Audio control system

Abstract

The utility model discloses an audio control system which comprises a plurality of wireless audio input devices, an audio encoding and decoding device and an audio processing device. The audio encoding and decoding equipment comprises at least two audio encoders and decoders; the plurality of wireless audio input devices are wirelessly connected with the audio encoding and decoding device and are used for transmitting audio signals to corresponding audio encoders and decoders in the audio encoding and decoding device; the number of the plurality of wireless audio input devices is twice that of the at least two audio codec, and one audio codec is connected with the two wireless audio input devices; the audio coding and decoding equipment is connected with the audio processing equipment through a first I2S bus, and each audio coding and decoding device in the audio coding and decoding equipment is used for carrying out sound mixing processing on audio signals transmitted by the corresponding wireless audio input equipment and then transmitting the audio signals to the audio processing equipment through the first I2S bus; and the audio processing equipment is connected with the audio encoding and decoding equipment through an I2C bus and is used for controlling each audio encoding and decoding device.

Description

Technical Field

[0001] The present application relates to the field of audio processing, and in particular to an audio control system. Background Art

[0002] In complex scenarios such as multi-person live broadcasts and large-scale conferences, efficient processing and transmission of audio signals are key to ensuring the smooth progress of activities. Traditional audio processing systems often use a single audio codec to receive and process signals from audio input devices for storage, transmission, and playback. This audio processing system exposes a series of structural defects when faced with multi-channel wireless audio input. Specifically, a single audio codec is subject to wireless bandwidth limitations, cost considerations, and its own design limitations, and can only support a limited number of wireless audio input devices, such as wireless microphones. This obviously cannot meet the high-density audio input requirements of multiple people. In addition, when processing multi-channel audio signals, traditional audio processing systems often lack an effective communication architecture to ensure the timely transmission of audio signals.

[0003] Therefore, there is an urgent need for a device or system that can break the input quantity limit of wireless audio input devices and has a corresponding communication architecture. Utility Model Content

[0004] The utility model provides an audio control system to at least solve the technical problem in the prior art that a device or system is urgently needed that can break the input quantity limitation of wireless audio input devices and has a corresponding communication architecture.

[0005] The present application provides an audio control system, comprising: multiple wireless audio input devices, an audio codec device, and an audio processing device; the audio codec device comprises at least two audio codecs; the multiple wireless audio input devices are wirelessly connected to the audio codec device for transmitting audio signals to corresponding audio codecs in the audio codec device; the number of the multiple wireless audio input devices is twice the number of the at least two audio codecs, and one audio codec is connected to two wireless audio input devices; the audio codec device is connected to the audio processing device via a first I2S bus, and each audio codec in the audio codec device is configured to mix and process a digital audio signal transmitted by a corresponding wireless audio input device and then transmit the mixed signal to the audio processing device via the first I2S bus; the audio processing device is further connected to the audio codec device via an I2C bus for controlling each audio codec in the audio codec device.

[0006] Optionally, the audio codecs in the audio codec device are connected in parallel, and each audio codec is connected to the audio processing device via a first I2S bus.

[0007] Optionally, the audio processing device includes a mixer and an application processor; wherein the mixer is connected to the application processor via a second I2S bus, and is used to mix the digital audio signals transmitted by each audio codec in the audio codec device and then transmit them to the application processor via the second I2S bus; the application processor is connected to the audio codec device via an I2C bus, and is used to control each audio codec in the audio codec device via the I2C bus.

[0008] Optionally, the audio processing device further includes an AI noise reduction module arranged between the mixer and the application processor, for performing noise reduction processing on the digital audio signal transmitted by the mixer, and transmitting the digital audio signal after noise reduction processing to the application processor through the second I2S bus.

[0009] Optionally, each audio codec includes a first wireless transceiver module, a first mixing module and an audio output interface; wherein the first wireless transceiver module is used to receive digital audio signals transmitted by the corresponding two wireless audio input devices, and send the digital audio signals to the first mixing module; the first mixing module is used to mix the digital audio of the corresponding two wireless audio input devices, and transmit the mixed digital audio signals to the audio processing device through the first I2S bus via the audio output interface.

