A voice-controlled remote control circuit for a CD player

Abstract

This utility model discloses a voice-controlled remote control circuit for a CD player, including a power module, an input module, a voice recognition module, a control module, a storage module, a wireless transmission module, an indicator module, and a software upgrade module. The power module provides a stable voltage; the input module includes a button dome and an electret microphone, receiving manual and voice commands respectively; the voice recognition module recognizes voice commands offline; the control module processes commands and transmits them to the wireless transmission module; the wireless transmission module transmits control signals to the CD player, which is equipped with a receiving module; the indicator module displays the operating status; the storage module stores relevant data; and the software upgrade module supports system upgrades. This circuit achieves dual control via voice and buttons, improving ease of operation, eliminating the need for a network, offering high stability, and facilitating upgrades.

Description

Technical Field

[0001] This utility model relates to a remote control circuit, and more particularly to a voice-controlled CD player remote control circuit. Background Technology

[0002] In the consumer electronics field, CD players, as classic audio playback devices, have long relied on traditional button-type remote controls, which use infrared emitting diodes to transmit signals for control. While these remote controls allow users to input commands via physical buttons and meet basic operational needs, they have significant limitations in practical use: when users are busy with their hands, such as driving or organizing items, or when operating from a distance, manually finding and pressing the buttons is extremely inconvenient and greatly affects the user experience.

[0003] With the development of voice interaction technology, the market demand for voice control of CD players is becoming increasingly prominent. However, existing remote controls for CD players are still stuck in the stage of pure button control, lacking mature solutions that integrate voice recognition functionality. From a circuit design perspective, to achieve voice control, a complete circuit system including voice acquisition, recognition, and command transmission needs to be built: a stable power supply module with multiple voltage outputs is required to power components with different power consumption, such as the voice recognition chip, MCU, and wireless transmission module; a high-sensitivity, low-noise voice acquisition circuit needs to be designed to accurately capture user voice commands; an offline voice recognition chip needs to be introduced to avoid response delays and limited usage scenarios caused by network dependence; a storage module is also needed for storing voice models and command data, a wireless transmission module ensures stable transmission of control signals to the CD player, and a software upgrade module is needed to meet functional iteration requirements.

[0004] Existing technologies fail to provide users with a convenient and stable voice control experience due to the lack of systematic circuit design for the voice control requirements of CD player remote controls, and are also difficult to adapt to the functional expansion and technological upgrade trends of CD player devices. Utility Model Content

[0005] To address this issue, this invention provides a voice-controlled remote control circuit for CD players, solving the problem that existing CD player remote controls rely solely on button control, making them inconvenient to use when hands are busy or in long-distance scenarios.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a voice-controlled CD player remote control circuit, comprising:

[0007] Power module, the power module being used to provide operating voltage for the remote control circuit;

[0008] The input module includes a button dome and an electret microphone. The button dome is used to receive manual button commands, and the electret microphone is used to collect voice commands.

[0009] A voice recognition module, which is connected to the electret microphone, is used to perform offline recognition of collected voice commands;

[0010] The control module is electrically connected to the button dome and the voice recognition module respectively. The control module is used to receive and process the commands after button press and voice recognition.

[0011] A storage module, connected to the speech recognition module, is used to store speech recognition data and configuration information;

[0012] A wireless transmitting module, including a transmitting chip, is electrically connected to the control module. The wireless transmitting module is used to transmit signals to a CD playback device, which is equipped with a wireless receiving module.

[0013] The indicator module includes an LED indicator light, which is connected to the voice recognition module. The indicator module is used to display the circuit's operation and recognition status.

[0014] As a preferred embodiment of the remote control circuit for a voice-controlled CD player, the power module includes a dry cell battery, a first DC / DC conversion circuit of model AiP4004, a 3.3V voltage regulator circuit, and a second DC / DC conversion circuit of model SY8089.

[0015] The dry cell battery outputs a 3V voltage, which is converted by the first DC / DC conversion circuit (model AiP4004) and regulated by the 3.3V voltage regulator circuit to output a 3.3V voltage.

[0016] The second DC / DC conversion circuit, model SY8089, converts the voltage to 1.2V to power the voice recognition module.

[0017] As a preferred solution for the remote control circuit of a voice-controlled CD player, the electret microphone circuit includes MIC_P and MIC_N pins, and transmits the collected voice signal to the voice recognition module through a filtering and voltage divider circuit composed of resistors and capacitors.

