Remote control circuit for voice-controlled CD player

Abstract

To provide a remote control circuit for a voice-controlled CD player, which realizes dual control by voice and buttons, improves operation convenience, is network-independent, highly stable, and easy to upgrade. [Solution] The remote control circuit for a voice-controlled CD player includes a power supply module that provides stable voltage, an input module including a metal dome 1 and an electret microphone 2 that receive manual and voice commands respectively, a voice recognition module that performs offline recognition of voice commands, a control module that processes the commands and sends them to a wireless transmission module, a memory module, the wireless transmission module that sends control signals to the CD player, a display module that displays the operating status, and a software upgrade module that supports system upgrades.

Description

[Technical Field]

[0001] This application relates to a remote control circuit, and more particularly to a remote control circuit for a voice-controlled CD player. [Background technology]

[0002] In the consumer electronics field, CD players, as a typical audio playback carrier, have long relied on traditional button-type remote controls, that is, infrared light-emitting diode (IRD) radiation to achieve functional operation. Although such remote controls can input commands through physical buttons and meet basic operational needs, they have obvious limitations in practical use. For example, when driving, tidying up, or operating remotely, it is extremely inconvenient to manually search for and press buttons, which greatly affects the user experience.

[0003] With the development of voice interaction technology, the market demand for voice control of CD players is increasing, but existing CD player remote controls are still limited to button control and lack mature solutions that integrate voice recognition.From a circuit design perspective, achieving voice control requires building a complete circuit system including voice collection, recognition, and command transmission, arranging a stable, multi-voltage output power supply module to power components with different power consumption, such as the voice recognition chip, MCU, and wireless transmission module, designing a high-sensitivity, low-noise voice collection circuit to accurately capture user voice commands, and introducing an offline voice recognition chip to avoid response delays and usage limitations due to network dependency.Furthermore, a memory module for storing voice models and command data, a wireless transmission module to ensure stable transmission of control signals to the CD player, and a software upgrade module to meet the needs of function iteration are also required.

[0004] Conventional technologies do not systematically design circuits to meet the voice control needs of CD player remote controls, making it difficult to provide users with a convenient and stable voice control experience and adapting to the trend of CD player function expansion and technological upgrades. Summary of the Invention [Problem to be solved by the invention]

[0005] The purpose of this application is to provide a voice-controlled CD player remote control circuit to solve the problem that existing CD player remote controls rely only on button control, which is inconvenient when your hands are full or when you are far away. [Means for solving the problem]

[0006] To achieve the above objectives, this application provides the following technical solutions: A remote control circuit for a voice-controlled CD player, including: a power supply module, the power supply module being used to supply an operating voltage to the remote control circuit; an input module, including a metal dome and an electret microphone, wherein the metal dome is used to receive manual button commands, and the electret microphone is used to collect voice commands; a voice recognition module, the voice recognition module being connected to the electret microphone, the voice recognition module being used to recognize the collected voice commands offline; a control module, the control module being electrically connected to the metal dome and the voice recognition module respectively, the control module being used to receive and process commands after button and voice recognition; a memory module, the memory module coupled to the voice recognition module, the memory module being used to store voice recognition data and configuration information; The device includes a wireless transmitting module and a transmitting chip, the wireless transmitting module is electrically connected to the control module, the wireless transmitting module is used to externally transmit signals to a CD player, and a wireless receiving module is disposed in the CD player; The display module includes a LED indicator light, and is connected to the voice recognition module, and is used to display the operation and recognition status of the circuit.

[0007] As a preferred solution for the remote control circuit of the voice-controlled CD player, the power supply module includes a dry battery, a first DC / DC converter circuit with model number AiP4004, a 3.3V constant voltage circuit and a second DC / DC converter circuit with model number SY8089; The dry cell battery outputs a 3V voltage, which is converted by the first DC / DC converter circuit, model number of which is AiP4004, and stabilized by the 3.3V constant voltage circuit to output a 3.3V voltage; The second DC / DC converter circuit, model number SY8089, converts the voltage to 1.2V and supplies power to the voice recognition module.

