CN217011170U - A audio power amplifier circuit, K song stereo set and K song system for K song stereo set - Google Patents

Abstract

The utility model relates to a technical field of K sings stereo set, a audio power amplifier circuit for K sings stereo set, K sings stereo set and K sings the system, wherein, audio power amplifier circuit includes the OTT module, the DSP module, preceding stage amplification module and power amplifier module, the DSP module includes BP1048 audio processor, the OTT module includes the RK3328 chip, be provided with HDMI interface and network interface on the OTT module, the OTT module is used for sending the audio signal corresponding with song of singing to the DSP module at present, receive the audio signal after the DSP module is handled and carry out identification process to the audio signal after the audio processing, and through the video or the image signal that HDMI interface output and audio signal are corresponding. Under the cooperation of the OTT module and the DSP module, the circuit is optimized to the greatest extent, and the audio processing capacity of the circuit is improved.

Description

A audio power amplifier circuit, K song stereo set and K song system for K song stereo set

Technical Field

The application relates to the technical field of K sings stereo set, especially relate to an audio power amplifier circuit, K sings stereo set and K sings system for K sings stereo set.

Background

Along with the improvement of living standard of people, K sings have become one of living modes of meeting friends making and entertainment of people, and the demand of singing, training and listening to songs is gradually becoming the common demand of families. The existing karaoke device, a common karaoke system equipped in the KTV, usually includes a sound box, a karaoke machine, a wireless microphone receiver, an effector, an audio power amplifier, a display and various wires which are independently arranged, which are complex and have high requirements for installation space and environment, and general users do not have the condition of moving the whole set of device home.

Based on the above problems, the karaoke sound equipment comes along, but the existing karaoke sound equipment has poor performance of an audio processing circuit and a power amplifier circuit and poor audio processing capability, and therefore, further improvement is needed.

SUMMERY OF THE UTILITY MODEL

In order to optimize the performance of K song stereo set, improve the audio processing ability of K song stereo set, this application provides an audio power amplifier circuit, K song stereo set and K song system for K song stereo set.

In a first aspect, the application provides an audio power amplifier circuit for karaoke sound, which adopts the following technical scheme:

the utility model provides an audio power amplifier circuit for K sings stereo set, includes OTT module, DSP module, preceding stage amplification module and power amplifier module, wherein:

the DSP module comprises a BP1048 audio processor, the DSP module is connected with the pre-stage amplification module, the DSP module is used for carrying out audio processing on an input audio signal and sending the audio signal after the audio processing to the pre-stage amplification module, the DSP module is electrically connected with the OTT module in a bidirectional way, and the DSP module is used for sending the audio signal after the audio processing to the OTT module;

the pre-stage amplification module is connected with the power amplification module, receives the audio-processed audio signal sent by the DSP module, and is used for amplifying the audio signal and sending the amplified audio signal to the power amplification module;

the OTT module comprises an RK3328 chip, an HDMI interface and a network interface are arranged on the OTT module, and the OTT module is used for sending an audio signal corresponding to a current song to be sung to the DSP module, receiving the audio signal processed by the DSP module, identifying the processed audio signal, and outputting a video or image signal corresponding to the audio signal through the HDMI interface.

By adopting the technical scheme, the OTT module adopts a RK3328 chip with strong performance, the DSP module adopts a BP1048 audio processor with rich functions, and under the matching action of the OTT module and the DSP module, the circuit is optimized to the greatest extent, and the audio processing capacity of the circuit is improved.

Optionally, the power amplifier module includes a first power amplifier module and a second power amplifier module, and the preceding stage amplifier module is connected with the first power amplifier module and the second power amplifier module respectively.

Through setting up first power amplifier module and second power amplifier module, arrange the position of first power amplifier module and second power amplifier module according to actual need to the sound position that goes out that corresponds to set up K song stereo set makes the sound of K song stereo set release have around the effect, is favorable to guaranteeing user's experience and feels.

Optionally, the first power amplifier module further includes a first post-filtering unit for performing filtering processing on the audio signal, and the second power amplifier module further includes a second post-filtering unit for performing filtering processing on the audio signal.

