Modern Xiaomi smartphones have powerful screens and multimedia capabilities that often make for a great display. Image broadcast Allows you to transform your gadget into a home theater remote, display travel photos, or play mobile games in maximum detail. Using a wireless Wi-Fi connection eliminates the need for additional adapter cables and preserves the sleek appearance of your interior.
The process of synchronizing devices is based on standards Miracast And Google Cast, which are built into the MIUI or HyperOS shell. Smart TV must also support these protocols, which is true for most models released after 2016. Connection stability directly depends on the quality of the router signal and the correctness of the local network settings, so it is important to follow the sequence of actions.
In this article, we'll take a detailed look at all available screen mirroring methods, from built-in system features to third-party apps. Wireless data transmission Provides high response speeds, but requires careful selection of Wi-Fi frequency. You'll learn how to avoid audio lag and image desync while watching videos.
Technical requirements and equipment preparation
Before you begin setup, you need to make sure your equipment meets the minimum technical requirements. Wireless network must work reliably, and both devices—the smartphone and TV—must be on the same local network. If the router broadcasts signals on 2.4 GHz and 5 GHz frequencies, it is recommended to connect the devices to this range. 5 GHz to ensure maximum channel throughput.
Check the version of the operating system on your XiaomiThe "Cast" feature has been available in MIUI for quite some time, but in newer versions it may be renamed or moved to the "Connections and Sharing" menu. It's also recommended to have the latest firmware on your TV, as manufacturers regularly update security protocols.
⚠️ Note: If your router is configured for AP Isolation mode, devices will not see each other even when connected to the same network. In this case, you must go to your router settings and disable this feature.
Make sure Wi-Fi and Bluetooth are enabled on both devices. Although the video stream is transmitted over Wi-Fi, Bluetooth is often used for initial device discovery and handshake. Energy saving It is better to temporarily disable it on your phone so that the system does not interrupt the data transfer process to save battery power.
Using the built-in "Cast" feature in MIUI
The easiest and most reliable way is to use the shell's native tools. XiaomiThe function is called "Broadcast" and is based on the standard MiracastIt does not require the installation of additional software and operates at the system level, ensuring minimal delays in image output.
To start the process, open the notification shade (swipe down from the top) and find the "Broadcast" icon. If it's not in the quick access, go to Settings → Connections and Sharing → BroadcastThe system will automatically begin searching for available devices on the network. A connection confirmation prompt may appear on the TV screen, which must be accepted using the remote control.
☑️ Check before connection
Once paired successfully, your smartphone's screen will be mirrored to your TV. You can switch between apps, and the image will change in real time.
⚠️ Note: When connecting via Miracast, your phone's screen may dim faster than usual. Increase the display timeout in your display settings to avoid connection interruptions while watching.
Streaming via Google Home (Chromecast built-in)
If your TV is based on Android TV or has built-in support Google CastThe most effective method is to use the Google Home app. This protocol differs from Miracast in that the phone acts only as a remote control, while the TV downloads the video stream directly from the internet, reducing the load on the smartphone.
Download the app Google Home Download it from the Play Market if you don't have it installed. Launch it and find your TV in the list of devices. Click on the device icon and select "Cast my screen." The system will warn you that the entire screen will be cast, and then the mirroring process will begin.
The advantage of this method is that you can use your phone for other tasks without interrupting playback, if the app supports it. However, for full desktop mirroring, the phone must still support an active video stream. Picture quality With this method, the result is often higher, since it is less dependent on the power of the smartphone's processor.
Third-party applications for extended functionality
In cases where built-in tools don't work correctly or the TV is "dumb" (not Smart TV), third-party solutions come to the rescue. Web Video Caster or TvCast Allows you to stream video files from your phone's memory or stream video from your browser directly to your TV, bypassing system restrictions.
To install these apps, go to Google Play and search for "TV Cast" or "Screen Mirroring." Once installed, launch the app and wait for your TV to be detected. Many of these apps have their own server that streams content, which is especially useful for older models. Smart TV, which have poor support for modern codecs.