[0008] As a preferred solution for the remote control circuit of a voice-controlled CD player, the electret microphone includes MIC_P and MIC_N pins, and transmits the collected voice signal to the voice recognition module through a filtering circuit and a voltage divider circuit made of resistors and capacitors.

[0009] As a preferred solution for the remote control circuit of the voice-controlled CD player, the voice recognition module uses the Hummingbird series US513, JieLi series JL701 / AC695, ShanJing series AP8064, Ruixin series RK2108, Qiying TaiLun series or CodaXinFly series offline voice recognition chip, and the memory module uses the non-volatile flash memory chip of model number GD25Q32ESIG. The offline speech recognition chip is connected to a non-volatile flash memory chip with model number GD25Q32ESIG via an SPI bus, which has pins SPI_SCLK, SPI_MOSI, SPI_MISO, and SPI_CS_N.

[0010] As a preferred solution for the remote control circuit of the voice-controlled CD player, the control module adopts an MCU with model number UST2030, and multiple pins of the MCU are connected to the metal dome to receive commands triggered by different buttons, and the PB6 / PWM / CIN4 pin of the MCU is connected to the TX terminal of the wireless transmitting module through a 1K resistor to transmit control signals.

[0011] As a preferred solution for the remote control circuit of the voice-controlled CD player, the wireless transmitting module uses a transmitting chip with model number XL4456, the XOUT and XIN pins of the transmitting chip are connected to a 13.56M crystal oscillator and a 22P capacitor to form an oscillator circuit, the PAOUT pin of the transmitting chip is connected to the ANT antenna via a network consisting of inductors L1, L2, L8 and capacitors C3, C4, C9, C10, C11 and C12 to transmit signals, and the DIN pin of the transmitting chip receives the command signal transmitted from the PB5 / PWM / INT0 pin of the control module.

[0012] As a preferred solution for the voice controlled CD player remote control circuit, the LED indicator light of the display module is connected to the LED_GREEN_CTL pin of the voice recognition module through resistor R55 to indicate that the remote control is working properly and prompt the user that a button or voice command has been sent to the CD player.

[0013] A preferred solution for the remote control circuit of the voice-controlled CD player further includes a software upgrade module, which adopts a UART Update port, and the DB_TXD and DB_RXD pins of the UART Update port are connected to the corresponding serial port pins of the voice recognition module. [Effects of the Invention]

[0014] The present application has the following advantages:

[0015] First, it realizes dual control modes of voice and button, allowing users to input voice commands through the electret microphone or operate manually using the metal dome, making it flexible for different usage scenarios and easy to operate.

[0016] Second, it uses an offline voice recognition chip, which allows voice recognition without using a network, resulting in quick response, no restrictions imposed by the network environment, and stable command processing.

[0017] Third, the power supply module includes multiple stable voltages to meet the power supply needs of different modules and ensure stable operation of the entire circuit.The wireless transmission module stably transmits control signals, effectively filters and divides voltages, reduces noise interference, improves the accuracy of voice recognition and signal transmission, and improves the reliability of communication between the remote control and the CD player. [Brief explanation of the drawings]

[0018] In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following briefly describes the drawings necessary for describing the embodiments or the prior art. Obviously, the drawings in the following description are merely examples, and those skilled in the art can derive other implementation drawings from the provided drawings without creative work.

[0019] The structures, proportions, sizes, etc. described in this specification are used in accordance with the contents of the specification so that those skilled in the art can read and understand them, and do not limit the conditions under which this application can be implemented, and have no substantial technical meaning. Furthermore, any modifications to the structure, changes in proportional relationships, or adjustments to the size are within the scope of the technical content disclosed in this application, as long as they do not affect the possible effects and achievable purposes of this application.

