WO2019228357A1 - 一种集成语音唤醒功能的电路、电视和语音控制方法 - Google Patents

一种集成语音唤醒功能的电路、电视和语音控制方法 Download PDF

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WO2019228357A1
WO2019228357A1 PCT/CN2019/088845 CN2019088845W WO2019228357A1 WO 2019228357 A1 WO2019228357 A1 WO 2019228357A1 CN 2019088845 W CN2019088845 W CN 2019088845W WO 2019228357 A1 WO2019228357 A1 WO 2019228357A1
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voice
wake
signal
unit
analog
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PCT/CN2019/088845
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English (en)
French (fr)
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汪琴
叶春梦
林敏强
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康佳集团股份有限公司
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Priority to US17/057,253 priority Critical patent/US11356727B2/en
Publication of WO2019228357A1 publication Critical patent/WO2019228357A1/zh

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/28—Constructional details of speech recognition systems
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/26—Speech to text systems
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L17/00—Speaker identification or verification techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42203—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] sound input device, e.g. microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4436—Power management, e.g. shutting down unused components of the receiver
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
    • G10L2015/223—Execution procedure of a spoken command

Definitions

  • the present invention relates to the technical field of smart televisions, and in particular, to a circuit, a television, and a voice control method that integrate a voice wake-up function.
  • the existing far-field voice technology has not been able to achieve a real standby wake-up function, that is, to wake up the TV when the power consumption of the whole machine is lower than 0.5W.
  • the existing standby wake-up technology is false standby, that is, the TV motherboard is still working normally, but the backlight display is turned off, so that the TV screen cannot see anything displayed, thus misleading consumers to think that it is the true standby module.
  • this false standby wake-up function has a TV motherboard that is always under a workload state, which causes a large increase in power consumption, which does not meet the requirements of energy saving and environmental protection.
  • an object of the present invention is to provide a circuit, a television, and a voice control method that integrate a voice wake-up function, which can effectively reduce the integration of the television on the basis of implementing the local voice standby wake-up function of the television. Machine power consumption, thus meeting the requirements of energy saving and environmental protection.
  • a circuit with integrated voice wake-up function includes a TV motherboard and a far-field voice module.
  • the far-field voice module includes:
  • Microphone unit for collecting analog signals of human voice
  • An analog-to-digital conversion unit for converting an analog signal of a human voice into a digital signal
  • the main control unit for processing the converted digital signal and outputting it to the TV motherboard;
  • the microphone unit is connected to the analog-to-digital conversion unit and the voice recognition unit, the analog-to-digital conversion unit is connected to the main control unit and the TV main board, and the TV main board is connected to the main control unit and the voice wake-up unit respectively.
  • the voice wake-up unit includes a voice recognition chip, a first linear regulator, and a PMOS tube switch circuit, and an IO interface of the voice recognition chip is connected to an IO interface of a television motherboard.
  • the vcc terminal of the speech recognition chip is connected to the output terminal of the first linear regulator, the input terminal of the first linear regulator is connected to the output terminal of the PMOS tube switch circuit, and the input terminal of the PMOS tube switch circuit is connected to the 5V-STB terminal of the TV motherboard.
  • a preset voice wake-up command is stored in the voice recognition chip.
  • the model of the voice recognition chip is ISD9160.
  • the far-field voice module further includes an encryption unit, the digital signal is an I2S signal, and the encryption unit is used for communication between the main control unit and the analog-to-digital conversion unit. The process is encrypted through the I2C protocol.
  • a television includes a circuit with integrated voice wake-up function as described in any of the above.
  • a voice control method based on the television includes the following steps:
  • the microphone unit collects analog signals of human voices within a preset range and sends them to the analog-to-digital conversion unit;
  • the analog-to-digital conversion unit converts the analog signal of the human voice into a digital signal and outputs it to the TV motherboard;
  • the TV motherboard After the TV motherboard processes the converted digital signal, it performs the corresponding feedback operation;
  • the microphone unit collects analog signals of human voices within a preset range and sends them to the voice wake-up unit;
  • the voice wake-up unit processes the analog signal of the human voice and outputs a wake-up signal to the TV motherboard;
  • the TV motherboard After the TV motherboard receives the wake-up signal, the TV is switched from the standby working state to the normal working state.
