit unit further includes: A2B master node chip;
the input end of the A2B main node chip is connected with the second output end of the signal processing unit, and the output end of the A2B main node chip is connected with the output interface of the first connector;
the A2B master node chip is used to output audio data and control signals to the A2B bus in a daisy chain fashion from multiple audio signals.
Preferably, the A2B main circuit unit further includes: a power supply module;
the input end of the power supply module is connected with the power supply input interface, and the power supply module is used for respectively supplying power to the first AD conversion unit, the signal processing unit, the DA conversion unit, the first amplification module and the A2B main node chip;
the power supply module is also connected with the A2B bus through the output interface of the first connector so as to output electric energy to the A2B bus.
Preferably, the signal processing unit is a DSP processor.
Preferably, the A2B auxiliary sound box module comprises: the second connector assembly, A2B auxiliary circuit unit and second loudspeaker, the said second connector assembly has power supply socket and A2B data interface;
the A2B sub-circuit unit is connected with the A2B bus through the A2B data interface to obtain the audio data and the control signal;
the A2B sub-circuit unit is also connected with the A2B bus through the power supply socket to receive the power output by the A2B bus;
the output terminal of the A2B sub-circuit unit is connected to the input terminal of the second speaker.
Preferably, the A2B sub-circuit unit includes: A2B slave node chip, second DA conversion unit and second amplification module;
the input end of the A2B slave node chip is connected with the A2B data interface, the output end of the A2B slave node chip is connected with the input end of the second DA conversion unit, and the output end of the second DA conversion unit is connected with the input end of the second amplification module;
the A2B slave node chip is used for receiving the audio data and the control signal corresponding to the single-channel audio signal of the node from the A2B bus.
Preferably, the second connector is a four-pin connector, wherein two pins are used as pins of the power socket, and the other two pins are used as pins of the A2B data interface.
The utility model provides an expanded audio amplifier system based on A2B bus, through a A2B main audio amplifier module and a plurality of A2B vice audio amplifier module of carry on A2B bus, make A2B main audio amplifier module to A2B bus output audio data and electric energy, A2B vice audio amplifier module acquires audio data and electric energy from A2B bus, accomplish the sound reproduction, the quantity through increasing or reducing vice audio amplifier changes the audio of system. The problem that the existing sound box system cannot be changed at will according to the sound effect requirements of audiences and does not have expandability is solved, the number of sound boxes for outputting audio can be flexibly changed, and the equipment development and use cost is reduced.
Drawings
In order to more clearly illustrate the specific embodiments of the present invention, the drawings used in the embodiments will be briefly described below.
Fig. 1 is a schematic diagram of an expandable sound box system based on an A2B bus according to the present invention;
fig. 2 is a schematic structural diagram of an A2B main speaker module provided by the present invention;
fig. 3 is a schematic structural diagram of A2B auxiliary speaker module provided by the present invention.
Reference numerals
1A 2B master speaker module
11 first connector
12A 2B main circuit unit
13 first loudspeaker
2A 2B auxiliary sound box module
21 second connector
22A 2B sub-circuit unit
23 second loudspeaker
3 external power supply
4 external audio source
Detailed Description
In order to make those skilled in the art better understand the solution of the embodiments of the present invention, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings and the implementation manner.
Aiming at the problems that the existing active sound box has no expandability, the number of channels is determined at the beginning of design, a user needs to research and develop the design according to different requirements in the using process, the sound effect requirements of audiences cannot be changed at will, and the expandability is not realized, and the equipment cost is improved. The utility model provides an expanded audio amplifier system based on A2B bus, through a A2B main audio amplifier module and a plurality of A2B vice audio amplifier module of carry on A2B bus, make A2B main audio amplifier module to A2B bus output audio data and electric energy, A2B vice audio amplifier module acquires audio data and electric energy from A2B bus, accomplish the sound reproduction, the quantity through increasing or reducing vice audio amplifier changes the audio of system. The problem that the existing sound box system cannot be changed at will according to the sound effect requirements of audiences and does not have expandability is solved, the number of sound boxes for outputting audio can be flexibly changed, and the equipment development and use cost is reduced.
