The ISD1420 voice chip may be able to solve your problem. The ISD1420 can be recorded/played in segments, up to 160 segments, and the maximum recording time is 20 seconds.
ISD1700 series chip is a single chip high-quality voice recording and playback circuit launched by Winbond, the chip provides1730, ISD1760... Select the appropriate recording duration for the specific chip as needed.
ISD1760 belongs to the 1700 series, if applied in STC89C51, it can be controlled by analog SPI, and the instructions involved can be controlled by SPI, and the program is not difficult to control. I see PDF inside the timing simulation is not very difficult, control is also flexible.
1. NRK10 speech recognition chip is a high-performance, low-cost offline speech recognition chip independently developed by Guangzhou Jiuxin Electronics, with speech recognition and broadcasting functions, which requires external SPI-Flash to store terms or voice broadcast content. It has the advantages of high recognition rate, industrial grade performance, simple to use, easy to update terms and so on.
2, ICRoute company's LD3320, a non-specific person's speech recognition chip, the MCU can pass the Chinese pinyin string identification words to LD33 by reading and writing registers20, start speech recognition work. This individual thinks best.
3, recommended to use YQ5969, the module series can support 1-8 MI head, the voice chip can provide different solutions of single-core - 4-core 32bit ARM core according to the specific needs of customers, can support local and cloud identification of different needs. The local recognition rate within 5 meters is more than 93%, and the cloud recognition rate is 97%.
With the ISD voice chip, record the voice into the ISD voice chip. Each recording of a voice, the corresponding stored in an address, when you want to read the voice as long as the single chip computer to send the address of the corresponding voice can be read by the voice chip. Specifically, you can understand the ISD series of voice chip information.
Voice chip and single chip microcomputer is the perfect combination of digital magic and microcomputer. Voice chip is a hardware device that can store and play voice information, which usually contains a digital signal processor (DSP) and memory, which can transmit voice signalsConverted into digital signals for storage and playback.
First of all, there must be a sensor to convert the sound into an electrical signal, you can use a electret microphone, and then add an audio amplifier circuit, and the amplifier output is connected to the ADC (analog-to-digital converter) of the MCU.