A modern TV often serves as a simple monitor for watching cable channels, although its potential is much broader. You can enjoy movies and TV series from the internet on a large screen with high-quality sound, directly from your personal computer. There's no need to run long HDMI cables across the room or move your laptop to the couch.
Wireless technologies allow you to instantly transfer content while maintaining the aesthetics of your home and freedom of movement. There are several proven methods for establishing a connection, each with its own characteristics and hardware requirements. The choice of a specific method depends on your PC's operating system, version, and configuration. Smart TV and the type of content being transmitted.
In this article, we'll take a detailed look at all the current methods for synchronizing devices on the same network. You'll learn how to use built-in Windows features, third-party apps, and proprietary technologies to achieve the best results.
Basic technologies for wireless video transmission
Before setting up, it's important to understand the basic principles of wireless protocols. Different standards provide different image quality, latency, and device compatibility. Understanding these differences will help you choose the optimal use case for your situation.
The most common standard is DLNA (Digital Living Network Alliance). This technology allows for the transfer of media files (video, photos, music) between devices on a local network. The computer acts as a server, and the TV acts as a renderer, or playback device. The main advantage of DLNA is that playback controls (pause, rewind) are handled on the TV, leaving the computer free for other tasks.
The second popular method is MiracastUnlike DLNA, this protocol is designed for screen mirroring. The TV displays an exact copy of what's happening on the computer monitor in real time. This is ideal for presentations or web page sharing, but may be less convenient for watching movies, as the PC screen must remain active.
There are also proprietary solutions such as Google Chromecast And Apple AirPlayThey are often built into modern TVs or require external dongles. These technologies provide stable streaming and convenient control from a smartphone or tablet, but may have limitations when used with Windows PCs.
- 📺 DLNA — ideal for watching downloaded movies without putting a strain on your PC.
- 🖥️ Miracast - the best choice for desktop duplication and games.
- 🌐 Chromecast built-in — convenient for streaming from browsers and applications.
- 🍏 AirPlay 2 — the standard for owners of Apple technology and compatible TVs.
⚠️ Attention: For all of these technologies to work, it's critical that both your computer and TV are connected to the same Wi-Fi network. If your router broadcasts 2.4 GHz and 5 GHz networks with different names, make sure both devices are on the same segment.
The choice of protocol is often dictated not by preference, but by hardware capabilities. Older TV models may not support Miracast, and some budget routers won't handle 4K video streaming via DLNA due to low bandwidth.
Preparing your home network for stable broadcasting
The quality of wireless data transmission directly depends on the condition of your local network. High-resolution video, especially 4K or HDR, requires a stable bandwidth. If the network is congested or the signal is weak, you will experience buffering, image artifacts, or complete connection drops.
The first step is to check the Wi-Fi frequency range. 2.4 GHz has a longer range, but it is heavily interfered with by neighboring networks and household appliances. For video transmission, it is highly recommended to use the 5 GHzIt provides higher speeds and less interference, which is critical for streaming video.
Pay attention to the router's position. If there are load-bearing walls, metal structures, or mirrors between the access point and the TV, the signal may weaken. In such cases, even a powerful PC won't be able to transmit the stream without loss. Consider using a Wi-Fi repeater or mesh system to improve coverage.
⚠️ Attention: Router and TV interfaces are constantly being updated. The location of frequency band or security protocol settings may differ from those described. Always consult the official documentation from your equipment manufacturer if you cannot find the menu item you need.
It's also worth checking your network security settings. Some older encryption protocols can limit data transfer speeds. Make sure your router is running a modern standard. WPA2 or WPA3Using an open network or outdated WEP can not only reduce speed but also compromise the security of your data.
Broadcasting via built-in Windows tools (Projection)
Windows 10 and 11 operating systems have a built-in wireless display feature based on the Miracast standard. This is the fastest way to display content from a laptop or PC on a TV screen without installing additional software. This method works as full screen mirroring.
First, make sure that the signal reception function is enabled on your TV. In the menu Smart TV This may be called "Screen Mirroring," "Screen Casting," "Mirror Share," or simply "Wireless Display." Once this feature is activated, the TV will enter connection standby mode.
On your computer, press the key combination Win + KThe "Connection" sidebar will appear on the right. The system will begin searching for available devices. When your TV appears in the list, click it to pair it. A connection confirmation prompt may appear on the TV screen, which you'll need to accept using the remote.
☑️ Check before connection
Once the connection is successful, the image from the PC monitor will appear on the TV. You can change the projector mode by pressing again. Win + PThe options available are: "Duplicate" (same image), "Extend" (TV as a second monitor), or "Second screen only" (PC monitor will go dark).
It's worth noting that using Miracast places a strain on the GPU and Wi-Fi adapter. This can lead to the laptop heating up. Furthermore, for fast-paced games, this method can introduce noticeable input lag, making it unsuitable for competitive shooters, but perfectly suitable for strategy games or photo viewing.
Using DLNA to play media files
If you simply want to watch a movie stored on your computer's hard drive, DLNA is the most efficient method. It doesn't require a constantly active window on your PC and allows you to control playback with your TV remote, which is much more convenient.
In Windows 10 and 11, the media server feature is often enabled by default, but requires proper folder configuration. Open Settings (the gear icon in the Start menu), go to Network & Internet, then select Status and click Sharing Options. Turn on network discovery and file sharing.
