CN107547986B - External wireless live broadcast sound card and audio processing method thereof - Google Patents
External wireless live broadcast sound card and audio processing method thereof Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an external wireless live broadcast sound card and an audio processing method thereof, wherein the external wireless live broadcast sound card is connected with an intelligent equipment terminal and comprises a pickup device, a sound card main machine and a sound card auxiliary machine; the pick-up device collects a first audio signal of a user and wirelessly transmits the first audio signal to the sound card host; the sound card host receives a second audio signal wirelessly transmitted by the intelligent equipment terminal, and outputs a recording signal after encoding and decoding and mixing and amplifying the first audio signal and the second audio signal, and the recording signal is wirelessly transmitted to the sound card auxiliary machine; the sound card auxiliary machine decodes the recording signal and then transmits the recording signal to the intelligent equipment terminal for recording or live broadcasting; and the sound card auxiliary machine sends a third audio signal in the intelligent equipment terminal to the sound card host machine, and the sound card host machine decodes and amplifies the third audio signal and then monitors the sound effect. Because pickup device, sound card host computer and sound card auxiliary machine do not pass through the connecting wire and connect, can put at will when the user uses to solve the distance restriction of current line sound card, often plug and swing and appear contacting failure or the problem of plug wearing and tearing.
Description
Technical Field
The invention relates to the technical field of intelligent equipment terminals, in particular to an external wireless live broadcast sound card and an audio processing method thereof.
Background
The common live broadcast sound card in the current market mainly connects the sound pickup signal and the processed signal to each live broadcast intelligent equipment terminal through a complicated connecting wire in a wired mode. The convenience of use is influenced by excessive connecting wires, the distance is limited, and the area of the tabletop is occupied. Meanwhile, the wire plug is frequently plugged and unplugged, poor contact or plug abrasion is easy to occur, the live broadcast effect or the service life of the connecting wire is influenced, the connecting wire is purchased again, and the cost of a user is increased.
Accordingly, there is a need for improvements over the prior art.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide an external wireless live broadcast sound card and an audio processing method thereof, so as to solve the problems that the existing wired sound card has distance limitation, and poor contact or plug abrasion occurs due to frequent plugging and unplugging.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an external wireless live sound card is connected with an intelligent equipment terminal and comprises a sound pickup device, a sound card main machine and a sound card auxiliary machine;
the pick-up device collects first audio signals of a user and wirelessly transmits the first audio signals to the sound card host; the sound card host receives a second audio signal wirelessly transmitted by the intelligent equipment terminal, and outputs a recording signal after encoding and decoding and mixing and amplifying the first audio signal and the second audio signal, and the recording signal is wirelessly transmitted to the sound card auxiliary machine; the sound card auxiliary machine decodes the recording signal and then transmits the recording signal to the intelligent equipment terminal for recording or live broadcasting; and the sound card auxiliary machine sends a third audio signal in the intelligent equipment terminal to the sound card host machine, and the sound card host machine decodes and amplifies the third audio signal and then monitors the sound effect.
In the external wireless live broadcast sound card, the sound pickup device comprises a sound pickup, a wireless transmitting module and a first antenna;
the sound pick-up is used for collecting human voice and environmental sound, outputting corresponding first audio signals and transmitting the corresponding first audio signals to the sound card host through the wireless transmitting module and the first antenna.
In the external wireless live sound card, the sound card host comprises a receiving module, a processing module, a first bidirectional transmission wireless module and a first receiving and transmitting antenna;
the receiving module is used for receiving a first audio signal transmitted by the first antenna and a second audio signal transmitted by the intelligent equipment terminal in a wireless mode, and transmitting the first audio signal and the second audio signal to the processing module after operational amplification; the processing module encodes and decodes the first audio signal and the second audio signal, mixes the audio signals and outputs a recording signal; the first bidirectional transmission wireless module wirelessly transmits the recording signal to the sound card auxiliary machine through the first receiving and transmitting antenna; the first bidirectional transmission wireless module also receives a third audio signal sent by the sound card auxiliary machine through the first receiving and transmitting antenna, and the processing module decodes and amplifies the third audio signal and then monitors sound effects.
