Modern technology allows you to completely eliminate unnecessary wires, turning your living room into a true multimedia center. Instead of huddling in front of a small laptop monitor, you can stream movies, photos, and presentations to a large TV screen using only your home wireless network. This is convenient when you want to share vacation photos with family or stream a high-definition movie from an online cinema.
The process of setting up a connection depends on the operating system of your computer and the platform it is running on. Smart TVThere are universal standards, such as DLNA and Miracast, as well as proprietary solutions from Google and Apple. Understanding how these protocols work will help you avoid common connection errors.
In this article, we'll explore all the current methods for transmitting video signals over the air. You'll learn how to set up screen projection, how to turn your TV into an external monitor, and the nuances of working with different browsers and media players.
⚠️ Note: Menu interfaces may differ on TVs from different manufacturers (Samsung, LG, Sony, Xiaomi). Item names may vary, but the general principles remain the same.
Network and hardware requirements
For stable wireless streaming, the speed and stability of the local network are critical. Both devices—the computer and the TV—must be connected to the same access point. This means that if the router broadcasts networks on 2.4 GHz and 5 GHz frequencies, it's desirable for both devices to operate on the same band, preferably 5 GHz, as it provides higher throughput.
Wi-Fi signal strength also plays a role. If the router is located in another room behind thick walls, image quality may degrade, and compression artifacts or audio lag may occur. Ideally, the distance between the access point and the receiving device should not exceed 10-15 meters in an apartment.
- 📡 A stable router with standard support 802.11ac (Wi-Fi 5) or newer.
- 💻 A computer with a working Wi-Fi module or Ethernet connection to the same network.
- 📺 TV with Smart TV technology support (WebOS, Tizen, Android TV).
- 🔌 No active VPN connections that could block local traffic.
Check if your TV's software is up to date. Manufacturers frequently release patches that improve compatibility with new versions of Windows and macOS. Go to Settings → Support → Software Update and run the scan.
⚠️ Note: If you're using a guest Wi-Fi network or a corporate network with AP Isolation, devices won't be able to see each other. In this case, broadcasting is impossible until you change your router settings.
Broadcasting via built-in Windows tools (Miracast)
Windows 10 and 11 operating systems have powerful built-in tools for wireless display. Technology Miracast Allows you to duplicate your screen or extend your desktop without installing additional software. It works similarly to connecting an HDMI cable, except the signal is transmitted over the air.
To get started, make sure the signal reception feature is enabled on your TV. On Samsung devices, it may be called "Screen Mirroring," on LG devices, "Screen Share," and on Android TV, "Wireless Monitor." Once the TV is in standby mode, proceed to your computer settings.
Press the key combination Win + K on your keyboard. The "Connection" panel will open on the right. The system will begin searching for available devices within range. Select your TV from the list.
☑️ Windows connection algorithm
After successful pairing, you can control the display mode through the menu System → DisplayThe available options are: "Duplicate" (same image), "Extend" (second desktop), or "Second screen only" (the PC monitor goes dark and only the TV works).
It's important to note that when using Miracast, you may experience a slight lag in the mouse cursor. This is normal for this technology, so playing fast-paced shooters this way may be uncomfortable, but for watching videos or working with documents, the lag is not critical.
Using DLNA technology for media files
If your goal is not to duplicate the desktop, but to play specific video files, photos or music stored on your hard drive, it is better to use the protocol DLNAIt creates a media server on the computer, which the TV accesses as a network storage device.
In Windows, this feature is built into the system. Open "Streaming Media Settings" through the Control Panel or search. Here you need to allow access for your TV. After that, in the TV's signal sources menu (the button) Input or Source) a new item will appear, for example, "PC" or the name of your computer.
| Parameter | Description | Recommendation |
|---|---|---|
| Video formats | MP4, MKV, AVI | Use MP4 for better compatibility |
| Codec | H.264, H.265 (HEVC) | H.264 is supported by all TVs |
| Sound | AC3, AAC, PCM | Check AC3 support on older TVs |
| Subtitles | SRT, ASS | The subtitle file name must match |
For more advanced file library management, it is worth installing a third-party media server, for example, Universal Media Server or PlexThese programs automatically download movie covers, descriptions, and sort content by genre, turning your TV interface into a beautiful catalog.
When playing large files (4K HDR with high bitrates) via DLNA, buffering may also occur if your Wi-Fi speed is unstable. In this case, try reducing the stream quality in your player settings or moving your router closer.
What should I do if the TV doesn't see the folders?
Make sure your computer's network settings are set to "Private" and not "Public." Windows blocks device discovery when using a public profile.
Broadcasting via Google Chrome browser
Browser Google Chrome has a built-in Cast function, which allows you to cast not only browser tabs but also the entire screen or individual files to your TV. This method is especially convenient if you have an Android TV or a built-in Chromecast module.