  • the steps of the voice wake-up unit processing an analog signal of a human voice and outputting the wake-up signal to a television motherboard specifically include:
  • the voice wake-up unit processes the analog signal of the collected human voice, and compares the processed signal with a preset voice wake-up command
  • the steps of the analog-to-digital conversion unit converting an analog signal of a human voice into a digital signal and outputting the analog signal to a television motherboard include:
  • the analog-to-digital conversion unit converts the analog signal of the human voice into a digital signal
  • the encryption unit performs encryption processing on the converted digital signal
  • the analog-to-digital conversion unit sends the encrypted digital signal to the main control unit.
  • the present invention provides a circuit, a television and a voice control method with integrated voice wake-up function, wherein the circuit with integrated voice wake-up function includes a TV motherboard and a far-field voice module, and the far-field voice
  • the module includes: a microphone unit for collecting analog signals of the human voice; an analog-to-digital conversion unit for converting the analog signals of the human voice into digital signals; and a main unit for processing the converted digital signals and outputting them to the main board of the TV motherboard Control unit; used to process the human voice analog signal and output the wake-up signal to the voice wake-up unit of the TV motherboard; the microphone unit is connected to the analog-to-digital conversion unit and the voice recognition unit, respectively, and the analog-to-digital conversion unit is connected to the main control unit and the TV motherboard and the TV
  • the motherboard is connected to the main control unit and the voice wake-up unit respectively.
  • the invention can effectively reduce the overall power consumption of the TV on the basis of realizing the local voice standby wake-up function of the TV, thereby meeting
  • FIG. 1 is a structural block diagram of a circuit with integrated voice wake-up function provided by the present invention
  • FIG. 2 is a flowchart of a voice control method for a television with integrated voice wake-up function provided by the present invention
  • FIG. 3 is a flowchart of step S20 in a voice control method for a television with a voice wake-up function provided by the present invention
  • FIG. 4 is a flowchart of step S50 in a voice control method of a television with a voice wake-up function provided by the present invention.
  • an object of the present invention is to provide a circuit, a television, and a voice control method that integrate a voice wake-up function.
  • FIG. 1 is a structural block diagram of a circuit with integrated voice wake-up function provided by the present invention, which includes a television motherboard 10 and a far-field voice module 20, which includes:
  • An analog-to-digital conversion unit 40 for converting an analog signal of a human voice into a digital signal
  • the microphone unit 30 is connected to the analog-to-digital conversion unit 40 and the voice recognition unit, respectively.
  • the analog-to-digital conversion unit 40 is connected to the main control unit 50 and the TV motherboard 10, and the TV motherboard 10 is connected to the main control unit 50 and the voice wake-up unit 60, respectively.
  • the far-field voice module 20 as a whole can be connected to the TV motherboard 10 by using a peripheral board and an interface connection, which is convenient to add a circuit of the present invention that integrates the voice wake-up function to the existing TV circuit architecture.
  • the microphone unit 30 includes four analog MICs, which are respectively MIC1 to MIC4.
  • the microphone unit 30 can collect the analog signal of the corresponding human voice and send it to the analog-to-digital conversion unit 40 and the voice wake-up unit 60, respectively.
  • the analog-to-digital conversion unit 40 includes an analog-to-digital converter 41 and a second linear regulator 42. After the TV motherboard 10 is stepped down to 1.8V through the second linear regulator 42 through the 5V_USB interface, it provides a part of the analog-to-digital converter 41 Power supply.
  • the main control unit 50 includes an MCU chip 51, and the MCU chip 51 and the TV motherboard 10 use a USB protocol for information transmission.
  • the USB signal is a differential signal. A pair of wires is used to transmit a signal. D + and D- should be such a pair of differential signals. They are responsible for transmitting Data signals, that is, data.
  • the so-called differential signal means that when a high level is to be transmitted, one line (such as D +) sends a high level, and the other paired line is to transmit a low level. When a low level is to be transmitted, D + Send low, D- send high, so the phase of the signals sent on the two lines is reversed, this can improve the ability of anti-interference, which can increase the data transmission rate.
  • the type of the MCU chip in this embodiment is preferably STM32F401CDU6.
