Audio bus system and audio bus connection method

Abstract

The invention discloses an audio bus system and an audio bus connection method, and relates to the technical field of audio bus connection, the system comprises a master node and a plurality of slave nodes; the second bus transmit-receive interface of the master node is connected with one bus transmit-receive interface of the first slave node to form a master link; the first bus transmit-receive interface of the master node is connected with one bus transmit-receive interface of the first slave node to form an auxiliary link; starting from the second slave node, one bus transceiving interface of each subsequent slave node is connected with one bus transceiving interface of the previous slave node; the controller is used for controlling only operation of the main link when the audio data transmission load is not greater than a preset threshold value; and when the audio data transmission load is greater than a preset threshold value, controlling to operate the main link and the auxiliary link at the same time. According to the application, the problems of link blockage, data loss, poor data integrity and the like caused by excessive bandwidth occupation can be solved on the premise of not increasing the number of nodes and the length of a cable.

Description

Technical Field

[0001] This application relates to the field of audio bus connection technology, and in particular to an audio bus system and an audio bus connection method. Background Technology

[0002] An audio bus system consists of a master node and multiple slave nodes in a daisy-chain topology, transmitting audio data bidirectionally via time-division half-duplex communication. Audio data is transmitted sequentially downlink to the next-level node or sequentially uplink to the previous-level node via the bus. The master node can connect to a controller, and slave nodes can connect to external devices such as microphones and amplifiers. The master node's controller controls the slave nodes and their connected external devices via the bus. When the data transmission rate of the audio bus system is too high, leading to excessive bandwidth consumption, problems such as link congestion, data loss, and deterioration of data integrity can easily occur.

[0003] In existing technologies, this is mainly achieved by running a daisy-chain consisting of two master and slave nodes in parallel. The two master nodes are connected to the same controller, and the slave node with the higher audio data transmission rate is at the same level in the daisy chain and connected to the same external device. The slave nodes at the same level are clock-synchronized. This method can improve data transmission bandwidth, but it increases the number of nodes and cable length, making installation and maintenance complex and the overall cost high. Summary of the Invention

[0004] The purpose of this application is to provide an audio bus system and an audio bus connection method that can solve problems such as link congestion, data loss, and deterioration of data integrity caused by excessive bandwidth usage without increasing the number of nodes and cable length.

[0005] To achieve the above objectives, this application provides the following solution: In a first aspect, this application provides an audio bus system, comprising: a master node and several slave nodes; The master node and several slave nodes are connected in a daisy-chain topology. The master node and each of the slave nodes are provided with at least two bus transceiver interfaces; The second bus transceiver interface of the master node is connected to a bus transceiver interface of the first slave node to form a main link; The first bus transceiver interface of the master node is connected to a bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, each subsequent slave node connects one bus transceiver interface to one bus transceiver interface of the previous slave node; The master node is connected to the controller, and the slave nodes are respectively connected to audio devices; The controller is used for: When the audio data transmission load is no greater than a preset threshold, control only the main link to run; When the audio data transmission load exceeds a preset threshold, the main link and the auxiliary link are controlled to run simultaneously.

[0006] Optionally, the auxiliary link is clock-synchronized with the main link.

[0007] Optionally, when both the master node and each of the slave nodes are provided with two bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node to form a main link; The first bus transceiver interface of the master node is connected to the second bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, the first bus transceiver interface of each subsequent slave node is connected to the second bus transceiver interface of the previous slave node.

[0008] Optionally, when both the master node and each of the slave nodes are equipped with three bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node to form a main link; The third bus transceiver interface of the master node is connected to the third bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, the first bus transceiver interface of each subsequent slave node is connected to the second bus transceiver interface of the previous slave node.

[0009] Optionally, the controller is specifically used for: When the audio data traffic load is not greater than the first preset threshold, or the bandwidth usage is not greater than the second preset threshold, the control will only run the main link; When the audio data traffic load exceeds a first preset threshold, or the bandwidth usage exceeds a second preset threshold, the main link and the auxiliary link are controlled to run simultaneously.

[0010] Optionally, the auxiliary link is an optional redundant link that is dynamically configured to operate based on the audio data transmission load requirements.

