Wireless screen mirroring refers to a way for smart mobile device clients to display their own screen images and sounds on another display device through WIFI, thereby achieving same screen display. With the rapid development of business screen casting technology, there are more and more electronic products that support screen casting. So, what are the implementation technologies for wireless screen casting?
1. AirPlay screen mirroring
Airplay is a wireless technology unique to Apple devices. We can wirelessly transmit text, images, videos, and other information from iOS devices such as iPhone and iPad to devices that support AirPlay through WiFi connection. Due to Apple devices not allowing third-party programs to obtain their screen images, many wireless screen mirroring boxes in China are implemented by cracking the AirPlay protocol.
The operation of screen mirroring is very simple. If you are an Apple phone, use your finger to scroll down the phone screen, call out the detailed panel in the control center, click on “screen mirroring” ->select the device ->perform screen mirroring. The Apple iPad also uses “screen mirroring” for screen mirroring, but the control center is located at the bottom of the screen or in the top right corner of the screen.
It is worth noting that using AirPlay screen mirroring requires ensuring that the Apple device and projector are on the same LAN (same network segment), and cannot be used across network segments or VLANs. It can be difficult for enterprises responsible for network architecture to use.
2. Miracast Multi Screen Interaction
Miracast is the certification name of the Wi Fi Alliance for devices that support Wi Fi Display functionality. Miracast screen casting technology is mainly used on two types of devices:
(1) Android phones that partially support multi screen interaction
Android 5.0 and above phones usually come with the Miracast screen mirroring protocol, which allows for wireless display through internal settings without the need to install any software or rely on any network support.
(2) Windows 8/10 computer
The WiDi protocol, which is natively supported on Windows 8/10 computers, is improved based on the Miracast protocol and allows for screen mirroring without the need for any software installation.
However, Miracast has two drawbacks that limit its use in high demand situations. Firstly, the underlying layer is the UDP transmission protocol, which is unreliable and susceptible to interference during the transmission process, leading to screen distortion at the receiving end; The second issue is that each Android device manufacturer has designed a different way to open Miracast, which makes it difficult to provide unified training and promote it on a large scale.
3. DLNA push
The full name of DLNA is Digital Living Network Alliance, which aims to solve the interconnection between mobile devices and consumer appliances. DLNA screen mirroring is usually used in combination with Miracast. Due to Miracast being a mirror projection, it can cause damage to the image. And DLNA screen casting adopts the so-called push mode, which essentially pushes the content on the phone in the form of URLs to the large screen (TV or projector) for playback. This method ensures lossless image quality and has certain requirements for the network, but there is no image at the transmitting end, which is mostly used in home theaters and not suitable for enterprises.
4. Private screen mirroring protocol
Generally, screen casting equipment manufacturers have their own customized private screen casting protocols, such as the BJcast protocol, which is a proprietary screen casting protocol developed by Bijie Internet.
Suzhou Bijie Network Co., Ltd. (hereinafter referred to as Bijie) is a leading provider of enterprise intelligent office and smart education products and solutions. It is committed to helping enterprises and education customers improve office learning efficiency, solve communication management problems, and make everything simpler through wireless screen casting, multi screen interaction, and rich intelligent office and smart education products.
5. Wireless screen projection method for HDMI transmitter
HDMI transmitter wireless screen projection method, which means that the HDMI transmitter directly obtains screen projection information from the HDMI output interface of the transmitting end, compresses and encodes it, and sends it to the receiving end. There are two main protocols that use this screen casting method: one is devices that use the WHDI protocol; The second is devices that use the Wireless HD protocol. Its disadvantages are also very obvious. Many transmitting devices do not have HDMI output ports, so this method of screen projection cannot be used.
After reading this article, you should be able to understand that there are five wireless screen mirroring technologies for achieving same screen interaction: Miracast, Airplay, DLNA, enterprise private screen mirroring protocol, and HDMI direct insertion screen mirroring technology. So, which method are you currently using?