  • the main control unit 50 further includes a crystal oscillator chip 52 and a third linear regulator 53.
  • the TV motherboard 10 can also supply power to the MCU chip 51 after being stepped down to 3.3V through the 5V_USB interface and the third linear regulator 53, and can also provide another part of the power to the analog-to-digital converter 41.
  • the crystal oscillator chip 52 can provide the MCU chip 51 with its required clock frequency. In this embodiment, the frequency of the crystal oscillator chip 52 is selected to be 16 MHz.
  • the far-field voice module 20 further includes an encryption unit 70, and the digital signal is an I2S signal.
  • the encryption unit 70 is configured to communicate the communication process between the main control unit 50 and the analog-to-digital conversion unit 40 through the I2C protocol. Encrypted to protect user privacy.
  • the encryption unit 70 can realize its function by using an encryption chip. Specifically, an encryption chip that supports the I2C communication interface, such as SMEC98SC, ESAM885A5, can be selected. Of course, the selected encryption chip can implement the function of the encryption unit 70, and the present invention does not limit the specific model of the encryption chip.
  • the voice wake-up unit 60 includes a voice recognition chip 61, a first linear regulator 62, and a PMOS tube switching circuit 63.
  • the IO interface of the voice recognition chip 61 is connected to the IO interface of the TV motherboard 10.
  • the vcc terminal of the identification chip 61 is connected to the output terminal of the first linear regulator 62, the input terminal of the first linear regulator 62 is connected to the output terminal of the PMOS tube switching circuit 63, and the input terminal of the PMOS tube switching circuit 63 is connected to the TV motherboard 10. 5V-STB end.
  • the Power_en interface is the control IO port of the TV motherboard 10 to the speech recognition chip 61.
  • the Power_en interface outputs a high level when the TV is turned on, and the Power_en interface outputs a low level when the TV is in standby.
  • the Power_on interface is the feedback IO port of the voice recognition chip 61 to the TV motherboard 10. Power_on outputs a high level when the TV is turned on, and Power_on outputs a low level when the TV is in standby.
  • the model of the speech recognition chip 61 is ISD9160, of course, it can also be a different type of speech recognition chip with the same function.
  • ISD9160 is a voice recognition chip with integrated local voice wake-up function. It has one ADC function.
  • the voice recognition chip 61 stores a preset voice wake-up command. When the analog signal of the human voice input to the voice recognition chip 61 is converted to be consistent with the preset voice wake-up command, the voice recognition chip 61 sends a wake-up command. Signal to TV motherboard 10.
  • the existing MCU chip technology for processing voice digital signals, and the TV motherboard's technology for processing various commands of the MCU chip and speech recognition chip have been widely used, so the present invention applies to the MCU chip and the TV motherboard itself. Do not go into details.
  • the circuit that integrates the voice wake-up function in the present invention is in the form of a small peripheral board, adopts the architecture of MCU + ADC + encryption chip + ISD9160, and externally connects 4 analog Mic, which can make the TV in a true standby mode where the power consumption of the whole machine is lower than 0.5W In the case, the standby wake-up function of the far-field voice module is realized.
  • the entire circuit design has simple peripheral circuits and sophisticated concepts. On the basis of the local voice standby wake-up function, it can effectively reduce the power consumption of the entire TV set and meet the requirements of energy saving and environmental protection.
  • the present invention also provides a television, which includes the above-mentioned circuit with integrated voice wake-up function, so that the television can have the above-mentioned advantages to adapt to the development trend of science and technology.
  • the present invention also provides a television-based voice control method, which includes the following steps:
  • the microphone unit collects analog signals of human voices within a preset range, and sends the analog signals to the analog-digital conversion unit;
  • the analog-to-digital conversion unit converts the analog signal of the human voice into a digital signal and outputs it to the TV motherboard;
  • the TV motherboard processes the converted digital signals and performs corresponding feedback operations
  • the microphone unit collects analog signals of human voices within a preset range, and sends the analog signals to the voice wake-up unit;
  • the voice wake-up unit processes the analog signal of the human voice and outputs a wake-up signal to the TV motherboard;
  • the TV motherboard After receiving the wake-up signal, the TV motherboard changes the TV from a standby working state to a normal working state.
