Modern technologies allow you to transform any TV with the function Smart TV into a multimedia center for the entire home. No more searching for HDMI cables or transferring files to a flash drive to watch a movie shot on your phone or a presentation from your laptop. Wireless data transfer over a local network has become a standard, accessible to every user, regardless of technical proficiency.
There are several basic protocols and methods for streaming video and audio. The specific method you choose depends on your device's operating system, TV model, and the type of content being streamed. In this article, we'll cover all the current options, from built-in Windows and Android features to specialized apps.
The key requirement for stable operation of any streaming technology is a high-quality wireless connection. If the router and TV are in different rooms due to thick walls, picture quality may suffer. To stream 4K video without buffering, we recommend using routers that support the 5 GHz standard. Make sure all devices are on the same subnet, otherwise they simply won't "see" each other.
Using Miracast and Wi-Fi Direct technology
One of the most popular methods is technology Miracast, which allows you to mirror the screen of a mobile device or computer to a TV without a router, using a direct Wi-Fi Direct connection. This method is built into most modern Android smartphones and Windows laptops. The TV acts as a receiver, creating an access point to which the signal source connects.
To activate the feature on a TV, you often need to select the appropriate signal source from the menu or launch an app with a name like "Screen Mirroring," "Cast," or "Smart View." On a Windows 10 or 11 computer, simply press a key combination. Win + Kto open the wireless display connection panel. The system will automatically begin searching for available devices within range.
Image quality via Miracast can vary. If you're simply planning to share photos or a presentation, there won't be any noticeable delays. However, during fast-paced scenes in movies, audio and video may become out of sync. This is because the video stream is encoded and decoded in real time.
It's worth noting that some manufacturers use their own implementations of this technology. For example, Samsung calls it Smart View, while LG calls it Screen Share. The operating principle remains similar, but the menu names may differ. Always check the instructions for your specific model. Smart TV.
⚠️ Attention: When using Wi-Fi Direct, the Internet on the broadcasting device (smartphone) may temporarily be disconnected, as the Wi-Fi module switches to a direct connection with the TV.
Broadcast via DLNA and media servers
Protocol DLNA (Digital Living Network Alliance) is a classic standard for sharing media over a home network. Unlike Miracast, it doesn't mirror the screen, but rather transmits the media file itself. The TV reads the file from the source device (PC, NAS, phone) and plays it natively using its built-in decoder.
To implement this method, you need to enable media streaming on your computer. In Windows, this is done through "Media Streaming Settings" in Control Panel. Once turned on, the PC becomes visible to the TV as an external storage device containing content.
On Android and iOS smartphones, creating a DLNA server often requires third-party apps like BubbleUPnP or VLC for Mobile. These apps scan the device's memory and make video files available for playback on other devices on the network.
- 📺 Open the Media or Gallery app on your TV.
- 📂 Select your computer or smartphone from the list of available devices.
- ▶️ Find the desired file in the "Video" folder and start playback.
The advantage of DLNA is that playback control (pause, rewind) is often possible with the TV remote. Furthermore, image quality isn't compromised by real-time compression, as with screen mirroring. However, the file navigation interface on the TV can be cumbersome for large libraries.
AirPlay feature for Apple users
Apple device owners enjoy an ecosystem where video transmission is implemented as conveniently as possible through the protocol AirPlayModern TVs from many brands (Samsung, LG, Sony, Vizio) have built-in AirPlay 2 support, eliminating the need for an Apple TV set-top box.
To share a video, simply open the file in the Photos app or video player on your iPhone/iPad, tap the Share button, and select Screen Mirroring or the AirPlay icon. If the devices are on the same Wi-Fi network, the TV will appear in the list of available networks.
A key advantage is AirPlay audio support, even without video. You can play music on your iPhone, and it will play through your TV's speakers. This feature often requires entering a four-digit code displayed on the TV screen, which protects against unauthorized connections.
⚠️ Attention: Make sure AirPlay is enabled on your TV in the network or general settings. On some models, it's disabled by default for privacy reasons.
The stability of an AirPlay connection directly depends on the quality of your router. The protocol is sensitive to interference, so for viewing high-definition video (HDR, 4K), it's recommended to use routers that support the standard. Wi-Fi 5 (AC) or newer.
Streaming apps from TV manufacturers
Major TV manufacturers are developing their own mobile apps that significantly expand user experience. These programs are often more stable than standard system tools and offer a user-friendly interface for content management.
