Modern multimedia content demands high-quality images and a large screen, but often a video file is stored on a computer but viewed on a widescreen display. Wired HDMI connections have long ceased to be the only solution, giving way to wireless technologies that provide high data transfer rates. Streaming video over WiFi has become the standard for most users, allowing them to get rid of unnecessary cables and move freely around the room.
There are several proven methods for accomplishing this task, each with its own peculiarities and hardware requirements. Some methods are built directly into the Windows operating system, while others require additional software or built-in browser features. It's important to understand the difference between simple file streaming and full screen mirroring, as these processes use different protocols.
In this article, we'll cover all current connection options in detail, from standard Miracast to DLNA server setup, so you can choose the best one for your setup. Regardless of your operating system or TV model, you'll find a solution that will let you enjoy content on the big screen without lag or loss of quality.
Basic technologies for wireless video transmission
Before setting up, it's important to understand the terminology, as manufacturers often use different names for the same technologies. Fundamentally, there are three main protocols that enable communication between a computer and a TV on a local network. Understanding the differences between them will help avoid confusion when searching for the desired function in the device menu.
The first and most common standard is Miracast, which allows you to broadcast the entire screen image, including the mouse cursor and open windows. The second popular method is DLNA, which is designed exclusively for transferring multimedia files (video, audio, photos) from a computer to a TV, where the TV acts as a renderer. The third option is to use technology Chromecast or similar Android TV-based solutions that allow you to "send" browser tabs or app content.
⚠️ Important: For most wireless methods to work, it's critical that both devices are on the same subnet. If your router is sharing a guest network or using client isolation mode, streaming will not work.
The choice of technology depends on your goals: if you need to show a presentation or play a game, Miracast is a better choice. DLNA is optimal for watching downloaded movies in high quality without putting a strain on your PC. Image quality and latency also directly depend on the bandwidth of your WiFi router and the supported frequencies.
Preparing equipment and network
Successfully setting up a wireless streaming connection is impossible without first checking your network infrastructure. First, ensure that your computer and TV are connected to the same router. Users often encounter the problem of the PC being connected to the 5 GHz band, but the TV only seeing the 2.4 GHz network. This isn't a problem if the router is configured correctly, but it does require attention.
Modern Smart TV have built-in WiFi modules, but older models may require an external adapter or media player. Make sure your TV has device discovery enabled, which may have different names depending on the brand: Screen Share, Smart View or simply "Connect to device".
- 📶 Check that both devices are connected to the same WiFi network (SSID).
- 🔄 Update your TV's firmware and WiFi adapter drivers on your computer.
- 🛡️ Make sure your antivirus or firewall is not blocking your local connection.
Signal stability is key: if the router is located in the next room behind thick walls, the video stream may be interrupted or have a lower resolution. For streaming 4K content, it's recommended to use the 5 GHz band, which provides higher data transfer rates.
Broadcast via Windows' built-in feature (Miracast)
Windows 10 and 11 operating systems have built-in support for Miracast technology, allowing you to display content on a compatible TV without installing additional software. This method is ideal for mirroring your desktop, viewing photos, or sharing web pages. The setup process is extremely simple and takes just a few clicks.
To start, open the notification center by pressing the key combination Win + A, and select the "Project" (or "Connect") button. The system will begin searching for available wireless displays within range. If the TV supports signal reception, it will appear in the list of available devices.
☑️ Check before connecting Miracast
After selecting your TV, a connection confirmation prompt may appear on the screen, which you'll need to confirm with your remote control. Depending on your settings, you can select "Duplicate" mode to see the same content on your TV as on your monitor, or "Extend" mode to use your TV as a second desktop.
It's important to note that input lag when using Miracast can range from 0.5 to 2 seconds, making it unsuitable for fast-paced gaming, but quite comfortable for watching videos and working with documents. If the image quality seems low, check the resolution settings in the menu. Settings → System → Display.
