Vehicle-mounted built-in karaoke module

Abstract

An embodiment of the utility model discloses a vehicle-mounted built-in karaoke module which comprises an input interface, a karaoke digital audio processing circuit, a power management circuit and an output interface, the karaoke digital audio processing circuit is electrically connected with the input interface, the power management circuit and the output interface, and the power management circuit is electrically connected with the input interface. The karaoke digital audio processing circuit comprises a digital audio processing chip, and the digital audio processing chip is integrated with an oscillator, a locked loop, a programmable amplifier, an audio ADC, a digital signal processor, an audio DAC and a power amplifier. The device is simple in structure, can be directly attached to a mainboard of a vehicle-mounted back-row entertainment system host, is fused with a back-row entertainment karaoke system, and can realize real-time adjustment operation on the back-row entertainment system host.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle-mounted electronics, especially to a vehicle-mounted built-in karaoke module. BACKGROUND

[0002] With the development trend of the vehicle-mounted rear row entertainment system, the karaoke system of the vehicle-mounted rear row entertainment has become one of the main entertainment functions, in the prior art, the karaoke function is basically realized by using two external microphones with a karaoke function, and additionally installing a software APP, and the basic function adjustment still needs to be operated through the mobile phone APP, and the operation experience is relatively complex, and the function and effect are less. UTILIT Y MODEL CONTENT

[0003] The utility model embodiment solves the technical problem that a vehicle-mounted built-in karaoke module is provided, so as to be used in cooperation with the karaoke system of the vehicle-mounted rear row entertainment, and facilitate real-time adjustment operation on the rear row entertainment system host.

[0004] In order to solve the above technical problems, the utility model embodiment provides a vehicle-mounted built-in karaoke module, which comprises an input interface, a karaoke digital audio processing circuit, a power management circuit and an output interface, the karaoke digital audio processing circuit is electrically connected with the input interface, the power management circuit and the output interface, the power management circuit is electrically connected with the input interface, the karaoke digital audio processing circuit comprises a digital audio processing chip, and the digital audio processing chip is integrated with an oscillator, a lock item ring, a programmable amplifier, an audio ADC, a digital signal processor, an audio DAC and a power amplifier.

[0005] Further, the power management circuit adopts an LDO power chip with an output voltage of 3V3.

[0006] Further, it further comprises an external crystal oscillator, and the external crystal oscillator is electrically connected with the karaoke digital audio processing circuit.

[0007] The utility model has the advantages that the utility model is simple in structure, can be directly attached to the mainboard of the vehicle-mounted rear row entertainment system host, is integrated with the karaoke system of the rear row entertainment, and can realize real-time adjustment operation on the rear row entertainment system host. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 It is the structure block diagram of the vehicle-mounted built-in karaoke module of the utility model embodiment.

[0009] Fig. 2 It is the circuit diagram of the input interface and the output interface of the utility model embodiment.

[0010] Fig. 3 is a circuit diagram of the karaoke digital audio processing circuit of the embodiment of the utility model.

[0011] Fig. 4 is a circuit diagram of the power management circuit of the embodiment of the utility model. DETAILED DESCRIPTION

[0012] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict, and the utility model will be further described in detail in combination with the drawings and specific embodiments.

[0013] In the embodiment of the utility model, if there is a directional indication (such as up, down, left, right, front, back, etc.), it is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indication also changes accordingly.

[0014] In addition, in the utility model, if the description of "first", "second" and the like is only used for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0015] Please refer to Figs. 1-4 The vehicle-mounted built-in karaoke module of the embodiment of the utility model comprises an input interface, a karaoke digital audio processing circuit, a power management circuit, and an output interface.

[0016] The karaoke digital audio processing circuit is electrically connected with the input interface, the power management circuit, and the output interface, and the power management circuit is electrically connected with the input interface. In actual application, the input interface and the output interface are usually integrated together.

[0017] The karaoke digital audio processing circuit includes a digital audio processing chip. This chip requires only simple peripheral circuitry to easily implement all functions from audio data acquisition and audio algorithm processing to analog audio output; it features low power consumption and high performance. The digital audio processing chip integrates an oscillator, a PLL, a programmable amplifier (PGA), an audio ADC, a digital signal processor (DSP), an audio DAC, and a Class AB power amplifier. It also has a built-in 4M bit of FLASH memory, allowing modification of the internal program and algorithms via a UART serial port. The chip's built-in high-performance DSP is powerful and includes multiple algorithms. It can implement functions such as Auto Tune, Pitch Shift, Howling Suppressing, Frequency Shift, Echo, Reverb, Equalizer, Dry / Wet Output Selection, Vocal Cut, Surround Effect, Music Ducking, MP3 Decoding Output, Dynamic Range Compression (DRC), Noise Gate, Mixer, and Left / Right Channel Signal Swap. Further algorithm expansion and customization of client programs are possible through FLASH. FLASH can also store various sound effects and prompts, and automatically saves the sound effect configuration from the last shutdown.

[0018] In one implementation, the power management circuit uses a single LDO power chip to output a 3V3 voltage to power all circuits in the module.

[0019] As one implementation, the in-vehicle built-in karaoke module also includes an external crystal oscillator (XTAL), which is electrically connected to the karaoke digital audio processing circuit.

[0020] The working principle of this utility model is as follows: After receiving the stereo analog audio (song accompaniment audio and two microphone audio) signal transmitted from the rear entertainment system host through the input interface, this utility model processes the signal through the karaoke digital audio processing circuit and outputs a digital audio signal (I2S) or a stereo analog audio signal, and then sends it to the rear entertainment system host power amplifier circuit through the output interface for audio amplification to drive the speaker to produce sound.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An in-vehicle built-in Karaoke module, characterized by, The karaoke digital audio processing circuit is electrically connected with the input interface, the power management circuit and the output interface.

2. The in-vehicle built-in Karaoke module of claim 1, wherein, The power management circuit adopts an LDO power chip outputting 3V3 voltage.

3. The in-vehicle built-in Karaoke module of claim 1, wherein, The karaoke digital audio processing circuit is also electrically connected with an external crystal oscillator.

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