Audio interaction host

Abstract

The utility model provides an audio interaction host, and relates to the technical field of audio equipment, the audio interaction host of one embodiment comprises a processor, and an analog audio signal input device, a digital audio signal input device and an audio output device which are in communication connection with the processor; the analog audio signal input equipment is used for acquiring analog audio signals, converting the acquired analog audio signals into first digital audio signals and outputting the first digital audio signals to the processor; the digital audio signal input device is used for obtaining a second digital audio signal and outputting the obtained second digital audio signal to the processor, and the processor is used for processing the accessed digital audio signal, obtaining a processed digital audio signal and outputting the obtained processed digital audio signal to the audio output device; and the audio output equipment is used for converting the received processed digital audio signal into an analog audio signal and outputting the analog audio signal. According to the scheme of the embodiment, the interaction performance of the audio interaction equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of audio equipment, in particular to an audio interaction host. BACKGROUND

[0002] At present, there are many occasions that require audio input and output of different types and sound sources to realize audio interaction. These possible occasions include but are not limited to classroom teaching, online teaching, etc. Based on this demand, an audio interaction host is usually used to realize the functions of audio input and output, so as to meet the demand for audio input and output in such scenarios. However, the existing audio interaction host is difficult to meet the demand of the above-mentioned interactive scenarios. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide an audio interaction host to improve the audio interaction performance in view of the above technical problems.

[0004] In a first aspect, the present application provides an audio interaction host, wherein the audio interaction host comprises: a processor, an analog audio signal input device, a digital audio signal input device and an audio output device which are in communication connection with the processor.

[0005] The analog audio signal input device is configured to collect analog audio signals and convert the collected analog audio signals into first digital audio signals, and then output the first digital audio signals to the processor.

[0006] The digital audio signal input device is configured to obtain second digital audio signals and output the obtained second digital audio signals to the processor.

[0007] The processor is configured to process the first digital audio signals or the second digital audio signals, obtain processed digital audio signals, and output the obtained processed digital audio signals to the audio output device.

[0008] The audio output device is configured to convert the received processed digital audio signals into analog audio signals and then output the analog audio signals.

[0009] Based on the audio interaction host provided in the embodiment, the analog audio signal input device and the digital audio signal input device are arranged at the same time, so that the analog audio signal can be collected and acquired, converted into a digital audio signal and given to the processor for processing, and the digital audio signal can be directly acquired and given to the processor for processing, and output through the audio output device after being processed by the processor, so that the analog audio signal or the digital audio signal or the analog audio signal and the digital audio signal can be accessed according to the actual scene requirements, the requirements of audio signal input and audio signal output can be met, and the interaction performance of the audio interaction device is improved.

[0010] In some embodiments, the digital audio signal input device comprises a digital microphone communication circuit and a network switching circuit, the digital microphone communication circuit is in communication connection with the processor through the network switching circuit, and the digital microphone communication circuit comprises cascaded digital microphones.

[0011] Based on the embodiment, the digital audio signal input device comprises a digital microphone communication circuit and a network switching circuit, the digital microphone communication circuit comprises cascaded digital microphones, the digital microphone collects and acquires a digital audio signal, and the digital audio signal is transmitted based on a network, so that the signal interference is reduced compared with the analog signal collection, and the anti-interference performance of the audio signal transmission is improved.

[0012] In some embodiments, the digital audio signal input device further comprises:

[0013] A network communication circuit connected with the network switching circuit.

[0014] Based on the embodiment, the audio interaction device is provided with the network communication circuit, can be in communication connection with devices on the network such as the upper computer or the recording and broadcasting machine through the network communication circuit based on the network, the communication connection of the devices on the network can be realized accordingly, and the parameters of the audio interaction host can be configured through the network on this basis.

[0015] In some embodiments, the cascaded digital microphones are connected through a daisy chain link, and / or the digital microphone is an omnidirectional sound beam microphone.

[0016] Based on the embodiment, the digital microphone can be connected through the daisy chain link, the connection structure is simple and easy to manage, a plurality of digital microphones can be connected by using limited connection lines, and the extension type is strong. The digital microphone adopts the omnidirectional sound beam microphone, the omnidirectional sound beam microphone can pick up sound omnidirectionally, has a digital signal processing function itself, and is transmitted based on a network, so that the anti-interference performance of the audio signal transmission can be further improved.

[0017] In some embodiments, the analog audio signal input device comprises:

[0018] at least two analog audio signal input interfaces and at least one analog-digital conversion device, the analog audio signal input interfaces being connected to the processor through the analog-digital conversion device.

[0019] Based on this embodiment, the analog audio signal input device comprises at least two analog audio signal input interfaces and at least one analog-digital conversion device, so that rich analog audio signal input interfaces can be provided to access one or more analog audio signals as needed, to meet the requirement of accessing multiple analog audio signals, and to further improve the richness of the audio interactive host.