[0020] [Figure 1] 1 is a schematic diagram of a remote control circuit structure of a voice-controlled CD player provided by an embodiment of the present application; [Figure 2] 1 is a diagram of a first DC / DC conversion circuit whose model number is AiP4004 provided in an embodiment of the present application. [Figure 3] The embodiment of the present application provides a second DC / DC conversion circuit diagram with model number SY8089. [Figure 4] FIG. 1 is a circuit diagram of an electret microphone provided by an embodiment of the present application. [Figure 5] FIG. 1 is a circuit diagram of an offline voice recognition chip provided by an embodiment of the present application. [Figure 6] The embodiment of this application provides a circuit diagram of a non-volatile flash memory chip whose model number is GD25Q32ESIG. [Figure 7] The embodiment of the present application provides a circuit diagram of an MCU whose model number is UST2030. [Figure 8] The embodiment of this application provides a circuit diagram of a transmitter chip with model number XL4456. [Figure 9] 1 is a circuit diagram of an LED indicator light provided by an embodiment of the present application. [Figure 10] FIG. 2 is a circuit diagram of a UART Update port provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, the embodiments of the present application will be described with reference to specific examples. Those skilled in the art can easily understand other advantages and effects of the present application based on the contents disclosed herein. Obviously, the examples described herein are only a part of the examples of the present application, but not all of the examples. All other examples that can be obtained by those skilled in the art based on the examples of the present application without any creative work are the subject of protection of the present application.

[0022] As shown in FIG. 1, an embodiment of the present application provides a remote control circuit for a voice-controlled CD player, which includes:

[0023] Power supply module: The power supply module is used to supply the operating voltage to the remote control circuit. The power supply module converts the voltage of the dry battery 5 through a conversion circuit to a stable voltage of different specifications, so as to meet the different voltage requirements of each module in the circuit and ensure that each component operates stably under the rated voltage.

[0024] The input module includes a metal dome 1 and an electret microphone 2. The metal dome 1 is used to receive manual button commands, and the electret microphone 2 is used to collect voice commands. The metal dome 1 triggers the opening and closing of a circuit when pressed, converting mechanical movement into an electrical signal. The electret microphone 2 converts the acoustic signal into a weak electrical signal based on the electro-acoustic conversion principle, thereby realizing the collection of voice commands.

[0025] A voice recognition module is connected to the electret microphone 2, and is used to recognize collected voice commands offline. After receiving the voice electrical signal transmitted by the electret microphone 2, the voice recognition module processes the signal through an integrated existing language recognition algorithm, performs feature extraction and matching, and recognizes the voice command locally, without requiring an external network.

[0026] Control module: The control module is electrically connected to the metal dome 1 and the voice recognition module respectively, and the control module is used to receive and process commands after button and voice recognition. The control module receives the electrical signal of the metal dome 1 and the recognition result of the voice recognition module, performs logic judgment and command conversion, and generates and sends corresponding control signals to the wireless transmission module.

[0027] a memory module connected to the voice recognition module, the memory module being used to store voice recognition data and configuration information, and storing data such as models, command libraries, and user configurations required for voice recognition, allowing the voice recognition module to quickly retrieve the data for recognition processing and ensuring that the data will not be lost even when the power is turned off;

[0028] The CD player includes a wireless transmitting module and a transmitting chip 3, the wireless transmitting module is electrically connected to the control module, and the wireless transmitting module is used to externally transmit signals to the CD player. A wireless receiving module is disposed in the CD player, which receives the control signal transmitted from the control module, modulates and amplifies the signal via the transmitting chip 3, and wirelessly transmits it via an antenna to realize remote control of the CD player.

[0029] The display module includes an LED indicator light 4, which is connected to the voice recognition module and is used to display the operation and recognition status of the circuit. When the voice recognition module operates or recognition is completed, it outputs a corresponding electrical signal to control the lighting or flashing of the LED indicator light 4, intuitively feeding back the current operating status of the circuit and allowing the user to easily check whether the operation is valid.

[0030] As shown in FIGS. 2 and 3, in this embodiment, the power supply module includes a dry cell 5, a first DC / DC conversion circuit 6 having a model number AiP4004, a 3.3V constant voltage circuit 7, and a second DC / DC conversion circuit 8 having a model number SY8089.