Next, you need to add video folders to the media player library. Open "Media Streaming Settings" using Windows Search. Make sure streaming is enabled and your TV is listed as an allowed device. Then, add movie folders to the "Videos" library using the folder's context menu or Properties.
| Parameter | Recommended value | Impact on broadcast |
|---|---|---|
| Protocol | DLNA / UPnP | Provides device discovery |
| Net | Private | Allows the PC to be visible on the network |
| Video codec | H.264 / MP4 | Maximum compatibility with TV |
| Permission | Up to 4K (depending on TV) | Determines the clarity of the image |
On your TV, open the "Media," "Gallery," or "Video Player" app. Select your computer from the list of sources. You'll see the folder structure and be able to play any file. The TV decodes the video itself, so the load on your PC is minimal.
However, DLNA has a limitation: the TV must support the file format. If you try to play a video with a rare codec or complex subtitle format, the TV may display a playback error. In such cases, it's better to use screen projection or third-party software.
Third-party programs for advanced features
Windows' built-in features are great, but sometimes their functionality isn't enough. Third-party apps allow you to stream browser tabs, use your TV as a second monitor with low latency, or stream DRM-protected content that's blocked by standard methods.
One of the most popular programs is LetsView or AirServerThey allow you to set up a wireless connection similar to Miracast or AirPlay with advanced quality settings. It's also worth mentioning Plex — is a powerful media server that not only streams files, but also downloads metadata (posters, descriptions), creating a beautiful interface on the TV.
For browser users Google Chrome The built-in Cast feature is available. Click the three dots in the upper right corner and select "Cast." You can cast an entire tab or your entire desktop. This is a convenient way to show a presentation or video from a website that isn't directly supported by a Smart TV.
Why does video lag when streaming through a browser?
Casting a Chrome tab requires significant CPU resources, as the browser must render the page, capture the image, encode it, and transmit it over the network simultaneously. If you have a weak processor, you may experience lag.
When using third-party software, it's important to keep track of your Wi-Fi adapter's driver version. Outdated software may not work correctly with new video compression protocols, leading to audio and video desynchronization. Update your drivers regularly from the laptop or network card manufacturer's website.
Solution and troubleshooting
Even with a perfect setup, problems can arise. The most common is that the computer doesn't see the TV, or vice versa. In 90% of cases, this can be resolved by rebooting the router. Routers running continuously for 24 hours can overflow their memory buffer or lose routing tables for multicast packets used by DLNA.
If you see an image but the sound comes through your computer speakers, check your playback device settings. Click the speaker icon in the Windows tray, select the output device, and select your TV or "Digital Device (HDMI)." This will redirect the audio stream over the network.
If you see blocky or pixelated images, the problem is likely a poor Wi-Fi signal. Try moving closer to the router or reducing the video quality in your player settings. Background downloads on other devices (game updates, torrent downloads) can also choke the stream.
⚠️ Attention: When using public or corporate Wi-Fi networks, broadcasting is often impossible due to client isolation. On such networks, devices are prohibited from communicating directly with each other.
In some cases, resetting network settings helps. Open the command prompt as administrator (press Win + X and select the desired item) and enter the command netsh winsock reset, then restart your computer. This will clear the network protocol cache.
Comparison of methods and final recommendations
Each of the methods discussed has its own niche application. There's no universal solution that works perfectly in all scenarios. The choice depends on what you want to do: watch movies, play games, or work with documents on a big screen.
For watching movies and TV series stored on a PC, the undisputed leader remains DLNA or specialized servers like PlexThey provide the best picture quality and convenient control.
Best suited for displaying photos, presentations or web pages Miracast (Windows' Projection feature). It's fast and doesn't require any folder setup.
- 🏆 Best quality: DLNA / Plex (native TV decoding).
- 🚀 Connection speed: Miracast / Projection.
- 🌍 Versatility: Google Chrome Cast (works anywhere you have a browser).
- 🍎 For the Apple ecosystem: AirPlay 2.
Keep in mind that technology is constantly evolving, and TV manufacturers may change interfaces or add new features through firmware updates. If a method stops working after a system update, check your privacy and firewall settings—they may have been reset to more restrictive defaults.
☑️ Final check
Why can't the TV see the computer on the network?
Most often, the issue is with the network type. In Windows, the network should be marked as "Private" and not "Public." On public networks, Windows blocks device discovery for security reasons. Also, check if the "UPnP Device Host" service is enabled in the Windows services list (click Win + R, enter services.msc).
Is it possible to broadcast audio separately, without video?
Yes, this is possible. When connecting via "Projection" (Miracast), select "Second Screen Only" mode or simply output audio to the "Digital Audio (S/PDIF or HDMI)" device in Windows Sound settings. The video may not appear on the TV or will be black, but the audio will come through the TV's speakers.
There's a delay in sound when watching videos over WiFi. What should I do?
Audio desync is a common issue with wireless streaming. Try manually adding audio delay in a PC player (such as VLC) (press the [keys] K or J). If this doesn't help, Miracast may be unstable for your network; try switching to DLNA, where the TV handles synchronization itself.
Do you need internet to stream from PC to TV?
No, internet access is not required. Both devices need to be connected to the same router, even if the router doesn't have internet access. A local area network (LAN/WLAN) works regardless of internet access. However, streaming from online movie theaters (YouTube, Netflix) through a browser requires internet access, of course.