In the external wireless live broadcast sound card, the receiving module comprises a second antenna, a third antenna, a wireless receiving circuit, a Bluetooth receiving circuit, a first operational amplifier and a second operational amplifier;
the second antenna is used for receiving the first audio signal transmitted by the first antenna; the wireless receiving circuit transmits the first audio signal to the first operational amplifier for operational amplification and then outputs the first audio signal to the processing module; and the Bluetooth receiving circuit transmits the second audio signal received by the third antenna to the second operational amplifier for operational amplification and then outputs the second audio signal to the processing module.
In the external wireless live broadcast sound card, the processing module comprises a first processor, a second processor and an output processing unit;
the second processor performs signal processing on a second audio signal; the first processor encodes and decodes the first audio signal and the processed second audio signal, mixes the audio signals and generates a mixed audio signal; the first processor outputs the mixed sound signal to the output processing unit in two paths; the output processing unit outputs a recording signal to the first bidirectional transmission wireless module after operational amplification of the first path of mixed sound signal, and outputs a low-impedance audio signal for monitoring after power amplification of the second path of mixed sound signal.
In the external wireless live broadcast sound card, the output processing unit comprises a third operational amplifier, a fourth operational amplifier, a power amplifier, a first recording output port, a first audio input port and an audio output port;
the third operational amplifier is used for carrying out operational amplification on the first path of mixed sound signals to obtain high impedance, and outputting recording signals through a first recording output port; the first bidirectional transmission wireless module transmits the recording signal to the sound card auxiliary machine through a first receiving and transmitting antenna; and after the power amplifier performs power amplification on the second path of mixed sound signal, generating a low-impedance audio signal and outputting the low-impedance audio signal from the audio output port.
In the external wireless live sound card, the sound card auxiliary machine comprises a second bidirectional transmission wireless module, a second recording output port, a second audio input port, an audio monitoring port and a second receiving and transmitting antenna;
the second receiving and transmitting antenna receives the recording signal sent by the first receiving and transmitting antenna and transmits the recording signal to the second bidirectional transmission wireless module; after the second bidirectional transmission wireless module decodes the recording signal, the recording signal is output to the intelligent equipment terminal through a second recording output port for recording or live broadcasting; the second audio input port transmits a third audio signal output by the intelligent equipment terminal to the second bidirectional transmission wireless module; the second bidirectional transmission wireless module outputs the third audio signal in two paths, one path is transmitted to the sound card host through the second receiving and transmitting antenna, and the other path is directly output through the audio monitoring port to monitor the sound effect.
In the external wireless live broadcast sound card, the processing module further comprises a control panel and a special effect memory;
the control panel selectively invokes the special effect audio data signals in the special effect memory according to the operation of a user, the second processor decodes and codes the special effect audio data signals and then transmits the coded special effect audio data signals to the first processor, and the first processor mixes the special effect audio data signals with the input first audio signals and the second audio signals.
In the external wireless live broadcast sound card, the processing module further comprises an indication component used for displaying the audio input/output level high/low state and the battery power.
An audio processing method adopting the external wireless live broadcast sound card comprises the following steps:
step A, a pickup device collects a first audio signal of a user and wirelessly transmits the first audio signal to a sound card host;
b, the sound card host receives a second audio signal sent by the intelligent equipment terminal in a wireless mode, and outputs a recording signal to the sound card auxiliary machine in a wireless mode after encoding and decoding and mixing and amplifying the first audio signal and the second audio signal;
step C, the sound card auxiliary machine decodes the recording signals and then transmits the decoded recording signals to the intelligent equipment terminal for recording or live broadcasting;
and D, the sound card auxiliary machine sends a third audio signal in the intelligent equipment terminal to the sound card host machine, and the sound card host machine decodes and amplifies the third audio signal and then monitors sound effects.
