A sound card system for realizing network live broadcast

Abstract

This application relates to a sound card system for realizing network live broadcast, belonging to the technical field of sound cards. This application is applicable to the technical field where network live broadcast can be realized by simply connecting a USB TYPE-C cable. Compared with existing products on the market, while covering all the functions of sound cards on the market, it adds OVP and OCP input voltage overvoltage and overcurrent protection functions, and has more advantages in product power consumption and cost. At the same time, it retains the mixing adjustment of MIC input human voice and music playback, and MIC input MUTE. The entire solution only uses one CODEC chip and six operational amplifiers, with lower power consumption and more advantages in product cost.

Description

Technical Field

[0001] The present invention relates to a sound card system for realizing network live broadcast, belonging to the technical field of sound cards. Background Art

[0002] Currently, the live broadcast sound cards on the market that use the XMOS chip XU316 have the following functions: existing MIC input, instrument input, gain adjustment, connecting headphones for output monitoring, connecting active speakers for setting monitoring, and mixing adjustment of MIC input vocals and music playback; it is standard with two microphone / instrument COMBO interface inputs, a single headphone and left and right stereo output monitoring. Some brand models will add an electronic keyboard MIDI input / output interface. Only one USB TYPE-C cable is needed to connect IOS / WINDOWS devices to achieve live broadcast. However, the functions of existing professional recording sound cards on the market are generally few and single.

[0003] For example: Chinese Utility Model Patent: CN201822243572.9, the "multi-channel sound card with monitoring function" disclosed in it, its specification discloses that the functions of existing sound cards are few...; the above patent can prove the defects existing in the prior art.

[0004] Therefore, we make improvements on this and propose a sound card system for realizing network live broadcast. Summary of the Invention

[0005] (1) The technical problem to be solved by the present invention is: the problem that the functions of existing professional recording sound cards on the market are generally few and single.

[0006] (2) Technical Solution

[0007] In order to achieve the above-mentioned invention purpose, the present invention provides a sound card system for realizing network live broadcast, including a power supply module, an analog interface input module, an analog interface output module, a digital interface input / output module, a microprocessor, and a digital audio decoding module;

[0008] The analog interface input module includes two composite COMBO input female sockets, and each composite COMBO input female socket is connected to a microphone XLR balanced head to input a voice signal and a 6.35mm instrument analog signal input;

[0009] The analog interface output module includes a stereo 6.35mm headphone monitoring interface and two left and right channel 6.35mm interfaces, and the two left and right channel 6.35mm interfaces are output-connected to active speaker devices;

[0010] The digital interface input / output module includes a MIDI digital signal input female socket interface and a MIDI digital signal output female socket interface;

[0011] The digital audio decoding module includes a pure digital decoding main control XU316 and an integrated ADC and DAC audio signal conversion CODEC chip.

[0012] Among them, the power supply module includes:

[0013] An integrated OVP and OCP chip, and the model of the integrated OVP and OCP chip is P14C5N;

[0014] A dual-output DCDC buck chip, and the model of the dual-output DCDC buck chip is MP2122;

[0015] A DCDC boost dual-output chip, and the model of the DCDC boost dual-output chip is TPS65131;

[0016] A fixed +5V output LDO chip and a fixed -5V output LDO chip. The model of the fixed +5V output LDO chip is SGM2211-5.0, and the model of the fixed -5V output LDO chip is SGM2209-5.0;

[0017] A fixed +3.3V output LDO chip, and the model of the fixed +3.3V output LDO chip is SGM2211-3.3;

[0018] An output 48V phantom power DCDC boost chip, and the model of the output 48V phantom power DCDC boost chip is TPS61170.

[0019] Among them, the microprocessor consists of a USB audio decoding chip and an IO expansion chip, and the model of the IO expansion chip is AW9523B.

[0020] Among them, the digital interface input and output module has digital-to-analog and analog-to-digital decoding conversion and MIDI digital signal input and output. The digital-to-analog and analog-to-digital decoding conversion uses a CS4272 model chip. The MIDI digital signal input and output consists of an optocoupler and two buffers. The model of the optocoupler is 6N137S-TA1-L, and the model of the buffer is SN74AUP1G126DBV.