[0031] The dry cell 5 outputs a 3V voltage, which is converted by the first DC / DC converter circuit 6, model AiP4004, and stabilized by the 3.3V constant voltage circuit 7 to output a 3.3V voltage. Because the 1.5V voltage provided by the dry cell 5 is low and cannot meet the needs of most modules, the first DC / DC converter circuit 6, model AiP4004, boosts the voltage, which is then further stabilized by the 3.3V constant voltage circuit 7 to supply power to elements requiring a 3.3V voltage, such as the control module and wireless transmission module. When the dry cell 5 is low in power, it can provide a stable voltage to the voice recognition module.

[0032] The second DC / DC converter circuit 8, model number SY8089, converts the voltage to 1.2V and supplies power to the voice recognition module. If the operating voltage of the core components of the voice recognition module is low, the second DC / DC converter circuit 8, model number SY8089, reduces the input voltage to 1.2V, providing an appropriate and stable voltage and ensuring stable voice recognition.

[0033] 4, in this embodiment, the circuit of the electret microphone 2 includes MIC_P and MIC_N pins, and transmits the audio signal collected by the electret microphone 2 to the voice recognition module through a filtering circuit and a voltage divider circuit made up of resistors and capacitors. The audio signal output by the electret microphone 2 is weak and may contain noise, so the voltage divider circuit made up of resistors can adjust the signal amplitude within the applicable range of the voice recognition module, and the capacitor can filter out high-frequency noise and interference signals, so that the signal transmitted to the voice recognition module is cleaner and the recognition accuracy can be improved.

[0034] As shown in Figures 5 and 6, in this embodiment, the voice recognition module uses an offline voice recognition chip 9 such as the Hummingbird series US513, the Jieli series JL701 / AC695, the Shanjing series AP8064, the Ruixin micro series RK2108, the Qiying telun series or the Coda Xin flight series, and the memory module uses a non-volatile flash memory chip 10 with model number GD25Q32ESIG.

[0035] Taking an offline speech recognition chip 9, model number Hummingbird series US513, as an example, it is connected to a non-volatile flash memory chip 10, model number GD25Q32ESIG, via an SPI bus. The SPI bus has pins SPI_SCLK, SPI_MOSI, SPI_MISO, and SPI_CS_N. The SPI bus is a high-speed synchronous serial communication bus. SPI_SCLK is the clock signal pin that controls the data transmission rhythm. SPI_MOSI is the master output and slave input pin that is used to send data from the speech recognition chip to the memory chip. SPI_MISO is the slave output and master input pin that is used to feed data back from the memory chip to the speech recognition chip. SPI_CS_N is the chip select pin that controls the start and stop of communication. This bus realizes fast and stable data interaction between the two and facilitates the speech recognition chip's ability to retrieve stored recognition data.

[0036] As shown in Figure 7, in this embodiment, the control module uses MCU11, model number UST2030. Multiple pins on MCU11 are connected to metal dome 1 to receive commands triggered by different buttons. The PB6 / PWM / CIN4 pin on MCU11 is connected to the TX terminal of the wireless transmitter module via a 1K resistor to transmit control signals. Metal dome 1 is connected to a pin on MCU11. When a button is pressed, the level of the corresponding pin changes. MCU11 recognizes the specific button command by detecting the level change. The 1K resistor serves to limit current, protecting the pins of MCU11 and the wireless transmitter module, preventing damage to components due to excessive current, and ensuring stable transmission of control signals to the wireless transmitter module.

[0037] As shown in Figure 8, in this embodiment, the wireless transmitter module uses a transmitter chip 3 with model number XL4456. The XOUT and XIN pins of the transmitter chip 3 are connected to a 13.56M quartz crystal and a 22P capacitor to form an oscillator circuit. The PAOUT pin of the transmitter chip 3 is connected to the ANT antenna via a network consisting of inductors L1, L2, L8, and capacitors C3, C4, C9, C10, C11, and C12 to transmit signals. The DIN pin of the transmitter chip 3 receives the command signal from the PB5 / PWM / INT0 pin of the control module. The oscillator circuit consisting of a 13.56M quartz crystal and a 22P capacitor provides a stable clock signal to the transmitter chip 3, ensuring the accuracy of the transmission frequency. The impedance of the circuit is adjusted according to the inductors and capacitors in the network, achieving impedance matching between the transmitter chip 3 and the antenna, reducing signal reflections and improving signal transmission efficiency. The DIN pin receives the control signal, which is then processed internally on the chip and transmitted via the PAOUT pin and the antenna.