  • the preset range is set within a range of ten meters in the circumference of the television, and the feedback operation of the television main board includes changing channels, adjusting volume, and the like.
  • the step S20 specifically includes:
  • the analog-to-digital conversion unit converts an analog signal of a human voice into a digital signal
  • the encryption unit performs encryption processing on the converted digital signal
  • the analog-to-digital conversion unit sends the encrypted digital signal to the main control unit.
  • the four-way MIC collects the analog signal of the human voice and inputs it to the ADC chip.
  • the ADC chip converts the analog human voice signal into a digital I2S signal and transmits it to the main control chip MCU of the far-field voice module for processing, and the communication process between the ADC chip and the MCU is encrypted by the encryption chip through the I2C protocol.
  • the main control chip MCU processes the I2S signals transmitted by the ADC chip, and converts them into signals D + and D- that pass the USB protocol to the TV motherboard for processing.
  • the TV motherboard then performs corresponding feedback operations, which completes a complete system when the TV starts Voice interaction process.
  • the step S50 specifically includes:
  • the voice wake-up unit processes the collected analog signal of the human voice, and compares the processed signal with a preset voice wake-up command;
  • ISD9160 works normally.
  • the human voice wakes up the TV through a specific voice command, and the analog signal of the human voice is transmitted to the ISD9160 through the MIC4 microphone.
  • a built-in ADC in ISD9160 processes the analog signal and converts it into a digital signal (ie, a wake-up signal) for processing by the TV motherboard.
  • the TV motherboard After receiving the wake-up signal, the TV motherboard turns on the TV, which completes the TV from standby to power-on. Voice interaction process.
  • the vocal command corresponding to the preset voice wake-up command may be "turn on”, “turn on the TV”, “wake the TV”, and so on.