Using DLNA to play files
If your goal is to play a video file stored on your computer's hard drive, DLNA is the most efficient method. It doesn't require mirroring the entire screen, reducing processor load and allowing playback control directly from the TV remote. In Windows, this feature is implemented via media streaming.
To activate, open "Media Streaming Settings" in the Control Panel. The system will prompt you to enable streaming and select devices allowed to access content. Find your TV in the list and set its status to "Allowed."
After setup, open the video file folder in File Explorer, right-click it, select "Cast to Device," and select your TV. Playback will begin automatically, and control will be available through the TV interface.
| Parameter | Miracast | DLNA | Chromecast |
|---|---|---|---|
| Transmission type | Full screen | Media files only | Tabs/Applications |
| PC addiction | High (PC must be active) | Average (start only) | Low |
| Delay | Yes (0.5-2 sec) | Absent | Minimum |
| Quality | Depends on the signal | Original (uncompressed) | Adaptive |
The advantage of DLNA is that the TV decodes the video itself using its hardware resources. This means you can turn off your PC monitor or minimize the Explorer window, and the movie will continue playing. However, the file format must be supported by the TV's codecs.
Broadcasting via Google Chrome browser
The Google Chrome browser has powerful built-in functionality for casting the contents of tabs or the entire desktop to Chromecast-enabled devices or Android TV. This method is especially convenient if the standard Windows tools don't recognize the TV or are unstable.
Open your browser and click the three dots in the upper right corner, then select "Cast." A list of available devices will appear in the window that opens. By clicking "Sources," you can choose what to cast: a browser tab, the entire screen, or a specific file.
Why can't the browser see the TV?
If your TV isn't showing up in the Chrome menu, make sure the Chromecast built-in or Google Cast app is running on your TV. Also, check if your antivirus software is blocking local browser traffic. Restarting the SSDP service in Windows can sometimes help.
This method often results in a more stable picture when watching online video, as the browser takes care of buffering the stream. Chrome also allows you to stream audio from a tab, which is convenient for listening to music from web players on a high-quality TV speaker system.
Keep in mind that streaming the entire screen through a browser can increase CPU load, especially at high resolutions. For comfortable viewing of 4K content through a browser, we recommend using a wired connection from your PC to the router, reserving WiFi for the TV only.
Troubleshooting connection and latency issues
Even with proper setup, users may experience artifacts on the screen, audio desync, or intermittent connection drops. Most often, this is due to congestion on the Wi-Fi channel from neighboring routers or insufficient signal strength.
Try changing the WiFi channel in your router settings to a less crowded one (e.g., 1, 6, or 11 for the 2.4 GHz band). If your router is dual-band, force both devices to use the 5 GHz frequency, which is less susceptible to interference from microwave ovens and Bluetooth devices.
⚠️ Please note: TV interfaces and operating systems are updated regularly. Menu item names may differ from those described in the instructions. If you can't find the option you need, consult the official user manual for your model.
If the image is streaming but the sound is coming from your computer speakers, check your playback device settings. In Windows, click the speaker icon in the system tray, select the arrow next to the volume slider, and set the TV as the default output device.
FAQ: Frequently Asked Questions
Is it possible to stream video if the TV is not Smart TV?
Yes, this requires purchasing an external set-top box, such as a Chromecast, Apple TV, or Android box, which connects to the HDMI port of a regular TV and adds Smart features to it.
Why does the video stutter or lag when streaming?
Most likely, your WiFi connection speed is insufficient for the selected video bitrate. Try lowering the stream quality in your player or moving the router closer to the receiver.
Does streaming affect internet speed on other devices?
Yes, because the video stream takes up a significant portion of the bandwidth. If you're watching a 4K movie, other users may not have enough bandwidth to enjoy the experience.
How do I turn off the broadcast?
The easiest way is to click the "Disable" button in the Windows projection menu (Win + K) or in the browser interface. You can also simply turn off the TV.