CN213403474U - Multichannel live broadcast sound digital power amplifier all-in-one machine - Google Patents

Abstract

The utility model discloses a live stereo set digit power amplifier all-in-one of multichannel, memory, peripheral hardware interface connection audio signal source module, audio processor is connected to audio signal source module output, audio processor output connection circulation monitoring module, audio frequency switching controller is connected to audio frequency switching module input, audio frequency switching module output connects the anti-interference module of audio frequency, audio frequency playing module is connected to the anti-interference module of audio frequency output, interactive module is connected to audio frequency switching controller input. The utility model discloses an among the audio frequency switching module through setting up photoelectric coupler, avoid because the switching signal malfunction that external disturbance leads to, and then realize that the switching of every signal all the way is all accurate. Through the anti-jamming module of audio frequency, can filter the high frequency clutter in the signal transmission process, realize the purpose of making an uproar of falling for audio signal is more high-quality. And realizing the live broadcast monitoring of the multi-channel signal source through the circulating monitoring module.

Description

Multichannel live broadcast sound digital power amplifier all-in-one machine

The technical field is as follows:

the utility model relates to an audio processing technology field especially relates to a live stereo set digit power amplifier all-in-one of multichannel.

Background art:

the sound system is a sound system which is formed by converting sound wave signals of original sound production field sounds into electric signals by a microphone, processing the electric signals by some electronic equipment according to certain requirements, and finally converting the electric signals into the sound wave signals by a loudspeaker for reproduction. Wherein both the microphone and the loudspeaker are referred to as transducers. Although the electrical signals in the sound system are different from the sound signals of sound waves in terms of energy form and dimension, the nature of the information between them is consistent as signals, i.e. their amplitudes have a correspondence of relative magnitude, and their frequencies also correspond, so the electrical signals in the sound system are in the sound frequency range of 20Hz to 20000Hz in frequency, called audio signals.

The existing sound equipment does not have the function of monitoring direct broadcast of a plurality of channels, and signal interference exists among a plurality of channel circuits, so that the design of a system capable of monitoring multi-channel direct broadcast signals is urgently needed, and noise reduction of the multi-channel circuit is realized through a noiseless conversion circuit.

The utility model has the following contents:

an object of the utility model is to provide a live stereo set digit power amplifier all-in-one of multichannel to solve the not enough of prior art.

The utility model discloses by following technical scheme implement: the utility model provides a multichannel live broadcast stereo set digit power amplifier all-in-one, includes memory, peripheral hardware interface, audio signal source module, audio processor, circulation monitoring module, audio frequency switching module, audio frequency anti-jamming module, audio frequency switching controller, audio playback module and interaction module, memory, peripheral hardware interface connection audio signal source module, audio processor is connected to audio signal source module output, circulation monitoring module, audio frequency switching module are connected to the audio processor output, audio frequency switching controller is connected to audio frequency switching module input, audio frequency switching module output is connected audio frequency anti-jamming module, audio frequency anti-jamming module output is connected audio playback module, interaction module is connected to audio frequency switching controller input.

Preferably, the audio switching module comprises a plurality of audio input interfaces, a plurality of optical coupler input modules and a relay module, wherein the input end of the relay module is connected with the plurality of audio input interfaces and the plurality of optical coupler input modules, the input end of the plurality of optical coupler input modules is connected with the audio switching controller, and the output end of the relay module is connected with the audio anti-interference module.

Preferably, the peripheral interface is any one of a network port, a USB interface, an RS232 serial port, a cannon head interface and an audio signal round port or a combination thereof.

Preferably, the audio anti-interference module is a balanced-to-unbalanced audio processing circuit based on an operational amplifier, and two balanced input ends of the balanced-to-unbalanced audio processing circuit are connected with the LC low-pass filter circuit.

Preferably, the audio switching controller is a DSP processor.

Preferably, the interaction module is a key or a touch screen.

