阅读说明：本技术 一种网络直播的乐器拾音系统 (Live musical instrument pickup system of network ) 是由 沈紫辉 罗坤辉 刘镇宇 王银龙 于 2019-11-28 设计创作，主要内容包括：本发明公开了涉及拾音系统技术领域的一种网络直播的乐器拾音系统,解决了不方便收录不同位置的音源、录音效果较差和不方便进行直播活动的问题。其技术要点是：包括DSP模块、收音模块、输出模块、电源模块和控制模块,所述收音模块包括内置话筒电路、外接话筒电路和传感器输入电路,所述输出模块包括数模转换器、手机直播连接电路、前级音频输出电路和耳机输出电路。能分别利用内置的驻极体话筒、外接话筒和拾音器分别从不同的位置采集音频信号,从而能够收录到更清晰的声音,提高录音效果,实现了能够方便的收录不同位置的音源、录音效果较好的优点,具有良好的商业应用前景,能够给人们的文娱生活带来较大的便利性。(The invention discloses a musical instrument pickup system for live webcasting, which relates to the technical field of pickup systems and solves the problems that sound sources at different positions are inconvenient to record, the recording effect is poor and live webcasting activities are inconvenient to perform. The technical key points are as follows: including DSP module, radio reception module, output module, power module and control module, the radio reception module includes built-in microphone circuit, external microphone circuit and sensor input circuit, output module includes digital analog converter, the live connecting circuit of cell-phone, preceding stage audio output circuit and earphone output circuit. Can utilize built-in electret microphone, external microphone and adapter to gather audio signal from the position of difference respectively to can receive and play more clear sound, improve the recording effect, realized the sound source of the different positions of collection that can be convenient, the better advantage of recording effect, have good commercial application prospect, can bring great convenience for people's recreational life.)

1. The utility model provides a live musical instrument pickup system of network, includes DSP module (11), radio module (21), output module (31) and power module (41), power module (41) and DSP module (11) electric connection, its characterized in that: radio module (21) including built-in microphone circuit (22), external microphone circuit (24) and sensor input circuit (26), built-in microphone circuit (22), external microphone circuit (24) and sensor input circuit (26) respectively with DSP module (11) electric connection, built-in microphone circuit (22) are equipped with electret microphone (23) rather than electric connection, external microphone circuit (24) are equipped with external microphone input seat (25), sensor input circuit (26) are equipped with pickup input interface (27), output module (31) include digital analog converter (32), the live connecting circuit of cell-phone (33), preceding stage audio output circuit (35) and earphone output circuit (37), digital analog converter (32) and earphone output circuit (37) respectively with DSP module (11) electric connection, the live connecting circuit of cell-phone (33) and preceding stage audio output circuit (35) respectively with digital analog converter (32), digital analog converter (32) and earphone output circuit (37) are connected with DSP module (11) electric connection ) Electric connection, live connecting circuit (33) of cell-phone is equipped with cell-phone connector (34), preceding stage audio output circuit (35) are equipped with power amplifier output interface (36), earphone output circuit (37) are equipped with earphone output interface (38).

2. The live streaming musical instrument pickup system as set forth in claim 1, wherein: still include control module (12), control module (12) and DSP module (11) electric connection, DSP module (11) electric connection has USB connection module (14).

3. The live streaming musical instrument pickup system as set forth in claim 2, wherein: the control module (12) is electrically connected with a key input circuit (16).

4. The live streaming musical instrument pickup system as set forth in claim 2, wherein: the DSP module (11) is electrically connected with a TF card connecting module (15).

5. The live streaming musical instrument pickup system as set forth in claim 2, wherein: the DSP module (11) is electrically connected with a Bluetooth connecting module (13).

6. The live streaming musical instrument pickup system as set forth in claim 1, wherein: built-in microphone circuit (22) are through external microphone circuit (24) and DSP module (11) electric connection, and external microphone circuit (24) block built-in microphone circuit (22) to DSP module (11) transmission signal when external microphone input seat (25) and external microphone switch-on.

7. The live streaming musical instrument pickup system as set forth in claim 1, wherein: the power module (41) comprises a lithium battery unit (43), a charging circuit (42), a 5V boosting circuit (45), a 12V boosting circuit (44) and a 3.3V voltage stabilizing circuit (46), wherein the lithium battery unit (43) is electrically connected with the charging circuit (42), the 5V boosting circuit (45), the 12V boosting circuit (44) and the 3.3V voltage stabilizing circuit (46), the 12V boosting circuit (44) is electrically connected with the sensor input circuit (26), the 5V boosting circuit (45) is electrically connected with the built-in microphone circuit (22), the digital-to-analog converter (32) and the control module (12) respectively, and the 3.3V voltage stabilizing circuit (46) is electrically connected with the DSP module (11).

Technical Field

The invention relates to the technical field of sound pickup systems, in particular to a live webcast musical instrument sound pickup system.