  • the present invention provides a circuit with integrated voice wake-up function, a television, and a voice control method, wherein the circuit with integrated voice wake-up function includes a television motherboard and a far-field voice module, and the far-field voice module includes : Microphone unit for collecting analog signals of human voices; Analog-to-digital conversion unit for converting analog signals of human voices into digital signals; Main unit for processing and outputting the converted digital signals to the TV motherboard ; Used to process the analog signal of human voice and output the wake-up signal to the voice wake-up unit of the TV motherboard; the microphone unit is connected to the analog-to-digital conversion unit and the voice recognition unit, the analog-to-digital conversion unit is respectively connected to the main control unit and the TV motherboard, and the TV motherboard is respectively Connect the main control unit and the voice wake-up unit.
  • the invention can effectively reduce the overall power consumption of the TV on the basis of realizing the local voice standby wake-up function of the TV, thereby meeting the requirements of energy saving and environmental protection.

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  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
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  • Acoustics & Sound (AREA)
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Abstract

一种集成语音唤醒功能的电路、电视和语音控制方法，其中，集成语音唤醒功能的电路包括电视主板（10）和远场语音模块（20），远场语音模块（20）包括：用于采集人声的模拟信号的麦克风单元（30）；用于将人声的模拟信号转换为数字信号的模数转换单元（40）；用于对转换后的数字信号进行处理并输出到电视主板（10）的主控单元（50）；用于处理人声的模拟信号并输出唤醒信号到电视主板（10）的语音唤醒单元（60）；麦克风单元（30）分别连接模数转换单元（40）和语音识别单元，模数转换单元（40）分别连接主控单元（50）和电视主板（10），电视主板（10）分别连接主控单元（50）和语音唤醒单元（60）。在实现电视的本地语音待机唤醒功能的基础上，有效降低电视的整机功耗，从而符合节能环保的要求。

Description

一种集成语音唤醒功能的电路、电视和语音控制方法 技术领域
本发明涉及智能电视技术领域，特别涉及一种集成语音唤醒功能的电路、电视和语音控制方法。
背景技术
目前，为了使电视产品拥有更好的用户体验，目前各大电视厂商的旗舰机型电视纷纷将内置远场语音功能作为一大卖点，实现无遥控器的语音交互。但是现有的远场语音技术还无法做到真正的待机唤醒功能，即在整机功耗低于0.5W的情况下将电视唤醒。现有的待机唤醒技术是假待机，即电视主板还在正常工作，只是将背光显示关掉，使电视屏幕看不到显示的任何东西，从而误导消费者认为其是真待机模数。这种假待机唤醒功能跟真待机唤醒功能相比，其电视主板一直处在工作负荷状态，导致功耗大大增加，不符合节能环保的要求。
因而现有技术还有待改进和提高。
发明内容
鉴于上述现有技术的不足之处，本发明的目的在于提供一种集成语音唤醒功能的电路、电视和语音控制方法，可在实现电视的本地语音待机唤醒功能的基础上，有效降低电视的整机功耗，从而符合节能环保的要求。
