Modern leisure is unthinkable without multimedia content, which you want to view on a large screen, and not on a small laptop monitor. Wi-Fi router As a bridge between your computer and TV, it eliminates unnecessary cables and provides high device mobility. This solution is especially useful when the HDMI cable is too short or simply unavailable.
Wireless video transmission allows you to control content directly from your keyboard and mouse, making it much more convenient than using a remote control. However, to avoid lag and artifacts, you need to properly configure your local network. In this article, we'll cover all available device synchronization methods in detail and troubleshoot common connection issues.
The key to successful streaming is a stable connection between your devices. If your router is operating in a congested band or has an outdated standard, image quality may suffer. Therefore, before beginning setup, make sure both devices are within range of a strong signal.
Local network and hardware requirements
For high-quality video streaming without jerking or buffering, it's critical that both the computer and TV are connected to the same local network. This means they must be able to "see" each other through the same routerIf you have a dual-band router that operates on both 2.4 GHz and 5 GHz frequencies, it's best to connect both devices to the 5 GHz network to ensure maximum throughput.
Wireless connection speed directly impacts the resolution of the streamed image. For Full HD content, the 802.11n standard is sufficient, but for 4K video, routers that support the standard are recommended. Wi-Fi 6 (802.11ax)A weak signal can cause audio and video to become out of sync, completely ruining the viewing experience.
⚠️ Attention: If your router automatically switches devices between 2.4 and 5 GHz frequencies (Smart Connect), this may cause connection drops when transmitting heavy video streams. We recommend manually assigning static IP addresses or separating networks into different SSIDs to ensure stable media server operation.
It's also worth considering the age of your TV. Older Smart TV models may not support modern codecs or encryption protocols used by newer Windows or macOS operating systems. In such cases, the software on your computer may not recognize the target device for streaming.
Miracast technology and built-in Windows features
The easiest way to stream your screen in real time without installing any additional software is to use technology MiracastIn Windows 10 and 11, this feature is built-in and can be activated through the notification center. The TV must also support Wi-Fi Direct or have built-in Screen Mirroring.
To get started, open the Start menu and go to System Settings. Find the section responsible for projection, or simply use the hotkeys. After scanning available devices, your TV's name will appear in the list.
Win + KPressing this key combination will open the "Connect" sidebar, where Windows will search for displays. If your TV isn't found, check its settings: on many Samsung, LG, and Sony models, you need to manually launch the "Screen Casting" or "Screen Share" app in the Smart TV menu before searching from your PC.
Image quality when using Miracast depends on the strength of the TV's Wi-Fi module. Image compression is often observed, which can cause text on the screen to appear blurry. This method is ideal for presenting presentations or viewing photos, but the frame rate may be insufficient for fast-paced games.
Why might my mouse cursor lag?
Cursor lag when using Miracast is due to double encoding of the video stream. The computer compresses the image, sends it over the network, and the TV decodes it and displays it on the display. This process takes time, and with a weak signal, lag can reach 100-200 ms, making playing shooters impossible.
Setting up a DLNA media server to stream files
If your goal is not to duplicate your desktop, but to play video files stored on your hard drive, the optimal solution is the technology DLNAIt allows the TV to access computer folders as network resources. Windows has a built-in media server, which is easily activated through standard system tools.
To set this up, go to the Control Panel and find "Streaming Media Settings." Here, you'll need to allow access for your TV. The system will automatically detect the device on the network and prompt you to add it to the list of allowed devices.
- 📁 Open "Streaming Media Settings" via Windows Search.
- ✅ Click the "Enable media streaming" button if it is disabled.
- 📺 Find your TV in the list and make sure it is marked "Allowed".
- 📂 Add video folders to your "Videos" or "Movies" library to make them visible on TV.
After setup, your computer will appear in the TV's Input menu or media player app. You'll be able to navigate folders and launch files directly using the remote. In this case, the computer simply serves as a data storage device and isn't responsible for video decoding.
It's important to understand that DLNA doesn't allow for as flexible playback control from a computer as a direct connection. You won't be able to pause a video from your PC keyboard unless you use specialized software. However, for viewing family photos or movies, this is the most stable method.
