In the field of aiot, an important core technology is intelligent voice. The product that has the greatest impact on IOT devices is intelligent voice. Intelligent voice assistant will bring a huge technological revolution to IOT devices. In fact, smart voice is no longer a new thing. There are smart voice masters abroad, such as apple Siri, Microsoft Xiaona, Google assistant and Amazon’s Alexa. There are later followers such as Lingxi assistant (iFLYTEK), Xiaodu (Baidu) and Xiaoai classmate (Xiaomi) in China. One of the keys of intelligent voice is voice interaction, and to achieve voice interaction, the front and back end processing of voice is indispensable.

When it comes to sound processing technology, you will first think of Zhuhai torch core technology. Torch core technology has been deeply engaged in the sound field for more than 20 years. It is known as a domestic sound preprocessing expert. It has very exclusive advantages in sound preprocessing technology and has deep attainments in low power consumption and sound preprocessing technology. In terms of sound pickup technology, the whole column of dual microphones has been adopted, and it is also very leading in offline and online voice processing. At the same time, it also depends on the experience and technology accumulation of torch core technology in the industry for more than 20 years.

Over the past 30 years, torch core technology has been carrying out sound processing, such as MP3 (sound post-processing technology), sound retention and storage of recording pen (sound pre-processing), sound microphone recognition, sound echo cancellation and noise reduction (sound pre-processing), post-processing sound effect enhancement (sound post-processing technology), etc.

According to the explanation of Mr. Tao Yongyao, a market expert of torch core technology, the pre-processing technology of sound is the processing before sound is not transmitted and stored. The purpose of sound preprocessing is to make the storage and transmission efficiency of sound higher and the recognition rate better. (for example, echo cancellation, noise reduction, sound activity detection, etc.) sound preprocessing technology is actually to solve the two things of “hearing” and “hearing” of the machine, so as to achieve the purpose of “understanding”. The “hearing” of sound mainly depends on the microphone. The main form is a single microphone or microphone array (multiple microphones are arranged according to certain rules to obtain and process sound in a specific space). The microphone based speech signal processing algorithm is the key to make the sound “understand”. Microphone + algorithm, arranged and combined in different environments, and finally achieve “listening” and “understanding”.

The post-processing technology of sound is the simultaneous processing of sound playing after storage. It is the sound effect enhancement processing for the sound decoded and played by the sound source such as MP3 (such as virtual subwoofer, surround stereo, treble enhancement, EQ, etc.). The pre-processing technology of sound is the processing before the sound is not transmitted and stored. The purpose of sound preprocessing is to make the storage and transmission efficiency of sound higher and the recognition rate better (such as echo cancellation, noise reduction, sound activity detection, etc.).

In the field of intelligent voice, torch core has mastered the key technologies of sound pre-processing and sound post-processing. These technologies are undoubtedly very important for the development of intelligent voice, and intelligent voice is the most key technology application in aiot industry. These voice interaction technologies of torch core can promote the market development of intelligent voice, so as to enable more aiot devices to land.

       

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