The utility model has the advantages that:

the utility model discloses an among the audio frequency switching module through setting up photoelectric coupler, avoid because the switching signal malfunction that external disturbance leads to, and then realize that the switching of every signal all the way is all accurate. Through the anti-jamming module of audio frequency, can filter the high frequency clutter in the signal transmission process, realize the purpose of making an uproar of falling for audio signal is more high-quality. And realizing the live broadcast monitoring of the multi-channel signal source through the circulating monitoring module.

Description of the 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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 an overall schematic block diagram of a multichannel direct-broadcast sound digital power amplifier all-in-one machine according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of an audio switching module of the multichannel direct-broadcast audio digital power amplifier all-in-one machine according to the embodiment of the present invention;

fig. 3 is the utility model discloses an audio frequency of live stereo set digit power amplifier all-in-one switches module circuit schematic diagram of multichannel.

Fig. 4 is the utility model discloses an audio frequency anti-interference module circuit schematic diagram of direct broadcast stereo set digit power amplifier all-in-one of multichannel.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, a multichannel live audio digital power amplifier all-in-one machine, including memory 1, peripheral interface 2, audio signal source module 3, audio processor 4, circulation monitoring module 5, audio frequency switching module 6, audio frequency anti-interference module 7, audio frequency switching controller 8, audio playing module 9 and interaction module 10, memory 1, peripheral interface 2 connects audio signal source module 3, audio signal source module 3 output is connected with audio processor 4, audio processor 4 output is connected circulation monitoring module 5, audio frequency switching module 6 input is connected with audio frequency switching controller 8, audio frequency anti-interference module 7 is connected to audio frequency switching module 6 output, audio frequency anti-interference module 7 output is connected with audio playing module 9, audio frequency switching controller 8 input is connected with interaction module 10.

As shown in fig. 4, the audio anti-interference module 7 is an operational amplifier-based balanced-to-unbalanced audio processing circuit, and two balanced input terminals of the balanced-to-unbalanced audio processing circuit are connected to the LC low-pass filter circuit. The radio frequency loop ground required by the single-ended signal is often shared with the direct current ground, which may cause mutual interference; the differential signal processed by the balanced-to-unbalanced audio processing circuit can be physically isolated from a direct current ground, so that the problem of interference between the grounds is solved; and the differential signal can effectively restrain common mode interference. Because the differential signals of the balance circuit have the same amplitude and opposite phases, the common mode interference of the differential signals and the common mode interference of the balance circuit are mutually counteracted, and the anti-interference effect is good.

In addition, the peripheral interface 2 is any one of a network port, a USB interface, an RS232 serial port, a cannon head interface, and an audio signal round port, or a combination thereof, and specifically, what kind of output interface the externally accessed audio generating device is.

The audio switching controller 8 is a DSP processor and is configured to send a switching control signal to the audio switching module to implement selection of multiple audio signals. Compared with an analog signal processing system, the digital signal processing system based on the general DSP chip has the following advantages: (1) high precision, high anti-interference ability and high stability. The precision is only affected by quantization error, namely limited word length, the signal-to-noise ratio is high, and the influence of device performance is small. The influence of external factors such as temperature and environment is small. (2) The programming is convenient, and the complex algorithm (including the self-adaptive algorithm) is easy to realize. The DSP chip provides a high-speed computing platform and can realize complex signal processing. (3) Can be programmed, and does not need to be redesigned, assembled and debugged when the function and the performance of the system are changed. (4) The interface is simple, the electrical characteristics of the system are simple, and the data stream adopts a standard protocol. (5) The integration is convenient. (6) Functions that cannot be realized by analog processing can be realized: linear phase, multiple sampling rate processing, cascading, easy storage and the like; (7) can be used for very low frequency signals. The method is applied to the field of audio processing, and particularly exerts excellent digital signal processing functions, so that the method is very suitable for acoustic digital signal processing of the application.