[0010] Optionally, the audio codecs in the audio codec device are cascaded, the audio codecs are connected via audio lines, and the audio codec at the end is connected to the audio processing device via an I2S bus.

[0011] Optionally, each audio codec includes a second wireless receiving module, a first analog-to-digital conversion module, a second mixing module, and a first digital-to-analog conversion module, wherein the second wireless receiving module is used to transmit digital audio signals received from the corresponding two wireless audio input devices to the second mixing module; the first analog-to-digital conversion module is used to convert the analog audio signal output by the previous audio codec into a digital audio signal and transmit the digital audio signal to the second mixing module; the second mixing module is used to mix the digital audio signal transmitted by the wireless receiving module and the digital audio signal transmitted by the analog-to-digital conversion module and transmit the digital audio signal to the first digital-to-analog conversion module;

[0012] The first digital-to-analog conversion module is used to convert the mixed digital audio signal into an analog audio signal and transmit it to the next audio codec or the audio processing device.

[0013] Optionally, the audio codecs in the audio codec device are cascaded, and two audio codecs and each audio codec and the audio processing device are connected via an I2S bus.

[0014] Optionally, each audio codec includes an I2S interface and a third mixing module; wherein the I2S interface includes an input port and an output port; the third mixing module is used to mix the digital audio signals received from the corresponding two wireless audio input devices and the digital audio signals transmitted from the input port and then transmit them to the output port; the output port is used to transmit the digital audio signal transmitted by the third mixing module to the next audio codec or the audio processing device; the input port of the audio codec located at the head is used to receive the digital audio signal transmitted by the audio processing device, and the input ports of other audio codecs other than the audio codec located at the head are used to receive the digital audio signal transmitted by the previous audio codec and send it to the corresponding third mixing module.

[0015] Optionally, the audio codec located at the head also includes a second analog-to-digital conversion module and a second digital-to-analog conversion module, wherein the second analog-to-digital conversion module is used to convert the analog audio signal transmitted by the external audio device and / or the built-in audio input device into a digital audio signal and send it to the corresponding third mixing module; the second digital-to-analog conversion module is used to convert the digital audio signal transmitted by the audio processing device into an analog audio signal and output it to the outside.

[0016] In an embodiment of the present application, by increasing the number of audio codecs and pairing them with multiple wireless audio input devices, the system can process more channels of audio signals at the same time, greatly improving the concurrent processing capability of the system and meeting the high-density audio input requirements of multiple people. In addition, by introducing the I2S bus and the I2C bus as communication media, each audio codec can transmit audio data to the audio processing device via the I2S bus, ensuring the high quality and real-time performance of the audio signal. At the same time, the audio processing device can transmit control signals to each audio codec via the I2C bus, thereby achieving effective control of multiple audio codecs. Thus, this technical solution not only breaks the input quantity limit of wireless audio input devices, but also provides a corresponding communication architecture based on the I2S bus and the I2C bus. This solves the technical problem in the prior art of urgently needing a device or system that can break the input quantity limit of wireless audio input devices while having a corresponding communication architecture.

[0017] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, some specific embodiments of the present application will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0019] Figure 1 This is a schematic diagram of an audio control system according to an embodiment of the present application;

[0020] Figure 2 is another schematic diagram of the audio control system according to an embodiment of the present application;

[0021] Figure 3 is another schematic diagram of the audio control system according to an embodiment of the present application;

[0022] Figure 4 is another schematic diagram of the audio control system according to an embodiment of the present application;

[0023] Figure 5 is another schematic diagram of the audio control system according to an embodiment of the present application;

[0024] Figure 6 is another schematic diagram of the audio control system according to an embodiment of the present application;

