Voiceprint Technology (I): the past and present life of voiceprint Technology

1.1　 What is voiceprint

Speaking of “ The fingerprint ”, No one will feel strange . China is recognized as the first country in the world to use fingerprints , since 3000 Since the Western Zhou Dynasty many years ago , There are official documents 、 The practice of putting a fingerprint on a contract . In many police and bandits 、 In detective stories , We can see , Lock down the suspect with fingerprints , It is one of the most basic means to solve a case . When we travel abroad , If you need to apply for visas from other countries , They are often asked to go to the embassy for fingerprint scanning . And now most smart phones , It also selects fingerprint unlocking as its default unlocking method .

It's no exaggeration to say , Fingerprint identification technology , It has already spread to every one of us . The reason why fingerprint technology can be so widely used , Root cause , Lies in an important fact , That's it —— We all have different fingerprints .

Compared with fingerprints ,“ A voiceprint ” The concept of is very strange to most people . Fingerprints are very intuitive , It is a kind of visible 、 A palpable feature . If you look closely, you can find , The fingerprint of each of our fingers has some features that are easy to remember , For example, the bifurcation point 、 Number of terminal points and spirals 、 Position and shape , wait .

And the voice , Does not have the true meaning of “ texture ”. The name voiceprint itself , If you bite the bullet , You will find that it is more an analogy from the literal point of view . As a matter of fact , Whether in Chinese , Still in English , A voiceprint （voiceprint） The word" , At first, it was fingerprints （fingerprint） Derived from the concept of .

We all know , Different people , The voice is different . Everyone's vocal organ , Including vocal cords 、 Acoustic tube, etc , There will be differences in size and shape . Generally speaking , The male voice is deeper , Women's voices are more shrill , Children's voices are more tender , The old man's voice is more vicissitudes . so , Gender and age are two important factors that affect people's voice .