[0018] As a preferred solution for the remote control circuit of a voice-controlled CD player, the voice recognition module adopts offline voice recognition chips such as Hummingbird US513, JL701 / AC695, AP8064, RK2108, Qiying Tailun, or iFlytek, and the storage module adopts a non-volatile flash memory chip with model number GD25Q32ESIG.

[0019] The offline voice recognition chip is connected to a non-volatile flash memory chip of model GD25Q32ESIG via an SPI bus, which is configured with SPI_SCLK, SPI_MOSI, SPI_MISO, and SPI_CS_N pins.

[0020] As a preferred solution for the remote control circuit of a voice-controlled CD player, the control module uses an MCU of model UST2030. Several pins of the MCU are connected to the button dome to receive commands triggered by different buttons. The PB6 / PWM / CIN4 pins of the MCU are connected to the TX terminal of the wireless transmission module through a 1K resistor to transmit control signals.

[0021] As a preferred solution for the remote control circuit of a voice-controlled CD player, the wireless transmission module uses a transmitter chip of model XL4456. The XOUT and XIN pins of the transmitter chip are connected to an external 13.56M crystal oscillator and a 22P capacitor to form an oscillation circuit. The PAOUT pin of the transmitter chip is connected to the ANT antenna to transmit signals through a matching network composed of inductors L1, L2, L8 and capacitors C3, C4, C9, C10, C11 and C12. The DIN pin of the transmitter chip receives the command signals transmitted by the PB5 / PWM / INT0 pins of the control module.

[0022] As a preferred solution for the remote control circuit of a voice-controlled CD player, the LED indicator of the indicator 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 normally and to prompt the user that the button or voice command has been sent to the CD player device.

[0023] As a preferred solution for the remote control circuit of a voice-controlled CD player, it also includes a software upgrade module. The software upgrade module 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.

[0024] This utility model has the following advantages:

[0025] First, it achieves dual control modes of voice and buttons. Users can input voice commands through the electret microphone solution or perform manual operation using the button dome switch, flexibly adapting to different usage scenarios and improving ease of operation.

[0026] Secondly, it adopts an offline speech recognition chip, which can complete speech recognition without relying on the network, responds quickly and is not limited by the network environment, ensuring the stability of command processing.

[0027] Third, the power supply module includes multiple stable voltages to meet the power supply needs of different modules and ensure the overall stable operation of the circuit. The wireless transmission module can stably transmit control signals, effectively filter and divide voltage, reduce noise interference, improve the accuracy of voice recognition and signal transmission, and enhance the reliability of communication between the remote control and the CD player. Attached Figure Description

[0028] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0029] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0030] Figure 1 A schematic diagram of the remote control circuit architecture for a voice-controlled CD player provided in this embodiment of the utility model;

[0031] Figure 2 A first DC / DC conversion circuit diagram of model AiP4004 provided for embodiments of this utility model;

[0032] Figure 3 A second DC / DC converter circuit diagram of model SY8089 provided for embodiments of this utility model;

[0033] Figure 4 The electret microphone circuit diagram provided for the embodiments of this utility model;

[0034] Figure 5 The offline speech recognition chip circuit diagram provided for the embodiments of this utility model;

[0035] Figure 6 Circuit diagram of a non-volatile flash memory chip, model GD25Q32ESIG, provided for embodiments of this utility model;

[0036] Figure 7 The MCU circuit diagram of model UST2030 provided for the embodiments of this utility model;

[0037] Figure 8 Circuit diagram of the transmitter chip, model XL4456, provided for embodiments of this utility model;

[0038] Figure 9 LED indicator circuit diagram provided for embodiments of this utility model;

[0039] Figure 10 A circuit diagram of the UART Update port provided for an embodiment of this utility model.

[0040] In the diagram: 1. Button dome switch; 2. Electret microphone; 3. Transmitter chip; 4. LED indicator; 5. Dry cell battery; 6. First DC / DC converter circuit; 7. 3.3V voltage regulator circuit; 8. Second DC / DC converter circuit; 9. Offline voice recognition chip; 10. Non-volatile flash memory chip; 11. MCU; 12. UART Update port. Detailed Implementation

[0041] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] See Figure 1 This utility model embodiment provides a voice-controlled CD player remote control circuit, including:

[0043] The power module provides operating voltage to the remote control circuit. The power module converts the voltage of the dry cell battery 5 into stable voltages of different specifications through a conversion circuit to meet the different voltage requirements of each module in the circuit and ensure that each component operates stably under the rated voltage.