[0020] In some embodiments, the analog audio signal input device comprises a wired microphone interface, the analog-digital conversion device comprises a first analog-digital conversion device, the first analog-digital conversion device comprises at least two analog-digital conversion chips cascaded through a TDM bus, and the wired microphone interface is connected to the processor through the first analog-digital conversion device.

[0021] Based on this embodiment, the analog audio signal input device comprises a wired microphone interface, and the first analog-digital conversion device connected to the wired microphone interface comprises at least two analog-digital conversion chips cascaded through a TDM bus, so that a wired microphone can be connected to access the analog audio signal collected and obtained by the wired microphone, and more ADC conversion channels can be implemented through the at least two analog-digital conversion chips cascaded through a TDM bus, on the basis of which more wired microphones can be accessed, and the richness of the audio interactive host is further improved.

[0022] In some embodiments, the analog audio signal input device comprises a linear audio input interface, a microphone audio input interface, a wireless audio receiver, and a differential audio input interface, the analog-digital conversion device comprises a second analog-digital conversion device and a third analog-digital conversion device, two of the linear audio input interface, the microphone audio input interface, the wireless audio receiver, and the differential audio input interface are connected to the processor through the second analog-digital conversion device, and the other two are connected to the processor through the third analog-digital conversion device.

[0023] Based on this embodiment, the analog audio signal input device can further include a linear audio input interface, a microphone audio input interface, a wireless audio receiver and a differential audio input interface, so that more types of analog audio signals can be accessed, and two of the interfaces are connected to the processor through the second analog-digital conversion device, and the other two interfaces are connected to the processor through the third analog-digital conversion device, so that the number of analog-digital conversion devices can be reduced, and the cost of the audio interactive device is reduced while the number of types of analog audio signals accessed is enriched.

[0024] In some embodiments, the analog audio signal input device includes a linear audio input interface and / or a microphone audio input interface, the analog-digital conversion device includes a second analog-digital conversion device, and the linear audio input interface and the microphone audio input interface are connected to the processor through the second analog-digital conversion device.

[0025] The analog audio signal input device includes a wireless audio receiver and / or a differential audio input interface, and the analog-digital conversion device includes a third analog-digital conversion device, and the wireless audio receiver and the differential audio input interface are connected to the processor through the third analog-digital conversion device.

[0026] Based on this embodiment, the linear audio input interface and the microphone audio input interface are connected to the processor through the second analog-digital conversion device, and the wireless audio receiver and the differential audio input interface are connected to the processor through the third analog-digital conversion device, so that the second analog-digital conversion device can be dedicated to analog-digital conversion of analog audio signals accessed through the linear audio input interface and the microphone audio input interface, and the third analog-digital conversion device can be dedicated to analog-digital conversion of analog audio signals accessed through the wireless audio receiver and the differential audio input interface, which is helpful for the application of the audio interactive host and further improves the richness and application reliability of the audio interactive host.

[0027] In some embodiments, the second analog-digital conversion device and the third analog-digital conversion device are analog-digital conversion chips.

[0028] Based on this embodiment, the analog-digital conversion device is implemented by using an analog-digital conversion chip, which has the characteristics of high integration, high precision, high speed and low power consumption, and can reduce the size and cost of the audio interactive host while maintaining high-performance analog-digital conversion.

[0029] In some embodiments, the audio output device includes at least one digital-analog conversion device connected to the processor, and an audio output interface connected to the digital-analog conversion device, the audio output interface including a differential audio output interface and at least one linear audio output interface.

[0030] Based on the embodiment, the audio output device can include a differential audio output interface and at least one linear audio output interface, and the analog audio signal obtained after digital-to-analog conversion by the digital-to-analog conversion device can be output through the differential audio output interface and the at least one linear audio output interface, thereby meeting different audio output requirements and further improving the richness of the audio interactive host.

[0031] In some embodiments, the audio output device includes a power amplifier output circuit connected to the processor.

[0032] Based on the embodiment, the audio output device can further include a power amplifier output circuit connected to the processor, so that the power amplifier circuit can be connected through the power amplifier output circuit for audio output, thereby meeting the requirement of outputting a power amplifier audio signal and further improving the richness of the audio interactive host.

[0033] In some embodiments, the audio output device includes a universal serial bus sound card circuit connected to the processor.

[0034] Based on the embodiment, the audio output device can further include a universal serial bus sound card circuit connected to the processor, so that an external audio playback device can be connected through the universal serial bus sound card circuit, thereby meeting the requirement of outputting an audio signal through the universal serial bus interface to connect an external audio playback device and further improving the richness of the audio interactive host.

[0035] In some embodiments, the digital-to-analog conversion device is a digital-to-analog conversion chip.