[0025] Figure 7 is another schematic diagram of the audio control system according to an embodiment of the present application; and

[0026] Figure 8 This is another example of the audio control system of the embodiment of the present application. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the embodiments of the present invention described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] The present application provides an audio control system, comprising: multiple wireless audio input devices, an audio codec device, and an audio processing device; the audio codec device comprises at least two audio codecs; wherein the multiple wireless audio input devices are wirelessly connected to the audio codec device for transmitting audio signals to corresponding audio codecs in the audio codec device; the number of the multiple wireless audio input devices is twice the number of the at least two audio codecs, and one audio codec is connected to two wireless audio input devices; the audio codec device is connected to the audio processing device via a first I2S bus, and each audio codec in the audio codec device is configured to mix and process a digital audio signal transmitted by a corresponding wireless audio input device and then transmit the mixed audio signal to the audio processing device via the first I2S bus; the audio processing device is further connected to the audio codec device via an I2C bus for controlling each audio codec in the audio codec device.

[0032] Specifically, Figure 1 A schematic diagram of the audio control system according to an embodiment of the present application is shown as an example. Figure 1As shown, the audio control system includes six wireless audio input devices 11a, 11b, 12a, 12b, 13a, and 13b, an audio codec device 20, and an audio processing device 30. Furthermore, the audio codec device 20 is connected to the audio processing device 30 via a first I2S bus, and the audio processing device 30 is connected to the audio codec device 20 via an I2C bus. The audio codec device 20 includes, for example but not limited to, three audio codecs 21, 22, and 23. The audio codec 21 is connected to the wireless audio input devices 11a and 11b, the audio codec 22 is connected to the wireless audio input devices 12a and 12b, and the audio codec 23 is connected to the wireless audio input devices 13a and 13b.

[0033] The wireless audio input devices 11a and 11b are used to transmit the first and second digital audio signals to the audio codec 21, which performs mixing processing (i.e., sound mixing) on ​​the two received digital audio signals. The wireless audio input devices 12a and 12b are used to transmit the third and fourth digital audio signals to the audio codec 22, which performs mixing processing on the two received digital audio signals. The wireless audio input devices 13a and 13b are used to transmit the fifth and sixth digital audio signals to the audio codec 23, which performs mixing processing on the two received digital audio signals. The audio codec device 20 then transmits the processed digital audio signals to the audio processing device 30 via the first I2S bus. The audio processing device 30 can also control the three audio codecs 21, 22, and 23 in the audio codec device 20 via the I2C bus. The control method is to send a control signal to each audio codec 21, 22 and 23 via the I2C bus, and the specific content of the control signal is defined according to the application scenario.

[0034] As described in the background technology, in complex scenarios such as multi-person live broadcasts and large-scale conferences, efficient processing and transmission of audio signals are key to ensuring the smooth progress of activities. Traditional audio processing systems often use a single audio codec to receive and process signals from audio input devices for the purpose of storage, transmission and playback. This audio processing system exposes a series of structural defects when faced with multi-channel wireless audio input. Specifically, a single audio codec is subject to wireless bandwidth limitations, cost considerations and its own design limitations, and can only support a limited number of wireless audio input devices, such as wireless microphones, which obviously cannot meet the high-density audio input requirements of multiple people. In addition, when processing multi-channel audio signals, traditional audio processing systems often lack an effective communication architecture to ensure the timely transmission of audio signals.

[0035] In response to the technical problems mentioned above, the present technical solution increases the number of audio codecs and pairs them with multiple wireless audio input devices, so that the system can process more audio signals at the same time, greatly improving the concurrent processing capability of the system and meeting the high-density audio input requirements of multiple people. In addition, the I2S bus and the I2C bus are introduced as communication media, and each audio codec can transmit audio data to the audio processing device through the I2S bus, ensuring the high quality and real-time performance of the audio signal. At the same time, the audio processing device can transmit control signals to each audio codec through the I2C bus, thereby realizing the effective control of multiple audio codecs. Therefore, the present technical solution not only breaks the input quantity limit of wireless audio input devices, but also provides a corresponding communication architecture based on the I2S bus and the I2C bus. This solves the technical problem in the prior art of urgently needing a device or system that can break the input quantity limit of wireless audio input devices while having a corresponding communication architecture.