为了达到上述目的，本发明采取了以下技术方案：
一种集成语音唤醒功能的电路，包括电视主板和远场语音模块，所述远场语音模块包括：
用于采集人声的模拟信号的麦克风单元；
用于将人声的模拟信号转换为数字信号的模数转换单元；
用于对转换后的数字信号进行处理并输出到电视主板的主控单元；
用于处理人声的模拟信号并输出唤醒信号到电视主板的语音唤醒单元；
麦克风单元分别连接模数转换单元和语音识别单元，模数转换单元分别连接 主控单元和电视主板，电视主板分别连接主控单元和语音唤醒单元。
所述的集成语音唤醒功能的电路中，所述语音唤醒单元包括语音识别芯片、第一线性稳压器和PMOS管开关电路，所述语音识别芯片的IO接口连接电视主板的IO接口，所述语音识别芯片的vcc端连接第一线性稳压器的输出端，第一线性稳压器的输入端连接PMOS管开关电路的输出端，PMOS管开关电路的输入端连接电视主板的5V-STB端。
所述的集成语音唤醒功能的电路中，所述语音识别芯片中存储有预设的语音唤醒命令。
所述的集成语音唤醒功能的电路中，所述语音识别芯片的型号为ISD9160。
所述的集成语音唤醒功能的电路中，所述远场语音模块还包括加密单元，所述数字信号为I2S信号，所述加密单元用于对主控单元和模数转换单元之间的的通信过程通过I2C协议进行加密处理。
一种电视，包括如以上任意一项中所述的集成语音唤醒功能的电路。
一种基于所述电视的语音控制方法，包括如下步骤：
当电视处于正常工作状态时，麦克风单元采集预设范围内的人声的模拟信号，并发送给模数转换单元；
模数转换单元将人声的模拟信号转换为数字信号并输出到电视主板；
电视主板对转换后的数字信号进行处理后，执行相应的反馈操作；
当电视处于待机工作状态时，麦克风单元采集预设范围内的人声的模拟信号，并发送到语音唤醒单元；
语音唤醒单元对人声的模拟信号进行处理并输出唤醒信号到电视主板；
电视主板收到唤醒信号后，使电视从待机工作状态转为正常工作状态。
所述的语音控制方法中，所述语音唤醒单元对人声的模拟信号进行处理并输出唤醒信号到电视主板的步骤具体包括：
语音唤醒单元对采集的人声的模拟信号进行处理，并将处理后的信号与预设的语音唤醒命令进行对比；
若处理后的信号与预设的语音唤醒命令一致，则输出唤醒信号到电视主板；
若处理后的信号与预设的语音唤醒命令不一致，则不输出唤醒信号到电视主板。
所述的语音控制方法中，模数转换单元将人声的模拟信号转换为数字信号并输出到电视主板的步骤具体包括：
模数转换单元将人声的模拟信号转换为数字信号；
加密单元对转换后的数字信号进行加密处理；
模数转换单元将加密后的数字信号发送到主控单元。
相较于现有技术，本发明提供了一种集成语音唤醒功能的电路、电视和语音控制方法，其中所述集成语音唤醒功能的电路，包括电视主板和远场语音模块，所述远场语音模块包括：用于采集人声的模拟信号的麦克风单元；用于将人声的模拟信号转换为数字信号的模数转换单元；用于对转换后的数字信号进行处理并输出到电视主板的主控单元；用于处理人声的模拟信号并输出唤醒信号到电视主板的语音唤醒单元；麦克风单元分别连接模数转换单元和语音识别单元，模数转换单元分别连接主控单元和电视主板，电视主板分别连接主控单元和语音唤醒单元。本发明可以在实现电视的本地语音待机唤醒功能的基础上，有效降低电视的整机功耗，从而符合节能环保的要求。
附图说明
图1为本发明提供的集成语音唤醒功能的电路的结构框图；
图2为本发明提供的集成语音唤醒功能的电视的语音控制方法的流程图；
图3为本发明提供的集成语音唤醒功能的电视的语音控制方法中步骤S20的流程图；
图4为本发明提供的集成语音唤醒功能的电视的语音控制方法中步骤S50的流程图。
具体实施方式
鉴于上述现有技术的不足之处，本发明的目的在于提供一种集成语音唤醒功能的电路、电视和语音控制方法。为使本发明的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
请参阅图1，为本发明提供的集成语音唤醒功能的电路的结构框图，其包括 电视主板10和远场语音模块20，所述远场语音模块20包括：
用于采集人声的模拟信号的麦克风单元30；
用于将人声的模拟信号转换为数字信号的模数转换单元40；
用于对转换后的数字信号进行处理并输出到电视主板10的主控单元50；
用于处理人声的模拟信号并输出唤醒信号到电视主板10的语音唤醒单元60；
麦克风单元30分别连接模数转换单元40和语音识别单元，模数转换单元40分别连接主控单元50和电视主板10，电视主板10分别连接主控单元50和语音唤醒单元60。
其中，远场语音模块20整体可以采用外设小板并接口连接的方式与电视主板10连接，方便在现有的电视电路架构上增加本发明提供的集成语音唤醒功能的电路。
具体的，麦克风单元30包括4路模拟MIC，分别为MIC1～MIC4。当用户在预设范围内发出声音时，麦克风单元30可以采集到对应的人声的模拟信号，并分别发送给模数转换单元40和语音唤醒单元60。模数转换单元40包括模数转换器41和第二线性稳压器42，电视主板10通过5V_USB接口并经过第二线性稳压器42降压至1.8V后，为模数转换器41提供一部分的供电。