[0021] Among them, two microphone XLR balanced head input voice signals and two 6.35mm musical instrument analog signal inputs have an input amplification module. The input amplification module consists of four operational amplifiers, and the model of the operational amplifier is NJM4580E.

[0022] Among them, the headphone monitoring interface has a monitoring headphone amplifier output, and the connection output between the monitoring headphone amplifier output and the active speaker device has an output amplification module, which is composed of two operational amplifiers, and the model of the operational amplifier is NJM4580E.

[0023] Among them, the model of the USB audio decoding chip is XU316-1024-QF60B-PP24, and the USB audio decoding chip supports UAC 2.0 protocol, ASIO, Windows, Linux, Android, MAC OS, IOS and audio interfaces.

[0024] Among them, the power supply module includes +5V, DD_3.3V for powering the CODEC, ±5V for powering the operational amplifier, VDD_1.8V, and VDD_0.9V for powering the pure digital decoding main control XU316.

[0025] (III) Beneficial effects

[0026] A sound card system for realizing network live broadcast provided by the present invention has the following beneficial effects:

[0027] This application is applicable to the technical field of network live broadcast that can be realized by simply connecting a USB TYPE-C connection cable. Compared with existing products on the market, while covering all sound card functions on the market, it adds OVP and OCP input voltage overvoltage and overcurrent protection functions, and the product power consumption and cost are more advantageous. At the same time, it retains the MIC input human voice and music playback mixing adjustment, and MIC input MUTE. The entire solution uses one CODEC chip and six operational amplifiers, with lower power consumption and more advantageous product cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 It is a block diagram of the sound card system for realizing network live broadcast provided by the embodiment of the invention;

[0030] Figure 2 It is the electrical principle of the power supply conversion module provided by the embodiment of the invention Figure 1 ;

[0031] Figure 3 It is the electrical principle of the power supply conversion module provided by the embodiment of the invention Figure 2 ;

[0032] Figure 4 The electrical principle of the power supply conversion module provided by the invention embodiment Figure 3 ;

[0033] Figure 5 The electrical principle of the power supply conversion module provided by the invention embodiment Figure 4 ;

[0034] Figure 6 The electrical principle of the microprocessor provided by the invention embodiment ​ ;

[0035] ​ The electrical principle of the microprocessor provided by the invention embodiment ​ ;

[0036] ​ The electrical principle of the microprocessor provided by the invention embodiment ​ ;

[0037] ​ The electrical schematic diagram of the first microphone and instrument input provided by the invention embodiment;

[0038] ​ The electrical schematic diagram of the second microphone and instrument input provided by the invention embodiment;

[0039] ​ The electrical schematic diagram of the connection to the headphone output for monitoring provided by the invention embodiment;

[0040] ​ The electrical schematic diagram of the connection to the active speaker output for monitoring provided by the invention embodiment;

[0041] ​ The electrical schematic diagram of the MIDI - type keyboard digital input and output provided by the invention embodiment;

[0042] ​ The electrical schematic diagram of the audio decoding CODEC part provided by the invention embodiment. Specific implementation manners

[0043] The following combines the description of the accompanying drawings of the specification and the embodiments to make a more detailed description of the specific implementation manners of the present invention. The following embodiments are only used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0044] Embodiment:

[0045] Such as ​ , ​ , ​ , ​ , ​ , ​ , ​ , ​ , ​ ,​ , ​ , ​ , ​ and ​ As shown in ​ , ​ , ​ , ​ and ​ , this embodiment provides a sound card system for realizing network live broadcast, including a power module, an analog interface input module, an analog interface output module, a digital interface input / output module, a microprocessor and a digital audio decoding module;

[0046] The analog interface input module includes two composite COMBO input female sockets, and each composite COMBO input female socket is connected to a microphone XLR balanced head to input voice signals and a 6.35mm musical instrument analog signal input;

