Voice chip and single chip microcomputer is the perfect combination of digital magic and microcomputer. A voice chip is a hardware device capable of storing and playing voice information, which usually contains a digital signal processor (DSP) and memory, which can transmit voiceThe signal is converted into a digital signal for storage and playback.
The voice chip is a chip with a special function that can convert our voices into numbers and store them in a small IC. Through clever circuitry, these numbers are restored to a beautiful sound. With the advent of the voice chip, digital magic became a reality.
Parallel control mode voice chip provides key interface, the input and output port of the single chip can control the key interface of the voice chip for recording, playing, deleting, and before and after operation. There is also a voice microcontroller.
2, according to the output mode of the voice chip is divided into two categories, one is PWM output mode, the other is DAC output mode, PWMThe output volume is not continuous and adjustable, can not be connected to ordinary power amplifier, most of the voice chips on the market are PWM output mode.
3, one advantage of PWM is that the signal from the processor to the controlled system is in digital form, and the digital-to-analog conversion is carried out. Can minimize the noise impact (can be the same as a computer). Noise can also affect a digital signal only if it is strong enough to change logic 1 to logic 0 or logic 0 to logic 1.
4, PWM (Pulse Width Modulation) output: voice chip can pass PWMOutput mode to simulate audio signal. The analog output of audio signal can be realized by controlling the width and frequency of pulse. This type of output is typically used to connect to speakers, motors, or other devices that require PWM control.
5, standby power consumption is less than 25ua; Also low power mode 5uA 16bit PWM output, can directly drive 8 ohms /0.5W speaker; Provide tools to convert audio format, all users can operate on their own, very simple 16KHZ maximum can support 200 seconds.
6, NVB seriesMore than 3%, cloud recognition rate of 97%.
For example, the WTV series voice chip can record 4 segments if it is controlled by the key, the SSOP20 package can reach 8 segments, if it is controlled by the serial port, it can reach 207 segments, and the time length is 20s, 40s, 80s, 170s.
can use Nv040D this voice chip, it supports 223 voice addresses and code broadcast, each address put a corresponding number, and then use the MCU to send the corresponding instructions and address can be broadcast out.
The role of the MCU is to switch the input multi-channel conference TV signal, but because the conference TV signal contains three different signals, such as image, voice and data, the switching function of the MCU is not like the telephone exchange just to transfer the voice signal, it needs to process the three kinds of signals differently.
MCU is a single chip computer, which can also be called a single chip microcomputer. The role is to shrink and reduce the frequency and specifications of the CPU, and then the memory, the counter, and so onPut them together, and put them on a single chip, so that they become like a computer.
Even the LCD driver circuit is integrated on a single chip to form a chip-level computer that can be controlled in different combinations for different applications. Such as mobile phones, PC peripherals, remote controls, to automotive electronics, industrial stepper motors, robot arm control, etc., can be seen in the MCU figure.
1, Heilkasati air conditioning voice function can be turned off. The Helcasati air conditioning voice function can be turned off by the air conditioning button or by voice or by the switch button in the lower left corner of the air conditioning control page.
2, Gregory. Haier air conditioning Casady voice call need to say the voice "Gree Jinbei", you can wake up the voice function. The core of Haier air conditioning voice function is to join the NRK3301 voice recognition chip, which has the advantages of accurate recognition and far field noise reduction, and can support no more than 100 offline instructions.
3, equipped with nine core electronic NRK3301 off-line voice module intelligent voice fan, you can use voice control, as long as the user after the command, will isolate the wind noise, accurate recognition of instructions, 5 meters remote recognition, recognition rate reached more than 95%.
4, NRK2202 can make the user's home air conditioning, fans, lights and other equipment become intelligent offline voice recognition interactive infrared program. This offline voice recognition solution can control home appliances by voice without networking or downloading an APP.
AT89C51 chip. According to 51 SCM voice broadcast version information display: 51 SCM voice broadcast design is composed of AT89C51 for the main control chip LCD12864 LCD display clock voice alarm module infrared remote control.
Using the WT588D voice chip. WT588D is a commonly used voice chip, which can be used with 51 single chip microcomputer to realize voice broadcasting function. In the design of bus station announcement system, WT588D can be used as recording module and controlled by 51 single chip microcomputerMake it play different voice files.
can use speech recognition chip LD3320, circuit diagram you can know as long as under its pdf, pdf which has a typical application. But I recommend you not to use this chip, it should be more expensive about 100 yuan. I recommend you to use the Sun 61 microcontroller, with its own voice recognition module, designed for speech.
WTV series voice chip, SYN6288 voice synthesis chip, etc. The WTV series voice chips are manufactured by Waytronic and come in different models and features that can be accessed by pressingKey control or serial port control, support to record and play multiple voice, with different storage capacity and playback duration.
Engage in the single chip computer will not buy a voice chip, a buzzer can be, the caliber should be larger, the specific programming with interrupt timer loading time is a variable This variable needs 7 fixed 7 tones, and then ask to understand music.
TMS320C5409 and Cyclone EP1C3T144C8 FPGA are used as the main processor and coprocessor. 24bit high precision audio dedicated AD/DA conversion chip, especially suitable for applicationFor radio, recording studio and other professional audio processing equipment development.