Wireless karaoke system

Abstract

The utility model discloses a wireless karaoke system. The wireless karaoke system comprises a mainboard and a connector board. The mainboard comprises a DSP processing unit, a Bluetooth processing unit, a WiFi unit, a voltage conversion unit and a power amplification unit, the DSP processing unit is used for receiving and processing audio signals and then inputting the audio signals into the power amplification unit, and the WiFi unit is used for transmitting interaction data to the Bluetooth processing unit; the Bluetooth processing unit is used for receiving a Bluetooth signal and sending interaction data and / or the Bluetooth signal to the DSP processing unit, and the voltage conversion unit is respectively connected with the power amplifier unit and the DSP processing unit; the connector board comprises a microphone unit and a charging unit, the microphone unit is used for generating audio signals after pickup, and the charging unit is connected with the voltage conversion unit. The signal is transmitted through the WiFi unit and the Bluetooth processing unit, the audio delay is reduced, the audio signal is processed through the DSP processing unit, the tone quality of the karaoke system is improved, and the karaoke system can be widely applied to the technical field of audio frequency.

Description

Technical Field

[0001] The utility model relates to the technical field of audio frequency, in particular to a wireless karaoke system. Background Art

[0002] The current karaoke system is mainly based on home KTV equipment. Such equipment generally includes an audio input device and an audio output device. However, the existing karaoke system has problems of audio delay and poor sound quality. Utility Model Content

[0003] In view of this, an object of an embodiment of the present utility model is to provide a wireless karaoke system that can improve the sound quality of the karaoke system and reduce audio delay.

[0004] In a first aspect, an embodiment of the utility model provides a wireless karaoke system, including a main board and a connector board;

[0005] The mainboard includes a DSP processing unit, a Bluetooth processing unit, a WiFi unit, a voltage conversion unit and a power amplifier unit. The DSP processing unit is used to receive and process the audio signal and then input it into the power amplifier unit. The WiFi unit is used to transmit interactive data to the Bluetooth processing unit. The interactive data represents the transmission data between multiple devices in the wireless karaoke system. The Bluetooth processing unit is used to receive Bluetooth signals and send the interactive data and / or the Bluetooth signals to the DSP processing unit. The voltage conversion unit is connected to the power amplifier unit and the DSP processing unit respectively.

[0006] The connector board includes a microphone unit and a charging unit. The microphone unit is used to generate the audio signal after picking up sound, and the charging unit is connected to the voltage conversion unit.

[0007] Optionally, the voltage conversion unit includes a boost circuit and a buck circuit, the input end of the boost circuit is connected to the charging unit, the output end of the boost circuit is connected to the power amplifier unit, the input end of the buck circuit is connected to the charging unit, and the output end of the buck circuit is respectively connected to the DSP processing unit and the Bluetooth processing unit.

[0008] Optionally, the Bluetooth processing unit includes a U-segment signal receiving circuit and a Bluetooth transceiver circuit, and both the Bluetooth transceiver circuit and the U-segment signal receiving circuit are connected to the DSP processing unit.

[0009] Optionally, the step-down circuit includes a chip STI3470 and a peripheral circuit of the chip STI3470.

[0010] Optionally, the boost circuit includes a chip FP5207 and a peripheral circuit of the chip FP5207.

[0011] Optionally, the Bluetooth transceiver circuit includes a chip BP1048B1 and a peripheral circuit of the chip BP1048B1, the peripheral circuit of the chip BP1048B1 includes a Bluetooth antenna, and the Bluetooth antenna is connected to the chip BP1048B1.

[0012] Optionally, the U-segment signal receiving circuit includes a chip U1R32D and a peripheral circuit of the chip U1R32D.

[0013] Optionally, the DSP processing unit includes a chip BP1048B2 and a peripheral circuit of the chip BP1048B2.

[0014] Optionally, the microphone unit includes a microphone circuit and a microphone amplifier circuit, the microphone circuit is used to generate the audio signal after picking up sound, and the microphone amplifier circuit is used to amplify the audio signal.

[0015] Optionally, the DSP processing unit is connected to an indicator light unit.