The first rear-stage filtering unit and the second rear-stage filtering unit are arranged to respectively filter the audio signals, so that the phenomena of burrs and the like of the audio signals are reduced, and the quality of the output audio signals is guaranteed.

Optionally, an audio input interface is arranged on the DSP module, and the audio input interface includes an analog audio signal input interface, a coaxial digital audio signal input interface, and a wireless microphone audio signal input interface.

Optionally, the mobile terminal further comprises an earphone operational amplifier module connected with the DSP module and a full-frequency audio signal output module connected with the earphone operational amplifier module.

Optionally, the power amplifier further comprises a power module, wherein the power module is used for supplying power to the power amplifier module, the DSP module, the pre-stage amplification module and the OTT module.

Optionally, the power module includes a voltage stabilizing unit, and the voltage stabilizing unit is configured to convert an externally input voltage into a working voltage and then respectively supply power to the OTT module and the DSP module.

Optionally, the DSP module, the power module, the pre-stage amplifying module, the power amplifier module, the earphone operational amplifier module, and the full-frequency audio signal output module are integrated on a main board.

In a second aspect, the application provides a karaoke sound adopts following technical scheme:

a K sings stereo set adopts an audio power amplifier circuit for the K sings stereo set as above.

In a third aspect, the karaoke system provided by the application adopts the following technical scheme:

a karaoke system comprises the karaoke sound box.

As can be seen from the above, the present application has the following beneficial technical effects: the OTT module adopts a RK3328 chip with strong performance, the DSP module adopts a BP1048 audio processor with rich functions, and under the matching action of the OTT module and the DSP module, the circuit is optimized to the maximum extent, and the audio processing capability of the circuit is improved.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

Fig. 1 is a schematic block diagram of an audio power amplifier circuit for karaoke audio provided in an embodiment of the present application.

Description of the reference numerals: 100. an OTT module; 200. a DSP module; 210. an analog audio signal input interface; 220. a coaxial digital audio signal input interface; 230. a wireless microphone audio signal input interface; 240. the earphone operational amplifier module; 250. a full-frequency audio signal output module; 300. an HDMI interface; 400. a power supply module; 410. a voltage stabilization unit; 500. a second power amplifier module; 510. a second post-stage filtering unit; 600. a first power amplifier module; 610. a first post-stage filtering unit; 700. a pre-amplification module; 800. a USB interface; 900. a network interface.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

Referring to fig. 1, an embodiment of The present application discloses an audio power amplifier circuit for a karaoke sound, including an OTT module 100 (OTT is an Over The Top, which means that an internet company crosses an operator to develop various video and data service services based on The open internet, The OTT module can provide a module for a user to perform activities such as software downloading and work uploading in an interactive environment with The internet), a DSP module 200, a pre-amplification module 700, and a power amplifier module, wherein The DSP module 200 employs a BP1048 audio processor, The DSP module 200 is connected to The pre-amplification module 700, The DSP module 200 is configured to perform audio processing on an input audio signal, send The audio signal after The audio processing to The pre-amplification module 700, The DSP module 200 is electrically connected to The OTT module 100 in a bidirectional manner, and The DSP module 200 is configured to send The audio signal after The audio processing to The OTT module 100. The pre-amplification module 700 is connected to the power amplifier module, the pre-amplification module 700 receives the audio signal after audio processing sent by the DSP module 200, and the pre-amplification module 700 is configured to amplify the audio signal and send the amplified audio signal to the power amplifier module. The OTT module 100 adopts an RK3328 chip, the OTT module 100 is provided with an HDMI interface 300, and the OTT module 100 is configured to send an audio signal corresponding to a current song to the DSP module 200, receive an audio signal after audio processing by the DSP module 200, perform identification processing on the processed audio signal, and output a video or image signal corresponding to the audio signal through the HDMI interface 300.