[0036] Based on the embodiment, the digital-to-analog conversion device is implemented by using a digital-to-analog conversion chip, which has the characteristics of high integration, high precision, high speed, and low power consumption, and can reduce the size and cost of the audio interactive host while maintaining high-performance digital-to-analog conversion.

[0037] In some embodiments, the audio interactive host further includes a power supply circuit connected to the processor, and a power supply control circuit connected to the power supply circuit, the power supply control circuit being further connected to the common terminal of the wired microphone interface and the first analog-to-digital conversion device, the digital microphone communication circuit, and the processor.

[0038] Based on the embodiment, the power supply circuit and the power supply control circuit provided by the audio interactive host can provide power and control the power supply, which is conducive to ensuring the performance of the audio interactive host.

[0039] In some embodiments, the audio interactive host further includes a memory connected to the processor.

[0040] Based on the embodiment, the audio interaction host can also be provided with a memory connected with the processor, so that the information that needs to be stored can be stored in the memory, and the information stored in the memory can be analyzed and the audio interaction host can be controlled based on the content stored in the memory.

[0041] In some embodiments, the processor includes at least one of a noise reduction module, a multi-mic fusion module, a digital filter module, an echo cancellation module, a howling suppression module, a mix module, a limiter, an automatic gain control module, a volume adjustment module, an avoidance module, and a control module.

[0042] Based on the embodiment, the processor in the audio interaction host can include at least one of a noise reduction module, a multi-mic fusion module, a digital filter module, an echo cancellation module, a howling suppression module, a mix module, a limiter, an automatic gain control module, a volume adjustment module, an avoidance module, and a control module, so that the received audio signal can be processed in various ways such as noise reduction, multi-mic fusion, digital filtering, echo cancellation, howling suppression, mixing, limiting, automatic gain control, volume adjustment control, and avoidance control according to actual needs, which helps to improve the on-demand control and processing of the audio signal by the audio interaction host, and on this basis, helps to improve the signal quality and on-demand control of the output audio signal. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 A partial module structure schematic diagram of the audio interaction host in an embodiment;

[0044] Figure 2 A partial module structure schematic diagram of the audio interaction host in another embodiment;

[0045] Figure 3 A partial module structure schematic diagram of the audio interaction host in another embodiment;

[0046] Figure 4 A partial module structure schematic diagram of the audio interaction host in another embodiment;

[0047] Figure 5 A partial module structure schematic diagram of the audio interaction host in another embodiment;

[0048] Figure 6 A partial module structure schematic diagram of the audio interaction host in another embodiment. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0050] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0051] The embodiments of the technical scheme of the present application will be described in detail below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot be used to limit the protection scope of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0053] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0054] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0056] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0057] At present, there is a demand for audio input and output in many occasions to realize audio interaction. These possible occasions include, but are not limited to, classroom teaching, online teaching, etc. Based on this demand, an audio interaction host is usually used to perform the functions of audio input and output, so as to meet the demand for audio input and output in such scenarios.

[0058] Taking the teaching scenario as an example, the audio and video collection device such as the recording and broadcasting equipment or the education all-in-one machine plays a core role in the links of audio and video information processing, collection, transmission and recording and broadcasting. With the application of ASR (Automatic Speech Recognition) technology in teaching activities, the ASR technology can help teachers and students to more effectively learn and evaluate language, and also can promote the development of personalized teaching. Therefore, the high-fidelity collection and processing of audio information in teaching quality evaluation and classroom teaching activities are the key to providing a high-quality online and offline live course. In this scenario, the audio signals involved include teacher area audio, student area audio, multimedia courseware audio, and audio information of the remote classroom in interactive teaching. And in the interactive teaching process of two or more classrooms, single teaching and double teaching of two or more different classrooms are involved. Therefore, audio processing is a very core component in the audio and video stream media information processing link of the recording and broadcasting equipment.

[0059] However, the existing audio interaction host usually configures an analog audio signal input interface, which is difficult to meet the demand of the above-mentioned interactive scenario.

[0060] To solve the problem, the embodiments of the present application provide an audio interaction host which can simultaneously access analog audio signals and digital audio signals and process them to meet the demand of the audio interaction scenario, such as the demand of the audio interaction in the classroom teaching scenario.

[0061] Reference Figure 1 As shown in the figure, some embodiments of the present application provide an audio interaction host, wherein the audio interaction host comprises: a processor 10, an analog audio signal input device 20, a digital audio signal input device 30 and an audio output device 40 which are in communication connection with the processor 10;

[0062] The analog audio signal input device 20 is configured to collect analog audio signals and convert the collected analog audio signals into first digital audio signals, and then output the first digital audio signals to the processor 10.

[0063] The digital audio signal input device 30 is configured to obtain a second digital audio signal and output the obtained second digital audio signal to the processor 10,

[0064] The processor 10 is configured to process the accessed first digital audio signal or second digital audio signal, obtain a processed digital audio signal, and output the obtained processed digital audio signal to the audio output device 40.