Background

With the rapid development of the internet, live webcasts gradually enter the visual field of people, and more anchor broadcasters show guitars and other talents to audiences in a live webcasting mode. At present, most of anchor broadcasters favor to use mobile phones for live broadcasting in the live broadcasting process, and microphones carried on the mobile phones are used for recording musical instrument sound and singing sound at the same time. Although the mobile phone has the advantages of small volume and convenient carrying, the mobile phone cannot record the sound source at a specific position in the live broadcasting process, and has poor recording effect, thereby bringing great inconvenience to the live broadcasting process.

For example, in the process of showing the talent skill of the guitar, the anchor needs to move the guitar beside the mobile phone to enable the mobile phone to record the sound clearly, and when the anchor performs a singing performance, the anchor needs to move both the guitar and the mouth beside the mobile phone, which is easy to cause inconvenience to the performance of the anchor, and at the same time, the activity range of the anchor is severely limited, resulting in great influence on the interactive effect in the live broadcasting process. Therefore, in the prior art, the problems that the live broadcast equipment is inconvenient to record sound sources at different positions, the recording effect is poor and the live broadcast activity is inconvenient exist.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a live webcast musical instrument pickup system which has the advantages of conveniently recording sound sources at different positions, having a good recording effect and being convenient for live webcast activities.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a musical instrument pickup system of network live broadcast comprises a DSP module, a radio module, an output module and a power module, wherein the power module is electrically connected with the DSP module, the radio module comprises a built-in microphone circuit, an external microphone circuit and a sensor input circuit, the built-in microphone circuit, the external microphone circuit and the sensor input circuit are respectively electrically connected with the DSP module, the built-in microphone circuit is provided with an electret microphone which is electrically connected with the built-in microphone circuit, the external microphone circuit is provided with an external microphone input seat, the sensor input circuit is provided with an pickup input interface, the output module comprises a digital-analog converter, a mobile phone live broadcast connecting circuit, a preceding stage audio output circuit and an earphone output circuit, the digital-analog converter and the earphone output circuit are respectively electrically connected with the DSP module, the mobile phone live broadcast connecting circuit and the preceding stage audio output circuit are respectively electrically connected with the digital-analog converter, the mobile phone live broadcast connecting circuit is provided with a mobile phone connecting port, the preceding-stage audio output circuit is provided with a power amplifier output interface, and the earphone output circuit is provided with an earphone output interface.

As a further improvement of the invention: still include control module, control module and DSP module electric connection, DSP module electric connection has USB connection module.

As a further improvement of the invention: the control module is electrically connected with a key input circuit.

As a further improvement of the invention: the DSP module is electrically connected with a TF card connecting module.

As a further improvement of the invention: the DSP module is electrically connected with a Bluetooth connecting module.

As a further improvement of the invention: built-in microphone circuit passes through external microphone circuit and DSP module electric connection, and external microphone circuit blocks built-in microphone circuit to DSP module transmission signal when external microphone input seat and external microphone switch-on.

As a further improvement of the invention: the power module comprises a lithium battery unit, a charging circuit, a 5V booster circuit, a 12V booster circuit and a 3.3V voltage stabilizing circuit, wherein the lithium battery unit is electrically connected with the charging circuit, the 5V booster circuit, the 12V booster circuit and the 3.3V voltage stabilizing circuit, the 12V booster circuit is electrically connected with the sensor input circuit, the 5V booster circuit is respectively electrically connected with the built-in microphone circuit, the digital-analog converter and the control module, and the 3.3V voltage stabilizing circuit is electrically connected with the DSP module.

Compared with the prior art, the invention has the beneficial effects that:

gather audio signal through built-in electret microphone, electret microphone transmits audio signal to DSP module through built-in microphone circuit, realizes the function of receiving and recording the sound through electret microphone. Be connected with external microphone through external microphone input seat to can gather audio signal through external microphone, and transmit the audio signal that external microphone gathered to the DSP module through external microphone circuit, realize the function of receiving and recording sound through external microphone. The pickup is electrically connected with the musical instrument through the pickup input interface, so that audio signals can be collected through the pickup, the audio signals collected by the pickup are transmitted to the DSP module through the sensor input circuit, and the function of recording sounds through the pickup is realized.

The mobile phone connector is used for connecting a mobile phone, the DSP module transmits audio signals to the digital-to-analog converter, the audio signals are processed by the digital-to-analog converter, the audio signals are transmitted to the mobile phone connector through the mobile phone live broadcast connecting circuit, the audio signals are transmitted to the mobile phone through the mobile phone connector, therefore, sound can be recorded through the pickup system in the process of live broadcast by using the mobile phone, the recorded sound is converted into the audio signals to be transmitted to the mobile phone, audiences watching the live broadcast can hear the sound recorded by the pickup system, and the effect of conveniently carrying out live broadcast activities is achieved.

The earphone output interface is used for connecting an earphone, the DSP module transmits the audio signals to the earphone output interface through the earphone output circuit, and the audio signals are transmitted to the earphone through the earphone output interface, so that the audio signals output by the DSP module can be played by the earphone, and the function of outputting the audio signals is realized. In the live broadcast process, the anchor broadcasts wear the earphones connected with the earphone output interface, the sound output by the pickup system can be directly heard, the anchor broadcasts can be made to listen in a trial mode conveniently, the sound emitted in the listening in-process can be prevented from being recorded again, and therefore the effect of improving the recording effect and making things convenient for live broadcast can be achieved.

