How to realize the principle of writing speech in speech chip recognition system

What is the principle of the speech chip recognition system we often use? Why can the mobile phone accurately convert what we say into words when we speak to the mobile phone? The process of speech recognition, fingerprint recognition and face recognition is basically the same. For example, we said "long live understanding". The mobile phone will first collect our voice through the microphone. Because our voice is an analog signal, after collecting our voice, we should first convert the analog signal into a digital signal, Then the signal is processed. The processing process is similar to our military training. Before the military training, everyone's standing posture and walking posture are very different. During the military training, everyone's standing posture and walking posture are basically the same, so the voice we collect is also a truth.
When we talk, except for noise, the size and speed of each person's voice are different. After processing, these voices are basically the same in size and speed. This can make the subsequent recognition easier. Then we need to start extracting the feature information of the voice signal. Before extracting the feature information, First cut the speech signal into small pieces, and then extract the characteristic information of each small piece, such as tone. After extracting the characteristic information of the speech signal, put the speech signal into an acoustic model, which has the pronunciation of all words, Then find the pronunciation that best matches our voice in the acoustic model, and then put it into another language model. In this speech model, there are all kinds of words we say, sentences we see, ancient poetry, classical Chinese, etc. the speech recognition system looks in this to see which sentence's pronunciation is closest to the pronunciation of "long live understanding", This is the general principle of speech chip recognition system.

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Keyword：Voice Chip   Fingerprint Recognition   Face Recognition   Analog Signal   Digital Signal   Commax-Tech Electronic