[0065] The audio output device 40 is configured to output the received processed digital audio signal after being converted into an analog audio signal.

[0066] The analog audio signal input device is a device capable of collecting or obtaining an analog audio signal and converting the analog audio signal into a digital audio signal.

[0067] The analog audio signal is an audio signal carried or represented in the form of an analog signal, and the digital audio signal is an audio signal represented in the form of a digital signal.

[0068] The analog audio signal input device 20 can collect an analog audio signal or be connected to an analog audio signal collection device to obtain an analog audio signal collected by the analog audio signal collection device, and obtain a first digital audio signal after analog-to-digital conversion of the obtained analog audio signal and transmit the first digital audio signal to the processor 10. The digital audio signal input device 30 can collect a second digital audio signal and transmit the second digital audio signal to the processor 10.

[0069] The processor 10 is a device capable of processing a digital audio signal. Some possible processors can be DSP processors. The specific processing manner of the processor 10 for the digital audio signal is not limited, for example, noise reduction processing, filtering processing, echo cancellation processing, etc. The embodiments of the present application do not specifically show this.

[0070] It can be understood that, in the application process of the audio interaction host in a specific scene, only the analog audio signal input device 20 can collect an analog audio signal, or an analog audio signal collection device can be connected to obtain an analog audio signal. Only the digital audio signal input device 30 can collect a digital audio signal, or the analog audio signal input device 20 can collect an analog audio signal and the digital audio signal input device 30 can collect a digital audio signal at the same time. At this time, the processor 10 can select one of the first digital audio signal and the second digital audio signal for processing in the processing process at a certain time, obtain a processed digital audio signal, or perform comprehensive processing such as fusion of the first digital audio signal and the second digital audio signal to obtain a processed digital audio signal.

[0071] Based on the audio interaction host provided in the embodiment, the analog audio signal input device and the digital audio signal input device are provided at the same time, so that the analog audio signal can be collected and acquired, converted into a digital audio signal and given to the processor for processing, and the digital audio signal can be directly acquired and given to the processor for processing, and output through the audio output device after being processed by the processor, so that the analog audio signal or the digital audio signal can be accessed according to the actual scene requirement, or the analog audio signal and the digital audio signal can be accessed at the same time, the requirement of richer audio signal input and audio signal output can be met, and the interaction performance of the audio interaction device is improved.

[0072] In some embodiments, referring to Figure 2 As shown in the figure, the digital audio signal input device 30 includes a digital microphone communication circuit 301 and a network switching circuit 302, the digital microphone communication circuit 301 is in communication connection with the processor 10 through the network switching circuit 302, and the digital microphone communication circuit includes cascaded digital microphones.

[0073] The digital microphone communication circuit is a communication circuit that can cascade multiple levels of digital microphones through a network communication mode, so that multiple digital microphones can be cascaded in four lines, and the collection of the digital audio signal of the cascaded digital microphone array can be realized. The number of cascaded digital microphones is not limited, and in the embodiment of the application, a digital microphone communication circuit that can cascade eight levels of digital microphones can be used.

[0074] The network switching circuit is a circuit that can realize the communication between the digital microphone in the digital microphone communication circuit and the processor 10. The specific circuit structure and display of the network switching circuit are not limited, as long as the communication between the digital microphone and the processor 10 can be realized.

[0075] The digital microphone can use POE (Power Over Ethernet) or direct current power supply (such as 48V direct current power supply), and the power supply can be provided by the host; the audio data picked up by the digital microphone is transmitted to the processor 10 through the network channel.

[0076] Based on the embodiment, the digital audio signal input device includes a digital microphone communication circuit and a network switching circuit, the digital microphone communication circuit includes cascaded digital microphones, the digital microphone collects and acquires a digital audio signal, and the transmission is based on a network, so that the situation of signal interference is reduced compared with the collection of analog models, and the anti-interference performance of the audio signal transmission can be improved.

[0077] The cascading manner of the multiple digital microphones in the digital microphone communication circuit is not limited, and in some embodiments, the cascaded digital microphones are connected through daisy chain links.

[0078] The daisy chain link is a chain structure in which the output of one device is connected to the input of the next device, and multiple devices are connected in series one by one, so as to realize the transmission of signals or data.

[0079] Based on this embodiment, the digital microphones can be connected through daisy chain links, which has a simple connection structure and is easy to manage, can connect multiple digital microphones with limited connection lines, and has strong expansion.

[0080] The cascaded digital microphones in the digital microphone communication circuit can be omnidirectional sound beam microphones in some embodiments.

[0081] The omnidirectional sound beam microphone is a microphone that can realize omnidirectional sound pickup and has a digital signal processing function, and the processed data is transmitted based on a network.