As shown in fig. 1, an expandable sound box system based on A2B bus includes: A2B primary enclosure module 1 and A2B secondary enclosure module 2. The A2B master speaker module 1 and at least one A2B slave speaker module 2 are mounted on A2B bus, the A2B master speaker module 1 serves as A2B master node of the A2B bus, and the A2B slave speaker module 2 serves as A2B slave node of the A2B bus. A2B main audio amplifier module is connected with outside audio source 4, A2B main audio amplifier module 1 is used for generating multichannel audio signal according to receiving outside audio signal to process the back through audio algorithm, defeated this audio amplifier of single channel audio signal, with remaining multichannel audio signal according to the daisy chain mode to A2B bus output audio data, need to know the audio algorithm is prior art, not the utility model discloses an emphasis point. The A2B master speaker module 1 is further configured to output a control signal to the A2B bus according to the external audio signal, and broadcast the one-way sound signal according to the control signal. The A2B auxiliary speaker module 2 is configured to read the audio data and the control signal corresponding to the single-channel audio signal output to the node from the A2B bus, and broadcast the audio data according to the control signal.
Further, the A2B master speaker module is further connected to an external power supply 3, and the A2B master speaker module converts the received ac power input by the external power supply 3 into dc power and outputs the dc power to the A2B bus. The A2B auxiliary sound box module obtains electric energy from the A2B bus.
In practical applications, the A2B primary enclosure module may be regarded as A2B primary enclosure, and the A2B secondary enclosure module may be regarded as A2B secondary enclosure, and from the perspective of the entire sound system, the entire system includes a plurality of nodes, and both the primary enclosure and the secondary enclosure may be regarded as one node in the system, the primary enclosure is called a primary node, and the secondary enclosure is called a secondary node. The data transmission between each node must be completed through the bus, so the bus is the hub of the data transmission of the whole sound system, and all the sound boxes (nodes) are mounted on the bus of the system A2B. The main sound box is a key node of the system, is responsible for outputting audio and electric energy to a system bus, and is respectively connected with a data bus and a power supply bus in an A2B bus. The structure of each auxiliary sound box is consistent and can be reused completely, and the auxiliary sound boxes can obtain audio data and electric energy from the bus to finish the sound reproduction function of the sound box. Because of the consistency of the auxiliary sound boxes, the whole sound system can increase and reduce the number of the auxiliary sound boxes at will, the selection between sound effect and cost is convenient, and the expansibility of the system is improved. For example, desktop sound boxes around a computer usually only need 2 sound channels, so when a sound box system is constructed, only one main sound box and one auxiliary sound box are needed, and a stereo algorithm is implemented in the main sound box, or sound effect algorithms such as virtual bass can be added; if a user wants to improve the surround effect of the system, only 4 auxiliary sound boxes need to be additionally arranged on the bus without changing the original hardware of the main sound box and the auxiliary sound boxes, and in addition, the stereo algorithm in the main sound box is upgraded to the surround algorithm through online software upgrading, so that 5.1 surround sound effect can be realized, and the user cost is greatly saved.
As shown in fig. 2, the A2B main speaker module includes: a first connector 11, A2B a main circuit unit 12 and a first speaker 13, the first connector 11 being provided with an analog audio input interface, a power input interface and an output interface. The A2B main circuit unit 12 is connected with an external audio source through the analog audio input interface, the A2B main circuit unit 12 is connected with the external power source through the power input interface, and the A2B main circuit unit 12 is connected with the A2B bus through the output interface and performs data interaction. The output end of the A2B main circuit unit 12 is connected to the input end of the first speaker 13, and the A2B main circuit unit 12 is used for processing the external audio signal and driving the first speaker 13.
Specifically, the analog audio input interface may be a 3.5mm audio interface, or may be an audio interface of other forms, which is not specifically described herein, and is used to connect the analog audio signal of the external sound source to the main sound box. The power input interface can be a national standard 220v power plug, which is not specifically described here. The output interface comprises an A2B data interface and a power output interface, and a four-pin plug-in can be adopted, wherein 2 pins are used for transmitting A2B data and are used as data lines, and the other 2 pins are used for transmitting current and are used as power lines.