Open your PC browser and click the three dots in the upper right corner. From the menu, select "Save & Share" → "Cast..." (or just "Cast"). A device search window will open.
By default, the browser will offer to cast the current tab. However, by clicking the "Sources" button, you can select "Cast Screen" to display the entire desktop or "Cast File" to open a video from your hard drive directly in the TV player.
The advantage of this method is its cross-platform compatibility: it works equally well on Windows, macOS, and Linux. Furthermore, Chrome is often better at transcoding videos on the fly if the file format isn't natively supported by the TV.
⚠️ Note: When casting a browser tab, audio may not be transmitted automatically. Make sure "Broadcast audio" is enabled in the tab settings (the three dots on the tab preview).
Connecting Apple macOS computers and AirPlay
Apple owners are lucky with the ecosystem. Technology AirPlay 2 Built into many modern TVs (Samsung, Sony, LG, Vizio), this allows you to display images from your Mac or iPhone on the big screen with minimal latency and high quality.
On your Mac, open Control Center from the menu bar (the icon with two switches) and select "Screen Mirroring." Your TV will appear in the list. For AirPlay to work, the corresponding service must be enabled on your TV. This is usually found under "General" → "Apple AirPlay Preferences."
The system may request a confirmation code, which will appear on the TV screen. Enter it on your computer. Once connected, you can use the TV as a second monitor, arranging windows conveniently for working or viewing.
If your TV doesn't support AirPlay natively, you can install an emulator app, for example, AirServer or Reflector on a PC, but for a Mac-TV connection, the built-in tools are usually sufficient. Also note that AirPlay requires a more stable connection than Miracast.
Troubleshooting and eliminating delays
Even with proper setup, technical difficulties can still arise. The most common issue is audio and video desynchronization or intermittent image flickering. This almost always indicates insufficient Wi-Fi bandwidth.
Try disabling other devices that actively consume data (torrents, game downloads, phone streams). If the problem persists, it might be worth switching to the 5 GHz band, which is less congested by neighboring networks.
- 🔄 Restart your router and TV (unplug them completely for 10 seconds).
- 📶 Move closer to the router or use a Wi-Fi repeater.
- 🛡️ Check if your antivirus or firewall is blocking your local connection.
- 📺 Reduce the resolution of the displayed image in Windows display settings.
Sometimes resetting your PC's network settings can help. Open a command prompt as administrator and enter the TCP/IP stack reset command:
netsh int ip resetAfter executing the command, you must restart your computer. Also, make sure your PC's wireless adapter drivers are updated to the latest version from the manufacturer's website.
Comparison of connection methods
The choice of method depends on your needs. For gaming and work, Miracast or AirPlay are best, as they provide minimal input lag. For watching movies from a local folder, DLNA is ideal, as it reduces the load on the PC's processor. For web content, Chrome Cast is convenient.
Don't forget about specialized manufacturer apps. Samsung has "Smart View," and LG has "TV Plus," which can offer additional functionality, such as controlling the TV remote from a PC keyboard.
The table below provides a comparison of the main characteristics of the methods:
| Method | Delay | Quality | Complexity |
|---|---|---|---|
| Miracast | Low | High | Low |
| DLNA | No | Maximum | Average |
| Chrome Cast | Average | High | Low |
| AirPlay | Low | High | Low |
Experiment with different methods to find the best one for your hardware setup. Modern Smart TVs often support all of these protocols simultaneously.
Frequently Asked Questions (FAQ)
Is it possible to display an image if the TV is not Smart TV?
Yes, you'll need an external set-top box, such as a Google Chromecast, Apple TV, or Android box. These devices connect to the HDMI port and add Smart features to your TV, allowing you to stream content from your PC.
Why is there no sound when streaming via Wi-Fi?
Check your audio output device in Windows. Click the speaker icon in the system tray and select your TV instead of your computer speakers. In some applications (browser, media player), sound settings need to be adjusted within the application itself.
Does screencasting affect internet speed?
When using Miracast or AirPlay, traffic flows within the local network and doesn't consume internet bandwidth. However, if you stream online videos (YouTube, Netflix) from your PC to your TV, your data plan will use up your bandwidth.
How to improve the image quality if it is blurry?
Make sure your PC's resolution is set to the native resolution of your TV (usually 1920x1080 or 3840x2160). Also, check the scaling settings in your TV's menu (like "Just Scan," "Screen Fit," or "Fit to Screen") to remove any unnecessary margins.
Is it safe to leave media files publicly accessible?
On a home network with a secure Wi-Fi password, yes. However, in public places (cafes, hotels), enabling DLNA file sharing is not recommended, as other network users could theoretically access your folders.