[0082] Based on this embodiment, the digital microphone adopts an omnidirectional sound beam microphone, which can omnidirectionally pick up sound and has a digital signal processing function itself, and is based on network transmission, which can further improve the anti-interference performance of audio signal transmission.

[0083] In some embodiments, in combination with Figure 2 As shown in the figure, the digital audio signal input device 30 can further include:

[0084] A network communication circuit 303 connected to the network switching circuit 302.

[0085] The network communication circuit 303 is a circuit that can realize communication with a network device, and the specific form of the network communication circuit is not limited as long as it can realize communication with the network device. It can be understood that the audio interaction host can be provided with a network interface (such as an Ethernet interface), and the network communication circuit 303 can communicate with the network device through the network interface. Figure 6

[0086] The device that communicates through the network communication circuit 303 is not limited, for example, it can be a host computer or a recording and broadcasting device, but is not limited thereto.

[0087] In the case where the network communication circuit 303 is provided, the network switching circuit 302 can realize communication between the digital microphone in the digital microphone communication circuit and the external network device and the processor 10.

[0088] ​Based on the embodiment, the audio interaction device is provided with a network communication circuit, and can be connected with devices on a network, such as a host computer or a recording and broadcasting machine, based on the network communication circuit, so as to realize the communication connection of the devices on the network, and on this basis, the parameters of the audio interaction host can be configured through the network.

[0089] The analog audio signal input device can include various devices capable of collecting and acquiring analog audio signals. In some embodiments, as shown in FIG. 2, the analog audio signal input device 20 includes: Figure 3

[0090] At least two analog audio signal input interfaces (for example, two analog audio signal input interfaces are taken as an example in FIG. 2), and at least one analog-to-digital conversion device, the analog audio signal input interface is connected with the processor through the analog-to-digital conversion device. Figure 3

[0091] The analog audio signal input interface is an interface capable of accessing analog audio signals, which can be connected with other audio signal collection devices to obtain analog signals collected and output by the audio signal collection device.

[0092] The analog-to-digital conversion device is a device capable of converting analog signals into digital signals.

[0093] Based on the embodiment, the analog audio signal input device includes at least two analog audio signal input interfaces and at least one analog-to-digital conversion device, so as to provide rich analog audio signal input interfaces to access one or more analog audio signals as required, meet the requirement of accessing multiple analog audio signals, and further improve the richness of the audio interaction host.

[0094] In some embodiments, as shown in FIG. 2, the analog audio signal input device includes a wired microphone interface 201, and the analog-to-digital conversion device includes a first analog-to-digital conversion device 202, wherein the first analog-to-digital conversion device 202 includes at least two analog-to-digital conversion chips in a TDM bus cascade, and the wired microphone interface 291 is connected with the processor 10 through the first analog-to-digital conversion device 202. Figure 4

[0095] The wired microphone interface is an interface connected with a microphone through a wired connection.

[0096] ​​​The TDM bus cascade is a cascade mode for transmitting data of multiple audio channels on the same time line by time division multiplexing, which can realize efficient data transmission and processing. In the embodiment of the application, two analog-to-digital conversion chips are cascaded together, that is, the TDM output of the analog-to-digital conversion chip of the first chip is connected to the TDM input of the analog-to-digital conversion chip of the second chip, so that multiple analog-to-digital conversion channels can be formed, for example, 8-channel analog-to-digital conversion channels can be formed in the embodiment of the application.

[0097] In a specific application, 8-channel differential audio input signal sources can be supported at the same time. The wired microphone interface 201 can be connected to phantom power hanging microphones or desktop microphones. The number of connected digital microphones can be determined according to the application scenario.

[0098] Based on the embodiment, the analog audio signal input device includes a wired microphone interface, and the first analog-to-digital conversion device connected to the wired microphone interface includes at least two analog-to-digital conversion chips in TDM bus cascade, so that the wired microphone can be connected to the analog audio signal collected and obtained by the wired microphone, and more ADC conversion channels can be realized by the at least two analog-to-digital conversion chips in TDM bus cascade, on the basis of which more wired microphones can be connected to further improve the richness of the audio interaction host.

[0099] In some embodiments, as shown in Figure 4 The analog audio signal input device includes a linear audio input interface, a microphone audio input interface, a wireless audio receiver, and a differential audio input interface. Two of the linear audio input interface, the microphone audio input interface, the wireless audio receiver, and the differential audio input interface are connected to the processor through the second analog-to-digital conversion device, and the other two are connected to the processor through the third analog-to-digital conversion device.

[0100] The wireless audio receiver is a device that can communicate with a wireless microphone by wireless means and obtain analog audio information of the wireless microphone. In some examples, the wireless audio receiver can receive information collected by two or more wireless microphones.

[0101] The differential audio input interface is an interface that can connect to the differential output of a third-party audio processor or the interface of a non-inductive sound expansion audio host, so as to realize differential input of analog audio signals. By using the differential input signal mode, the anti-interference performance of the analog audio signal transmission is ensured.