更具体的，所述主控单元50包括MCU芯片51，所述MCU芯片51与电视主板10之间采用USB协议的信息传输形式。USB信号是差分信号，用一对线传输一个信号，D+和D-应该就是这样的一对差分信号，负责传输Data信号即数据。所谓差分信号的意思是当要传输高电平时，一根线(比如是D+)送的是高电平，而另一根配对的线上传输的是低电平，要送低电平时，D+送低，D-送高，这样两根线上送的信号相位是反的，这样可以提高抗干扰的能力，从而能提高数据传输的速率。本实施例中MCU芯片的型号优选为STM32F401CDU6。
其次，主控单元50还包括晶振芯片52和第三线性稳压器53。电视主板10还可通过5V_USB接口并经过第三线性稳压器53降压至3.3V后，为MCU芯片51供电，以及还可为模数转换器41提供另一部分的供电。晶振芯片52可给MCU芯片51提供其所需的时钟频率，且本实施例中晶振芯片52的频率选用为16MHz。
此外，所述远场语音模块20还包括加密单元70，所述数字信号为I2S信号，所述加密单元70用于对主控单元50和模数转换单元40之间的的通信过程通过I2C协议进行加密处理，保护用户隐私安全。加密单元70可通过加密芯片实现其功能，具体可选用SMEC98SC、ESAM885A5等支持I2C通信接口的加密芯片。当然，选用的加密芯片能实现加密单元70的功能即可，本发明对加密芯片的具体型号不做限定。
更具体的，所述语音唤醒单元60包括语音识别芯片61、第一线性稳压器62和PMOS管开关电路63，所述语音识别芯片61的IO接口连接电视主板10的IO接口，所述语音识别芯片61的vcc端连接第一线性稳压器62的输出端，第一线性稳压器62的输入端连接PMOS管开关电路63的输出端，PMOS管开关电路63的输入端连接电视主板10的5V-STB端。
其中，Power_en接口是电视主板10给语音识别芯片61的控制IO口，当电视开机时Power_en接口输出高电平，电视待机时Power_en接口输出低电平。Power_on接口是语音识别芯片61给电视主板10的反馈IO口，当电视开机时Power_on输出高电平，当电视待机时Power_on输出低电平。
较佳的，所述语音识别芯片61的型号为ISD9160，当然也可为其他具有相同功能的不同型号的语音识别芯片。ISD9160是集成本地语音唤醒功能的语音识别芯片，其自带一路ADC功能。并且，所述语音识别芯片61中存储有预设的语音唤醒命令，当输入语音识别芯片61的人声的模拟信号经过转换后与预设的语音唤醒命令一致时，语音识别芯片61即发送唤醒信号至电视主板10。
同时，现有的对语音数字信号进行处理的MCU芯片的技术、以及电视主板对MCU芯片和语音识别芯片的各种命令的处理的技术已经被广泛应用，故本发明对MCU芯片和电视主板本身不做赘述。
本发明中集成语音唤醒功能的电路以外设小板的形式，采用MCU+ADC+加密芯片+ISD9160的架构，外接4颗模拟Mic，能够使电视在处于整机功耗低于0.5W的真待机的情况下，实现远场语音模块的待机唤醒功能。整个电路设计***电路简单，构思精巧，在实现本地语音待机唤醒功能的基础上，能有效降低电视整机功耗，符合节能环保要求。
本发明还提供一种电视，其包括上述的集成语音唤醒功能的电路，从而使所 述电视可以具备上述优点，以适应科技的发展趋势。
请参阅图2，本发明还提供一种基于所述电视的语音控制方法，其包括如下步骤：
S10、当电视处于正常工作状态时，麦克风单元采集预设范围内的人声的模拟信号，并发送给模数转换单元；
S20、模数转换单元将人声的模拟信号转换为数字信号并输出到电视主板；
S30、电视主板对转换后的数字信号进行处理后，执行相应的反馈操作；
S40、当电视处于待机工作状态时，麦克风单元采集预设范围内的人声的模拟信号，并发送到语音唤醒单元；
S50、语音唤醒单元对人声的模拟信号进行处理并输出唤醒信号到电视主板；
S60、电视主板收到唤醒信号后，使电视从待机工作状态转为正常工作状态。
其中，所述预设范围设置为电视的圆周十米范围内，电视主板的反馈操作包括更换频道，调节音量等等。
进一步的，请参阅图3，所述步骤S20具体包括：
S21、模数转换单元将人声的模拟信号转换为数字信号；
S22、加密单元对转换后的数字信号进行加密处理；
S23、模数转换单元将加密后的数字信号发送到主控单元。
当电视正常开机工作时，人在一定距离范围内对着四路MIC说话，四路MIC采集到人声的模拟信号之后，输入到ADC芯片。ADC芯片将模拟的人声信号转化为数字的I2S信号，传输到远场语音模块的主控芯片MCU中处理，并且ADC芯片和MCU的通信过程由加密芯片通过I2C协议进行加密处理。主控芯片MCU对ADC芯片传输过来的I2S信号进行处理，转化为走USB协议的信号D+、D-给电视主板处理，电视主板再进行相应的反馈操作，这样就完成了电视开机时一个完整的语音交互过程。
更进一步的，请参阅图4，所述步骤S50具体包括：
S51、语音唤醒单元对采集的人声的模拟信号进行处理，并将处理后的信号与预设的语音唤醒命令进行对比；