Further, the A2B main circuit unit includes: the device comprises a first AD conversion unit, a signal processing unit, a first DA conversion unit and a first amplification module. The input end of the signal processing unit is connected with the output end of the first AD conversion unit, the first output end of the signal processing unit is connected with the input end of the first DA conversion unit, and the output end of the first DA conversion unit is connected with the input end of the first amplification module. The input end of the first AD conversion unit is used as the input end of the A2B main circuit unit, and is connected to the analog audio input interface. The output end of the first DA conversion unit is used as the output end of the A2B main circuit unit and is connected with the input end of the first loudspeaker. The signal processing unit is used for generating a multi-channel audio signal according to the external audio signal and carrying out sound effect algorithm processing.
Further, the A2B main circuit unit further includes: A2B master node chip. The input end of the A2B main node chip is connected with the second output end of the signal processing unit, and the output end of the A2B main node chip is connected with the output interface of the first connector. The A2B master node chip is used to output audio data and control signals to the A2B bus in a daisy chain fashion from multiple audio signals.
Still further, the A2B main circuit unit further includes: and a power supply module. The input end of the power supply module is connected with the power supply input interface, and the power supply module is used for respectively supplying power to the first AD conversion unit, the signal processing unit, the DA conversion unit, the first amplification module and the A2B main node chip. The power supply module is also connected with the A2B bus through the output interface of the first connector so as to output electric energy to the A2B bus.
In practical application, the signal processing unit is a DSP processor. The first AD conversion unit collects the accessed analog audio signals, converts the analog audio signals into digital signals and then transmits the digital signals to the signal processing unit. The signal processing unit can select a digital signal processing chip (DSP processor) to perform relevant operation on input signals, and some sound effect processing algorithms are processed in the module, such as 5.1 surround sound, 7.1 surround sound, virtual bass, an amplitude limiter, sound channel expansion, equalization and the like. In the multi-channel digital signal generated in the signal processing module, the system selects a single-channel audio signal to be output to a first DA conversion unit in the sound box through a sound channel mapping technology, and the rest multi-channel audio signals are sent to an A2B main node chip in a certain sequence according to the layout of the loudspeaker system and can be sent in a daisy chain mode. The first DA unit is a one-way digital-to-analog converter, which is responsible for converting the processed one-way digital audio into analog audio, but these audio signals are still weak analog signals. The first amplification module is used for carrying out gain amplification on weak analog signals according to requirements and driving subsequent loudspeakers. After receiving the audio signal output by the signal processing module, the A2B master node chip outputs the audio data to the A2B bus through the A2B data interface in a certain manner. In addition, the current output by the main sound box power supply module is output to a power bus through a power line in the output interface, and electric energy is provided for the middle and auxiliary sound boxes of the system. The first loudspeaker is directly driven to emit sound after receiving the high-voltage audio signal output by the first amplifying module.
As shown in fig. 3, the A2B auxiliary speaker module includes: a second connector 21, an A2B secondary circuit unit 22 and a second speaker 23, said second connector 23 being provided with a power socket and an A2B data interface. The A2B sub-circuit unit 22 is connected to the A2B bus through the A2B data interface to acquire the audio data and the control signal. The A2B sub-circuit unit 22 is also connected to the A2B bus via the power patch socket to receive the power from the A2B bus. The output terminal of the A2B sub-circuit unit 22 is connected to the input terminal of the second speaker.
Further, the A2B sub-circuit unit includes: A2B slave node chip, a second DA conversion unit and a second amplifying module. The input end of the A2B slave node chip is connected with the A2B data interface, the output end of the A2B slave node chip is connected with the input end of the second DA conversion unit, and the output end of the second DA conversion unit is connected with the input end of the second amplification module. The A2B slave node chip is used for receiving the audio data and the control signal corresponding to the single-channel audio signal of the node from the A2B bus.
Specifically, similar to the main speaker module, the auxiliary speaker module also includes several parts such as a box body, a connector, a circuit unit, a speaker, etc., different from the main speaker module, the circuit unit of the auxiliary speaker module does not have digital signal processing capability, all the digital signal processing parts are completed in the main speaker module, and the auxiliary speaker module only performs digital-to-analog conversion and power amplification, so the auxiliary speaker module mainly includes an A2B slave node chip, a DA conversion module and an amplification module. The A2B slave node chip is responsible for reading the single-channel audio signal output to the node from the A2B bus and sending the signal to the digital-to-analog conversion module, and in addition, the chip also has the function of monitoring whether the node is normal or not, and if the node is not normal, the data is sent to the A2B bus in the form of messages. The DA conversion module is responsible for converting digital signals into analog signals, the converted analog signals are weak signals, and the signals are transmitted to the amplification module at the rear end. The amplifying module is a power amplifier and can linearly amplify the analog signal.