[0102] Based on the embodiment, the analog audio signal input device can further include a linear audio input interface, a microphone audio input interface, a wireless audio receiver and a differential audio input interface, so that more types of analog audio signals can be accessed, and two of the interfaces are connected to the processor through the second analog-digital conversion device, and the other two are connected to the processor through the third analog-digital conversion device, so that the number of analog-digital conversion devices can be reduced, and the cost of the audio interactive device is reduced while the number of types of analog audio signals accessed is increased.

[0103] The linear audio input interface, the microphone audio input interface, the wireless audio receiver and the differential audio input interface are not limited in the corresponding relationship with the second analog-digital conversion device and the third analog-digital conversion device, and any two of the linear audio input interface, the microphone audio input interface, the wireless audio receiver and the differential audio input interface can be connected to the second analog-digital conversion device, and the other two can be connected to the third analog-digital conversion device.

[0104] In some specific examples of the present application, referring to Figure 4 The analog audio signal input device includes a linear audio input interface 203 and a microphone audio input interface 204, the analog-digital conversion device includes a second analog-digital conversion device 207, and the linear audio input interface 203 and the microphone audio input interface 204 are connected to the processor 10 through the second analog-digital conversion device 207.

[0105] The analog audio signal input device includes a wireless audio receiver 205 and a differential audio input interface 206, the analog-digital conversion device includes a third analog-digital conversion device 208, and the wireless audio receiver 205 and the differential audio input interface 206 are connected to the processor 10 through the third analog-digital conversion device 208.

[0106] Based on the embodiment, the linear audio input interface and the microphone audio input interface are connected to the processor through the second analog-digital conversion device, and the wireless audio receiver and the differential audio input interface are connected to the processor through the third analog-digital conversion device, so that the second analog-digital conversion device can be dedicated to analog-digital conversion of analog audio signals accessed through the linear audio input interface and the microphone audio input interface, and the third analog-digital conversion device can be dedicated to analog-digital conversion of analog audio signals accessed through the wireless audio receiver and the differential audio input interface, which is helpful for the application of the audio interactive host and further improves the richness and application reliability of the audio interactive host.

[0107] In some embodiments, the second analog-digital conversion device and the third analog-digital conversion device are analog-digital conversion chips.

[0108] Based on the embodiment, the analog-to-digital conversion device is implemented by using an analog-to-digital conversion chip, the analog-to-digital conversion chip has the characteristics of high integration, high precision, high speed, and low power consumption, and can reduce the size and cost of the audio interactive host while maintaining high-performance analog-to-digital conversion.

[0109] In some embodiments, the audio output device includes at least one digital-to-analog conversion device connected to the processor, and an audio output interface connected to the digital-to-analog conversion device, respectively, the audio output interface includes a differential audio output interface and at least one linear audio output interface.

[0110] In combination Figure 5 As shown, Figure 5 As shown in the embodiment, the audio output device includes a first digital-to-analog conversion device, a second digital-to-analog conversion device, and a third digital-to-analog conversion device, wherein the input end of the first digital-to-analog conversion device is connected to the processor, and the output end is connected to the first linear audio output interface, the input end of the second digital-to-analog conversion device is connected to the processor, and the output end is connected to the second linear audio output interface, the input end of the second digital-to-analog conversion device is connected to the processor, and the output end is connected to the differential audio output interface.

[0111] The first linear audio output interface, the second linear audio output interface, and the differential audio output interface can be connected to different audio playback devices, respectively, or output to audio playback devices at different locations. For example, the first linear audio output interface can be connected to a local conference room or classroom active speaker, the second linear audio output interface can be connected to a viewing room or other room active speaker, and the differential audio output interface can be connected to a third-party audio processor.

[0112] In particular, when controlling the audio output, the processor can control the output of the first linear audio output interface, the second linear audio output interface, and the differential audio output interface, for example, configure an audio matrix to realize which audio signal source the first linear audio output interface, the second linear audio output interface, and the differential audio output interface correspond to output, and the application embodiment does not limit the processing and configuration of the processor.

[0113] Based on the embodiment, the audio output device can include a differential audio output interface and at least one linear audio output interface, and the analog audio signal obtained after the digital-to-analog conversion of the digital-to-analog conversion device can be output through the differential audio output interface and the at least one linear audio output interface, thereby meeting the different audio output requirements and further improving the richness of the audio interactive host.

[0114] In some embodiments, referring to Figure 5As shown, the audio output device comprises: a power amplifier output circuit connected with the processor.

[0115] Power amplifier (Power Amplifier) for short, generally refers to a kind of most basic device in sound system, commonly known as "amplifier", it can amplify the weak electric signal of received signal source to drive loudspeaker to emit sound. By setting power amplifier output circuit, audio interactive host can connect power amplifier through power amplifier output circuit, for example, connect a pair of impression, realize sound amplification playback.