Using Third-Party Media Servers: Plex and Kodi
Windows' built-in tools often struggle to recognize the complex audio and video codecs supported by modern TVs. In such cases, powerful media servers, such as Plex or KodiThey don't just transmit the file; they can also transcode the stream on the fly if the TV can't read the original format.
Installing a Plex server on your computer turns it into a fully-fledged media center with a beautiful interface, movie posters, and descriptions. Your TV only needs to install the Plex client app from the Smart TV app store. Communication between them is accomplished exclusively through the Wi-Fi router.
| Function | Windows Media Player | Plex Server | Kodi |
|---|---|---|---|
| Interface | Standard file list | A beautiful library with posters | Customizable skins |
| Transcoding | No | Yes (automatically) | Configuration required |
| Access from outside | Locally only | Yes (via Plex cloud) | Locally only |
| Complexity | Low | Average | High |
The main advantage of using specialized software is support for subtitles and complex audio tracks that the TV's built-in player might ignore. The server handles this work for you, ensuring compatibility with any screen.
When the server first starts, it will take time to scan the library and download metadata from the internet. This can put a strain on your Wi-Fi connection, so it's best to perform the initial setup when no one is actively using the network to download large amounts of data.
☑️ Check before launching the media server
Broadcasting via Google Chrome browser
The universal solution for owners of TVs with Chromecast support (built-in or via a set-top box) is a browser Google ChromeThis method allows you to broadcast both individual tabs and the entire screen, regardless of the computer's operating system.
To start casting, click the three dots in the upper-right corner of the browser and select "Cast." The browser will scan the network and suggest available devices. This method is especially convenient for showing websites, YouTube, or Google Docs directly from your TV.
⚠️ Attention: When casting an entire browser tab, audio may be delayed. To watch YouTube videos, use the built-in "Cast" button directly in the website's video player. This will ensure better synchronization and quality, as your TV will stream directly from YouTube's servers, not through your PC.
If you select the "Cast Desktop" option, you'll get a full mirroring of the image. This is useful for showing content from programs that aren't running in a browser. However, it's important to remember that this puts a strain on your computer's processor, which must encode the image in real time.
You can change the streaming image resolution in the "Device" tab settings. You can choose optimization for text (for documents) or for video and games, which will change the stream encoding priorities.
Diagnosing problems and improving signal quality
Even with proper setup, users may experience signal interruptions. Most often, the problem stems from interference from neighboring networks or physical obstacles. A router placed in a niche or behind a metal object significantly reduces data transmission efficiency.
To check the connection quality, you can use Wi-Fi analysis tools available as smartphone apps. They will show the signal strength (RSSI) at the TV's location. If the level is below -70 dBm, stable high-definition video streaming will be difficult.
- 📶 Try switching your router to a less congested channel in your wireless network settings.
- 📡 Raise the router antennas vertically or point them perpendicular to each other for better polarization.
- 🚫 Move microwave ovens and baby monitors that operate at 2.4 GHz away from your router and TV.
It's also worth checking whether power saving is enabled on your computer's network card. In Device Manager, under the Wi-Fi adapter properties, on the "Power Management" tab, uncheck the box to allow the device to be turned off. This will prevent short-term connection interruptions when the system switches to power-saving mode.
Why can't the TV see the computer on the network?
Most often, the issue is with the network type. In Windows, the network may have been identified as "Public" when you first connected, which prevents devices from being discovered. Go to the network settings and change the profile to "Private." Also, make sure "Turn on network discovery" and "Turn on file sharing" are enabled in the network discovery settings.
Is it possible to transmit sound to external speakers via Wi-Fi?
Yes, when using Miracast or Chromecast, audio is transmitted along with video. In Windows sound settings (Start → Settings → System → Sound), under "Output," select your TV or wireless device. However, for Hi-Fi audio, it's best to use a wired connection or Bluetooth, as Wi-Fi can introduce compression distortion.
Does torrenting affect streaming quality?
Absolutely. Actively downloading or distributing files via torrents clogs up the Wi-Fi channel and the router's processor. This leads to video buffering and choppy images. Before viewing heavy content, it's recommended to limit the speed of your torrent client or pause downloads.