Analysis of principle of voiceprint lock and voiceprint recognition technology
How does voicelock work? What is the principle of voice print recognition technology? Sound lock is also a new breed of intelligent door lock. Using voiceprint recognition technology to unlock the lock has also been applied in the door lock. Voice print lock and fingerprint lock have the same idea, and fingerprint lock based on fingerprint recognition technology is different, voice print lock is the technical recognition of voice, this article will explain the technical principle of voice print lock recognition.
What is a voicelock
The voice print lock applies the voice print recognition to the access control system to realize the myth of the legendary open Sesame. Voiceprint lock is a specific application of voiceprint recognition technology based on voiceprint recognition technology. They are said to be common in countries such as Japan, where they use them indoors for basic privacy.
Speech biometrics recognition, also known as speaker recognition, commonly known as voice print recognition, is a biometrics method that automatically identifies the speaker according to the speaker’s pronunciation physiological and behavioral characteristics. Voice print provides security comparable to other biometrics such as fingerprints, palm shapes and iris, and inexpensive voice capture devices require only a phone/cell phone or microphone, no special equipment required. It has nothing to do with spoken language, has nothing to do with dialect tone, does not involve privacy issues, and ADAPTS to a wide range of people; Voice signal is convenient for remote transmission and acquisition. In the application of identity recognition based on telecom and network, voice print recognition is more good at and advantaged.
The working principle of voiceprint lock is introduced in detail
Similar to human fingerprints and DNA, the voice print is also a unique personality biological feature of the human body, and it is difficult to find two people with exactly the same voice print.
Voice print recognition, a form of biometrics. Also known as speaker recognition, there are two types, speaker recognition and speaker confirmation. Different tasks and applications will use different voice print recognition techniques, such as identification for narrowing down a criminal investigation or confirmation for banking transactions. Voiceprint recognition is to convert the sound signal into electrical signal and then identify it with a computer.
The so-called Voiceprint is the spectrum of sound waves that carry verbal information displayed by an electroacoustic instrument. The generation of human language is a complex physiological and physical process between the speech center and articulation organs of the human body. The vocal organs used in speech — tongue, teeth, larynx, lung and nasal cavity — vary greatly in size and shape, so there are differences in the vocal pattern of any two people.
The acoustical characteristics of each person have both relative stability and variability, which are not absolute and invariable. This variation can be physiological, pathological, psychological, simulated, camouflaged, and also related to environmental interference. However, since everyone’s vocal organs are different, people are generally able to distinguish between different voices or determine whether they are the same.
Voiceprint Recognition (VPR), also known as Speaker Recognition, has two types, That is, Speaker Identification and Speaker Verification. The former is used to judge which one of several people speaks a certain speech, which is a “multiple choice” problem; The latter is the “one to one” problem, which is used to confirm whether a speech is spoken by a designated person. Different tasks and applications will use different voice print recognition techniques, such as identification for narrowing down a criminal investigation or confirmation for banking transactions. Both recognition and recognition involve modeling the speaker’s voice print, a process known as “training” or “learning.”
The main tasks of voiceprint recognition include speech signal processing, voiceprint feature extraction, voiceprint modeling, voiceprint comparison, discriminant decision and so on.
Voice print recognition can be said to have two key problems, one is feature extraction, the other is pattern matching (pattern recognition).
The biggest challenge of voxprint lock in application is that it will seriously affect the recognition effect when the environment is noisy. Therefore, the ability to deal with environmental noise has become an important criterion to test the maturity of vox-lock.
In recent years, several domestic enterprises or research institutions have begun to promote this aspect of business, because some technical bottlenecks have not been broken, the actual promotion effect is not optimistic.
Voice print recognition is still a cutting-edge technology in China, so the application of voice print recognition technology is less.
conclusion
At present, the application of voice print recognition in access control system is not mature, but it is also a research direction of intelligent lock.