Compared with the prior art, the external wireless live broadcast sound card and the audio processing method thereof provided by the invention have the advantages that the external wireless live broadcast sound card is connected with the intelligent equipment terminal and comprises a pickup device, a sound card main machine and a sound card auxiliary machine; the pick-up device collects a first audio signal of a user and wirelessly transmits the first audio signal to the sound card host; the sound card host receives a second audio signal wirelessly transmitted by the intelligent equipment terminal, and outputs a recording signal after encoding and decoding and mixing and amplifying the first audio signal and the second audio signal, and the recording signal is wirelessly transmitted to the sound card auxiliary machine; the sound card auxiliary machine decodes the recording signal and then transmits the recording signal to the intelligent equipment terminal for recording or live broadcasting; and the sound card auxiliary machine sends a third audio signal in the intelligent equipment terminal to the sound card host machine, and the sound card host machine decodes and amplifies the third audio signal and then monitors the sound effect. Because pickup device, sound card host computer and sound card auxiliary machine do not pass through the connecting wire and connect, can put at will when the user uses to solve the distance restriction of current line sound card, often plug and swing and appear contacting failure or the problem of plug wearing and tearing.
Drawings
Fig. 1 is a block diagram of an external wireless live sound card according to an embodiment of the present invention.
Fig. 2 is a block diagram of a sound pickup device and a sound card host in an external wireless live sound card according to an embodiment of the present invention.
Fig. 3 is a block diagram of a sound card auxiliary unit in an external wireless live sound card according to an embodiment of the present invention.
Fig. 4 is a flowchart of an audio processing method of an external wireless live sound card according to an embodiment of the present invention.
Detailed Description
The invention provides an external wireless live broadcast sound card and an audio processing method thereof, which are suitable for intelligent equipment terminals such as personal portable mobile phones, tablets, computers and the like; the sound card main body is in wireless connection with the auxiliary machine through a wireless audio transmission mode, the auxiliary machine is connected with the intelligent terminal equipment, and the wireless connection between the sound card main body and the intelligent terminal equipment (such as a mobile phone, a tablet computer, a computer and the like) is indirectly realized; to avoid distance limitation and poor contact problems of the cable sound card. In order to make the objects, technical solutions and effects of the present invention clearer and more specific, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the external wireless live broadcast sound card provided by the invention comprises a sound pickup device 10, a sound card host 20 and a sound card auxiliary machine 30, wherein the sound card host is wirelessly connected with the sound pickup device 10 and the sound card auxiliary machine 30, and the sound card auxiliary machine is connected with an intelligent equipment terminal. In particular, the sound pickup apparatus 10, the sound card main unit 20, and the sound card sub-unit 30 are independent devices. The pickup device 10 can be worn on the chest of a user or held by the user, the sound card auxiliary unit 30 is connected with the intelligent device terminal in an inserting way through an interface, and the sound card main unit 20 can be placed on the desktop of the user accessory. The sound pickup apparatus 10 collects a first audio signal of a user and wirelessly transmits the first audio signal to the sound card host 20; the sound card host 20 receives the second audio signal wirelessly transmitted by the intelligent device terminal, and outputs a recording signal after encoding and decoding and mixing and amplifying the first audio signal and the second audio signal, and wirelessly transmits the recording signal to the sound card auxiliary machine 30; the sound card auxiliary machine 30 decodes the recording signal and then transmits the decoded recording signal to the intelligent equipment terminal for recording or live broadcasting. The sound card auxiliary machine 30 also transmits a third audio signal in the intelligent device terminal to the sound card host machine 20, and the sound card host machine 20 decodes and amplifies the third audio signal and then monitors sound effects. Because the pickup device 10, the sound card main unit 20 and the sound card auxiliary unit 30 are not connected through connecting wires, a user is not limited by the length of the connecting wires and does not occupy the area of a desk surface when using the device; the problem of current line sound card's distance restriction, contact failure or plug wearing and tearing appear often plug and swing is solved.
