hd in mobile phone means "Volte high-definition voice call technology"; hd means that the user has opened volet high-definition voice call service, which can improve the signal and quality of the call. Volte high-definition call technology can be understood as a kind of IP data Transmission and service bearer are all based on 4G network, which combines the unification of data and voice.
The operating environment of this tutorial: OriginOS 2.0 system, VIVO X80 mobile phone.
The letters HD represent Volte high-definition voice call technology. Compared with traditional call technology, this call technology has faster answer times and clearer voice calls. , The advantage of low call drop rate. Through VOLTE technology, when making calls on mobile phones, we can make high-definition video calls and high-definition voice calls.
What does HD mean when it appears on the top of the mobile phone?
HD means that the user has opened volte high-definition voice call service, which can improve the signal and quality of the call. In layman's terms, it means that you can enjoy the 4G Internet experience at the same time as you make and receive calls. VoLTE strictly speaking: it is a kind of IP data transmission, and the business bearer is all based on the 4G network, which combines the unification of data and voice.
HD Advantages
Get through the phone quickly. When making a call in the past, it took 5-6 seconds to connect the call. With VOLTE, the time to connect the call has been shortened to about 2 seconds.
Video and voice are clearer. After activating VOLTE, when making video calls, the picture will be high-definition and clearer; the sound quality of voice calls will be clearer and more natural.
You can make calls and surf the Internet at the same time. Generally speaking, as long as you make a call, the mobile phone signal will weaken, and the Internet will be affected, or even unable to access the Internet. After activating VOLTE, this problem does not exist. While making calls, we can also surf the Internet stably without interfering with each other.
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VoLTE technology
VoLTE technology is based on the 4G network and mainly helps users improve their phone calls Signal, quality, stability, and non-interference with the network allow both parties to have a better experience during interactive calls. The core of "VoLTE" technology is to formulate a "wireless communication standard" through a special architecture, which allows mobile phones and data terminals to interact at high speed and utilize bandwidth more effectively.
The most direct experience that VoLTE technology brings to 4G users is shorter waiting time for connection, and higher quality and more natural audio and video call effects. VoLTE is fundamentally different from 2G and 3G voice calls. VoLTE is an end-to-end voice solution based on all-IP conditions on the 4G network. Compared with 2G and 3G voice calls, VoLTE can improve voice quality by about 40% because it uses high-resolution codec technology.
For operators, deploying VoLTE means opening the road to mobile broadband voice evolution. In the long run, this will bring two values to operators. One is to improve wireless spectrum utilization and reduce network costs. Because for voice services, the spectrum utilization efficiency of LTE is far superior to that of traditional standards, reaching more than 4 times that of GSM. Another value is to improve user experience. The VoLTE experience is significantly better than traditional CS voice. First, the introduction of high-definition voice and video codecs has significantly improved communication quality; second, the call connection time of VoLTE has been greatly shortened, and tests have shown that VoLTE is more than half shorter than CS calls; third, seamless integration with RCS can bring a wealth of business.
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