Digital voice communication
Concept
Digital speech communication is a kind of communication method that transmits voice messages in digital form after processing the input analog speech signal. Compared with analog speech communication, digital speech communication has many advantages, such as strong anti-interference ability and no accumulation of noise, controllable transmission error, easy integration, easy processing and storage, easy to carry out security processing and good security, etc. At present, digital speech communication technology has been widely used in communication, multimedia network and consumption and other areas of life.
Digital speech communication system
A basic digital speech communication system is composed of a transmitter, a receiver and a channel. The sender obtains the input speech message at the source and preprocesses it, and then performs source coding, encryption, channel coding and digital modulation on the processed signal, so that the transmitted signal can be transmitted reliably in the channel and the communication bandwidth can be effectively used.
Research direction of digital speech communication
Digital speech communication has developed a number of research and application directions, we can convert into words, into idioms, into speaker emotions, and so on, and can also carry out the reverse direction of transformation. The research direction of digital speech communication is mainly divided into six categories, which are text, speaker, language, emotion, singing rhythm and others. Each category is further subdivided into different research directions. The application of speech recognition in digital speech communication is to convert between speech and text, and the speech assistant of mobile phone basically has speech recognition function. The application of speechprint recognition in digital speech communication is to convert between the speech and the speaker, which has a wide range of applications in security, criminal investigation, payment and other fields.
Your task
Think of applications of digital voice communication in life and give examples.
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