Specifically, the BP1048 audio processor in the embodiment of the present application is a Flash with a built-in memory of 16MB, and can store various EQ data (EQ is called equal in english, that is, an equalizer, and its basic function is to perform gain or attenuation on a certain frequency band or multiple frequency bands of a sound, so as to achieve the purpose of adjusting the tone, where the EQ data can be understood as tone data of an audio signal, and a user can perform various fine processing on the audio by matching with online debugging software, and the BP1048 audio processor has a built-in bluetooth function, and can implement bluetooth connection without additionally arranging a bluetooth module. In addition, the RK3328 chip adopted by the OTT module 100 in the embodiment of the present application is a low-power-consumption high-performance processor based on a Cortex-a53 architecture, which is developed by reycore corporation, and includes a 4-core Cortex-a53,64-bit CPU, which supports multi-format video codec, high-quality JPEG codec, and pre-processing and post-processing of special images. According to the application, the BP1048 audio processor is combined with the RK3328 chip, so that the circuit is optimized to the greatest extent, and the audio processing capacity of the circuit is improved.

Further, the power amplifier module includes a first power amplifier module 600 and a second power amplifier module 500, and the preceding stage amplification module 700 is connected to the first power amplifier module 600 and the second power amplifier module 500, respectively. Specifically, the pre-amplification module 700 receives the analog signals DAC _ L (left channel), DAC _ X (bass) and DAC _ R (right channel) processed by the DSP module 200, and adjusts the voltages of the analog signals to ranges acceptable by the first power amplifier module 600 and the second power amplifier module 500, and respectively transmits the adjusted voltages to the first power amplifier module 600 and the second power amplifier module 500.

Further, the first power amplifier module 600 further includes a first post-filtering unit 610 for filtering the audio signal, and the second power amplifier module 500 further includes a second post-filtering unit 510 for filtering the audio signal.

Further, the DSP module 200 is provided with an audio input interface, which includes an analog audio signal input interface 210, a coaxial digital audio signal input interface 220, and a wireless microphone audio signal input interface 230. Through the audio input interface who sets up, richened the audio input mode of circuit for the user can select according to actual need, and wireless microphone audio signal input does not receive the influence of input mode selection, consequently can all carry out K song or speech activity under arbitrary mode.

Further, the above audio power amplifier circuit for the karaoke sound further includes an earphone operational amplifier module 240 connected to the DSP module 200 and a full-frequency audio signal output module 250 connected to the earphone operational amplifier module 240.

Further, the above-mentioned audio power amplifier circuit for karaoke audio also includes power module 400, and power module 400 is used for supplying power for power amplifier module, DSP module 200, preceding stage amplifier module 700 and OTT module 100.

Further, the power module 400 includes a voltage stabilizing unit 410, and the voltage stabilizing unit 410 is configured to convert an externally input voltage into a working voltage and then respectively supply power to the OTT module 100 and the DSP module 200.

In this embodiment, the voltage of the external power received by the power module 400 is 20V and 10V, the power module 400 supplies power to the power amplifier module and the pre-amplifier module 700 by using 20V, and the voltage regulator 410 converts the 10V voltage into a working voltage of 5V and then supplies power to the OTT module 100 and the DSP module 200, respectively.

Further, DSP module 200, power module 400, preceding stage amplifier module 700, power amplifier module, earphone fortune is put module 240 and is fully frequency audio signal output module 250 integrated on a mainboard, has improved the integrated level of circuit to a certain extent, reduces unnecessary wire rod transmission structure, reduces wire rod transmission etc. and causes the condition emergence that the transport delay leads to the distortion to the signal, is favorable to guaranteeing the operational reliability of circuit, improves the performance of circuit.

Specifically, referring to fig. 1, in the embodiment of the present application, the OTT module 100 communicates with the DSP module 200 through an IIS interface and a UART serial port, the OTT module 100 is further connected with a network interface 900 for connecting to a wired network and a USB interface 800 for connecting to devices such as a USB disk, and specifically, the RK3328 chip adopted in the embodiment of the present application supports gigabit ethernet and USB3.0, which can completely meet the requirement of daily entertainment activities, and in addition, the OTT module 100 is further provided with a golden microphone system and a cibye voice remote control system, which can realize functions such as intelligent song ordering and voice remote control.