[0016] The implementation of the utility model embodiment includes the following beneficial effects: the utility model embodiment provides a wireless karaoke system, including a main board and a connector board; the main board includes a DSP processing unit, a Bluetooth processing unit, a WiFi unit, a voltage conversion unit and a power amplifier unit, the DSP processing unit is used to receive and process the audio signal and then input it into the power amplifier unit, the WiFi unit is used to transmit the interactive data to the Bluetooth processing unit, the interactive data represents the transmission data between multiple devices in the wireless karaoke system, the Bluetooth processing unit is used to receive the Bluetooth signal and send the interactive data and / or the Bluetooth signal to the DSP processing unit, the voltage conversion unit is connected to the power amplifier unit and the DSP processing unit respectively; the connector board includes a microphone unit and a charging unit, the microphone unit is used to generate the audio signal after picking up the sound, and the charging unit is connected to the voltage conversion unit. The transmission of the signal by the WiFi unit and the Bluetooth processing unit reduces the audio delay, and the audio signal is processed by the DSP processing unit, which improves the sound quality of the karaoke system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural block diagram of a wireless karaoke system provided by an embodiment of the utility model;

[0018] Figure 2 It is a circuit schematic diagram of a DSP processing unit provided by an embodiment of the utility model;

[0019] Figure 3 It is a circuit schematic diagram of a Bluetooth transceiver circuit provided by an embodiment of the utility model;

[0020] Figure 4 It is a circuit schematic diagram of a U-segment signal receiving circuit provided by an embodiment of the utility model;

[0021] Figure 5 It is a circuit principle diagram of a boost circuit provided by an embodiment of the utility model;

[0022] Figure 6 It is a circuit schematic diagram of a step-down circuit provided by an embodiment of the utility model;

[0023] Figure 7 is a circuit schematic diagram of a microphone circuit provided by an embodiment of the utility model;

[0024] Figure 8 It is a circuit principle diagram of a microphone amplifier circuit provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0027] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, unless otherwise specified, "plurality" means two or more.

[0028] First, refer to Figure 1 , the embodiment of the utility model provides a wireless karaoke system, including a main board and a connector board;

[0029] The mainboard includes a DSP processing unit, a Bluetooth processing unit, a WiFi unit, a voltage conversion unit and a power amplifier unit. The DSP processing unit is used to receive and process the audio signal and then input it into the power amplifier unit. The WiFi unit is used to transmit interactive data to the Bluetooth processing unit. The interactive data represents the transmission data between multiple devices in the wireless karaoke system. The Bluetooth processing unit is used to receive Bluetooth signals and send the interactive data and / or the Bluetooth signals to the DSP processing unit. The voltage conversion unit is connected to the power amplifier unit and the DSP processing unit respectively.

[0030] The connector board includes a microphone unit and a charging unit. The microphone unit is used to generate the audio signal after picking up sound, and the charging unit is connected to the voltage conversion unit.

[0031] Specifically, the main board is a processing main board of the karaoke system, and a DSP processing unit, a Bluetooth processing unit, a WiFi unit, a voltage conversion unit and a power amplifier unit are arranged on the main board. The connector board is a rechargeable interface processing board for the microphone of the karaoke system, which processes the audio signal input by the microphone and then inputs it into the DSP processing unit, which processes the audio signal accordingly and then outputs it to the power amplifier unit, which amplifies the audio signal and then outputs it through the speaker. The charging unit inputs the voltage into the voltage conversion unit, which converts the voltage into a voltage of corresponding magnitude and inputs the converted voltage into the DSP processing unit, the Bluetooth processing unit, the WiFi unit and the power amplifier unit. The Bluetooth processing unit has the characteristics of low power consumption and strong anti-interference, and is mainly responsible for the transmission of interactive data and WiFi audio verification data between multiple devices in the karaoke system. The WiFi unit has the characteristics of high speed and low latency, and can cope with high-speed, large transmission, and high-quality connection scenarios, and is mainly responsible for the audio transmission between multiple devices in the karaoke system. The signal is transmitted through the WiFi unit and the Bluetooth processing unit, which reduces the audio delay, and the audio signal is processed by the DSP processing unit, which improves the sound quality of the karaoke system.

[0032] In some optional real-time examples, the DSP processing unit includes a chip BP1048B2 and a peripheral circuit of the chip BP1048B2.

[0033] Specifically, refer to Figure 2The chip BP1048B2 is a high-performance 32-bit DSP Bluetooth audio application processing chip that can be applied to various Bluetooth audio and voice application products and can achieve efficient audio processing. The DSP processing unit receives the audio signal input from the microphone unit through pin 43 (MIC_IN) of the chip BP1048B2, and outputs the processed audio signal to the power amplifier unit through pin 46 (DAC_R) and pin 47 (DAC_L) of the chip BP1048B2; is connected to the Bluetooth processing unit through pin 38 (SW_CLK) and pin 39 (SW_DAT) of the chip BP1048B2; is connected to the voltage conversion unit through pins 2, 13 and 14 of the chip BP1048B2; filters the power supply noise through resistor R2 and capacitors C51 and C11 and then inputs it to pin 2 of the chip BP1048B2, and outputs the audio signal to the power amplifier unit after filtering the noise through C123 and C122; filters the power supply noise through resistor FB2 and capacitors C10, C50, C14, C54, C16, and C55 and then inputs it to pins 13 and 14 of the chip BP1048B1.