Referring to fig. 2, in the present embodiment, the sound pickup apparatus 10 includes a sound pickup 110, a wireless transmitting module 120, and a first antenna 130; the pickup 110, the wireless transmitting module 120, and the first antenna 130 are sequentially connected, and the first antenna 130 is wirelessly connected with the sound card host 20. The sound pick-up 110 is used for collecting human voice and environmental sound, outputting corresponding first audio signals, and transmitting the first audio signals to the sound card host 20 through the wireless transmitting module 120 and the first antenna 130. Preferably, the wireless transmitting module 120 uses 2.4G wireless technology for transmitting, and the wireless transmitting module 120 may be a 2.4G wireless transmitting module (model, such as JF 24D-TX). The first antenna 130 corresponds to a transmitting antenna. The sound pickup 110 implements a wireless microphone (receiving human voice and external sound) function through 2.4G.
The sound card host 20 includes a receiving module 210, a processing module 220, a first bidirectional transmitting wireless module 230 (with a 2.4G bidirectional synchronous audio transmitting wireless transceiving function), and a first transceiving antenna 240; the receiving module 210 is connected with the sound pickup device 10 in a wireless manner and connected with an intelligent equipment terminal Bluetooth; the processing module 220 is connected to the receiving module 210 and the first bidirectional transmitting wireless module 230, and the first bidirectional transmitting wireless module 230 is wirelessly connected to the sound card auxiliary machine 30 through the first transceiver antenna 240. The receiving module 210 is configured to receive a first audio signal transmitted by the first antenna 130 and a second audio signal wirelessly transmitted by the smart device terminal, and transmit the first audio signal and the second audio signal to the processing module 220 after operational amplification. The processing module 220 encodes and decodes the first audio signal and the second audio signal, mixes the audio signals, and outputs a recording signal. The first bidirectional transmission wireless module 230 wirelessly transmits the recording signal to the sound card auxiliary machine 30 through the first transceiver antenna 240. The first bidirectional transmission wireless module 230 receives the third audio signal sent by the sound card auxiliary unit 30 through the first transceiver antenna 240, and the processing module 220 decodes and amplifies the third audio signal and then monitors the sound effect.
The receiving module 210 includes a second antenna 211, a third antenna 212, a wireless receiving circuit 213, a bluetooth receiving circuit 214, a first operational amplifier 215 (operational amplifier), and a second operational amplifier 216; the second antenna 211 is connected with the first antenna 130 in a wireless way, the wireless receiving circuit 213 is connected with the second antenna 211 and the first operational amplifier 215, the Bluetooth receiving circuit 214 is connected with the third antenna 212 and the second operational amplifier 216, and the first operational amplifier 215 and the second operational amplifier 216 are both connected with the processing module 220.
The second antenna 211 is a receiving antenna paired with the first antenna 130, and is configured to receive the first audio signal transmitted by the first antenna 130. The wireless receiving circuit 213 correspondingly adopts a 2.4G wireless technology, and transmits the first audio signal received by the second antenna 211 to the first operational amplifier 215, and the first operational amplifier 215 performs operational amplification on the first audio signal and outputs the first audio signal to the processing module 220. The bluetooth receiving circuit 214 (may use a bluetooth wireless audio transmission module) transmits the second audio signal (sent by bluetooth of the smart device terminal) received by the third antenna 212 to the second operational amplifier 216, and the second operational amplifier 216 performs operational amplification on the second audio signal and outputs the second audio signal to the processing module 220.
The processing module 220 includes a first processor 221, a second processor 222, and an output processing unit 223; the first processor 221 is connected to the first operational amplifier 215, the second processor 222 and the output processing unit 223, and the second processor 222 is connected to the second operational amplifier 216. The first processor 221 and the second processor 222 each employ DSP (Digital Signal Processing) processors. The second processor 222 mainly performs signal processing on the second audio signal (e.g., mixing the accompaniment signal with the effect sound). The first processor 221 encodes and decodes the first audio signal and the processed second audio signal, mixes them, and generates a mixed signal. The MCU of the first processor 221 core outputs the generated mix signal to the output processing unit 223 in two ways. The output processing unit 223 performs operational amplification on the first path of audio mixing signal, and outputs a recording signal to the first bidirectional transmission wireless module 230, and performs power amplification on the second path of audio mixing signal, and outputs a low-impedance audio signal for monitoring.