[0011] Optionally, each of the slave nodes includes: a clock recovery circuit; the slave node recovers the clock using a signal sent by the master node or an upstream slave node; The clock serves as: The working clock of this slave node; The receiving clock of the auxiliary link; The transmit clock of the bus transceiver interface of this slave node.

[0012] Secondly, this application provides an audio bus connection method, including: The second bus transceiver interface of the master node is connected to one bus transceiver interface of the first slave node to form a main link; the master node and several slave nodes are connected in a daisy chain topology; the master node and each of the slave nodes are provided with at least two bus transceiver interfaces. The first bus transceiver interface of the master node is connected to a bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, connect one bus transceiver interface of each subsequent slave node to one bus transceiver interface of the previous slave node; Connect the master node to the controller; Connect several of the slave nodes to audio devices respectively; The controller enables or disables the auxiliary link based on whether the audio data transmission load exceeds a preset threshold.

[0013] Optionally, when both the master node and each of the slave nodes are provided with two bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node to form a main link; The first bus transceiver interface of the master node is connected to the second bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, connect the first bus transceiver interface of each subsequent slave node to the second bus transceiver interface of the previous slave node.

[0014] Optionally, the use of a controller to control the activation and deactivation of the auxiliary link based on whether the audio data transmission load exceeds a preset threshold specifically includes: Using the controller, when the audio data traffic load is no greater than a first preset threshold, or the bandwidth usage is no greater than a second preset threshold, the controller will control only the main link to run. Using a controller, when the audio data traffic load exceeds a first preset threshold, or the bandwidth usage exceeds a second preset threshold, the main link and the auxiliary link are operated simultaneously.

[0015] According to the specific embodiments provided in this application, this application has the following technical effects: This application provides an audio bus system and an audio bus connection method. The system includes: a master node and several slave nodes; the master node and several slave nodes are connected in a daisy-chain topology; each master node and each slave node is provided with at least two bus transceiver interfaces; the second bus transceiver interface of the master node is connected to one bus transceiver interface of the first slave node to form a main link; the first bus transceiver interface of the master node is connected to one bus transceiver interface of the first slave node to form an auxiliary link; starting from the second slave node, one bus transceiver interface of each subsequent slave node is connected to one bus transceiver interface of the previous slave node; the master node is connected to a controller, and the several slave nodes are respectively connected to audio devices; the controller is used to: control the operation of only the main link when the audio data transmission load is not greater than a preset threshold; and control the operation of both the main link and the auxiliary link simultaneously when the audio data transmission load is greater than the preset threshold. This application substantially increases the total bandwidth of system data transmission without changing the basic daisy-chain topology by adding a dynamically enabled auxiliary link between the master node and the first slave node, which can transmit data in parallel with the existing main link. When the system faces sudden surges in data traffic, the controller can promptly activate the auxiliary link, effectively preventing problems such as link congestion, data loss, and poor integrity caused by insufficient bandwidth, thus ensuring the stability and reliability of audio data transmission. Moreover, this application eliminates the need for deploying two complete master-slave node links as in existing technologies. It only requires adding a single connecting cable (auxiliary link) to the existing single daisy-chain architecture and utilizing the existing redundant interfaces of the nodes to achieve bandwidth expansion. This avoids a doubling of the number of nodes, significantly reducing the required hardware, cable length, and connection points, thereby lowering the overall material cost, installation and wiring complexity, and long-term maintenance difficulty of the system. Furthermore, the auxiliary link in this application is not always running; instead, it is dynamically controlled by the controller based on real-time monitoring of the system's data transmission load. When data traffic is normal, only the main link operates, saving energy and resources; the auxiliary link is only activated when high load demand is detected. This on-demand intelligent configuration mechanism allows the system to maintain performance while also being economical and adaptable, flexibly responding to changing needs in different application scenarios. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of an audio bus system provided in an embodiment of this application, where both the master node and each slave node are provided with two bus transceiver interfaces.

[0018] Figure 2 This is a schematic diagram of an audio bus system provided in an embodiment of this application, where the master node and each slave node are provided with three bus transceiver interfaces.

[0019] Figure 3 This is a flowchart illustrating an audio bus connection method provided in an embodiment of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1: In one exemplary embodiment, an audio bus system is provided, including a master node and a plurality of slave nodes.