The interactive module 10 is a key or a touch screen, and is configured to operate and control the audio switching controller 8 to send out a switching control signal. As shown in fig. 2 and 3, the audio switching module 6 includes a plurality of audio input interfaces 61, a plurality of optical coupler input modules 62 and a relay module 63, an input end of the relay module 63 is connected to the plurality of audio input interfaces 61 and the plurality of optical coupler input modules 62, an input end of the plurality of optical coupler input modules 62 is connected to the audio switching controller 8, and an output end of the relay module 63 is connected to the audio anti-jamming module 7. As shown in fig. 3, the switching control signal sent by the audio controller 8 is firstly isolated by the optocoupler and then output to the base of the triode, the optocoupler has a good anti-interference effect, thereby avoiding the false operation of the switching signal caused by external interference and further realizing the accurate switching of each path of signal. When the triode is conducted, the relay acts, the transmission of the corresponding channel signal to the next stage is achieved, and the transmission of the channel signal corresponding to the relay without action is suspended.

The utility model discloses a theory of operation is:

as shown in fig. 1, the memory 1 and the peripheral interface 2 provide audio signal sources for the audio signal source module 3, after audio compression, compensation and other processing are performed on audio signals by the audio processor 4, on one hand, output signals are monitored to the circulation monitoring module 5 for multiple channels of signals, on the other hand, multiple channels of audio signals are output to the audio switching module 6 through the multiple channels of audio input interfaces 61, the multiple channels of optical coupler input modules 62 are controlled by the audio controller 8, when the audio controller 8 sends out control signals for gating corresponding signal sources, the corresponding relay modules 63 are turned on, and finally, after further audio anti-interference processing by the audio anti-interference module 7, the signals are output through the audio playing module 9 (a sound box or an earphone).

Wherein, through setting up photoelectric coupler in the audio frequency switches module 6, avoid because the switching signal malfunction that external disturbance leads to, and then realize that the switching of every way signal is all accurate. Through the anti-jamming module 7 of audio frequency, can filter the high frequency clutter in the signal transmission course, realize falling the mesh of making an uproar for audio signal is more high-quality. And the direct broadcast monitoring of the multi-channel signal source is realized through the circulating monitoring module 5.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A multichannel live sound digital power amplifier all-in-one machine is characterized by comprising a memory (1), a peripheral interface (2), an audio signal source module (3), an audio processor (4), a circulating monitoring module (5), an audio switching module (6), an audio anti-interference module (7), an audio switching controller (8), an audio playing module (9) and an interaction module (10), wherein the memory (1) and the peripheral interface (2) are connected with the audio signal source module (3), the output end of the audio signal source module (3) is connected with the audio processor (4), the output end of the audio processor (4) is connected with the circulating monitoring module (5) and the audio switching module (6), the input end of the audio switching module (6) is connected with the audio switching controller (8), and the output end of the audio switching module (6) is connected with the audio anti-interference module (7), the output end of the audio anti-interference module (7) is connected with an audio playing module (9), and the input end of the audio switching controller (8) is connected with an interaction module (10).

2. The all-in-one machine of the direct broadcasting sound and the digital power amplifier of the multichannel of claim 1 is characterized in that the audio switching module (6) comprises a multichannel audio input interface (61), a multichannel optical coupler input module (62) and a relay module (63), wherein the input end of the relay module (63) is connected with the multichannel audio input interface (61) and the multichannel optical coupler input module (62), the input end of the multichannel optical coupler input module (62) is connected with the audio switching controller (8), and the output end of the relay module (63) is connected with the audio anti-interference module (7).

3. The all-in-one machine of the multi-channel live broadcasting sound and digital power amplifier as claimed in claim 1, wherein the peripheral interface (2) is any one of a network port, a USB interface, an RS232 serial port, a Cannon head interface and an audio signal round port or a combination thereof.

4. The all-in-one machine of the multi-channel live broadcast sound and digital power amplifier is characterized in that the audio anti-interference module (7) is a balanced-to-unbalanced audio processing circuit based on an operational amplifier, and two balanced input ends of the balanced-to-unbalanced audio processing circuit are connected with an LC low-pass filter circuit.

5. The all-in-one machine of the multi-channel live broadcast sound and digital power amplifier as claimed in claim 1, wherein the audio switching controller (8) is a DSP processor.

6. The all-in-one machine of the multi-channel live broadcast sound box and the digital power amplifier as claimed in claim 1, wherein the interaction module (10) is a key or a touch screen.

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