The output processing unit 223 includes a third operational amplifier 2231, a fourth operational amplifier 2232, a power amplifier (power amplifier) 2233, a first recording output port 2234, a first audio input port 2235, and an audio output port 2236; the third operational amplifier 2231 is connected to the first processor 221 and the first audio output port 2234, the fourth operational amplifier 2232 is connected to the first audio input port 2235 and the power amplifier 2233, the power amplifier 2233 is connected to the first processor 221 and the audio output port 2236, and the first audio output port 2234 and the first audio input port 2235 are both connected to the first bidirectional transmission wireless module 230.
The first path of the mixed audio signal is operational amplified with high impedance by the third operational amplifier 223 and outputs a recording signal through the first recording output port 2234. The first bidirectional transmitting wireless module 230 transmits the recording signal to the sound card auxiliary machine 30 through the first transceiver antenna 240. After the second path of mixed audio signal is subjected to power amplification through the power amplifier 2233, a low-impedance audio signal is generated and output from the audio output port 2236; the second path is used as a wired standby port to output a monitoring signal so as to realize the function of compatible wired and wireless.
Referring to fig. 3, the sound card auxiliary unit 30 includes a second bidirectional transmission wireless module 310, a second recording output port 320, a second audio input port 330 (an interface for connecting the smart device terminal to output an audio signal), an audio monitor port 340, and a second transceiver antenna 350. The second bidirectional transmission wireless module 310 is connected to the second recording output port 320, the second audio input port 330, the audio monitor port 340 and the second transceiver antenna 350; the second recording output port 320 and the second audio input port 330 are both connected to the smart device terminal.
The second transceiver antenna 350 receives the recording signal sent by the first transceiver antenna 240 and transmits the recording signal to the second bidirectional transmitting wireless module 310. After the second bidirectional transmission wireless module 310 decodes the recording signal, the recording signal is output to the intelligent device terminal through the second recording output port 320 for recording or live broadcasting. The second audio input port 330 transmits a third audio signal in the smart device terminal to the second bidirectional transmission wireless module 310 to be output in two ways; one path is transmitted to the first transceiver antenna 240 of the sound card host through the second transceiver antenna 350, and the other path directly outputs the monitoring sound effect through the audio monitoring port 340.
In a further embodiment, the processing module 220 further includes a control panel 224 and an effect memory 225; the control panel 224 is connected to the first processor 221, and the special effect memory 225 is connected to the second processor 222. The user selects and retrieves the special effect audio data signal in the special effect memory 225 on the control panel 224 according to the usage scenario and the requirement (specifically, the control panel controls the second processor to read the special effect audio data signal in the special effect memory through the MCU circuit in the first processor), decodes and encodes the special effect audio data signal through the second processor 222, mixes the special effect audio data signal with the first audio signal and the second audio signal through the first processor 221, and then performs the same signal processing as the mixed audio signal, so as to achieve the effect of atmosphere adjustment.
In a further embodiment, the control panel 224 may further perform operations according to a predefined function of a user to implement functions of audio input size adjustment, audio output size adjustment, sound effect selection, special effect sound effect selection, and the like, so as to control the mixing signal in the first processor 221 correspondingly. In specific implementation, the user controls the electronic volume in the first processor to perform various audio controls by pressing a key (or a control icon) on the operation panel and inputting a corresponding control instruction. The first processor is used as a main controller to coordinate the first processor and the second processor to perform coordination work.