[0023] The master node and several slave nodes are connected in a daisy chain topology.

[0024] The master node and each of the slave nodes are provided with at least two bus transceiver interfaces.

[0025] The second bus transceiver interface of the master node is connected to one bus transceiver interface of the first slave node, forming the main link.

[0026] The first bus transceiver interface of the master node is connected to a bus transceiver interface of the first slave node, forming an auxiliary link.

[0027] Starting from the second slave node, each subsequent slave node connects one bus transceiver interface to one bus transceiver interface of the previous slave node.

[0028] The master node is connected to the controller, and the slave nodes are respectively connected to audio devices.

[0029] The controller is used for: When the audio data transmission load is no greater than a preset threshold, control only the main link to run; When the audio data transmission load exceeds a preset threshold, the main link and the auxiliary link are controlled to run simultaneously.

[0030] The auxiliary link is clock-synchronized with the main link. The auxiliary link is an optional redundant link whose operation is dynamically configured based on audio data transmission load requirements.

[0031] like Figure 1 As shown (where M represents the master node, S1 and S2 represent slave nodes, and P1 and P2 represent the first bus transceiver interface and the second bus transceiver interface, respectively), when both the master node and each slave node are equipped with two bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node, forming the main link.

[0032] The first bus transceiver interface of the master node is connected to the second bus transceiver interface of the first slave node, forming an auxiliary link.

[0033] Starting from the second slave node, the first bus transceiver interface of each subsequent slave node is connected to the second bus transceiver interface of the previous slave node.

[0034] like Figure 2 As shown (where M represents the master node, S1 and S2 represent slave nodes, and P1, P2, and P3 represent the first bus transceiver interface, the second bus transceiver interface, and the third bus transceiver interface, respectively), when the master node and each slave node are equipped with three bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node, forming the main link.

[0035] The third bus transceiver interface of the master node is connected to the third bus transceiver interface of the first slave node, forming an auxiliary link.

[0036] Starting from the second slave node, the first bus transceiver interface of each subsequent slave node is connected to the second bus transceiver interface of the previous slave node.

[0037] Specifically, the controller is used for: When the audio data traffic load is not greater than the first preset threshold, or the bandwidth usage is not greater than the second preset threshold, the control will only run the main link; When the audio data traffic load exceeds a first preset threshold, or the bandwidth usage exceeds a second preset threshold, the main link and the auxiliary link are controlled to run simultaneously.

[0038] In addition, each of the slave nodes includes: a clock recovery circuit; the slave node recovers the clock using the signal sent by the master node or the upstream slave node; the clock serves as: the working clock of this slave node; the receiving clock of the auxiliary link; and the transmitting clock of the bus transceiver interface of this slave node.

[0039] Compared with existing technologies, this embodiment has the following advantages: ① No increase in the number of nodes is required; only one cable needs to be added to establish an auxiliary link, and the auxiliary link can be flexibly configured according to the actual application.

[0040] ② It has a simple structure, low cost, and is easy to install and maintain.

[0041] ③ It can meet the sudden high-load operation requirements of the system and ensure the stability of audio data transmission.

[0042] Example 2: In one exemplary embodiment, an audio bus system is provided, comprising: The master node and multiple slave nodes are connected in a daisy chain topology, and each node has multiple bus transceiver interfaces.

[0043] The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node as the main link, and the first bus transceiver interface of the master node is connected to the second bus transceiver interface of the first slave node as the auxiliary link.

[0044] The second bus transceiver interface of the first slave node is connected to the first bus transceiver interface of the second slave node, and so on.

[0045] The master node connects to the controller, and multiple slave nodes connect to different audio devices.

[0046] The main link is always running. The operation of auxiliary links is configured via the controller, including: When the transmitted audio data traffic is normal and the system is running normally, the controller is configured not to run the auxiliary link; When the transmitted audio data traffic is too large and the system is under heavy load, the controller is configured to run the auxiliary link.

[0047] Furthermore, the primary and secondary links need to be clock-synchronized.

[0048] Example 3: In one exemplary embodiment, an audio bus system is provided, comprising: The master node and multiple slave nodes are connected in a daisy chain topology, and each node has multiple bus transceiver interfaces.