[0036] It should be noted that one of the core aspects of this technical solution is to provide a communication architecture that meets the high-density audio input requirements of multiple people, rather than a specific control method. The corresponding control process can adopt an existing solution that can control the audio encoder.

[0037] Optionally, the audio codecs in the audio codec device are connected in parallel, and each audio codec is connected to the audio processing device via a first I2S bus.

[0038] Specifically, refer to Figure 2 As shown, audio codecs 21, 22 and 23 are connected in parallel, and each audio codec is connected to an audio processing device 30 via a first I2S bus. By connecting multiple audio codecs that can only connect to two wireless audio input devices in parallel, the audio signal processing system can connect to more than two wireless audio input devices. And each of the parallel audio codecs transmits the digital audio signal to the audio processing device 30 via the corresponding I2S bus, and the audio processing device 30 performs integrated processing. Thus, the I2S bus enables the audio codec to transmit the processed audio signal to the audio mixing device efficiently and with low latency, ensuring the integrity and real-time performance of the audio signal, and making the sound quality of each audio channel consistent and synchronized. This technical solution utilizes multiple wireless audio input devices, the parallel connection of audio codecs and the integrated processing of audio mixing devices to achieve the access and processing of multiple wireless audio input devices, and can ensure the consistent and synchronized sound quality of each audio channel.

[0039] Optionally, the audio processing device includes a mixer and an application processor; wherein the mixer is connected to the application processor via a second I2S bus, and is used to mix the digital audio signals transmitted by each audio codec in the audio codec device and then transmit them to the application processor via the second I2S bus; the application processor is connected to the audio codec device via an I2C bus, and is used to control each audio codec in the audio codec device via the I2C bus.

[0040] Specifically, refer to Figure 3 As shown, the audio processing device 30 includes a mixer 31 and an application processor 32. The mixer 31 is connected to the application processor 32 via a second I2S bus. The mixer 31 can mix and process the digital audio signals transmitted by the various audio codecs in the audio codec device 20 and transmit them to the application processor 32 via the second I2S bus. The application processor 32 is connected to the audio codec device 20 via an I2C bus and can control the various audio codecs in the audio codec device 20 via the I2C bus. In this way, the audio processing device 30 can not only realize the integrated processing of digital audio signals, but also uniformly control the various audio codecs in the audio codec device 20.

[0041] Optionally, the audio processing device also includes an AI noise reduction module arranged between the mixer and the application processor, for performing noise reduction processing on the digital audio signal transmitted by the mixer, and transmitting the noise-reduced audio signal to the application processor through the second I2S bus.

[0042] Specifically, refer to Figure 4 As shown, the audio processing device 30 also includes an AI noise reduction module 33 provided between the mixer 31 and the application processor 32. The AI ​​noise reduction module 33 is used to perform noise reduction processing on the digital audio signal transmitted by the mixer 31, and transmit the digital audio signal after noise reduction processing to the application processor 32 through the second I2S bus. In this way, the noise in the audio signal can be effectively reduced and the audio quality can be improved. In addition, the digital audio signal processed by the mixer 31 can also be transmitted directly to the application processor 32 through a bypass without passing through the AI ​​noise reduction module 32.

[0043] Optionally, each audio codec includes a first wireless transceiver module, a first mixing module and an audio output interface; wherein the first wireless transceiver module is used to receive digital audio signals transmitted by the corresponding two wireless audio input devices and send the digital audio signals to the first mixing module; the first mixing module is used to mix the digital audio signals of the corresponding two wireless audio input devices, and transmit the mixed digital audio signals to the audio processing device through the first I2S bus through the audio output interface.