[0116] In some embodiments, the power amplifier output circuit can output amplified sound source through I2S (Inter-IC Sound, built-in audio bus) digital audio communication interface, and the power amplifier output interface directly connects passive speaker.

[0117] Based on the embodiment, the audio output device can further comprise a power amplifier output circuit connected with the processor, so that the power amplifier circuit can be connected through the power amplifier output circuit for audio output, meeting the demand of power amplifier output audio signal, and further improving the richness of the audio interactive host.

[0118] In some embodiments, referring to Figure 5 As shown, the audio output device comprises: a USB (Universal Serial BUS, Universal Serial Bus) sound card circuit connected with the processor.

[0119] By setting the USB sound card circuit, the audio interactive host can be directly connected to recording and broadcasting host or PC and other audio playback devices supporting UAC (USB AudioClass) function.

[0120] Based on the embodiment, the audio output device can further comprise a universal serial bus sound card circuit connected with the processor, so that the external audio playback device can be connected through the universal serial bus sound card circuit, meeting the demand of audio signal output through the universal serial bus interface, and further improving the richness of the audio interactive host.

[0121] In some embodiments, the digital-to-analog conversion device is a digital-to-analog conversion chip.

[0122] In combination with Figure 5 As shown, the first digital-to-analog conversion device, the second digital-to-analog conversion device and the third digital-to-analog conversion device can all be implemented by using a digital-to-analog conversion chip.

[0123] Based on the embodiment, the digital-to-analog conversion device is implemented by using a digital-to-analog conversion chip, which has the characteristics of high integration, high precision, high speed and low power consumption, and can reduce the size and cost of the audio interactive host while maintaining high-performance digital-to-analog conversion.

[0124] In some embodiments, as shown in Figure 6 The audio interactive host further includes a power supply circuit 50 connected to the processor 10, and a power supply control circuit 60 connected to the power supply circuit 50, the power supply control circuit 60 is also connected to the common end of the wired microphone interface 201 and the first analog-to-digital conversion device 202, the digital microphone communication circuit 301, and the processor 10.

[0125] The power supply circuit is a circuit that provides power supply, and the power supply control circuit is a circuit that controls the power supply or cut-off. Through the cooperation of the power supply circuit and the power supply control circuit, the power supply can be turned on or off. For example, the power supply of the externally connected directional microphone can be turned on or off. The specific structure of the power supply circuit is not limited, as long as it can realize power supply. The specific structure of the power supply control circuit is not limited, as long as it can realize power supply control.

[0126] In some specific examples, the power supply circuit 50 can realize the 48V power supply of the digital microphone and the phantom power supply microphone, and the power supply control circuit 60 realizes the power control of the digital microphone and the phantom power supply microphone channel. For example, when a desktop microphone is connected, the microphone itself has power supply capability, and at this time the phantom power supply needs to be turned off.

[0127] Based on the embodiment, through the power supply circuit and the power supply control circuit provided by the audio interactive host, the power supply can be provided and the power supply can be controlled, which is conducive to ensuring the performance of the audio interactive host.

[0128] In some embodiments, as shown in Figure 6 The audio interactive host further includes a memory 70 connected to the processor 10.

[0129] By setting the memory 70, the audio data required for analyzing the original audio of the recording and broadcasting host during the audio processing process can be stored in the memory 70, which is convenient for subsequent use and analysis of the audio data.

[0130] Based on the embodiment, the audio interactive host can also be provided with a memory connected to the processor, so that the information that needs to be stored can be stored in the memory, and the information stored in the memory can be analyzed and the audio interactive host can be controlled based on the content stored in the memory.

[0131] The processor 10 is a device capable of processing a digital audio signal, and the processor 10 is not limited in a specific processing manner of the digital audio signal. In some embodiments, the processor 10 includes at least one of a noise reduction module, a multi-mic fusion module, a digital filter module, an echo cancellation module, a howling suppression module, a mix module, a limiter, an automatic gain control module, a volume adjustment module, an avoidance module, and a control module.

[0132] Based on the embodiments, the processor in the audio interaction host can include at least one of a noise reduction module, a multi-mic fusion module, a digital filter module, an echo cancellation module, a howling suppression module, a mix module, a limiter, an automatic gain control module, a volume adjustment module, an avoidance module, and a control module, so that the received audio signal can be processed in various possible manners such as noise reduction processing, multi-mic fusion processing, digital filter processing, echo cancellation processing, howling suppression processing, mix processing, limiter processing, automatic gain control, volume adjustment control, avoidance control, and the like according to actual needs, which helps to improve the on-demand control and processing of the audio signal by the audio interaction host, and helps to improve the signal quality and on-demand control of the output audio signal.

