CN204216969U - A kind of voice-communication device of novel meeting stereo process - Google Patents

Abstract

The utility model discloses a kind of voice-communication device of novel meeting stereo process, comprise: LCD shows, master control MCU, interface circuit, mixed-media network modules mixed-media circuit, speech processes MCU, and at least more than one sound card is connected with described speech processes MCU, this sound card receives the phonetic entry of external voice equipment for gathering, speech processes MCU one end is connected with described master control MCU, the other end is connected with sound card, above-mentioned master control MCU carries out audio mixing by from the voice data of local voip conversation circuit input and the voice data of local microphone input, generate local terminal audio mixing data, speech processes MCU is used for the speech data received by sound card, master control MCU transmits the described local terminal audio mixing data come and carries out cumulative aliasing, to generate extended audio audio mixing data.The utility model scheme receives the voice data of multiple external voice equipment by arranging multiple sound card, and through the stereo process of conference call, finally realizes the call mode of multiple terminal meeting.

Description

A new type of audio communication equipment for conference audio mixing

technical field

The utility model belongs to the field of audio and video communication, in particular based on the extended processing technology of multi-party conference voice on the voice communication equipment.

Background technique

With the development and maturity of audio and video processing technology, video conferencing based on audio and video processing technology emerges as the times require. On the other hand, conference phones are becoming an important part of any enterprise organization's endpoint product portfolio. Therefore, multimedia conferencing that integrates advanced IP applications and high-definition audio and video technologies can improve user experience and ultimately have a positive impact on business communications. However, if you want the VoIP phone to also connect with traditional communication equipment, such as mobile phones, APP software, computer software, traditional telecom telephones, etc. to communicate on a unified platform, some more complicated server support is required at this time, which will undoubtedly increase operating costs. , and there will be many unstable factors, and the sound quality of the call cannot be guaranteed. In addition, also within VoIP, because each server manufacturer is relatively independent, users using different services cannot talk in a conference. Therefore, in order to solve the above-mentioned problems, it is necessary to provide a simple conference sound mixing device, which is convenient for multiple terminals of different types to participate in the same voice conference.

Contents of the invention

The purpose of the utility model is to provide a new type of voice communication equipment for conference sound mixing processing, which realizes multi-party voice conference through analog audio collection and sound mixing.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is that a new type of voice communication equipment for conference mixing processing, including: LCD display, main control MCU, interface circuit, network module circuit, voice processing MCU, and at least one The above sound card is connected to the voice processing MCU, and the sound card is used to collect and receive voice input from an external voice device. One end of the voice processing MCU is connected to the main control MCU, and the other end is connected to the sound card.

Preferably, the sound card end is also connected with a filter circuit and a power amplifier circuit, wherein the filter circuit is used to filter out the current harmonics and DC components of the external input strong analog signal, and the power amplifier circuit is used to change the strength of the voice signal , to ensure that the signal strength is within the acceptable range of the sound card.

Preferably, the main control MCU mixes the audio data input from the local VoIP session line and the audio data input from the local microphone to generate local audio mixing data, and is responsible for local audio output.

Preferably, the voice processing MCU is mainly responsible for implementing audio mixing processing, for accumulating and aliasing the voice data received by the sound card and the local audio mixing data transmitted by the main control MCU, so as to generate extended Audio mixing data.

Preferably, the voice processing MCU also reserves a USB interface to support the connection of an external USB sound card and expand conference channels.

Preferably, the main control MCU is connected with a Bluetooth communication module circuit and/or a network module circuit for voice input and output of the local VoIP conversation line.

The utility model is a new voice communication device for conference sound mixing processing. By setting multiple physical sound cards to receive voices from different types of external voice devices, and after mixing and superimposing processing, the compatibility of different types of communication terminals is realized. and unity. The implementation scheme is simple and flexible, improves the voice quality of the call to a certain extent, and well avoids the influence of the server side in the process of the multi-party conference mode under the software implementation mode.

Description of drawings

Fig. 1 is the voice connection schematic diagram of VoIP phone of the present invention and external communication equipment;

Fig. 2 is the hardware frame diagram of the utility model VoIP phone;

Fig. 3 is the internal structure diagram of the voice processing MCU in the VoIP phone of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the technical solutions in the embodiments of the utility model are clearly and completely described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art belong to the protection scope of the present utility model.