[0044] Specifically, refer to Figure 5 As shown, the audio codec 21 includes a first wireless transceiver module 211, a first audio mixing module 212, and an audio output interface 213. The audio codec 22 includes a first wireless transceiver module 221, a first audio mixing module 222, and an audio output interface 223. The audio codec 23 includes a first wireless transceiver module 231, a first audio mixing module 232, and an audio output interface 233. The first audio mixing module 212, the first audio mixing module 222, and the first audio mixing module 232 can be, for example, a digital signal processor (DSP chip).

[0045] Taking the audio codec 21 as an example, the wireless audio input devices 11a and 11b transmit the first and second digital audio signals to the first wireless transceiver module 211 in the audio codec 21. The first wireless transceiver module 211 transmits the two digital audio signals to the first mixing module 212. The first mixing module 212 mixes the two digital audio signals, generates a corresponding mixed audio signal, and transmits it to the audio processing device 30 via the audio output interface 213 and the I2S bus.

[0046] In this way, each audio codec can independently process the two digital audio signals it receives, and then transmit them to the audio processing device 30 for integrated processing, which can reduce the workload of the audio processing device 30. In addition, receiving digital audio signals transmitted by multiple wireless audio input devices through the wireless transceiver module can simplify device deployment, reduce dependence on physical wiring, and effectively reduce the complexity and cost of device deployment.

[0047] Optionally, the audio codecs in the audio codec device are cascaded, the audio codecs are connected via audio lines, and the audio codec at the end is connected to the audio processing device via an I2S bus.

[0048] Specifically, refer to Figure 6 As shown, audio codecs 21, 22, and 23 in audio codec device 20 are cascaded. Audio codecs 21 and 22 are connected via an audio cable, and audio codecs 22 and 23 are connected via an audio cable. Audio codec 23, located at the end, is connected to audio processing device 30 via an I2S bus. Furthermore, analog audio signals are transmitted between audio codecs 21 and 22, and between audio codecs 22 and 23. By cascading multiple audio codecs that are only capable of connecting to two wireless audio input devices, the audio control system can connect to more than two wireless audio input devices.

[0049] Optionally, each audio codec includes a second wireless receiving module, a first analog-to-digital conversion module, a second mixing module and a first digital-to-analog conversion module, wherein the second wireless receiving module is used to transmit the digital audio signal received from the corresponding two wireless audio input devices to the second mixing module; the first analog-to-digital conversion module is used to convert the analog audio signal output by the previous audio codec into a digital audio signal and transmit it to the second mixing module; the second mixing module is used to mix the digital audio signal transmitted by the wireless receiving module and the digital audio signal transmitted by the analog-to-digital conversion module and transmit them to the first digital-to-analog conversion module; the first digital-to-analog conversion module is used to convert the mixed digital audio signal into an analog audio signal and transmit it to the next audio codec or the audio processing device.

[0050] Specifically, refer to Figure 7 As shown, the audio codec 21 includes a second wireless receiving module 214, a first analog-to-digital conversion module 215, a second mixing module 216, and a first digital-to-analog conversion module 217. The audio codec 22 includes a second wireless receiving module 224, a first analog-to-digital conversion module 225, a second mixing module 226, and a first digital-to-analog conversion module 227. The audio codec 23 includes a second wireless receiving module 234, a first analog-to-digital conversion module 235, a second mixing module 236, and a first digital-to-analog conversion module 237. The second wireless receiving modules 214, 224, and 234 are configured to receive digital audio signals transmitted by corresponding wireless audio input devices and transmit them to the corresponding second mixing modules. The analog-to-digital conversion modules 215, 225, and 235 are configured to convert analog signals into digital signals. The second mixing modules 216, 226, and 236 are configured to perform mixing processing on the received digital audio signals. The first digital-to-analog conversion modules 217, 227, and 237 are configured to convert digital audio signals into analog audio signals.