The power amplifier output interface is used for connecting the power amplifier, and the DSP module transmits audio signal to digital-to-analog converter, and audio signal handles the back through digital-to-analog converter, transmits audio signal to power amplifier output interface through preceding stage audio output circuit, transmits audio signal to the power amplifier through power amplifier output interface to can play the audio signal of DSP module output through the power amplifier when needs, play the effect of convenient live broadcast.

This pickup system can be respectively through built-in electret microphone, connect external microphone on external microphone input seat and connect the adapter on adapter input interface, gather audio signal from the position of difference respectively to can be convenient gather the sound that musical instrument and anchor broadcast sent respectively in the live broadcast, and can use the component for the radio reception more for being close to the pronunciation position, thereby can receive and play more clear sound, improve the recording effect. The sound source recorder has the advantages of conveniently recording sound sources at different positions and having a good recording effect, has a good commercial application prospect, and can bring great convenience to the entertainment life of people.

Be connected with external USB memory through USB connection module to can write into audio signal in external USB memory through control module control DSP module, and then can be quick store the audio frequency in the USB memory, play the effect that facilitates the use. The control module is used for controlling the DSP module to play audio data preset in the USB memory, so that the function of playing the accompaniment can be realized by presetting accompaniment audio data in the USB memory.

Connect with TF card memory through TF card connection module to can write in audio signal into TF card memory through control module control DSP module, and then can be quick store the audio frequency to TF card memory in, play the effect of facilitating the use. The audio data that predetermines in the TF card can also be played through control module control DSP module to can realize the function of broadcast accompaniment through predetermineeing accompaniment audio data in the TF card.

Be connected through bluetooth link module and external bluetooth module to can be through control module control DSP module with audio signal transmission to external bluetooth module in, and then can be quick transmit the audio signal who records through bluetooth link module, play the effect that facilitates the use.

When the external microphone is electrically connected with the external microphone input seat, the external microphone circuit is electrically connected with the external microphone and blocks the built-in microphone circuit from transmitting audio signals to the DSP module. When the user need not use external microphone to record, built-in microphone circuit can transmit audio signal to the DSP module to can record through built-in electret microphone. When the user need use external microphone to record, the built-in microphone circuit of prevention is to DSP module transmission audio signal to can prevent that the electret microphone from causing the influence to the audio and tone quality of radio-recorder, play the effect that improves the recording effect and make things convenient for the recording.

The charging circuit can charge the lithium battery unit and store electric energy by using the lithium battery. The lithium battery unit respectively supplies power to the 12V booster circuit, the 5V booster circuit and the 3.3V voltage stabilizing circuit, and the voltage is boosted to 12V through the 12V booster circuit to supply power to the sensor input circuit; after the voltage is boosted to 5V by the 5V booster circuit, the built-in microphone circuit, the digital-to-analog converter and the control module are powered; and the DSP module is supplied with power through a 3.3V voltage stabilizing circuit. The 12V booster circuit, the 5V booster circuit and the 3.3V voltage stabilizing circuit are used for supplying power, so that the sound pickup system of the musical instrument can stably operate.

Drawings

FIG. 1 is a schematic view of a connection structure of the present embodiment;

fig. 2 is a schematic diagram of a connection structure of a power module in the present embodiment;

FIG. 3 is a schematic circuit diagram of the DSP module according to the present embodiment;

FIG. 4 is a schematic circuit diagram of the input module according to the present embodiment;

fig. 5 is a schematic circuit connection diagram of the digital-to-analog converter, the live connection circuit of the mobile phone and the preceding stage audio output circuit in this embodiment;

FIG. 6 is a schematic circuit diagram of the earphone output circuit according to the present embodiment;

FIG. 7 is a schematic circuit diagram of the control module according to the present embodiment;

FIG. 8 is a schematic circuit diagram of the key circuit of the present embodiment;

fig. 9 is a circuit connection diagram of the power module in this embodiment.

Reference numerals: 11. a DSP module; 12. a control module; 13. a Bluetooth connection module; 14. a USB connection module; 15. a TF card connecting module; 16. a key input circuit; 21. a radio module; 22. a built-in microphone circuit; 23. an electret microphone; 24. a microphone circuit is connected externally; 25. an external microphone input seat; 26. a sensor input circuit; 27. a sound pick-up input interface; 31. an output module; 32. a digital-to-analog converter; 33. a mobile phone live broadcast connecting circuit; 34. a mobile phone connector; 35. a preceding stage audio output circuit; 36. a power amplifier output interface; 37. an earphone output circuit; 38. an earphone output interface; 41. a power supply module; 42. a charging circuit; 43. a lithium battery cell; 44. a 12V boost circuit; 45. a 5V boost circuit; 46. 3.3V voltage stabilizing circuit.

Detailed Description

The invention will now be further described with reference to the accompanying description and examples: