CN218734950U - Audio amplification circuit, audio amplification equipment and education all-in-one machine - Google Patents
Audio amplification circuit, audio amplification equipment and education all-in-one machine Download PDFInfo
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- CN218734950U CN218734950U CN202222905100.1U CN202222905100U CN218734950U CN 218734950 U CN218734950 U CN 218734950U CN 202222905100 U CN202222905100 U CN 202222905100U CN 218734950 U CN218734950 U CN 218734950U
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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
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Abstract
The utility model relates to the technical field of audio amplification, in particular to an audio amplification circuit, amplification equipment and an education all-in-one machine, wherein the audio amplification circuit comprises a main control unit for outputting local audio; the audio mixing unit comprises two input ends and two output ends, wherein the first input end is connected with the voice input equipment and is used for receiving external audio; the second input end is connected with the main control unit and used for receiving the local audio; the first output end is connected with the input end of the main control unit and used for inputting the external audio frequency into the main control unit; and the second output end is connected with the power amplification unit and used for outputting the sound mixing result of the external audio and the local audio. And the power amplification unit is used for amplifying the sound mixing result. For the external audio, the processing is realized through the mixing unit, and the time delay caused by the processing of the main control unit can be reduced.
Description
Technical Field
The utility model relates to an audio frequency public address technical field, concretely relates to audio frequency public address circuit, public address equipment and education all-in-one.
Background
An earphone interface is generally arranged in the audio amplifying circuit and can be used for connecting external sound boxes, and the sound boxes play music and the whole machine loudspeaker performs local sound amplification. For example, the wireless microphone can be used for receiving some wireless microphones, wherein a wireless receiving end is connected to an earphone interface, a user can wear a transmitting end of the wireless microphone, when the user speaks, audio is transmitted to the wireless receiving end through wireless, the wireless receiving end converts a digital signal into an analog signal after decoding and inputs the analog signal to the main control unit through the earphone interface, the main control unit can collect the audio coming from the earphone interface, and meanwhile, the main control unit is connected to a loudspeaker through connecting a power amplifier chip to make sound.
The wireless receiving end is connected with the wireless microphone, and the input audio of the wireless microphone is connected to the main control unit. As shown in fig. 1, the main control unit is connected to the power amplifier unit, and outputs sound from the audio output device after the audio is amplified by the power amplifier unit.
However, in the above audio amplifying circuit, since the processing required by the main control unit may reach hundreds of milliseconds, the user may obviously feel the time difference from the beginning of speaking to the actual speaker sounding.
Disclosure of Invention
In view of this, the embodiment of the utility model provides an audio frequency public address circuit, public address equipment and education all-in-one to solve the problem of public address time delay.
According to a first aspect, an embodiment of the present invention provides an audio amplifying circuit, including:
the main control unit is used for outputting local audio;
the audio mixing unit comprises two input ends and two output ends, wherein the first input end is connected with the voice input equipment and is used for receiving external audio; the second input end is connected with the main control unit and used for receiving the local audio; the first output end is connected with the input end of the main control unit and used for inputting the external audio frequency into the main control unit; and the second output end is connected with the power amplification unit and used for outputting the sound mixing result of the external audio and the local audio.
And the power amplification unit is used for amplifying the sound mixing result.
The embodiment of the utility model provides an audio amplification circuit, to external audio frequency through the audio mixing unit receipt, utilize the audio mixing unit to handle external audio frequency and the local audio frequency of main control unit and obtain the audio mixing result and export to the power amplifier unit and carry out the public address, to external audio frequency, its processing is realized through the audio mixing unit, can reduce the time delay that brings because the processing of main control unit; meanwhile, the sound mixing unit can also output the received external audio to the main control unit, so that the main control unit can also acquire the external audio, and the original audio link function is maintained.
In some embodiments, the power amplifier unit includes:
the input end of the first power amplifier subunit is connected with the second output end of the sound mixing unit;
and the audio output equipment is connected with the output end of the first power amplifier subunit.
The embodiment of the utility model provides an audio frequency public address circuit includes first power amplifier subunit and audio output equipment in the power amplifier unit for audio frequency after amplifying from first power amplifier subunit can directly be connected from audio output equipment, and need not external other audio output equipment again, has simplified circuit structure.
In some embodiments, the power amplifier unit further includes:
and the input end of the second power amplifier subunit is connected with the output end of the main control unit and is used for amplifying the local audio and the external audio.
The embodiment of the utility model provides an audio frequency public address circuit includes second power amplifier subunit in the power amplifier unit, and it can carry out the public address to local audio frequency and external audio frequency to output through the main control unit is connected with external audio output device, can improve the volume of output audio frequency, realizes the public address of bigger volume.
In some embodiments, the second power amplifier subunit includes an output terminal for connecting to an external audio output device.
In some embodiments, the circuit further includes a wireless communication terminal connected to the mixing unit, and the wireless communication terminal is configured to receive the external audio.
The embodiment of the utility model provides an audio frequency public address circuit utilizes the wireless communication end to receive external audio frequency, has simplified circuit connection.
In some embodiments, the wireless communication terminal is a wireless interface for adapting to a wireless receiver.
According to a second aspect, the embodiment of the present invention further provides a sound amplifying apparatus, including:
an apparatus body;
the embodiment of the utility model provides an in the first aspect or any embodiment of the first aspect audio amplification circuit, audio amplification circuit sets up in the equipment body.
The embodiment of the utility model provides an audio amplifier utilizes the audio mixing unit among the audio amplification circuit to realize the audio mixing output of local audio frequency and external audio frequency, to the public address output link of external audio frequency, need not the processing of main control unit, has reduced the public address time delay.
In some embodiments, the public address apparatus further comprises:
and the voice input equipment is connected with the audio amplification circuit.
In some embodiments, a wireless interface is disposed on the device body, the wireless interface is adapted to a wireless receiver, and the wireless receiver is configured to input external audio of the voice input device into the wireless interface.
According to a third aspect, the embodiment of the present invention further provides an education machine, including:
the embodiment of the utility model provides an in the first aspect or any one of the implementation modes of the first aspect audio amplification circuit, the audio output device that power amplifier unit includes does the audio output device of education all-in-one.
The embodiment of the utility model provides an education all-in-one with in the audio frequency public address circuit integration education all-in-one, realizes the integration of public address and teaching equipment, realizes the integration teaching.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an audio amplifying circuit;
fig. 2 is a schematic structural diagram of an audio amplifying circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an audio amplifying circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.
The embodiment of the utility model provides an audio amplification circuit, as shown in fig. 2, including main control unit 10, audio mixing unit 20 and power amplifier unit 30. Wherein the main control unit 10 is used for outputting the local audio to the mixing unit 20. For example, in the course of teaching by a teacher, for the PPT with sound effect or embedded audio and video, the sound effect or embedded audio and video is local audio. The local audio is the audio output from the main control unit 10, not the audio input from the outside.
The mixing unit 20 includes two input terminals and two output terminals, and specifically, a first input terminal is connected to the voice input device for receiving external audio. The voice input device includes, but is not limited to, a collar-clipped microphone, a microphone, etc., and is specifically set according to actual requirements. A second input of the mixing unit 20 is connected to the main control unit 10 for receiving local audio from the main control unit 10. The local audio and the external audio are mixed in the mixing unit 20 to obtain a mixing result, which is the audio input into the power amplifier unit.
It should be noted that the mixing process of the local audio and the external audio by the mixing unit 20 is a processing function of the mixing unit 20, and for example, mixing can be implemented by using a mixing chip. In this embodiment, the specific processing manner of the sound mixing is not limited at all, and may be set specifically according to actual requirements. To the utility model discloses the technical problem that will solve, the concrete processing mode of audio mixing is not the content that will care about of solving this technical problem, for solving this technical problem of expansion delay, and the technological means that introduces changes the audio frequency processing link that fig. 1 shows, promptly, through introducing the audio mixing unit, puts external audio frequency and local audio frequency and carries out the audio mixing in the audio mixing unit and handle the back through power amplifier unit output.
A first output end of the audio mixing unit 20 is connected to an input end of the main control unit 10, and is configured to input external audio into the main control unit 10. For the main control unit 10, the external audio can still be acquired, so that the main control unit 10 can maintain the original audio link function, and the acquired external audio can be provided to other output channels by the main control unit. A second output end of the audio mixing unit 20 is connected to the power amplification unit 30, and is configured to output an audio mixing result of the external audio and the local audio.
The power amplification unit 30 is configured to amplify the audio mixing result, that is, to amplify the power of the audio mixing result, so as to increase the volume of the output audio.
The audio amplifying circuit provided by the embodiment receives the external audio through the audio mixing unit, processes the external audio and the local audio of the main control unit through the audio mixing unit to obtain an audio mixing result, and outputs the audio mixing result to the power amplification unit for sound amplification, and for the external audio, the processing is realized through the audio mixing unit, so that the time delay caused by the processing of the main control unit can be reduced; meanwhile, the sound mixing unit can also output the received external audio to the main control unit, so that the main control unit can also acquire the external audio, and the original audio link function is maintained.
In some embodiments, the power amplifier unit includes a first power amplifier subunit and an audio output device. The input terminal of the first power amplifier subunit is connected to the second output terminal of the audio mixing unit 20. The number of the first power amplifier subunits included in the power amplifier unit is not limited at all, and may be 1 or 2, that is, one first power amplifier subunit corresponds to each of the left channel and the right channel.
The audio output device is connected with the output end of the first power amplifier subunit. If the power amplifier unit comprises two first power amplifier subunits, two corresponding audio output devices are provided for respectively outputting the audio of the left channel and the audio of the right channel.
Through including first power amplifier subunit and audio output equipment in power amplifier unit 30 for audio frequency after amplifying from first power amplifier subunit can directly be connected from audio output equipment, and need not external other audio output equipment again, has simplified circuit structure.
In other embodiments, the power amplifier unit further includes a second power amplifier subunit, and an input end of the second power amplifier subunit is connected to an output end of the main control unit, and is configured to amplify the local audio and the external audio. As described above, the mixing unit 20 is also used to output the received external audio to the main control unit 10. That is, the main control unit 10 can acquire the local audio and the external audio. The main control unit 10 can process the local audio and the external audio according to the original audio processing link, and output the processed local audio and the external audio to the second power amplifier subunit for sound amplification.
The second power amplifier subunit also comprises an output end which is used for connecting with external audio output equipment, and the audio of the second power amplifier subunit is output from the external audio output equipment. For example, the external audio output device is a sound box or the like.
Through including second power amplifier subunit in the power amplifier unit, it can carry out the public address to local audio frequency and external audio frequency to output through the main control unit is connected with external audio output device, can improve the volume of output audio frequency, realizes the public address of bigger volume.
It should be noted that the first power amplifier subunit and the second power amplifier subunit can only work one at a time, that is, the power amplifier unit to be used is selected before being used, or the default power amplifier unit may not be selected to be directly used.
As an optional implementation manner of this embodiment, the audio amplifying circuit further includes a wireless communication terminal connected to the sound mixing unit, where the wireless communication terminal is configured to receive external audio. The wireless communication terminal and the external voice input device can be connected in a wireless mode such as Bluetooth or wifi, and no limitation is imposed on the wireless communication terminal and the external voice input device. And the wireless communication terminal is used for receiving external audio, so that the circuit connection is simplified.
In some embodiments, the wireless communication terminal is a wireless interface for adapting to a wireless receiver. The wireless receiver is used for corresponding to a wireless transmitter in external voice input equipment, and wireless connection between the sound mixing unit and the voice input equipment is achieved.
