Speech recognition accuracy: The speech recognition accuracy of different chips may be different, and the appropriate accuracy level needs to be selected according to the specific application requirements. Processing speed and efficiency: The processing speed and efficiency of the voice recognition chip directly affect the response time and performance of the system, and it is necessary to choose the appropriate processing capability according to the actual application scenario.
The main feature of the voice chip is low power consumption,Strong anti-interference ability, few peripheral devices, simple control, long voice storage time (some voice chips can save the content for 100 years), no loss of voice after power failure, some chips can also repeatedly erase and write voice content. Such as car reversing radar, bus stopping device, bank queue machine, voice toys, anti-theft system and other equipment are equipped with voice chips.
Solution 1: MCU 74HC573 latch chip clock chip voice broadcast chip; Scheme 2: MCU 74HC573 latch chip crystal oscillator voice broadcast chip; The solution we will describe below only requires an MCU
The second flash voice chip , called the flash voice chip flash voice chip , is usually a master chip attached to a spiflash, the master chip is unchanged, and flash can be repeatedly burned, But the voice often only supports wav, ADMP, so the sound quality will be very poor compression, flasThe capacity required by h is also very large and not cost-effective. Representative such as WT588D, this is through the spiflash burner to complete the voice burning.
Guangzhou Nine core electronic MP3 chip N9200, N920N9100, N9102 can be external flash voice chip ; If you want to built-in FLASH voice chip you can look at the NVF chip. These FLASH capacity sizes can be selected according to user needs.
Store audio data flash voice chip : SPI Flash is used to store audio data, including voice commands, voice prompts, recordings, etc. As a built-in storage medium, SPI Flash provides fast and reliable access so that audio data can be efficiently loaded and played. System configuration flash voice chip : SPI Flash is also used to store system configuration information, such as voice compression algorithm, audio format Settings, volume adjustment, and so on.
1, is to read/write flash voice chip the underlying program to write into the programmable voice chip flash voice chip , of course, you can also write the sound file together. If the program supports flash voice chip , it can also be external memoryflash voice chip to achieve the function of sound storage expansion. A variety of voice chips flash voice chips , the use of methods are also different, such as OTP voice chips are disposable and repeatable voice chips are programmable.
2, the second, called flash voice chip, is usually a master chip attached to a spiflash, the master chip is unchanged, and flash can be repeatedly burned, but the voice often only supports wav, so the sound quality will be very poor compression.
3, such as KT148A-SOP8 is through the serial port to burn voice, that is, USB to serial port TTL, simple and convenient, low cost and KT404A chip, more powerful, is connected to the computer through the chip's own usb, direct copy of the way similar to virtual U disk operation logic. KT148A is a 32-bit DSP voice chip in a standard SOP8 package.