It should be noted that each auxiliary sound box includes a speaker, and the speaker directly drives the high-voltage audio signal output by the amplifying module, so as to emit sound.
Further, the second connector is a four-pin connector, wherein 2 pins are used as pins of the power socket, and the other 2 pins are used as pins of the A2B data interface.
Specifically, the connector of the A2B auxiliary speaker module is an input interface, and a 4-pin connector consistent with the main speaker module is used. 2 pins of the 4 pins of the connector are data pins, are responsible for data transmission between the auxiliary sound box module and an A2B bus and are data interfaces; the other 2 pins are power supply pins, are responsible for current transmission required by the auxiliary sound box and are power supply interfaces. Through the power interface, each module on the circuit board can obtain the required electric energy.
In practical application, the system can be applied to a plurality of sound fields, such as a vehicle-mounted power amplifier and a home theater. The common vehicle-mounted power amplifier systems are customized by automobile manufacturers to power amplifier manufacturers, automobiles of the same model produced by the common automobile manufacturers have different configurations such as low-level matching, medium-level matching and high-level matching, and sound systems carried by different configured automobile models are different and comprise the number of channels and the power. Generally, the number of sound channels of the low-mix vehicle model is small, the power is low, and the reverse is true of the high-mix vehicle model. Therefore, automobile manufacturers need to customize different power amplifier systems to match the requirements of the automobile models with different configuration levels, so that the development cost and the development period are increased, and even the risk of the product is increased. The problem can be solved by the extensible sound box of the system, an automobile manufacturer only needs to customize one set of sound system, the requirements of the sound systems of different configuration levels of automobile types are met by increasing or reducing the number of the auxiliary sound boxes, development cost and period are greatly reduced, and maintainability of the system is improved. Such as a sound system set-up schematic for a typical home theater. For a sound system constructed by common users, 5.1 surround sound effect can meet the requirement, but for some users at the level of federates, more extreme sound effect can be pursued, the number of channels can be increased, and at the moment, the purpose of channel expansion can be achieved only by increasing the number of auxiliary sound boxes and updating the software part of the main sound box, so that the cost is saved. In addition to home theaters, large theaters can use the sound box described in the scheme, different projection rooms are different in size, the number of required channels is different, and the system can greatly shorten the customizing period of the sound system.
It can be seen that, the utility model provides an expandable sound box system based on A2B bus, through a A2B main speaker module and a plurality of A2B vice speaker module of carry on the A2B bus, make A2B main speaker module to A2B bus output audio data and electric energy, A2B vice speaker module acquires audio data and electric energy from the A2B bus, accomplish the sound reproduction, the quantity through increasing or reducing vice speaker changes the audio of system. The problem that the existing sound box system cannot be changed at will according to the sound effect requirements of audiences and does not have expandability is solved, the number of sound boxes for outputting audio can be flexibly changed, and the equipment development and use cost is reduced.
The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.
Claims (10)
1. An expandable sound box system based on an A2B bus, comprising: the A2B main sound box module and the A2B auxiliary sound box module;
the A2B master loudspeaker module and at least one A2B slave loudspeaker module are mounted on an A2B bus, the A2B master loudspeaker module is used as an A2B master node of the A2B bus, and the A2B slave loudspeaker module is used as an A2B slave node of the A2B bus;
the A2B master speaker module is connected with an external audio source, the A2B master speaker module is used for generating multi-channel audio signals according to the received external audio signals, outputting a single-channel audio signal to the speaker after being processed by a sound effect algorithm, and outputting the rest multi-channel audio signals to an A2B bus in a daisy chain manner;
the A2B master speaker module is further configured to output a control signal to the A2B bus according to the external audio signal, and broadcast the single-channel audio signal according to the control signal;
the A2B auxiliary sound box module is used for reading the audio data and the control signal corresponding to the single-channel audio signal output to the node from the A2B bus and broadcasting the audio data according to the control signal.
2. The A2B bus-based expandable sound box system according to claim 1, wherein the A2B master sound box module is further connected to an external power supply, and the A2B master sound box module outputs electric power to the A2B bus after converting the received AC power inputted from the external power supply into DC power; the A2B auxiliary sound box module obtains electric energy from the A2B bus.