[0044] The input module includes a button dome 1 and an electret microphone 2. The button dome 1 is used to receive manual button commands, and the electret microphone 2 is used to acquire voice commands. The button dome 1 converts mechanical actions into electrical signals by pressing and triggering the circuit to open and close. The electret microphone 2 converts sound wave signals into weak electrical signals through the principle of sound-to-electricity conversion, thereby realizing the acquisition of voice commands.

[0045] The speech recognition module is connected to the electret microphone 2 and is used to perform offline recognition of the collected speech commands. After receiving the speech electrical signal transmitted by the electret microphone 2, the speech recognition module processes the signal, extracts features and matches them through an integrated existing speech recognition algorithm, and completes the recognition of speech commands locally without relying on an external network.

[0046] The control module is electrically connected to the keypad dome 1 and the voice recognition module. The control module is used to receive and process the commands after keying and voice recognition. The control module receives the electrical signal of the keypad dome 1 and the recognition result of the voice recognition module, performs logical judgment and command conversion, and generates corresponding control signals to send to the wireless transmission module.

[0047] A storage module is connected to the speech recognition module. The storage module is used to store speech recognition data and configuration information. It can save data such as models, instruction libraries, and user configurations required for speech recognition, ensuring that the speech recognition module can quickly call up data for recognition processing and that the data is not lost after power failure.

[0048] The wireless transmitting module includes a transmitting chip 3. The wireless transmitting module is electrically connected to the control module. The wireless transmitting module is used to transmit signals to the CD playback device. The CD playback device is equipped with a wireless receiving module. After receiving the control signal transmitted by the control module, the transmitting chip 3 modulates and amplifies the signal, and then transmits it wirelessly through the antenna to realize remote control of the CD playback device.

[0049] The indicator module includes an LED indicator 4, which is connected to the voice recognition module. The indicator module is used to display the circuit's working and recognition status. When the voice recognition module is working or has completed recognition, it will output a corresponding electrical signal to control the LED indicator 4 to light up or flash, providing intuitive feedback on the current working status of the circuit and making it convenient for users to understand whether the operation has taken effect.

[0050] See Figure 2 and Figure 3 In this embodiment, the power module includes a dry cell battery 5, a first DC / DC conversion circuit 6 of model AiP4004, a 3.3V voltage regulator circuit 7, and a second DC / DC conversion circuit 8 of model SY8089;

[0051] The dry cell battery 5 outputs a 3V voltage, which is converted by the first DC / DC converter circuit 6 (model AiP4004) and regulated by the 3.3V voltage regulator circuit 7 to output a 3.3V voltage. The 1.5V voltage provided by the dry cell battery 5 is too low to meet the needs of most modules. The first DC / DC converter circuit 6 (model AiP4004) boosts and converts this voltage, and the 3.3V voltage regulator circuit 7 further stabilizes the voltage to power components requiring 3.3V, such as the control module and the wireless transmission module. Even when low on power, the dry cell battery 5 can provide a stable voltage for the voice recognition module.

[0052] The second DC / DC converter circuit 8, model SY8089, converts the voltage to 1.2V to power the voice recognition module. Since the core components of the voice recognition module operate at low voltages, the second DC / DC converter circuit 8, model SY8089, reduces the input voltage to 1.2V, providing a suitable and stable voltage to ensure the stable operation of the voice recognition process.

[0053] See Figure 4 In this embodiment, the electret microphone 2 includes MIC_P and MIC_N pins. A filtering and voltage divider circuit composed of resistors and capacitors transmits the voice signal collected by the microphone of the electret microphone 2 to the voice recognition module. The voice signal output by the electret microphone 2 is weak and may contain noise. The voltage divider circuit composed of resistors adjusts the signal amplitude to the range suitable for the voice recognition module, while the capacitors filter out high-frequency noise and interference signals, making the signal transmitted to the voice recognition module purer and improving recognition accuracy.

[0054] See Figure 5 and Figure 6 In this embodiment, the voice recognition module uses offline voice recognition chips 9 such as Hummingbird US513, JL701 / AC695, AP8064, RK2108, Qiying Tailun, or iFlytek, and the storage module uses a non-volatile flash memory chip 10 with model number GD25Q32ESIG.