[0051] More specifically, the audio codec 21 receives digital audio signals transmitted by the wireless audio input devices 11a and 11b via the second wireless transceiver module 214 and transmits them to the second mixing module 216. The second mixing module 216 then mixes the digital audio signals to generate a first mixed audio signal. The first mixed audio signal is a digital signal. The second mixing module 216 then transmits the first mixed audio signal to the first digital-to-analog conversion module 217. The first digital-to-analog conversion module 217 converts the first mixed audio signal into an analog audio signal and transmits the analog audio signal to the audio codec 22.

[0052] Furthermore, the audio codec 22 receives an analog audio signal corresponding to the first mixed audio signal and converts the analog audio signal into a digital audio signal via the first analog-to-digital conversion module 225. The audio codec 22 then sends the digital audio signal transmitted by the wireless audio input devices 12a and 12b, received via the second wireless transceiver module 224, to the second mixing module 226. The second mixing module 226 mixes the digital audio signal with the digital audio signal corresponding to the first mixed audio signal to generate a second mixed audio signal. The second mixed audio signal is a digital signal. The second mixing module 226 then transmits the second mixed audio signal to the first digital-to-analog conversion module 227. The first digital-to-analog conversion module 227 converts the second mixed audio signal into an analog audio signal and transmits the analog audio signal to the audio codec 23.

[0053] Furthermore, the audio codec 23 receives an analog audio signal corresponding to the second mixed audio signal and converts the analog audio signal into a digital audio signal via the first analog-to-digital conversion module 235. The audio codec 23 then sends the digital audio signal transmitted by the wireless audio input devices 13a and 13b, received via the second wireless transceiver module 234, to the second mixing module 236. The second mixing module 236 mixes the digital audio signal with the digital audio signal corresponding to the second mixed audio signal to generate a third mixed audio signal. The third mixed audio signal is a digital signal. The second mixing module 236 then transmits the third mixed audio signal to the first digital-to-analog conversion module 237. The first digital-to-analog conversion module 237 converts the third mixed audio signal into an analog audio signal and transmits the analog audio signal as an output signal to the audio processing device 30 via the first I2S bus.

[0054] Therefore, this technical solution treats each audio codec as an independent processing unit, which independently completes signal conversion and preliminary processing through the internal analog-to-digital conversion module and digital-to-analog conversion module, and then connects to other codecs through audio cables, thereby enhancing the modularity of the system and facilitating system expansion and maintenance.

[0055] Optionally, the audio codecs in the audio codec device are cascaded, and two audio codecs and each audio codec and the audio processing device are connected via an I2S bus.

[0056] Specifically, refer to Figure 8As shown, the audio codecs 21 and 22, and the audio codecs 22 and 23 are connected via the I2S bus, and the audio codec 21 and the audio processing device 30, the audio codec 22 and the audio processing device 30, and the audio codec 23 and the audio processing device 30 are also connected via the I2S bus.

[0057] Thus, by cascading multiple audio codecs that can only connect to two wireless audio input devices to ensure that the audio control system can connect to more than two wireless audio input devices, audio data can be transmitted between each audio codec through the I2S bus, and audio data can also be transmitted between each audio codec and the audio processing device 30 through the I2S bus. The I2S bus enables the current audio codec to transmit the processed audio signal to the next audio codec and / or audio processing device 30 efficiently and with low latency, ensuring the integrity and real-time performance of the audio signal, so that the sound quality of each audio channel is consistent and synchronized.

[0058] Optionally, each audio codec includes an I2S interface and a third mixing module; wherein the I2S interface includes an input port and an output port; the third mixing module is used to mix the digital audio signals received from the corresponding two wireless audio input devices and the digital audio signals transmitted from the input port and then transmit them to the output port; the output port is used to transmit the digital audio signal transmitted by the third mixing module to the next audio codec or the audio processing device; the input port of the audio codec located at the head is used to receive the digital audio signal transmitted by the audio processing device, and the input ports of other audio codecs other than the audio codec located at the head are used to receive the digital audio signal transmitted by the previous audio codec and send it to the corresponding third mixing module.