The purpose of adding a plurality of physical sound cards at the communication device of the present invention is to add the audio data of the external voice equipment into the local conference call as an ordinary call, because the external communication equipment is independent of the communication device of the present invention. Other types of communication terminals, for example, can be in the form of smart phones, VoIP phones, ordinary phones, or computers. If you want to input the voice received by the above-mentioned various types of communication terminals into the communication device of the present invention, you can pass The added physical sound card collects various analog signals, and performs mixing processing with the audio data collected by the local microphone. Therefore, the utility model can complete the re-adaptation of the analog audio data input by the third-party communication equipment after adding multiple physical sound cards to the communication device, such as a VoIP phone.

Sound card is also called audio card or sound card, including physical sound card and virtual sound card. Among them, the physical sound card is a kind of hardware that realizes the mutual conversion between sound waves and digital signals, and is a basic component of multimedia equipment. The basic function of a physical sound card is to convert original sound signals from microphones, CDs, etc., and then output them to audio equipment such as headphones, speakers, and tape recorders. The basic functions of the physical sound card include: audio synthesis and pronunciation function, sound mixing function and digital signal processing function, input and output function of analog sound signal, digital-to-analog conversion, and analog-to-digital conversion. The above-mentioned sound mixing function is mainly realized by the sound mixer in the physical sound card, which controls the sound source and the size of the audio signal.

A physical sound card usually mainly includes the following interfaces:

The line input interface, which is marked as "Line In", is used to receive the input sound signal. It is usually connected to an external auxiliary audio source, such as a radio, a video recorder, etc., and is generally connected to the audio output port of the auxiliary audio source.

The linear output interface, which is marked as "Line Out", also known as the Line Out interface, is responsible for outputting the sound signal processed by the sound card to active speakers, headphones or other audio amplification devices.

The microphone input interface, marked as "Mic In", also known as the Mic In interface, is used to receive recorded sound, such as call sound signals. The microphone input interface is usually connected with a microphone.

The speaker output interface, marked as "Speaker" or "SPK", also known as the Speaker interface, is used for plugging in the audio cable plug of an external speaker.

In the specific embodiment 1 of the present utility model, the local communication device is explained by taking the VoIP phone as an example. In fact, we don't need to care what type of communication device the third party device is. FIG. 1 is a schematic diagram of the voice connection between the VoIP telephone set of the present invention and an external communication device. It can be seen from the figure that the local VoIP phone user A integrates the foreign user B, user C, and user D into the same voice communication by connecting other communication devices, such as: telephone, notebook, and mobile phone. Here, the same voice communication can be initiated by user A using the multi-party conference call function of the local VoIP phone, or it can be a common multi-party voice call. In the solution of the utility model, at least three physical sound cards are arranged inside the VoIP phone, and are connected with the local external telephone, the external computer voice, or the local external mobile phone voice through the 3.5mm audio output. Wherein, the connection with the local external telephone is directly connected to the handle interface. Through this solution, the other three local communication terminals can be flexibly extended to the multi-party conference of the VoIP phone.

Fig. 2 is a hardware frame diagram of the VoIP phone of the present invention. As shown in the figure, the VoIP phone terminal mainly includes: sound card 1, sound card 2, sound card 3, voice processing MCU, main control MCU, control circuit, LCD display, interface circuit, Bluetooth communication module circuit, other audio function module circuits, network Module circuit, LCD display, and a section of filter circuit and voice power amplifier circuit are added to connect each sound card and external interface.

Among them, the filter circuit is used to filter out the current harmonics and DC components of the external input strong analog signal. The purpose of the voice power amplifier circuit is to change the strength of the voice signal according to the actual situation and ensure that the signal strength is within the acceptable range of the sound card. Inside.

In addition to connecting multiple sound cards, the voice processing MCU also reserves a USB interface to support external USB sound card connections and expand conference channels. The voice processing MCU is controlled by the main control MCU through a control circuit. At the same time, the main control MCU transmits the local audio data to the voice processing MCU, and the voice processing MCU performs the mixing operation. The voice processing MCU is to select a main control chip that supports more than 4 channels of audio input, and is mainly responsible for realizing sound mixing processing, and will receive voice data from each sound card, and local audio mixing data transmitted from the main control MCU. Audio mixing processing is further performed to generate extended audio mixing data. Internally supports hardware noise cancellation, hardware echo cancellation, gain control and other functions, which are optional additional functions.