[0055] Taking the Hummingbird US513 offline voice recognition chip 9 as an example, it is connected to the GD25Q32ESIG non-volatile flash memory chip 10 via an SPI bus. The SPI bus is configured with SPI_SCLK, SPI_MOSI, SPI_MISO, and SPI_CS_N pins. The SPI bus is a high-speed synchronous serial communication bus. SPI_SCLK is the clock signal pin, controlling the data transmission rhythm; SPI_MOSI is the master output / slave input pin, used by the voice recognition chip to send data to the storage chip; SPI_MISO is the slave output / master input pin, used by the storage chip to feed back data to the voice recognition chip; and SPI_CS_N is the chip select pin, controlling the start and stop of communication. This bus enables fast and stable data interaction between the two, facilitating the voice recognition chip's access to stored recognition data.

[0056] See Figure 7 In this embodiment, the control module uses an MCU11 of model UST2030. Several pins of the MCU11 are connected to the button dome 1 to receive commands triggered by different buttons. The PB6 / PWM / CIN4 pins of the MCU11 are connected to the TX terminal of the wireless transmitter module through a 1K resistor to transmit control signals. The button dome 1 is connected to the pins of the MCU11. When a button is pressed, the corresponding pin level changes. The MCU11 identifies the specific button command by detecting the level change. The 1K resistor acts as a current limiter, protecting the pins of the MCU11 and the wireless transmitter module, preventing excessive current from damaging components, and ensuring stable transmission of control signals to the wireless transmitter module.

[0057] See Figure 8 In this embodiment, the wireless transmission module uses a transmitter chip 3 of model XL4456. The XOUT and XIN pins of the transmitter chip 3 are externally connected to a 13.56MHz crystal oscillator and a 22pF capacitor to form an oscillation circuit. The PAOUT pin of the transmitter chip 3 is connected to the ANT antenna to transmit signals through a matching network composed of inductors L1, L2, L8, and capacitors C3, C4, C9, C10, C11, and C12. The DIN pin of the transmitter chip 3 receives command signals transmitted from the PB5 / PWM / INT0 pins of the control module. The oscillation circuit composed of the 13.56MHz crystal oscillator and the 22pF capacitor provides a stable clock signal for the transmitter chip 3, ensuring the accuracy of the transmission frequency. The inductors and capacitors in the matching network can adjust the circuit impedance, enabling impedance matching between the transmitter chip 3 and the antenna, reducing signal reflection, and improving signal transmission efficiency. The DIN pin receives control signals, which are processed internally by the chip and then transmitted through the PAOUT pin and the antenna.

[0058] See Figure 9In this embodiment, the LED indicator 4 of the indicator 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 normally and to prompt the user that the button or voice command has been sent to the CD player device. Resistor R55 is a current-limiting resistor to prevent the LED indicator 4 from being damaged due to excessive current; when the voice recognition module outputs a control signal, current flows through resistor R55 to the LED indicator 4, illuminating it. The green state clearly indicates that voice recognition is in progress or that the circuit is in normal working condition.

[0059] See Figure 10 In this embodiment, a software upgrade module is also included. This module uses a UARTUpdate port 12, whose DB_TXD and DB_RXD pins are connected to the corresponding serial port pins of the speech recognition module. UART is an asynchronous serial communication interface. DB_TXD is the transmit pin, used by external devices to transmit upgrade data to the speech recognition module; DB_RXD is the receive pin, used by the speech recognition module to send feedback information to external devices. This port allows for software updates and upgrades to the speech recognition module, improving its functionality and performance.

[0060] The working principle of this utility model is as follows:

[0061] After the power module is started, the voltage output by the dry cell battery 5 is processed by the first DC / DC conversion circuit 6 (model AiP4004), and then outputs a 3.3V voltage through the 3.3V voltage regulator circuit 7 to provide the operating voltage for the MCU11, wireless transmitter module, electret microphone 2, etc. At the same time, the second DC / DC conversion circuit 8 (model SY8089) converts the voltage to 1.2V to power the US513 voice recognition chip, ensuring voltage compatibility of each module.

[0062] During the input phase, when the key dome switches 1K1-K5 are triggered, the corresponding pin level changes, and the signal is transmitted to the PB0-PB7 pins of MCU11. MCU11 recognizes the specific key command. The electret microphone 2 collects the voice signal through the MIC_P and MIC_N pins. After being divided by resistors R17 and R18 and filtered by capacitors C183, the processed signal is sent to the voice recognition chip.

[0063] After receiving the voice signal, the US513 chip calls the data in the storage module for offline recognition. The recognition result is transmitted to the MCU11. At the same time, the LED indicator 4 is controlled through the LED_GREEN_CTL pin to provide feedback on the recognition status by turning it on or off or flashing. The MCU11 integrates the button commands and the voice recognition results to generate control signals.