[0059] Specifically, refer to Figure 8 As shown, in an architecture in which multiple audio codecs that can only connect to two wireless audio input devices are cascaded, the audio codec 21 includes an I2S interface and a third mixing module 219, and the I2S interface includes an input port 218 and an output port 2110. The audio codec 22 includes an I2S interface and a third mixing module 229, and the I2S interface includes an input port 228 and an output port 2210. The audio codec 23 includes an I2S interface and a third mixing module 239, and the I2S interface includes an input port 238 and an output port 2310.

[0060] More specifically, the input port 218 of the audio codec 21 located at the head does not transmit the digital audio signal to the third mixing module 219. The third mixing module 219 mixes the digital audio signal received from the wireless audio input devices 11a and 11b and transmits it to the output port 2110. The digital audio signal transmitted by the third mixing module 219 is sent to the audio codec 22 through the output port 2110.

[0061] The audio codec 22 receives the digital audio signal transmitted by the audio codec 21 through the input port 228 and sends it to the third mixing module 229. The third mixing module 229 mixes the digital audio signal received from the wireless audio input devices 12a and 12b and the digital audio signal transmitted by the input port 228 and transmits them to the output port 2210. The digital audio signal transmitted by the third mixing module 229 is sent to the audio codec 23 through the output port 2210.

[0062] The audio codec 23 receives the digital audio signal transmitted by the audio codec 23 through the input port 238 and sends it to the third mixing module 239. The third mixing module 239 mixes the digital audio signal received from the wireless audio input devices 13a and 13b and the digital audio signal transmitted by the input port 238 and transmits them to the output port 2310. The digital audio signal transmitted by the third mixing module 239 is sent to the audio processing device 30 through the output port 2310.

[0063] When there is a need to output audio externally, the audio processing device 30 transmits the digital audio signal to the input port 218 of the audio codec 21 via the I2S bus, so that the digital audio signal is converted into an analog audio signal by the internal module of the audio codec 21 and then output externally.

[0064] In this way, the loss of audio signals during transmission is effectively reduced, the integrity and real-time performance of the audio signals are guaranteed, and the sound quality of each audio channel is consistent and synchronized.

[0065] Optionally, the audio codec located at the head also includes a second analog-to-digital conversion module and a second digital-to-analog conversion module, wherein the second analog-to-digital conversion module is used to convert the analog audio signal transmitted by the external audio device and / or the built-in audio input device into a digital audio signal and send it to the corresponding third mixing module; the second digital-to-analog conversion module is used to convert the digital audio signal transmitted by the audio processing device into an analog audio signal and output it to the outside.

[0066] Specifically, refer to Figure 8As shown, the audio codec 21 at the head also includes a second analog-to-digital conversion module 2111 and a second digital-to-analog conversion module 2112. The second analog-to-digital conversion module 2111 is used to convert analog audio signals transmitted by external audio devices and / or built-in audio input devices into digital audio signals and then send them to the corresponding third mixing module 219. The second digital-to-analog conversion module 2112 is used to convert digital audio signals transmitted by the audio processing device 30 into analog audio signals and then output them externally.

[0067] In this way, not only external audio devices are introduced, but also the analog audio signals of built-in audio input devices can be processed, which greatly enriches the input source types of the audio control system and meets the needs of diverse application scenarios.

[0068] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0069] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0070] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0071] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An audio control system, characterized in that: include: Multiple wireless audio input devices, audio codec devices, and audio processing devices; The audio codec device includes at least two audio codecs; in The multiple wireless audio input devices are wirelessly connected to the audio codec device, and are used to transmit audio signals to corresponding audio codecs in the audio codec device; the number of the multiple wireless audio input devices is twice the number of the at least two audio codecs, and one audio codec is connected to two wireless audio input devices; The audio codec device is connected to the audio processing device via a first I2S bus, and each audio codec in the audio codec device is used to mix the digital audio signal transmitted by the corresponding wireless audio input device and then transmit it to the audio processing device via the first I2S bus; The audio processing device is also connected to the audio codec device via an I2C bus, and is used to control each audio codec in the audio codec device.