[0047] The analog interface output module includes a stereo 6.35mm headphone monitoring interface and two left and right channel 6.35mm interfaces. The two left and right channel 6.35mm interfaces are connected to active speaker devices. The signal is output from the CODEC chip as a differential signal, which is then converted into a single-ended signal by an operational amplifier and output to a single stereo 3.5mm female socket interface. The user inserts a 3.5mm male plug to connect to the headphone to monitor music and voice signals. Another path is that the differential signal output from the CODEC chip is converted into a single-ended signal by an operational amplifier and then output to the left and right channels respectively and connected to two 6.35mm audio female sockets;

[0048] The digital interface input / output module includes a MIDI digital signal input female socket interface and a MIDI digital signal output female socket interface;

[0049] The digital audio decoding module includes a pure digital decoding main control XU316 and an integrated ADC and DAC audio signal conversion CODEC chip.

[0050] As ​ , ​ , ​ and ​ shown, as a preferred embodiment, on the basis of the above method, further, the power module includes:

[0051] An integrated OVP and OCP chip, and the model of the integrated OVP and OCP chip is P14C5N;

[0052] A dual-output DCDC buck chip, and the model of the dual-output DCDC buck chip is MP2122;

[0053] A DCDC boost dual-output chip, and the model of the DCDC boost dual-output chip is TPS65131;

[0054] Fixed +5V output LDO chip and fixed -5V output LDO chip. The models of the fixed +5V output LDO chips are SGM2211-5.0, and the model of the fixed -5V output LDO chip is SGM2209-5.0;

[0055] Fixed +3.3V output LDO chip. The model of the fixed +3.3V output LDO chip is SGM2211-3.3;

[0056] Output 48V phantom power DCDC boost BOOST chip. The model of the output 48V phantom power DCDC boost BOOST chip is TPS61170.

[0057] As ​ 、 ​ and ​ shown, as a preferred embodiment, on the basis of the above method, further, the microprocessor consists of a USB audio decoding chip and an IO expansion chip. The model of the IO expansion chip is AW9523B.

[0058] As ​ shown, as a preferred embodiment, on the basis of the above method, further, the digital interface input and output module has digital-to-analog and analog-to-digital decoding conversion and MIDI digital signal input and output. The digital-to-analog and analog-to-digital decoding conversion uses a CS4272 model chip. The MIDI digital signal input and output consists of an optocoupler and two buffers. The model of the optocoupler is 6N137S-TA1-L, and the model of the buffer is SN74AUP1G126DBV.

[0059] As ​ and ​ shown, as a preferred embodiment, on the basis of the above method, further, two microphone XLR balanced head input voice signals and two 6.35mm musical instrument analog signal inputs have an input amplification module. The input amplification module consists of four operational amplifiers. The model of the operational amplifier is NJM4580E.

[0060] As ​ and ​ shown, as a preferred embodiment, on the basis of the above method, further, the headphone monitoring interface has a monitoring headphone amplifier output. The connection output between the monitoring headphone amplifier output and the active speaker device has an output amplification module. The output amplification module consists of two operational amplifiers. The model of the operational amplifier is NJM4580E. The user inserts a microphone into the COMBO female socket to input a voice signal through the operational amplifier NJM4580E. The actual circuit is a non-inverting amplifier. After the signal is amplified by the non-inverting amplifier, it is then adjusted by an analog potentiometer to regulate the signal transmission amplitude, and then input to the CODEC chip through NJM4580E.

[0061] As ​ shown, as a preferred embodiment, on the basis of the above method, further, the model of the USB audio decoding chip is XU316-1024-QF60B-PP24, and the USB audio decoding chip supports UAC 2.0 protocol, ASIO, Windows, Linux, Android, MAC OS, IOS, and audio interfaces;

[0062] The model of the USB audio decoding chip is XU316-1024-QF60B-PP24. The device is connected to the host operating system end through USB, and is effectively enumerated at the host operating system end through the USB UAC2.0 protocol, receives audio data packets from the USB HOST, such as a PC or a mobile phone, and then synchronizes the data to the XU316 chip based on the local audio clock, and then completes digital-to-analog conversion through the CEDEC chip and outputs it to the headphones or other audio interfaces; other audio interfaces include I2S in&out, S / PDIF in&out, MIDI in&out, TDM-8, and support audio sampling rates PCM: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz, and support audio algorithms Mixer and EQ.