[0034] In some optional real-time examples, the Bluetooth processing unit includes a U-segment signal receiving circuit and a Bluetooth transceiver circuit, and both the Bluetooth transceiver circuit and the U-segment signal receiving circuit are connected to the DSP processing unit.

[0035] In some optional real-time examples, the Bluetooth transceiver circuit includes a chip BP1048B1 and a peripheral circuit of the chip BP1048B1, the peripheral circuit of the chip BP1048B1 includes a Bluetooth antenna, and the Bluetooth antenna is connected to the chip BP1048B1.

[0036] Specifically, refer to Figure 3 The pin 11 of the Bluetooth transceiver circuit chip BP1048B1 is connected to a Bluetooth antenna, and the Bluetooth broadcast signal is received through the Bluetooth antenna. The power supply noise is filtered through the resistor wire FB1, capacitors C1, C44, C5, C48, C7, and C49, and then input to the pins 13 and 14 of the chip BP1048B2; the power supply noise is filtered through the resistor R1, capacitors C45 and C2, and then input to the pin 2 of the chip BP1048B1; the pins 38 (SW_CLK) and pins 39 (SW_DAT) of the chip BP1048B1 are respectively connected to the pins 38 (SW_CLK) and pins 39 of the chip BP1048B2.

[0037] (SW_DAT); connected to the WiFi unit through pin 31 (DO_WIFI) of chip BP1048B1.

[0038] In some optional embodiments, the U-segment signal receiving circuit includes a chip U1R32D and a chip U1R32D peripheral circuit.

[0039] Specifically, refer to Figure 4 , chip U1R32D is a receiving chip for wireless audio transmission, which cooperates with the wireless transmitting chip to complete high-quality wireless audio transmission. The RF working range is between 500M and 980MHz. The single chip has high integration and good cost performance. It is suitable for wireless karaoke systems, wireless audio transmission and broadcasting systems, etc. The chip U1R32D antenna UANT receives the U-band signal (signal within the frequency of 300MHz-3000MHz), which is filtered and processed by capacitors C141, C142, C177 and C178 and input to pin 5 of chip U1R32D; capacitors C62, C64, C21, C65, C181, C66 and capacitor C22 filter the interference noise of pins 9, 10, 12, 13 and 14 respectively. The clock signal is input to pins 29 and 30 of chip U1R32D through clock crystal oscillator Y3; it is connected to pin 21 (D1_U) of chip BP1048B2 through pin 22 (D1_U) of chip U1R32D, connected to pin 20 (BCLK_U) of chip BP1048B2 through pin 23 (BCLK_U) of chip U1R32D, and connected to pin 19 (LRCK_U) of chip BP1048B2 through pin 24 (LRCK_U) of chip U1R32D, thereby sending the processed U-band signal to chip BP1048B2.

[0040] In some optional real-time examples, the voltage conversion unit includes a boost circuit and a buck circuit, the input end of the boost circuit is connected to the charging unit, the output end of the boost circuit is connected to the power amplifier unit, the input end of the buck circuit is connected to the charging unit, and the output end of the buck circuit is respectively connected to the DSP processing unit and the Bluetooth processing unit.

[0041] In some optional embodiments, the boost circuit includes a chip FP5207 and a peripheral circuit of the chip FP5207.

[0042] Specifically, refer to Figure 5, terminal 12V is connected to the charging unit, receives the 12V DC voltage of the charging unit, and after filtering through capacitor C78, ​​resistor R120 and resistor R121, it is input to pin 7 of chip FP5207 after voltage stabilization through capacitor C32; the voltage signal output by pin 8 of chip FP5207 is amplified by MOS tube M3, and then processed by transistor M2 (when M3 is turned off, M is turned on to provide an inductor discharge loop), and the output voltage is filtered through capacitors C84, C33, C34 and EC9, and input to the power amplifier unit through terminal AMP_VCC. Energy storage and filtering are performed through inductor L7; the output voltage is set through voltage divider resistors R151 and R150; C80, C182, R113, R149 and C216 form a compensation circuit.

[0043] In some optional embodiments, the step-down circuit includes a chip STI3470 and a peripheral circuit of the chip STI3470.

[0044] Specifically, refer to Figure 6 The chip STI3470 pin 5 receives the 12V DC voltage of the charging unit, and filters the input voltage through capacitors C29, C30, and C81. The chip STI3470 pin 6 outputs the stepped-down voltage, and after processing by other peripheral circuit components, a 5V output voltage is obtained.

[0045] In some optional embodiments, the microphone unit includes a microphone circuit and a microphone amplifier circuit, the microphone circuit is used to generate the audio signal after picking up sound, and the microphone amplifier circuit is used to amplify the audio signal.