[0064] The control signal is transmitted to the TX terminal of the wireless transmitter module via the PB6 / PWM / CIN4 pin of MCU11 and a 1K resistor. After the 433MRF transmitter circuit modulates the signal, it is transmitted to the CD playback device by the antenna to realize remote control. In addition, the UARTUpdate port 12 can be upgraded via the UART1_TX and UART1_RX pins to update the system functions.

[0065] The present invention has been described in a relatively specific and detailed manner above through general description and specific embodiments. It should be understood that, based on the technical concept of the present invention, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present invention, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present invention.

Claims

1. A voice-controlled remote control circuit for a CD player, characterized in that, include: Power module, the power module being used to provide operating voltage for the remote control circuit; The input module includes a button dome (1) and an electret microphone (2). The button dome (1) is used to receive manual button commands, and the electret microphone (2) is used to collect voice commands. A voice recognition module is connected to the electret microphone (2) and is used to perform offline recognition of collected voice commands. The control module is electrically connected to the button dome (1) and the voice recognition module respectively. The control module is used to receive and process the instructions after button press and voice recognition. A storage module, connected to the speech recognition module, is used to store speech recognition data and configuration information; The wireless transmitting module includes a transmitting chip (3), the wireless transmitting module is electrically connected to the control module, the wireless transmitting module is used to transmit signals to the CD playback device, and the CD playback device is equipped with a wireless receiving module; The indicator module includes an LED indicator (4), which is connected to the voice recognition module and is used to display the circuit operation and recognition status.

2. The voice-controlled CD player remote control circuit according to claim 1, characterized in that, The speech recognition module uses offline speech recognition chips (9) such as Hummingbird US513, JL701 / AC695, AP8064, RK2108, Qiying Tailun or iFlytek, and the storage module uses a non-volatile flash memory chip (10) with model number GD25Q32ESIG. The offline speech recognition chip (9) is connected to a non-volatile flash memory chip (10) of model GD25Q32ESIG via an SPI bus. The SPI bus is configured with SPI_SCLK, SPI_MOSI, SPI_MISO and SPI_CS_N pins.

3. The voice-controlled CD player remote control circuit according to claim 1, characterized in that, The electret microphone (2) circuit includes MIC_P and MIC_N pins. The collected voice signal is transmitted to the voice recognition module through a filter and voltage divider circuit composed of resistors and capacitors.

4. The voice-controlled CD player remote control circuit according to claim 1, characterized in that, The power module includes a dry cell battery (5), a first DC / DC conversion circuit (6) of model AiP4004, a 3.3V voltage regulator circuit (7), and a second DC / DC conversion circuit (8) of model SY8089; The dry cell battery (5) outputs a 3V voltage, which is converted by the first DC / DC conversion circuit (6) of model AiP4004 and regulated by the 3.3V voltage regulator circuit (7) to output a 3.3V voltage. The second DC / DC conversion circuit (8), model SY8089, converts the voltage to 1.2V to power the voice recognition module.

5. The voice-controlled CD player remote control circuit according to claim 1, characterized in that, The control module uses an MCU (11) of model UST2030. Several pins of the MCU (11) are connected to the button dome (1) to receive instructions triggered by different buttons. The PB6 / PWM / CIN4 pins of the MCU (11) are connected to the TX terminal of the wireless transmission module through a 1K resistor to transmit control signals.

6. The voice-controlled CD playback device remote control circuit according to claim 1, characterized in that, The wireless transmission module uses a transmitter chip (3) of model XL4456. The XOUT and XIN pins of the transmitter chip (3) are connected to an external 13.56M crystal oscillator and a 22P capacitor to form an oscillation circuit. The PAOUT pin of the transmitter chip (3) is connected to the ANT antenna to transmit signals through a matching network composed of inductors L1, L2, L8 and capacitors C3, C4, C9, C10, C11 and C12. The DIN pin of the transmitter chip (3) receives the command signals transmitted by the PB5 / PWM / INT0 pins of the control module.

7. The voice-controlled CD playback device remote control circuit according to claim 1, characterized in that, The LED indicator (4) of the indicator 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 normally and to prompt the user that the button or voice command has been sent to the CD player device.

8. The voice-controlled CD player remote control circuit according to claim 1, characterized in that, It also includes a software upgrade module, which uses a UART Update port (12), and the DB_TXD and DB_RXD pins of the UART Update port (12) are connected to the corresponding serial port pins of the voice recognition module.

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