[0049] The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node as the main link, and the third bus transceiver interface of the master node is connected to the third bus transceiver interface of the first slave node as the auxiliary link.

[0050] The second bus transceiver interface of the first slave node is connected to the first bus transceiver interface of the second slave node, and so on.

[0051] The master node connects to the controller, and each slave node connects to a different audio device.

[0052] When the transmitted audio data traffic is normal and the system is running normally, the controller is configured to run only the main link and not the auxiliary link. When the transmitted audio data traffic is too large and the system is under heavy load, the controller is configured to run the main link and the auxiliary link simultaneously.

[0053] Furthermore, the primary and secondary links need to be clock-synchronized.

[0054] Example 4: In one exemplary embodiment, such as Figure 3 As shown, an audio bus connection method is provided, including: S1. Connect the second bus transceiver interface of the master node to one bus transceiver interface of the first slave node to form a main link; the master node and several slave nodes are connected in a daisy chain topology; the master node and each of the slave nodes are provided with at least two bus transceiver interfaces.

[0055] S2. Connect the first bus transceiver interface of the master node to a bus transceiver interface of the first slave node to form an auxiliary link.

[0056] S3. Starting from the second slave node, connect one bus transceiver interface of each subsequent slave node to one bus transceiver interface of the previous slave node.

[0057] S4. Connect the master node to the controller.

[0058] S5. Connect the several slave nodes to the audio device respectively.

[0059] S6. Using the controller, the activation and deactivation of the auxiliary link are controlled based on whether the audio data transmission load exceeds a preset threshold.

[0060] Where both the master node and each slave node are provided with two bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node to form the main link.

[0061] The first bus transceiver interface of the master node is connected to the second bus transceiver interface of the first slave node to form an auxiliary link.

[0062] Starting from the second slave node, connect the first bus transceiver interface of each subsequent slave node to the second bus transceiver interface of the previous slave node.

[0063] When the master node and each of the slave nodes are equipped with three bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node to form the main link.

[0064] The third bus transceiver interface of the master node is connected to the third bus transceiver interface of the first slave node to form an auxiliary link.

[0065] Starting from the second slave node, connect the first bus transceiver interface of each subsequent slave node to the second bus transceiver interface of the previous slave node.

[0066] Furthermore, the method of using a controller to control the activation and deactivation of the auxiliary link based on whether the audio data transmission load exceeds a preset threshold specifically includes: Using the controller, when the audio data traffic load is no greater than a first preset threshold, or the bandwidth usage is no greater than a second preset threshold, the controller will control only the main link to run. Using a controller, when the audio data traffic load exceeds a first preset threshold, or the bandwidth usage exceeds a second preset threshold, the main link and the auxiliary link are operated simultaneously.

[0067] Example 5: In one exemplary embodiment, an audio bus connection method is provided, comprising: The master node connects to the controller, and multiple slave nodes connect to different audio devices. The master node and multiple slave nodes are connected in a daisy chain topology.

[0068] The master node's second bus transceiver interface is connected to the first slave node's first bus transceiver interface via the master link.

[0069] The first bus transceiver interface of the master node and the second bus transceiver interface of the first slave node are connected using an auxiliary link.

[0070] The second bus transceiver interface of the first slave node is connected to the first bus transceiver interface of the second slave node, and so on.

[0071] The main link is always running. The operation of auxiliary links is configured via the controller, including: When the transmitted audio data traffic is normal and the bandwidth usage is low, the controller is configured not to run the auxiliary link.

[0072] When the transmitted audio data traffic is too large and the bandwidth usage is too high, the controller is configured to run an auxiliary link.

[0073] Furthermore, the primary and secondary links need to be clock-synchronized.

[0074] Example 6: In one exemplary embodiment, an audio bus connection method is provided, comprising: The master node connects to the controller, and multiple slave nodes connect to different audio devices. The master node and multiple slave nodes are connected in a daisy chain topology.

[0075] The master node's second bus transceiver interface is connected to the first slave node's first bus transceiver interface via the master link.

[0076] Use an auxiliary link to connect the third bus transceiver interface of the master node to the third bus transceiver interface of the first slave node.

[0077] The second bus transceiver interface of the first slave node is connected to the first bus transceiver interface of the second slave node, and so on.