[0046] Reference Figure 7 , the microphone circuit generates an audio signal after picking up sound through microphone J11 and inputs it into J32; refer to Figure 8 , CON12 of the microphone amplifier circuit is connected to J32, and the audio signal is processed by FB37, R60, C202, and R61 and then input into pin 4 of the amplifier chip RS721. After amplification, the chip RS721 outputs the audio signal through pin 1 to the endpoint MIC_IN, and the endpoint MIC_IN transmits the audio signal to pin 43 (MIC_IN) of the chip BP1048B2.

[0047] In some optional embodiments, the DSP processing unit is connected to an indicator light unit.

[0048] Specifically, the DSP processing unit outputs a corresponding electrical signal to the indicator light unit, thereby driving the indicator light unit to flash a light of a corresponding color.

[0049] The implementation of the utility model embodiment includes the following beneficial effects: the utility model embodiment provides a wireless karaoke system, including a main board and a connector board; the main board includes a DSP processing unit, a Bluetooth processing unit, a WiFi unit, a voltage conversion unit and a power amplifier unit, the DSP processing unit is used to receive and process the audio signal and then input it into the power amplifier unit, the WiFi unit is used to transmit the interactive data to the Bluetooth processing unit, the interactive data represents the transmission data between multiple devices in the wireless karaoke system, the Bluetooth processing unit is used to receive the Bluetooth signal and send the interactive data and / or the Bluetooth signal to the DSP processing unit, the voltage conversion unit is connected to the power amplifier unit and the DSP processing unit respectively; the connector board includes a microphone unit and a charging unit, the microphone unit is used to generate the audio signal after picking up the sound, and the charging unit is connected to the voltage conversion unit. The transmission of the signal by the WiFi unit and the Bluetooth processing unit reduces the audio delay, and the audio signal is processed by the DSP processing unit, which improves the sound quality of the karaoke system.

[0050] In the description of this specification, the description with reference to the term "in a specific embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A wireless karaoke system, characterized in that: Including main board and connector board; The mainboard includes a DSP processing unit, a Bluetooth processing unit, a WiFi unit, a voltage conversion unit and a power amplifier unit. The DSP processing unit is used to receive and process the audio signal and then input it into the power amplifier unit. The WiFi unit is used to transmit interactive data to the Bluetooth processing unit. The interactive data represents the transmission data between multiple devices in the wireless karaoke system. The Bluetooth processing unit is used to receive Bluetooth signals and send the interactive data and / or the Bluetooth signals to the DSP processing unit. The voltage conversion unit is connected to the power amplifier unit and the DSP processing unit respectively. The connector board includes a microphone unit and a charging unit. The microphone unit is used to generate the audio signal after picking up sound, and the charging unit is connected to the voltage conversion unit.

2. The wireless karaoke system according to claim 1, characterized in that: The voltage conversion unit includes a boost circuit and a buck circuit, the input end of the boost circuit is connected to the charging unit, the output end of the boost circuit is connected to the power amplifier unit, the input end of the buck circuit is connected to the charging unit, and the output end of the buck circuit is respectively connected to the DSP processing unit and the Bluetooth processing unit.

3. The wireless karaoke system according to claim 1, characterized in that: The Bluetooth processing unit includes a U-segment signal receiving circuit and a Bluetooth transceiver circuit, and both the Bluetooth transceiver circuit and the U-segment signal receiving circuit are connected to the DSP processing unit.

4. The wireless karaoke system according to claim 2, characterized in that: The step-down circuit includes a chip STI3470 and a peripheral circuit of the chip STI3470.

5. The wireless karaoke system according to claim 2, characterized in that: The boost circuit includes a chip FP5207 and a peripheral circuit of the chip FP5207.

6. The wireless karaoke system according to claim 3, characterized in that: The Bluetooth transceiver circuit includes a chip BP1048B1 and a peripheral circuit of the chip BP1048B1. The peripheral circuit of the chip BP1048B1 includes a Bluetooth antenna, and the Bluetooth antenna is connected to the chip BP1048B1.

7. The wireless karaoke system according to claim 3, characterized in that: The U-segment signal receiving circuit includes a chip U1R32D and a peripheral circuit of the chip U1R32D.

8. The wireless karaoke system according to claim 1, characterized in that: The DSP processing unit includes a chip BP1048B2 and a peripheral circuit of the chip BP1048B2.

9. The wireless karaoke system according to claim 1, characterized in that: The microphone unit includes a microphone circuit and a microphone amplifier circuit. The microphone circuit is used to generate the audio signal after picking up sound, and the microphone amplifier circuit is used to amplify the audio signal.

10. The wireless karaoke system according to claim 1, characterized in that: The DSP processing unit is connected with an indicator light unit.

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