2. The audio control system according to claim 1, characterized in that The audio codecs in the audio codec device are connected in parallel, and each audio codec is connected to the audio processing device via a first I2S bus.

3. The audio control system according to claim 2, characterized in that: The audio processing device includes a mixer and an application processor; wherein The mixer is connected to the application processor via a second I2S bus, and is used to mix the digital audio signals transmitted by the audio codecs in the audio codec device and then transmit them to the application processor via the second I2S bus; The application processor is connected to the audio codec device via an I2C bus, and is configured to control each audio codec in the audio codec device via the I2C bus.

4. The audio control system according to claim 3, characterized in that: The audio processing device also includes an AI noise reduction module arranged between the mixer and the application processor, which is used to perform noise reduction processing on the digital audio signal transmitted by the mixer and transmit the digital audio signal after noise reduction processing to the application processor through the second I2S bus.

5. The audio control system according to claim 2, characterized in that: Each audio codec includes a first wireless transceiver module, a first mixing module and an audio output interface; wherein The first wireless transceiver module is used to receive digital audio signals transmitted by two corresponding wireless audio input devices, and send the digital audio signals to the first mixing module; The first mixing module is used to mix the digital audios of the corresponding two wireless audio input devices, and transmit the mixed digital audio signals to the audio processing device through the first I2S bus via the audio output interface.

6. The audio control system according to claim 1, characterized in that The audio codecs in the audio codec device are cascaded, the audio codecs are connected via audio lines, and the audio codec at the end is connected to the audio processing device via an I2S bus.

7. The audio control system according to claim 6, characterized in that: Each audio codec includes a second wireless receiving module, a first analog-to-digital conversion module, a second mixing module and a first digital-to-analog conversion module, wherein The second wireless receiving module is used to transmit the digital audio signals received from the corresponding two wireless audio input devices to the second mixing module; The first analog-to-digital conversion module is used to convert the analog audio signal output by the previous audio codec into a digital audio signal and transmit it to the second mixing module; The second audio mixing module is used to mix the digital audio signal transmitted by the wireless receiving module and the digital audio signal transmitted by the analog-to-digital conversion module and then transmit the mixed audio signal to the first digital-to-analog conversion module; The first digital-to-analog conversion module is used to convert the mixed digital audio signal into an analog audio signal and transmit it to the next audio codec or the audio processing device.

8. The audio control system according to claim 1, characterized in that The audio codecs in the audio codec device are cascaded, and two audio codecs and each audio codec and the audio processing device are connected via an I2S bus.

9. The audio control system according to claim 8, characterized in that: Each audio codec includes an I2S interface and a third mixing module; wherein the I2S interface includes an input port and an output port; The third audio mixing module is used to mix the digital audio signals received from the corresponding two wireless audio input devices and the digital audio signal transmitted from the input port and then transmit them to the output port; The output port is used to transmit the digital audio signal transmitted by the third mixing module to the next audio codec or the audio processing device; The input port of the audio codec located at the head is used to receive the digital audio signal transmitted by the audio processing device, and the input ports of other audio codecs other than the audio codec located at the head are used to receive the digital audio signal transmitted by the previous audio codec and send it to the corresponding third mixing module.

10. The audio control system according to claim 9, characterized in that: The audio codec located at the head also includes a second analog-to-digital conversion module and a second digital-to-analog conversion module. The second analog-to-digital conversion module is used to convert the analog audio signal transmitted by the external audio device and / or the built-in audio input device into a digital audio signal and send it to the corresponding third mixing module; the second digital-to-analog conversion module is used to convert the digital audio signal transmitted by the audio processing device into an analog audio signal and output it to the outside.

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