As a specific application example of the audio amplifying circuit IN this embodiment, as shown IN fig. 3, the main control unit is a main chip, the audio mixing unit is an audio mixing chip, and the wireless communication terminal is an addio IN headset terminal. Specifically, a sound mixing chip is introduced into the audio amplifying circuit, and the sound mixing chip comprises two output ends I2S OUT, two input ends, namely, one input end I2S IN and one input end L/R IN. Wherein L/R IN is connected with the Aduio IN earphone terminal, one path of I2S OUT is provided for the power amplifier unit, and the other path of I2S OUT is provided for the main chip.
Because the I2S OUT can mix the audio of the I2S IN and the audio of the L/R IN together for output, and the audio path of the mixing chip from the I2S IN to the I2S OUT is very short, and the delay is only a few milliseconds IN the mixing chip, the time of the audio path from the mixing chip to the power amplification unit is much shorter than the time of the audio path to the main chip. The mixing chip also provides another path of I2S OUT which can be directly input to the main chip, and the main chip can also collect the audio frequency coming from Aduio IN. Therefore, the audio amplification circuit not only shortens the amplification path to a great extent, but also realizes low-delay amplification; meanwhile, the Aduio IN audio can be continuously kept to be sent to the main chip for collection, the original audio link function is maintained, and the audio data collected by the main chip can be sent to other output channels such as SPDIF TX or HDMI OUT.
The embodiment of the utility model provides a still provide a public address equipment, including equipment body and the audio frequency public address circuit of setting in equipment body. For details of the audio amplifying circuit, please refer to the above description, and details are not repeated herein.
Public address equipment can be wearable equipment, utilizes being connected of this wearable equipment and speech input equipment, realizes carrying out the output after the public address to local audio frequency and the external audio frequency that speech input equipment gathered to realize local public address.
According to the public address equipment provided by the embodiment, the audio mixing unit in the audio public address circuit is used for realizing the audio mixing output of the local audio and the external audio, and for the public address output link of the external audio, the processing of the main control unit is not needed, so that the public address delay is reduced.
In some embodiments, the audio amplifier further comprises a voice input device coupled to the audio amplifier circuit. The connection mode may be a wireless connection or a wired connection, which is not limited herein and is specifically set according to actual requirements.
In other embodiments, a wireless interface is further disposed on the device body, the wireless interface is adapted to a wireless receiver, and the wireless receiver is configured to input external audio of the voice input device into the wireless interface. When the public address equipment is used, the wireless receiver is inserted into the wireless interface, the wireless connection between the wireless receiver and the voice input equipment is realized, and therefore the external audio collected by the voice input equipment is input into the sound mixing unit through the wireless receiver.
The embodiment of the utility model provides a still provide an education all-in-one, including audio frequency public address circuit, the audio output device that power amplifier unit includes among this audio frequency public address circuit is the audio output device of education all-in-one. The audio amplification circuit is integrated in the education all-in-one machine, and after external audio collected by the voice input device and local audio of the main control unit are mixed in the audio mixing unit, the external audio and the local audio are processed by the power amplification unit and then output from audio output equipment of the education all-in-one machine. In the audio amplification circuit integrated middle education all-in-one machine, the integration of amplification and teaching equipment is realized, and integrated teaching is realized.
Wherein the following table shows the comparison between the scheme of figure 1 and the schemes of figures 2 and 3:
it can be seen through the contrast of table above that, the education all-in-one that this embodiment provided can reduce the output delay of audio frequency, is fit for local public address to realize low delay public address. The education all-in-one machine not only shortens the sound amplifying path to a great extent, but also realizes low-delay sound amplification; meanwhile, the Aduio IN audio can be continuously kept to be collected by the main chip, and the original audio link function is maintained. And carry out the public address through the Speaker that the education all-in-one was taken certainly, loudspeaker power more than 10W at least, more than 80dB of sound pressure level at least, sound power enough big can cover the space in a standard classroom, can hang down the public address with low delay moreover to mr, and the experience of giving lessons is very good.