In a further embodiment, the processing module 220 further comprises an indication component 226, the indication component 226 being coupled to the first processor 221. The indicating component 226 includes a level indicating component and a power indicating component. The level indicating component is configured to display an audio input/output level high/low state obtained by the operation of the first processor 221 on the decoded audio signal. The electric quantity indicating component is used for displaying the electric quantity of the battery in real time.
With continued reference to fig. 1 and fig. 2, taking the user as a host, the external wireless live broadcast sound card and the mobile phone live broadcast are taken as examples, and the working principle is as follows:
the sound of the anchor and the surrounding environmental sound are collected by the sound pickup 110, and the output first audio signal is transmitted from the first antenna 130 to the second antenna 211 via the wireless transmission module 120 (2.4G). The first audio signal is received by the wireless receiving circuit 212 (2.4G) through the second antenna 211, amplified by the first op-amp 215, and input to the first processor 221.
The bluetooth receiving circuit 214 receives a second audio signal (such as an accompaniment signal) sent by the mobile phone through bluetooth, and sends the second audio signal (such as an accompaniment signal) to the second processor 222 for signal processing after being amplified by the second op amp 216. The processed second audio signal is transmitted to the first processor 221 through an I2C (Inter-Integrated Circuit) bus, and is encoded, decoded, and mixed with the first audio signal to be output in two ways.
The first mixed signal is subjected to operational amplification in the third operational amplifier 2231, and then the recording signal is output through the first recording output port 2234. The first bi-directional transmitting wireless module 230 transmits the recorded audio signal through the first transceiving antenna 240. The second bidirectional transmitting radio module 310 of the sound card auxiliary machine 30 receives the recording signal through the second transceiver antenna 350 and decodes the recording signal. The second recording output port 320 outputs the decoded recording signal to the intelligent device terminal for recording or live broadcasting.
After the second mixed audio signal is amplified by the power amplifier 2233, a low-impedance audio signal is generated and output from the audio output port 2236 for wireless monitoring of the sound quality effect.
The third audio signal (such as the voice of the live customer in the mobile phone) is transmitted to the second bidirectional transmitting wireless module 310 through the second audio input port 330 and then output in two paths. One path is transmitted through the second transceiver antenna 350, and the first transceiver antenna 240 receives and transmits the signal to the first bidirectional transmission wireless module 230 for decoding; the audio signal is transmitted to the fourth operational amplifier 2232 through the first audio input port 2235, and then enters the power amplifier 2233 for power amplification, and then is output from the audio output port 2236 for audio monitoring. The other path directly outputs the listening sound effect through the audio listening port 340.
Finally, the bidirectional wireless and full-wireless functions between the external wireless live broadcast sound card and the pickup device, between the external wireless live broadcast sound card and accompaniment input and between the external wireless live broadcast sound card and the auxiliary machine (equivalent to an intelligent equipment terminal) are realized.
Based on the external wireless live sound card, the invention also provides an audio processing method of the external wireless live sound card, referring to fig. 4, the audio processing method comprises the following steps:
s10, the pickup device collects first audio signals of a user and wirelessly transmits the first audio signals to the sound card host;
s20, the sound card host receives a second audio signal which is wirelessly transmitted by the intelligent equipment terminal, and outputs a recording signal and wirelessly transmits the recording signal to the sound card auxiliary machine after encoding and decoding and mixing and amplifying the first audio signal and the second audio signal;
s30, the sound card auxiliary machine decodes the recording signals and then transmits the decoded recording signals to the intelligent equipment terminal for recording or live broadcasting.
And S40, the sound card auxiliary machine sends a third audio signal in the intelligent equipment terminal to the sound card host machine, and the sound card host machine decodes and amplifies the third audio signal and then monitors sound effects.
In summary, the external wireless live sound card and the audio processing method thereof provided by the invention can collect human voice and environmental sound, realize the input of wireless accompaniment through Bluetooth, and mix the wireless accompaniment with the human voice and special effect sound; the wireless connection of the sound card host and the sound card auxiliary machine is realized by a wireless synchronous bidirectional 2.4G lossless audio transmission mode, and the auxiliary machine is connected with the intelligent terminal equipment to indirectly connect the sound card host with the intelligent terminal equipment (such as a mobile phone, a tablet computer, a computer and the like).