S52、若处理后的信号与预设的语音唤醒命令一致，则输出唤醒信号到电视主板；
S53、若处理后的信号与预设的语音唤醒命令不一致，则不输出唤醒信号到电视主板。
当电视处于待机工作状态时，电视主板给远场语音模块的5V_USB电压为0，因此主控芯片MCU、ADC芯片和加密芯片此时都不工作；电视主板给远场语音模块的5V_STB正常供电，ISD9160正常工作。电视待机时，人声通过特定的语音命令唤醒电视开机，通过MIC4这个麦克风将人声的模拟信号传输到ISD9160。ISD9160中内置的一路ADC对所述模拟信号进行处理转换为数字信号(即唤醒信号)给电视主板进行处理，电视主板接收到唤醒信号后，使电视开机，这样就完成了电视从待机到开机的语音交互过程。其中，预设的语音唤醒命令对应的人声命令可以是“开机”、“打开电视”、“唤醒电视”等等。
综上所述，本发明提供的一种集成语音唤醒功能的电路、电视和语音控制方法，其中，所述集成语音唤醒功能的电路包括电视主板和远场语音模块，所述远场语音模块包括：用于采集人声的模拟信号的麦克风单元；用于将人声的模拟信号转换为数字信号的模数转换单元；用于对转换后的数字信号进行处理并输出到电视主板的主控单元；用于处理人声的模拟信号并输出唤醒信号到电视主板的语音唤醒单元；麦克风单元分别连接模数转换单元和语音识别单元，模数转换单元分别连接主控单元和电视主板，电视主板分别连接主控单元和语音唤醒单元。本发明可以在实现电视的本地语音待机唤醒功能的基础上，有效降低电视的整机功耗，从而符合节能环保的要求。
可以理解的是，对本领域普通技术人员来说，可以根据本发明的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本发明所附的权利要求的保护范围。

Claims (10)

  1. 一种集成语音唤醒功能的电路，其特征在于，包括电视主板和远场语音模块，所述远场语音模块包括：
    用于采集人声的模拟信号的麦克风单元；
    用于将人声的模拟信号转换为数字信号的模数转换单元；
    用于对转换后的数字信号进行处理并输出到电视主板的主控单元；
    用于处理人声的模拟信号并输出唤醒信号到电视主板的语音唤醒单元；
    麦克风单元分别连接模数转换单元和语音识别单元，模数转换单元分别连接主控单元和电视主板，电视主板分别连接主控单元和语音唤醒单元。
  2. 根据权利要求1所述的集成语音唤醒功能的电路，其特征在于，所述语音唤醒单元包括语音识别芯片、第一线性稳压器和PMOS管开关电路，所述语音识别芯片的IO接口连接电视主板的IO接口，所述语音识别芯片的vcc端连接第一线性稳压器的输出端，第一线性稳压器的输入端连接PMOS管开关电路的输出端，PMOS管开关电路的输入端连接电视主板的5V-STB端。
  3. 根据权利要求2所述的集成语音唤醒功能的电路，其特征在于，所述语音识别芯片中存储有预设的语音唤醒命令。
  4. 根据权利要求2所述的集成语音唤醒功能的电路，其特征在于，所述语音识别芯片的型号为ISD9160。
  5. 根据权利要求1所述的集成语音唤醒功能的电路，其特征在于，所述远场语音模块还包括加密单元，所述数字信号为I2S信号，所述加密单元用于对主控单元和模数转换单元之间的的通信过程通过I2C协议进行加密处理。
  6. 根据权利要求1所述的集成语音唤醒功能的电路，其特征在于，所述主控单元包括MCU芯片，所述MCU芯片与电视主板之间采用USB协议的信息传输形式。
  7. 一种电视，其特征在于，包括如权利要求1-6中任意一项中所述的集成语音唤醒功能的电路。
  8. 一种基于权利要求7所述的电视的语音控制方法，其特征在于，包括如下步骤：
    当电视处于正常工作状态时，麦克风单元采集预设范围内的人声的模拟信号，并发送给模数转换单元；
    模数转换单元将人声的模拟信号转换为数字信号并输出到电视主板；
    电视主板对转换后的数字信号进行处理后，执行相应的反馈操作；
    当电视处于待机工作状态时，麦克风单元采集预设范围内的人声的模拟信号，并发送到语音唤醒单元；
    语音唤醒单元对人声的模拟信号进行处理并输出唤醒信号到电视主板；
    电视主板收到唤醒信号后，使电视从待机工作状态转为正常工作状态。
  9. 根据权利要求8所述的语音控制方法，其特征在于，所述语音唤醒单元将人声的模拟信号进行处理并输出唤醒信号到电视主板的步骤具体包括：
    语音唤醒单元对采集的人声的模拟信号进行处理，并将处理后的信号与预设的语音唤醒命令进行对比；
    若处理后的信号与预设的语音唤醒命令一致，则输出唤醒信号到电视主板；
    若处理后的信号与预设的语音唤醒命令不一致，则不输出唤醒信号到电视主板。
  10. 根据权利要求9所述的语音控制方法，其特征在于，模数转换单元将人声的模拟信号转换为数字信号并输出到电视主板的步骤具体包括：
    模数转换单元将人声的模拟信号转换为数字信号；
    加密单元对转换后的数字信号进行加密处理；
    模数转换单元将加密后的数字信号发送到主控单元。
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