In some embodiments, the educational all-in-one machine further includes a touch display screen for playing corresponding content, and the user can label or switch the display content through interaction with the touch display screen, and so on.
As an optional application scene of the education integrative machine in the embodiment, an audio amplification circuit is integrated in the education integrative machine. In the course of teaching in class, the teacher collects external audio through the voice input device, and the external audio is received by the wireless receiving end in the audio amplification circuit and is transmitted to the audio mixing unit. Meanwhile, a teaching PPT is further displayed on a touch display screen of the education all-in-one machine, and audio or PPT playing sound effect is embedded into the teaching PPT. In the PPT playing process, the main control unit also outputs embedded audio or playing sound effect, namely local audio. And after the local audio and the external audio are subjected to audio mixing in the audio mixing unit, the local audio and the external audio are output to the power amplification unit. The output end of the power amplifier unit is connected with the audio output equipment of the education integrated machine, so that audio is output in the audio output equipment of the education integrated machine. The teaching integrated machine can be used for playing the teaching PPT and realizing local sound amplification output of audio.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. An audio amplification circuit, comprising:
the main control unit is used for outputting local audio;
the audio mixing unit comprises two input ends and two output ends, wherein the first input end is connected with the voice input equipment and is used for receiving external audio; the second input end is connected with the main control unit and used for receiving the local audio; the first output end is connected with the input end of the main control unit and is used for inputting the external audio frequency into the main control unit; the second output end is connected with the power amplification unit and used for outputting the sound mixing result of the external audio and the local audio;
and the power amplification unit is used for amplifying the sound mixing result.
2. The circuit of claim 1, wherein the power amplifier unit comprises:
the input end of the first power amplifier subunit is connected with the second output end of the sound mixing unit;
and the audio output equipment is connected with the output end of the first power amplifier subunit.
3. The circuit of claim 1, wherein the power amplifier unit further comprises:
and the input end of the second power amplifier subunit is connected with the output end of the main control unit and is used for amplifying the local audio and the external audio.
4. The circuit of claim 3, wherein the second power amplifier subunit comprises an output terminal for connecting to an external audio output device.
5. The circuit according to claim 1, further comprising a wireless communication terminal connected to the mixing unit, wherein the wireless communication terminal is configured to receive the external audio.
6. The circuit of claim 5, wherein the wireless communication terminal is a wireless interface, and the wireless interface is adapted to a wireless receiver.
7. A sound reproducing apparatus, characterized by comprising:
an apparatus body;
the audio amplification circuit of any of claims 1-6, disposed within the device body.
8. The sound reproducing apparatus as claimed in claim 7, further comprising:
and the voice input equipment is connected with the audio amplification circuit.
9. The loudspeaker equipment as recited in claim 8, wherein a wireless interface is disposed on the equipment body, the wireless interface is adapted to a wireless receiver, and the wireless receiver is configured to input external audio of the voice input equipment into the wireless interface.
10. An educational all-in-one machine, comprising:
the audio amplifying circuit of any one of claims 1 to 6, wherein the audio output device included in the power amplifier unit is an audio output device of the education integration machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222905100.1U CN218734950U (en) | 2022-10-31 | 2022-10-31 | Audio amplification circuit, audio amplification equipment and education all-in-one machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222905100.1U CN218734950U (en) | 2022-10-31 | 2022-10-31 | Audio amplification circuit, audio amplification equipment and education all-in-one machine |
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| Publication Number | Publication Date |
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| CN218734950U true CN218734950U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222905100.1U Active CN218734950U (en) | 2022-10-31 | 2022-10-31 | Audio amplification circuit, audio amplification equipment and education all-in-one machine |
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| CN (1) | CN218734950U (en) |
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