Further, this application embodiment still discloses a K sings stereo set, and this K sings stereo set adopts foretell an audio power amplifier circuit for K sings stereo set.

Further, this application embodiment still discloses a K sings the system, and this K sings the system and includes K sings stereo set, wireless microphone and display, specifically speaking, K sings the stereo set and adopts foretell an audio power amplifier circuit for K sings stereo set, and the display is connected with K sings the stereo set through foretell HDMI interface 300, and wireless microphone is connected with K sings the stereo set through foretell wireless microphone audio signal input interface 230.

In summary, in the present application, the OTT module 100 is configured, and the RK3328 chip is adopted to provide the DSP module 200 with a matched audio signal, such as an original audio or a vocal accompaniment audio, and meanwhile, the OTT module 100 can also output an image or a video signal corresponding to the audio signal in real time through the HDMI interface 300, so as to facilitate a user to watch lyrics or perform networking interaction, and the DSP module 200 is configured, and the BP1048 audio processor is adopted to perform fine processing and output on the input voice and the original audio or the vocal accompaniment audio, thereby providing a better user experience.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

What has been described above are but some of the embodiments of the present application. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications are intended to be included within the scope of the utility model.

Claims (10)

1. The utility model provides an audio power amplifier circuit for K sings stereo set, includes OTT module, DSP module, preceding stage amplification module and power amplifier module, its characterized in that:

the DSP module comprises a BP1048 audio processor, the DSP module is connected with the pre-stage amplification module, the DSP module is used for carrying out audio processing on an input audio signal and sending the audio signal after the audio processing to the pre-stage amplification module, the DSP module is electrically connected with the OTT module in a bidirectional way, and the DSP module is used for sending the audio signal after the audio processing to the OTT module;

the pre-stage amplification module is connected with the power amplification module, receives the audio signal after audio processing sent by the DSP module, and is used for amplifying the audio signal and sending the audio signal after the audio processing to the power amplification module;

the OTT module comprises an RK3328 chip, an HDMI interface and a network interface are arranged on the OTT module, and the OTT module is used for sending an audio signal corresponding to a current song to be sung to the DSP module, receiving the audio signal processed by the audio of the DSP module, identifying the audio signal processed by the audio, and outputting a video or image signal corresponding to the audio signal through the HDMI interface.

2. The audio power amplifier circuit for karaoke audio according to claim 1, wherein: the power amplifier module comprises a first power amplifier module and a second power amplifier module, and the preceding stage amplification module is respectively connected with the first power amplifier module and the second power amplifier module.

3. The audio power amplifier circuit for karaoke audio according to claim 2, wherein: the first power amplifier module further comprises a first post-filtering unit for filtering the audio signals, and the second power amplifier module further comprises a second post-filtering unit for filtering the audio signals.

4. The audio power amplifier circuit for karaoke audio of claim 1, characterized in that: the DSP module is provided with an audio input interface, and the audio input interface comprises an analog audio signal input interface, a coaxial digital audio signal input interface and a wireless microphone audio signal input interface.

5. The audio power amplifier circuit for karaoke audio according to claim 1, wherein: the system also comprises an earphone operational amplifier module connected with the DSP module and a full-frequency audio signal output module connected with the earphone operational amplifier module.

6. The audio power amplifier circuit for karaoke sound of claim 5, wherein: still include power module, power module be used for give the power amplifier module the DSP module the preceding stage is enlarged the module and the OTT module power supply.

7. The audio power amplifier circuit used for karaoke audio according to claim 6, characterized in that: the power module comprises a voltage stabilizing unit, and the voltage stabilizing unit is used for converting the voltage input from the outside into working voltage and then respectively supplying power to the OTT module and the DSP module.

8. The audio power amplifier circuit for karaoke audio according to claim 7, wherein: the DSP module, the power module, the preceding stage amplification module, the power amplification module, the earphone operational amplification module and the full-frequency audio signal output module are integrated on a mainboard.

9. A karaoke sound device, characterized in that, an audio power amplifier circuit for the karaoke sound device according to any one of claims 1 to 8 is adopted.

10. A karaoke system, characterized by: comprising a karaoke sound as claimed in claim 9.

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