3. The A2B bus-based scalable sound box system of claim 2, wherein the A2B main sound box module comprises: the loudspeaker comprises a first connector, an A2B main circuit unit and a first loudspeaker, wherein the first connector is provided with an analog audio input interface, a power input interface and an output interface;
the A2B main circuit unit is connected with an external audio source through the analog audio input interface, the A2B main circuit unit is connected with the external power source through the power input interface, and the A2B main circuit unit is connected with an A2B bus through the output interface and performs data interaction;
the output end of the A2B main circuit unit is connected to the input end of the first speaker, and the A2B main circuit unit is configured to perform signal processing on the external audio signal and drive the first speaker.
4. The A2B bus-based expandable sound box system according to claim 3, wherein the A2B main circuit unit comprises: the device comprises a first AD conversion unit, a signal processing unit, a first DA conversion unit and a first amplification module;
the input end of the signal processing unit is connected with the output end of the first AD conversion unit, the first output end of the signal processing unit is connected with the input end of the first DA conversion unit, and the output end of the first DA conversion unit is connected with the input end of the first amplification module;
the input end of the first AD conversion unit is used as the input end of the A2B main circuit unit and is connected with the analog audio input interface;
the output end of the first DA conversion unit is used as the output end of the A2B main circuit unit and is connected with the input end of the first loudspeaker;
the signal processing unit is used for generating a multi-channel audio signal according to the external audio signal and carrying out sound effect algorithm processing.
5. The A2B bus-based expandable sound box system according to claim 4, wherein the A2B main circuit unit further comprises: A2B master node chip;
the input end of the A2B main node chip is connected with the second output end of the signal processing unit, and the output end of the A2B main node chip is connected with the output interface of the first connector;
the A2B master node chip is used to output audio data and control signals to the A2B bus in a daisy chain fashion from multiple audio signals.
6. The A2B bus-based expandable sound box system according to claim 5, wherein the A2B main circuit unit further comprises: a power supply module;
the input end of the power supply module is connected with the power supply input interface, and the power supply module is used for respectively supplying power to the first AD conversion unit, the signal processing unit, the DA conversion unit, the first amplification module and the A2B main node chip;
the power supply module is also connected with the A2B bus through the output interface of the first connector so as to output electric energy to the A2B bus.
7. The A2B bus-based expandable sound box system according to claim 6, wherein the signal processing unit is a DSP processor.
8. The A2B bus-based scalable sound box system of claim 1, wherein the A2B sub-sound box module comprises: the second connector assembly, A2B auxiliary circuit unit and second loudspeaker, the said second connector assembly has power supply socket and A2B data interface;
the A2B sub-circuit unit is connected with the A2B bus through the A2B data interface to obtain the audio data and the control signal;
the A2B sub-circuit unit is also connected with the A2B bus through the power supply socket to receive the electric energy output by the A2B bus;
the output terminal of the A2B sub-circuit unit is connected to the input terminal of the second speaker.
9. The A2B bus-based scalable sound box system according to claim 8, wherein the A2B sub-circuit unit comprises: A2B slave node chip, second DA conversion unit and second amplification module;
the input end of the A2B slave node chip is connected with the A2B data interface, the output end of the A2B slave node chip is connected with the input end of the second DA conversion unit, and the output end of the second DA conversion unit is connected with the input end of the second amplification module;
the A2B slave node chip is used for receiving the audio data and the control signal corresponding to the single-channel audio signal of the node from the A2B bus.
10. The A2B bus-based expandable sound box system according to claim 9, wherein the second connector is a four-pin connector, two pins of which are the pins of the power jack and the other two pins of which are the pins of the A2B data interface.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113301494A (en) * | 2021-05-25 | 2021-08-24 | 湖北亿咖通科技有限公司 | Audio playing system, control equipment and power amplifier equipment |
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2019
- 2019-08-29 CN CN201921422542.2U patent/CN210016611U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113301494A (en) * | 2021-05-25 | 2021-08-24 | 湖北亿咖通科技有限公司 | Audio playing system, control equipment and power amplifier equipment |
| CN113301494B (en) * | 2021-05-25 | 2022-09-02 | 亿咖通(湖北)技术有限公司 | Audio playing system, control equipment and power amplifier equipment |
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