[0063] As ​ 、 ​ 、 ​ and ​ shown, as a preferred embodiment, on the basis of the above method, further, the power supply module includes +5V, DD_3.3V for powering the CODEC, ±5V for powering the operational amplifier, VDD_1.8V, and VDD_0.9V for powering the pure digital decoding main control XU316. VDD_1.8V and VDD_0.9V are output from MP2122 through USB5V input and output two paths respectively as VDD_0.9V and VDD_1.8V. The power supply +5V and VDD_3.3V are input from USB5V to TPS65131 and boosted to ±6V. +6V is reduced to +5V through the LDO chip SGM2211-5.0V, and -6V is reduced to -5V through the LDO chip SGM2209-5.0.

[0064] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should all be covered within the scope of the claims of the present invention.

Claims

1. A sound card system for realizing network live broadcast, characterized in that It includes a power supply module, an analog interface input module, an analog interface output module, a digital interface input / output module, a microprocessor, and a digital audio decoding module; The analog interface input module includes two composite COMBO input female sockets, and each composite COMBO input female socket is connected to a microphone XLR balanced head to input a voice signal and a 6.35mm musical instrument analog signal; The analog interface output module includes a stereo 6.35mm headphone monitoring interface and two 6.35mm interfaces for the left and right channels, and the two 6.35mm interfaces for the left and right channels are connected to active speaker devices for output; The digital interface input / output module includes a MIDI digital signal input female socket interface and a MIDI digital signal output female socket interface; The digital audio decoding module includes a pure digital decoding main control XU316 and an integrated ADC and DAC audio signal conversion CODEC chip; The power supply module includes: an integrated OVP and OCP chip, and the model of the integrated OVP and OCP chip is P14C5N; A dual-output DCDC buck chip, and the model of the dual-output DCDC buck chip is MP2122; A DCDC boost dual-output chip, and the model of the DCDC boost dual-output chip is TPS65131; A fixed +5V output LDO chip and a fixed -5V output LDO chip, the model of the fixed +5V output LDO chip is SGM2211-5.0, and the model of the fixed -5V output LDO chip is SGM2209-5.0; A fixed +3.3V output LDO chip, and the model of the fixed +3.3V output LDO chip is SGM2211-3.3; An output 48V phantom power DCDC boost chip, and the model of the output 48V phantom power DCDC boost chip is TPS61170.

2. The sound card system for realizing network live broadcast according to claim 1, characterized in that, The microprocessor is composed of a USB audio decoding chip and an IO expansion chip, and the model of the IO expansion chip is AW9523B.

3. The sound card system for realizing network live broadcast according to claim 2, wherein, The digital interface input / output module has digital-to-analog and analog-to-digital decoding conversion and MIDI digital signal input / output. The digital-to-analog and analog-to-digital decoding conversion uses a CS4272 model chip. The MIDI digital signal input / output is composed of an optocoupler and two buffers. The model of the optocoupler is 6N137S-TA1-L, and the model of the buffer is SN74AUP1G126DBV.

4. The sound card system for realizing network live broadcast according to claim 3, characterized in that, The two microphone XLR balanced head input voice signals and the two 6.35mm musical instrument analog signal inputs have an input amplification module, and the input amplification module is composed of four operational amplifiers. The model of the operational amplifier is NJM4580E.

5. The sound card system for implementing network live broadcast according to claim 4, wherein, The headphone monitoring interface has a monitoring headphone amplifier output, and the connection output between the monitoring headphone amplifier output and the active speaker device has an output amplification module. The output amplification module is composed of two operational amplifiers. The model of the operational amplifier is NJM4580E.

6. The sound card system for realizing network live broadcast according to claim 5, wherein The USB audio decoding chip supports UAC 2.0 protocol, ASIO, Windows, Linux, Android, MAC OS, and IOS.

7. An audio card system for implementing network live broadcast according to claim 6, wherein, The power supply module includes +5V, VDD_3.3V for powering the CODEC chip, ±5V for powering the operational amplifier, VDD_1.8V, and VDD_0.9V for powering the pure digital decoding main control XU316.

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