Fig. 3 is the internal structure diagram of the voice processing MCU in the VoIP phone of the present invention. As shown in Figure 3, we can know the structure of the specific sound mixing method inside the voice processing MCU. Sound card 1, sound card 2, sound card 3, and one USB external sound card are connected to the voice processing MCU. The above-mentioned four-way sound card input audio is collected and transmitted to the voice processing MCU. In addition, combined with the local voice data transmitted from the main control MCU, that is, the above-mentioned local audio mixing data, it is accumulated and aliased once in the voice processing MCU chip, and the extended audio mixing data is generated and output to each channel go up. Before outputting, the original input data of this channel needs to be subtracted to ensure that there is no echo. The final output data size is controlled by the control circuit of the main control MCU, and the data is multiplied or divided by a coefficient to increase or decrease the volume.

The main control MCU is mainly connected to many VoIP hardware circuits on the VoIP phone, including: LCD display, interface circuit, network module circuit, Bluetooth communication module circuit, and other audio function modules. The main control MCU is the core processing module of the entire VoIP phone. In the solution of the utility model, the local audio mixing process is mainly performed to generate the local audio mixing data, that is, the audio data input from the local VoIP conversation line and the audio input from the local microphone. The data is mixed. The input of the local VoIP session line includes: the audio data input by the Bluetooth communication module circuit and the network module circuit, and the audio input of the local microphone is mainly received through the interface circuit.

The bluetooth communication module circuit is a part of the VoIP phone, and receives voice input from nearby terminal devices through the bluetooth communication mode.

The network module circuit can receive multi-channel IP conversation voice from the network side.

Other audio function modules, including EHS, RJ9, handle, hands-free, are responsible for the local voice input and output of the VoIP phone, including the handle, and the connection of the hands-free device through the mixing processing in the main control MCU, and the connection with the mixing processing also includes the The audio data from the Bluetooth communication module circuit and the network module circuit will send the mixed data to the voice processing MCU for secondary mixing, and pass the data through the sound card as shown in the figure, including the USB peripheral part. Set up the connecting device, through these several times of mixed audio transmission, any participant can effectively connect, receive and transmit voice, and communicate with each other, which truly realizes the function of multi-party barrier-free conference.

Interface circuit, the main function is responsible for interface circuits such as VoIP phone dial buttons.

LCD display, under the control of the main control MCU, displays the current status of each communication line, and is used for UI interface display or operation interaction command input during the voice conference.

In the present utility model, the audio access terminal is not limited to the VoIP phone, and the voice communication equipment connected to it can include a common phone, a computer, a smart phone, and the like. As for the hardware interface part connected with the sound card, the utility model is not limited to using a 3.5mm audio interface, and can also use some other audio interfaces such as an RJ9 audio interface, a USB interface, and the like to meet the matching connection between various devices.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (9)

1. A new type of voice communication equipment for conference mixing processing, comprising: LCD display, main control MCU, interface circuit, network module circuit, characterized in that, said voice communication equipment also includes: voice processing MCU, and at least one The sound card is connected to the voice processing MCU, and the sound card is used to collect and receive voice input from an external voice device. One end of the voice processing MCU is connected to the main control MCU, and the other end is connected to the sound card. 2. The voice communication device according to claim 1, wherein the sound card end is also connected with a filter circuit and a power amplifier circuit, wherein the filter circuit is used to filter out current harmonics caused by an externally input strong analog signal. Wave and DC components, the power amplifier circuit is used to change the strength of the voice signal to ensure that the signal strength is within the acceptable range of the sound card. 3. The voice communication device according to claim 2, wherein the main control MCU mixes the audio data input from the local VoIP conversation line and the audio data input by the local microphone to generate local audio mixing data . 4. The voice communication device according to claim 3, wherein the voice processing MCU is mainly responsible for realizing sound mixing processing, and is used for voice data received by the sound card and the voice data transmitted by the main control MCU. The audio mixing data at the local end is accumulated and aliased to generate the extended audio mixing data. 5 . The voice communication device according to claim 4 , wherein the voice processing MCU also reserves a USB interface for supporting the connection of an external USB sound card and expanding conference channels. 6 . 6. The voice communication device according to claim 5, characterized in that, the hardware interface connected to the sound card can be: 3.5mm audio interface, RJ9 audio interface. 7. The voice communication device according to claim 6, wherein the main control MCU is connected with a bluetooth communication module circuit and/or a network module circuit for voice input and output of the local VoIP conversation line. 8. The voice communication device according to claim 7, wherein the voice communication device is a VoIP phone. 9. The voice communication device according to claim 8, characterized in that, the communication with the external voice device comprises: an ordinary telephone, a computer, and a smart phone.