[0133] Based on the audio interaction host provided by the embodiments of the present application as described above, the audio interaction host has rich audio input and output function interfaces, and can fully realize the application functions of a professional audio processor on the audio host for the demand for audio input, collection, and output in a normal application scenario. Taking application in a teaching scenario as an example, in a normal scheme, two directional microphones can be matched to ensure clear speech in the podium area; and one or two omnidirectional microphones can be matched to ensure sound pickup in the student area, so that high-quality audio services are realized while the cost is reduced. Moreover, the audio interaction host can be connected to various structures, can be connected to various types of audio input devices and audio playback devices, has good old benefit characteristics, and helps to further promote and apply.

[0134] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0135] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An audio interactive host, characterized by, The audio interaction host comprises a processor, an analog audio signal input device, a digital audio signal input device and an audio output device connected to the processor in communication; The analog audio signal input device is configured to collect analog audio signals and convert the collected analog audio signals into first digital audio signals and then output the first digital audio signals to the processor; The digital audio signal input device is configured to obtain second digital audio signals and output the obtained second digital audio signals to the processor, The processor is configured to process the accessed first digital audio signals or second digital audio signals, obtain processed digital audio signals and output the obtained processed digital audio signals to the audio output device; The audio output device is configured to convert the received processed digital audio signals into analog audio signals and then output the analog audio signals.

2. The audio interactive host of claim 1, wherein, The digital audio signal input device comprises a digital microphone communication circuit and a network switching circuit, the digital microphone communication circuit is connected to the processor in communication through the network switching circuit, and the digital microphone communication circuit comprises cascaded digital microphones.

3. The audio interactive host of claim 2, wherein, The digital audio signal input device further comprises: a network communication circuit connected to the network switching circuit.

4. The audio interactive host of claim 2, wherein, The cascaded digital microphones are connected through a daisy chain link, and / or the digital microphones are omnidirectional sound beam microphones.

5. The audio interactive host of any of claims 1 to 4, wherein, The analog audio signal input device comprises: at least two analog audio signal input interfaces and at least one analog-to-digital conversion device, the analog audio signal input interfaces are connected to the processor through the analog-to-digital conversion device.

6. The audio interactive host of claim 5, wherein, At least one of the following is included: The analog audio signal input device comprises a wired microphone interface, the analog-to-digital conversion device comprises a first analog-to-digital conversion device, the first analog-to-digital conversion device comprises at least two analog-to-digital conversion chips cascaded through a TDM bus, and the wired microphone interface is connected to the processor through the first analog-to-digital conversion device; The analog audio signal input device comprises a linear audio input interface, a microphone audio input interface, a wireless audio receiver and a differential audio input interface, the analog-to-digital conversion device comprises a second analog-to-digital conversion device and a third analog-to-digital conversion device, two of the linear audio input interface, the microphone audio input interface, the wireless audio receiver and the differential audio input interface are connected to the processor through the second analog-to-digital conversion device, and the other two are connected to the processor through the third analog-to-digital conversion device.

7. The audio interaction host of claim 6, wherein: The analog audio signal input device comprises a linear audio input interface and / or a microphone audio input interface, the analog-to-digital conversion device comprises a second analog-to-digital conversion device, and the linear audio input interface and the microphone audio input interface are connected to the processor through the second analog-to-digital conversion device; The analog audio signal input device comprises a wireless audio receiver and / or a differential audio input interface, the analog-digital conversion device comprises a third analog-digital conversion device, and the wireless audio receiver and the differential audio input interface are connected with the processor through the third analog-digital conversion device.

8. The audio interactive host of claim 7, wherein, The second analog-digital conversion device and the third analog-digital conversion device are analog-digital conversion chips.

9. The audio interactive host of any of claims 1 to 4, wherein, At least one of the following is comprised: The audio output device comprises at least one digital-analog conversion device connected with the processor, and an audio output interface connected with the digital-analog conversion device respectively, wherein the audio output interface comprises a differential audio output interface and at least one linear audio output interface; The audio output device comprises a power amplifier output circuit connected with the processor. The audio output device comprises a universal serial bus sound card circuit connected with the processor.

10. The audio interactive host of claim 9, wherein, The digital-analog conversion device is a digital-analog conversion chip.

11. The audio interactive host of any of claims 1 to 4, wherein, At least one of the following is comprised: The audio interactive host further comprises a power supply circuit connected with the processor, and a power supply control circuit connected with the power supply circuit, wherein the power supply control circuit is further connected with a common terminal of the wired microphone interface and the first analog-digital conversion device, a digital microphone communication circuit, and the processor; The audio interactive host further comprises a memory connected with the processor; The processor comprises at least one of a noise reduction module, a multi-microphone fusion module, a digital filter module, an echo cancellation module, a howling suppression module, a mix sound module, a limiter, an automatic gain control module, a volume adjustment module, an avoidance module, and a control module.

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