The wireless connection mode releases the constraint of the connecting wire, so that a user can perform dance live broadcast; the defect that the existing wired sound card experience cannot carry out talent dance live broadcast performance due to wired stumbling is avoided, the self defect of a user is fully displayed, and the user can conveniently realize synchronous wireless monitoring effect of the dance and interactive experience of vermicelli conversations of an internet terminal. The wireless connection of the user and the mobile phone is convenient, the direct broadcast, the wireless monitoring and the wireless interesting special effect are realized, the sound effect is enriched, and the common sound effect is switched by one key and shortcut key; the number of people with double chips and the special effect sound of background sound are processed by the independent channel technology to realize the advanced functions such as evasion. And (5) adjusting sound effects of pure hardware. Because the external wireless live sound card integrates a processor (MCU+DSP), an operational amplifier, a power amplifier, ports, transceiver circuits and the like into a whole (namely, is integrated on a circuit board), the external wireless live sound card reduces connecting lines, has portability, microminiaturization, high integration level and low power consumption, realizes low power consumption and is more suitable for miniaturized products.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (8)
1. An external wireless live sound card is connected with an intelligent equipment terminal and is characterized by comprising a sound pickup device, a sound card main machine and a sound card auxiliary machine;
the pick-up device collects first audio signals of a user and wirelessly transmits the first audio signals to the sound card host; the sound card host receives a second audio signal wirelessly transmitted by the intelligent equipment terminal, and outputs a recording signal after encoding and decoding and mixing and amplifying the first audio signal and the second audio signal, and the recording signal is wirelessly transmitted to the sound card auxiliary machine; the sound card auxiliary machine decodes the recording signal and then transmits the recording signal to the intelligent equipment terminal for recording or live broadcasting; the sound card auxiliary machine sends a third audio signal in the intelligent equipment terminal to the sound card host machine, and the sound card host machine decodes and amplifies the third audio signal and then monitors sound effects;
the pickup device comprises a pickup, a wireless transmitting module and a first antenna;
the sound pick-up is used for collecting human voice and environmental sound, outputting corresponding first audio signals and transmitting the corresponding first audio signals to the sound card host through the wireless transmitting module and the first antenna;
the sound card host comprises a receiving module, a processing module, a first bidirectional transmission wireless module and a first receiving and transmitting antenna;
the receiving module is used for receiving a first audio signal transmitted by the first antenna and a second audio signal transmitted by the intelligent equipment terminal in a wireless mode, and transmitting the first audio signal and the second audio signal to the processing module after operational amplification; the processing module encodes and decodes the first audio signal and the second audio signal, mixes the audio signals and outputs a recording signal; the first bidirectional transmission wireless module wirelessly transmits the recording signal to the sound card auxiliary machine through the first receiving and transmitting antenna; the first bidirectional transmission wireless module also receives a third audio signal sent by the sound card auxiliary machine through the first receiving and transmitting antenna, and the processing module decodes and amplifies the third audio signal and then monitors sound effects.
2. The external wireless live sound card of claim 1, wherein the receiving module comprises a second antenna, a third antenna, a wireless receiving circuit, a bluetooth receiving circuit, a first op-amp and a second op-amp;
the second antenna is used for receiving the first audio signal transmitted by the first antenna; the wireless receiving circuit transmits the first audio signal to the first operational amplifier for operational amplification and then outputs the first audio signal to the processing module; and the Bluetooth receiving circuit transmits the second audio signal received by the third antenna to the second operational amplifier for operational amplification and then outputs the second audio signal to the processing module.