[0038] As shown in Figure 9, in this embodiment, the LED indicator 4 of the display module is connected to the LED_GREEN_CTL pin of the voice recognition module via resistor R55 to indicate that the remote control is working properly and prompt the user that a button or voice command has been sent to the CD player. Resistor R55 is a current-limiting resistor to prevent the LED indicator 4 from being damaged by excessive current. When the voice recognition module outputs a control signal, current flows through resistor R55 to the LED indicator 4, turning it on. The green state clearly indicates that voice recognition is in progress or that the circuit is working properly.

[0039] 10, this embodiment further includes a software upgrade module, which employs a UART Update port 12, with the DB_TXD and DB_RXD pins of the UART Update port 12 connected to the corresponding serial port pins of the voice recognition module. UART is an asynchronous serial communication port, with DB_TXD being the transmit pin used by an external device to send upgrade data to the voice recognition module, and DB_RXD being the receive pin used by the voice recognition module to provide feedback information to the external device. This port can be used to update the software program of the voice recognition module and improve its functionality and performance.

[0040] The working principle of this application is as follows.

[0041] After the power supply module is started, the voltage output from the dry cell 5 is converted by a first DC / DC converter circuit 6, model number AiP4004, and then stabilized by a 3.3V constant voltage circuit 7 to output a 3.3V voltage, which supplies operating voltage to the MCU 11, wireless transmitter module, and electret microphone 2. At the same time, a second DC / DC converter circuit 8, model number SY8089, converts the voltage to 1.2V, which supplies power to the US513 voice recognition chip, ensuring the voltage of each module.

[0042] At the input stage, when the metal domes 1K1-K5 are triggered, the level of the corresponding pins is changed and the signal is transmitted to the pins such as PB0-PB7 of the MCU11. The MCU11 recognizes the button command, and the electret microphone 2 collects the audio signal through the MIC_P and MIC_N pins, divides the voltage by resistors such as R17 and R18, filters it through capacitors such as C183, and sends the processed signal to the voice recognition chip.

[0043] After the voice recognition module receives the voice signal, the US513 chip accesses the data in the memory module to perform offline recognition and sends the recognition result to MCU 11. At the same time, it controls LED indicator light 4 via the LED_GREEN_CTL pin to feedback the recognition status by turning it on, off, or blinking. MCU 11 combines the button command and the voice recognition result to generate a control signal.

[0044] The control signal is transmitted to the TX terminal of the wireless transmitter module via the PB6 / PWM / CIN4 pin of the MCU 11 and a 1K resistor. The signal is modulated by the 433MRF transmitter circuit and then transmitted via the antenna to the CD player for remote control. The UART Update port 12 can also be used to upgrade software and system functions via the UART1_TX and UART1_RX pins.

[0045] As mentioned above, the present invention has been described relatively specifically and in detail through the general description and specific examples. However, it is understood that those skilled in the art can make various adjustments or further innovations to the specific embodiments of the present application based on the technical concept of the present invention, and the technical solutions obtained by these ordinary adjustments or further innovations also fall within the scope of the utility model claims of the present application, as long as they do not deviate from the technical concept of the present utility model. [Explanation of symbols]

[0046] 1: Metal dome 2: Electret microphone 3:Transmitting chip 4:LED indicator light 5: Dry cell batteries 6: First DC / DC conversion circuit 7:3.3V constant voltage circuit 8: Second DC / DC conversion circuit 9: Offline voice recognition chip 10: Non-volatile flash memory chip 11:MCU 12: UART Update port