Some apps allow you to stream not only video but also audio through separate channels, which solves the problem of audio desynchronization. However, it's important to note that free versions often contain ads, and streaming quality may vary depending on network load. Local area network In this case, it experiences increased load due to real-time stream encoding.
Why can third-party applications slow down?
Third-party apps often use software encoding of video streams, which places additional strain on the phone's processor. Unlike native streaming, which uses hardware codecs, third-party software may not be optimized for a specific device model, resulting in dropped FPS and lag.
Comparison of connection methods and their characteristics
The optimal method depends on your goals: gaming, watching movies, or presenting documents. Each method has its own technical characteristics that affect image quality and input lag. Below is a table to help you determine the best option for your situation.
| Parameter | Built-in "Broadcast" (Miracast) | Google Home (Chromecast) | Third-party applications |
|---|---|---|---|
| Latency | Low (ideal for gaming) | Average (depending on network) | High (depending on software) |
| Battery load | High (screen active) | Average (stream comes from the server) | High (video encoding) |
| Picture quality | Depends on Wi-Fi signal | Adaptive (up to 4K) | Often compressed |
| Compatibility | Almost all Smart TVs | Android TV, Chromecast | Any DLNA/Miracast TV |
As the comparison shows, native casting is best for dynamic content. If you plan to watch online videos from a browser that doesn't have built-in Cast support, third-party apps will be an indispensable tool. Transfer protocol data is selected automatically depending on the capabilities of the receiving device.
Diagnosing problems and troubleshooting
A common problem is when the phone doesn't detect the TV. First, check if guest network mode is enabled on the router. Devices connected to guest Wi-Fi are often isolated from the main network where the TV is located. Also, try rebooting the router, as an overflowing ARP address table can block the discovery of new devices.
If the image is transmitted but is choppy or intermittent, it's likely due to insufficient bandwidth. Try lowering the output resolution in the streaming settings or switching your router to a less congested channel. Interference from nearby Wi-Fi networks or microwave ovens can also negatively impact connection stability.
⚠️ Warning: Antivirus software or firewalls on your PC (if you're streaming through one) may block ports required for Miracast. Check your incoming connection rules.
In rare cases, the problem stems from outdated Wi-Fi drivers on the TV. Firmware update Smart TV Using a USB drive may solve the compatibility issue with new versions. AndroidIf all else fails, try using a cable connection or HDMI adapter, as wireless technology is sensitive to external conditions.
What to do if there is sound but no picture?
This is a common symptom of a codec conflict. Try changing the video format in your player or disabling hardware decoding acceleration in the source app's settings.
Optimizing wireless connection quality
For best results, dual-band routers are recommended. Network connection 5 GHz Provides higher data transfer speeds, which is critical for streaming video in Full HD and higher resolutions. However, this frequency has a shorter range, so try to stay close to the router during the session.
Close background apps on your phone that actively use the internet, such as torrents or downloads from the Play Store. This will free up bandwidth for the video stream. It's also a good idea to disable your VPN on your smartphone, as traffic encryption puts additional strain on the processor and can cause desynchronization.
Regularly clearing the DNS cache on your router and phone helps maintain a stable connection. If you're using a static IP address, make sure it doesn't conflict with your TV's address. Network stability — a key factor in comfortable use of wireless broadcasting.
Why is the broadcast delayed?
Lag occurs due to the time it takes to encode the video signal on the phone, transmit it over Wi-Fi, decode it on the TV, and output it to the display. Using the 5 GHz frequency and closing background tasks helps minimize this process.
Is it possible to stream audio only to a TV?
Yes, you can select the audio output device in the Bluetooth settings or the "Cast" menu. However, when using full screen mirroring, the audio is usually automatically mirrored to external speakers.
Does broadcasting affect internet speed?
When using Google Cast, traffic goes directly from the video server to the TV, without loading the phone's network. When using Miracast (built-in streaming), the internet may not be used at all if the content is played locally, or it may load the network if the video is online.