3. The external wireless live sound card of claim 2, wherein the processing module comprises a first processor, a second processor, and an output processing unit;
the second processor performs signal processing on a second audio signal; the first processor encodes and decodes the first audio signal and the processed second audio signal, mixes the audio signals and generates a mixed audio signal; the first processor outputs the mixed sound signal to the output processing unit in two paths; the output processing unit outputs a recording signal to the first bidirectional transmission wireless module after operational amplification of the first path of mixed sound signal, and outputs a low-impedance audio signal for monitoring after power amplification of the second path of mixed sound signal.
4. The external wireless live sound card of claim 3, wherein the output processing unit comprises a third operational amplifier, a fourth operational amplifier, a power amplifier, a first recording output port, a first audio input port and an audio output port;
the third operational amplifier performs operational amplification on the first path of mixed sound signal and outputs a recording signal through a first recording output port; the first bidirectional transmission wireless module transmits the recording signal to the sound card auxiliary machine through a first receiving and transmitting antenna;
the fourth operational amplifier is connected with the first audio input port and the power amplifier, and the power amplifier generates a low-impedance audio signal to be output from the audio output port after amplifying the power of the second path of mixed audio signal.
5. The external wireless live sound card of claim 4, wherein the sound card auxiliary unit comprises a second bidirectional transmission wireless module, a second recording output port, a second audio input port, an audio listening port and a second transceiver antenna;
the second receiving and transmitting antenna receives the recording signal sent by the first receiving and transmitting antenna and transmits the recording signal to the second bidirectional transmission wireless module; after the second bidirectional transmission wireless module decodes the recording signal, the recording signal is output to the intelligent equipment terminal through a second recording output port for recording or live broadcasting; the second audio input port transmits a third audio signal output by the intelligent equipment terminal to the second bidirectional transmission wireless module; the second bidirectional transmission wireless module outputs the third audio signal in two paths, one path is transmitted to the sound card host through the second receiving and transmitting antenna, and the other path is directly output through the audio monitoring port to monitor the sound effect.
6. The external wireless live sound card of claim 3, wherein the processing module further comprises a control panel and a special effects memory;
the control panel selectively invokes the special effect audio data signals in the special effect memory according to the operation of a user, the second processor decodes and codes the special effect audio data signals and then transmits the coded special effect audio data signals to the first processor, and the first processor mixes the special effect audio data signals with the input first audio signals and the second audio signals.
7. The external wireless live sound card of claim 4, wherein the processing module further comprises an indication component for displaying audio input output level high and low status and battery level.
8. An audio processing method using the external wireless live sound card of claim 1, comprising:
step A, a pickup device collects a first audio signal of a user and wirelessly transmits the first audio signal to a sound card host;
b, the sound card host receives a second audio signal sent by the intelligent equipment terminal in a wireless mode, and outputs a recording signal to the sound card auxiliary machine in a wireless mode after encoding and decoding and mixing and amplifying the first audio signal and the second audio signal;
step C, the sound card auxiliary machine decodes the recording signals and then transmits the decoded recording signals to the intelligent equipment terminal for recording or live broadcasting;
and D, the sound card auxiliary machine sends a third audio signal in the intelligent equipment terminal to the sound card host machine, and the sound card host machine decodes and amplifies the third audio signal and then monitors sound effects.
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| CN108540145A (en) * | 2018-03-16 | 2018-09-14 | 中山市君晟电子科技有限公司 | A kind of wireless live broadcast pairing converting system |
| CN109672946B (en) * | 2019-02-15 | 2023-12-15 | 深圳市昊一源科技有限公司 | Wireless communication system, forwarding equipment, terminal equipment and forwarding method |
| CN112714346A (en) * | 2020-12-28 | 2021-04-27 | 江西创成微电子有限公司 | Live broadcast system and audio signal transmission system and equipment thereof |
| CN113784157B (en) * | 2021-08-31 | 2023-11-03 | 江西创成微电子有限公司 | Live broadcast audio signal processing method and sound card |
| CN116825058A (en) * | 2023-07-27 | 2023-09-29 | 恩平市特韵音响有限公司 | Drum set tuning and transmission system and method based on 2.4G wireless digital audio technology |
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