Claims

1. 1. A remote control circuit for a voice-controlled CD player, comprising: a power supply module, the power supply module being used to supply an operating voltage to the remote control circuit; an input module, including a metal dome (1) and an electret microphone (2), wherein the metal dome (1) is used to receive manual button commands and the electret microphone (2) is used to collect voice commands; a voice recognition module, said voice recognition module being connected to said electret microphone (2), said voice recognition module being used to recognize collected voice commands offline; a control module, the control module being electrically connected to the metal dome (1) and the voice recognition module respectively, the control module being used to receive and process commands after button and voice recognition; a memory module, the memory module coupled to the voice recognition module, the memory module being used to store voice recognition data and configuration information; The wireless transmitter module includes a transmitter chip (3), the wireless transmitter module is electrically connected to the control module, the wireless transmitter module is used to externally transmit signals to the CD player, and a wireless receiver module is disposed in the CD player; The remote control circuit of the voice-controlled CD player includes a display module and an LED indicator light (4), the display module is connected to the voice recognition module, and the display module is used to display the operation and recognition status of the circuit.

2. The voice recognition module uses the Hummingbird series US513, the JieLi series JL701 / AC695, the ShanJing series AP8064, the Ruixin series RK2108, the Qiying Telun series or the CodaXinFly series offline voice recognition chip (9), and the memory module uses the model number GD25Q32ESIG non-volatile flash memory chip (10).

2. The remote control circuit for a voice-controlled CD player according to claim 1, wherein the offline voice recognition chip (9) is connected to a non-volatile flash memory chip (10) with model number GD25Q32ESIG via an SPI bus, and SPI_SCLK, SPI_MOSI, SPI_MISO, and SPI_CS_N pins are arranged on the SPI bus.

3. 2. The remote control circuit for a voice-controlled CD player according to claim 1, wherein the circuit of the electret microphone (2) includes MIC_P and MIC_N pins, and transmits the collected voice signal to the voice recognition module through a filtering circuit and a voltage divider circuit, which are made up of resistors and capacitors.

4. The power supply module includes a dry battery (5), a first DC / DC conversion circuit (6) with a model number AiP4004, a 3.3V constant voltage circuit (7), and a second DC / DC conversion circuit (8) with a model number SY8089. The dry cell (5) outputs a 3V voltage, which is converted by a first DC / DC conversion circuit (6) whose model number is AiP4004, and stabilized by the 3.3V constant voltage circuit (7) to output a 3.3V voltage.

2. The remote control circuit for a voice-controlled CD player as claimed in claim 1, further comprising a second DC / DC converter circuit (8) with model number SY8089 to convert the voltage to 1.2V and supply power to the voice recognition module.

5. 2. The remote control circuit for a voice-controlled CD player as claimed in claim 1, wherein the control module adopts an MCU (11) whose model number is UST2030, and multiple pins of the MCU (11) are connected to the metal dome (1) to receive commands triggered by different buttons, and the PB6 / PWM / CIN4 pin of the MCU (11) is connected to the TX terminal of the wireless transmitting module through a 1K resistor to transmit control signals.

6. 2. The remote control circuit for a voice-controlled CD player as claimed in claim 1, wherein the wireless transmitting module uses a transmitting chip (3) with model number XL4456, the XOUT and XIN pins of the transmitting chip (3) are connected to a 13.56M quartz crystal resonator and a 22P capacitor to form an oscillator circuit, the PAOUT pin of the transmitting chip (3) is connected to an ANT antenna via a network consisting of inductors L1, L2, L8 and capacitors C3, C4, C9, C10, C11 and C12 to transmit signals, and the DIN pin of the transmitting chip (3) receives a command signal transmitted from the PB5 / PWM / INT0 pin of the control module.

7. 2. The voice-controlled CD player remote control circuit of claim 1, wherein the LED indicator light (4) of the display module is connected to the LED_GREEN_CTL pin of the voice recognition module through a resistor R55 to indicate that the remote control is working properly and prompt the user that a button or voice command has been sent to the CD player.

8. 2. The remote control circuit for a voice-controlled CD player according to claim 1, further comprising a software upgrade module, wherein the software upgrade module employs a UART Update port (12), and DB_TXD and DB_RXD pins of the UART Update port (12) are connected to serial port pins corresponding to the voice recognition module.

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