For example, there is an application for Samsung TVs SmartThings, for LG - LG ThinQ, and for Sony - Video & TV SideViewAfter installing the app on your smartphone and pairing it with your TV (usually by scanning a QR code or using automatic search), you gain full access to your phone's file system directly on the TV screen.
These apps often allow you to not only stream video, but also use your phone as a remote control, display notifications, or even stream browser tabs. Some of them support the format Cast, similar to Chromecast, allowing you to send content from compatible apps (YouTube, Netflix) with one click.
☑️ Check before connection
If standard methods don't work, using a proprietary app is the best way to resolve file format compatibility issues. Built-in app players often have a wider range of codecs than the TV's native tools.
Google Chrome browser and Chromecast
Technology Google Cast Chromecast built-in is built into many modern TVs and allows you to cast browser tabs or the entire computer screen. This is especially convenient if the content is on a website that doesn't have a native app on the TV.
To start casting, open the Google Chrome browser on your PC, click the three dots in the upper-right corner, and select "Cast." You can choose to cast a specific tab, the entire desktop, or an audio tab. The TV will act as a remote monitor.
Chrome menu: Settings → Cast → Select deviceThis method is convenient because it doesn't require complex network settings. All that's required is for the browser and TV to be able to see each other on the local network. However, mirroring the entire screen can put a lot of strain on the computer's processor, leading to overheating of the laptop.
- 💻 Open Chrome and click the menu (three dots).
- 📡 Select the “Cast” option.
- 🖥️ In the source list, select "Full screen" or "Tab".
- 📺 Click on the name of your TV.
What should I do if my browser can't see my TV?
Make sure your antivirus or firewall isn't blocking your local network. Try temporarily disabling network protection or adding an exception for Chrome. Also, check that AP Isolation isn't enabled in your router settings.
Comparison of video transmission methods
The best method depends on your needs. If you need to share a presentation with colleagues, Miracast is suitable. For watching a downloaded movie in high quality, DLNA is best. And for quickly sharing a web page, Chrome Cast is ideal.
The table below provides a comparison of the main characteristics of the various methods to help you navigate them.
| Method | Quality | Delay | PC addiction |
|---|---|---|---|
| Miracast | High | Average | Depends (screen active) |
| DLNA | Maximum | No | Doesn't depend on (file system) |
| AirPlay | High | Low | Depends |
| Chrome Cast | Average | High | Depends (tab is active) |
Please note that for methods that rely on a PC or smartphone (Miracast, Cast), the source device must remain on and not go into deep sleep. Otherwise, the stream will be interrupted.
Solution and connection problems
Even with proper configuration, errors can still occur. The most common issue is devices not seeing each other. In 90% of cases, this is due to them being connected to different router frequencies (2.4 GHz and 5 GHz) with isolation enabled, or to a guest Wi-Fi network.
Another common cause is outdated software. Manufacturers regularly release updates that improve protocol compatibility. Check your TV's firmware version in the menu. Support → Software Update.
⚠️ Attention: Menu interfaces and item names may vary depending on your TV's operating system version (Tizen, WebOS, Android TV). Please consult the manufacturer's current documentation.
If the video is lagging or breaking up into blocks, try lowering the file's bitrate or switching your router to a less congested channel. In apartment buildings, the airwaves are often overcrowded, which negatively impacts Wi-Fi throughput.
FAQ: Frequently Asked Questions
Why can't the TV see my laptop via Wi-Fi?
Most likely, the devices are connected to different networks or frequencies. Check that both the PC and TV are connected to the same router SSID. Also, make sure your Windows network settings are set to "Private" and not "Public," as device discovery is blocked in the public profile.
Is it possible to stream video from iPhone to Android TV?
Yes, it's possible. Many modern Android TVs have built-in AirPlay 2 support. If your model doesn't, install an AirPlay receiver app from the Google Play store (such as AirScreen) on your TV, which emulates the Apple protocol.
How to improve picture quality during broadcasting?
For the best quality, use a wired connection from your PC to your router via Ethernet and connect your TV via 5 GHz Wi-Fi. Avoid casting your entire screen to watch videos; instead, use the "Cast File" feature or DLNA to let your TV cast the video itself.
Do you need internet to stream video via Wi-Fi?
No, internet access is not required. For Miracast, DLNA, and AirPlay to work, all devices need to be connected to the same router (local network), even if the router doesn't have access to the external network.