How does the voice chip burn voice? Come and see how much you know!

Date：2022-01-06 11:52:44 Views：2366

Voice chip is an integrated circuit that can store, control and play voice. It is called speech IC in English. It is an integrated circuit chip with built-in small storage space, 1mbit-4mbit and storage time of 40-160 seconds. It can be controlled by keys or MCU. It is also to convert the voice signal into digital signal through sampling, store it in the ROM of the integrated circuit, and then restore the digital voice signal in the ROM through the circuit. From the meaning of the name, it can be seen that it is a function of adding voice on the basis of electronic products, that is, the input voice is processed through the chip and played out through the speaker.

1、 Common voice formats of voice chip

It mainly includes PCM format, wav format, ADPCM format, MP3 format, linear scale format and logpcm format.

2、 Working principle of voice chip

The voice signal is converted into digital through voice signal sampling, stored in the ROM of the IC, and the digital signal of the ROM is converted into voice signal through the circuit.

The output of the chip includes PWM, DAC and ADC respectively.

1. PWM output: the volume can not be continuously adjusted and can not be connected to ordinary power amplifier, but at present, many voice chips on the market use PWM output mode.

2. DAC output: it is amplified by internal Eq. the chip sound in this output mode supports continuous adjustment, and can be adjusted by external power amplifier and digital control.

3. ADC output: the acquisition process includes voice signal sampling, EQ amplification, compression, etc.

3、 Types of voice chips

It can be roughly divided into three types:

1. OTP type:This type of voice chip has built-in several designated voice, and the content cannot be modified, which can be burned in through a special burner. This is suitable for mass production, and the cost is relatively low.

2. Flash type:This chip can be burned repeatedly, but the supported voice formats are only wav and ADMP. The compressed sound quality will be poor, and its memory demand is also large and the cost is high.

3. Mp3 decoding type:This is a qualitative leap over the above two. It applies MP3 technology to voice chip and has flash function at the same time. The voice effect of this chip is very good, which is equivalent to copy and paste. What sound quality is input, it will output what sound quality is output.

4、 Application scope of voice chip

Home appliance industry:Induction cooker, rice cooker, refrigerator, washing machine, air conditioner, fan, etc;

Security alarm:Reversing radar, forklift alarm, home anti-theft, access control system, etc;

medical apparatus and instruments:Amblyopia therapeutic instrument, sphygmomanometer, ozone therapeutic instrument, blood glucose instrument, etc;

Advertising media:Voice billboards, mirror advertising machines, welcome devices, advertising devices, etc;

Toy series:Speech recognition, cars, dolls and so on;

Intelligent transportation:All in one card equipment, traffic light reminder, etc;

vehicle:Voice electric vehicle, voice bus station, etc;

Gift cards:Greeting card, birthday cake, blessing bell, etc.

The above is about the relevant technical articles on voice chip burning, sorting and summary. Warmly welcome to call and we will serve you wholeheartedly. Chuangxin testing always adheres to the purpose of "professional, authoritative, efficient and innovative". It has invested heavily in purchasing international advanced testing equipment. The testing is in strict accordance with international testing standards and methods. It has obtained CNAs certification and international mutual recognition qualification. Its customer base covers many countries and regions at home and abroad. It is a professional IC testing institution with excellent quality and high popularity in China.