[0078] The main link is always running. The operation of auxiliary links is configured via the controller, including: When the transmitted audio data traffic is normal and the bandwidth usage is low, the controller is configured not to run the auxiliary link.

[0079] When the transmitted audio data traffic is too large and the bandwidth usage is too high, the controller is configured to run an auxiliary link.

[0080] Furthermore, the primary and secondary links need to be clock-synchronized.

[0081] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0082] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An audio bus system, characterized in that, include: One master node and several slave nodes; The master node and several slave nodes are connected in a daisy-chain topology. The master node and each of the slave nodes are provided with at least two bus transceiver interfaces; The second bus transceiver interface of the master node is connected to a bus transceiver interface of the first slave node to form a main link; The first bus transceiver interface of the master node is connected to a bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, each subsequent slave node connects one bus transceiver interface to one bus transceiver interface of the previous slave node; The master node is connected to the controller, and the slave nodes are respectively connected to audio devices; The controller is used for: When the audio data transmission load is no greater than a preset threshold, control only the main link to run; When the audio data transmission load exceeds a preset threshold, the main link and the auxiliary link are controlled to run simultaneously.

2. The audio bus system according to claim 1, characterized in that, The auxiliary link is clock-synchronized with the main link.

3. The audio bus system according to claim 1, characterized in that, When both the master node and each slave node are equipped with two bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node to form a main link; The first bus transceiver interface of the master node is connected to the second bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, the first bus transceiver interface of each subsequent slave node is connected to the second bus transceiver interface of the previous slave node.

4. The audio bus system according to claim 1, characterized in that, When the master node and each of the slave nodes are equipped with three bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node to form a main link; The third bus transceiver interface of the master node is connected to the third bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, the first bus transceiver interface of each subsequent slave node is connected to the second bus transceiver interface of the previous slave node.

5. The audio bus system according to claim 1, characterized in that, The controller is specifically used for: When the audio data traffic load is not greater than the first preset threshold, or the bandwidth usage is not greater than the second preset threshold, the control will only run the main link; When the audio data traffic load exceeds a first preset threshold, or the bandwidth usage exceeds a second preset threshold, the main link and the auxiliary link are controlled to run simultaneously.

6. The audio bus system according to claim 1, characterized in that, The auxiliary link is an optional redundant link that is dynamically configured to operate based on the audio data transmission load requirements.

7. The audio bus system according to claim 1, characterized in that, Each of the slave nodes includes: a clock recovery circuit; the slave node recovers the clock using a signal sent by the master node or an upstream slave node; The clock serves as: The working clock of this slave node; The receiving clock of the auxiliary link; The transmit clock of the bus transceiver interface of this slave node.

8. An audio bus connection method, characterized in that, include: The second bus transceiver interface of the master node is connected to one bus transceiver interface of the first slave node to form a main link; the master node and several slave nodes are connected in a daisy chain topology; the master node and each of the slave nodes are provided with at least two bus transceiver interfaces. The first bus transceiver interface of the master node is connected to a bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, connect one bus transceiver interface of each subsequent slave node to one bus transceiver interface of the previous slave node; Connect the master node to the controller; Connect several of the slave nodes to audio devices respectively; The controller enables or disables the auxiliary link based on whether the audio data transmission load exceeds a preset threshold.

9. The audio bus connection method according to claim 8, characterized in that, When both the master node and each slave node are equipped with two bus transceiver interfaces: The second bus transceiver interface of the master node is connected to the first bus transceiver interface of the first slave node to form a main link; The first bus transceiver interface of the master node is connected to the second bus transceiver interface of the first slave node to form an auxiliary link; Starting from the second slave node, connect the first bus transceiver interface of each subsequent slave node to the second bus transceiver interface of the previous slave node.

10. The audio bus connection method according to claim 8, characterized in that, The method of using a controller to control the activation and deactivation of the auxiliary link based on whether the audio data transmission load exceeds a preset threshold specifically includes: Using the controller, when the audio data traffic load is no greater than a first preset threshold, or the bandwidth usage is no greater than a second preset threshold, the controller will control the operation to run only the main link; Using a controller, when the audio data traffic load exceeds a first preset threshold, or the bandwidth usage exceeds a second preset threshold, the main link and the auxiliary link are operated simultaneously.

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