Modern multimedia systems allow you to completely eliminate unnecessary wires, turning your living room into a real cinema in a matter of seconds. Wireless transmission Streaming video from a laptop or desktop PC to a large screen is a standard supported by most modern devices. You no longer need to search for long HDMI cables or drag them across the room, risking tripping.
There are several proven technologies that can be implemented screen duplication or streaming media files without a physical connection. The main standards are Miracast, a protocol built into Windows DLNA for working with files and proprietary solutions like Google CastThe specific method you choose depends on your computer's operating system and TV model.
In this article, we'll detail the steps for different use cases. You'll learn how to quickly set up screen projection for presentations or games, as well as organize high-definition movie viewing. The key condition for all methods is that both devices are on the same local Wi-Fi network.
Wireless streaming technologies: Miracast, DLNA, and Chromecast
Understanding the differences between the main protocols will help you choose the best connection method for your needs. Miracast — is a standard developed by the Wi-Fi Alliance that allows for direct video transmission, creating your own network or using an existing one. It's ideal for full desktop mirroring.
Unlike him, DLNA (Digital Living Network Alliance) doesn't broadcast the screen image in real time, but allows for sharing of the media library. In this case, the TV acts as a renderer, playing files stored on the computer's hard drive. This method is less demanding on the PC's processor.
Technology Google Chromecast (or Chromecast built-in) works on a command-based principle: the computer sends the TV a link to the content, and the TV downloads and plays the stream. This reduces network load and allows you to use your phone or PC as a remote control.
- 📡 Miracast — full screen mirroring, suitable for games and presentations.
- 📁 DLNA — playback of files (video, photo, music) from folders.
- 🌐 Chromecast - streaming by link, minimal control delay.
Preparing equipment and a Wi-Fi network
Before you begin configuring the software components, you need to ensure that the physical infrastructure is ready. Both devices—the computer and the TV—must be connected to the same Wi-Fi networkIf you have a dual-band router, it's recommended to use the 5 GHz band to ensure sufficient throughput.
Make sure the Smart TV function is enabled on your TV and is active. Some models require you to manually launch the signal reception app, which may be called Screen Share, Miracast or simply "Broadcast." Without active standby mode, the TV will not be visible in the list of available devices.
⚠️ Note: If your router is configured with AP Isolation, your computer and TV won't be able to see each other, even if they're on the same network. Disable this feature in your router settings.
Make sure the drivers are Wi-Fi adapter Your computer's wireless module software is updated to the latest version. Outdated wireless module software often causes unstable connections or the complete absence of wireless display functionality on the system.
Mirroring Windows 10 and 11 screens using Miracast
Windows operating systems have built-in support for wireless display technology. This is the fastest way to display an image without installing additional software. To get started, press the key combination Win + K on the keyboard.
The "Connect" panel will open on the right. The system will begin searching for available devices within range. Your TV should appear in the list with the corresponding model name. Click it to initiate the connection.
A connection confirmation message may appear on the TV screen. Use the remote control to select Allow or AcceptAfter this, the image from the PC monitor will appear on the big screen.
☑️ Check before connecting Miracast
Once successfully connected, you can change the projection mode. Click Win + Pto choose a display option: duplicate, extend, or use only the second screen. Mode Expand turns the TV into a second monitor, which is convenient for work.
⚠️ Note: The display settings interface may vary depending on your Windows version and installed security updates. If the menu doesn't open, check your system patches.
Using DLNA to play files
If your goal is to watch a movie or photos, rather than mirror your desktop, DLNA is more efficient. It doesn't put a strain on your PC's processor, as the TV decodes the video stream itself. In Windows, this feature is available through "Streaming Media Settings."
To activate, find the application in the Start menu Streaming media optionsIn the window that opens, click "Enable media streaming." The system will prompt you to select devices that are allowed to access your libraries.
After confirmation, the TV will have access to the standard folders: Videos, Music, and Pictures. You can open any file in these folders using the standard Windows media player, right-click, and select Transfer to device, indicating your TV.
| Parameter | Description | Recommendation |
|---|---|---|
| Video format | MP4, MKV, AVI | Use MP4 for better compatibility |
| Codec | H.264, H.265 (HEVC) | Check if your TV supports the codec |
| Permission | up to 4K | Depends on the Wi-Fi channel speed |
| Audio | Dolby Digital, AAC | Priority to multi-channel audio |
What should I do if my TV can't see the files?
Make sure the "Network" (private network) is allowed in Windows Firewall. Often, when connecting to a new Wi-Fi network, the system marks the network as "Public," which blocks file access by default.
Broadcasting via Google Chrome browser
If Windows' built-in tools don't work or your TV doesn't support Miracast, a browser can help. Google ChromeIt has a built-in Cast function that works on most Smart TVs with Chromecast or Android TV support.
Open your browser and click on the three dots in the upper right corner, then select Broadcast... (Cast). In the menu that appears, you'll see available devices. By default, the browser will offer to cast the current tab.
To display the entire desktop, click the button Sources (Sources) in the device selection window and select "Cast Screen." This will allow you to show any window or the entire desktop to the TV, regardless of the operating system.
- 🖥️ Tab — broadcasting only the contents of one browser page.
- 💻 Full screen - full duplication of the monitor with sound.
- 📁 File - playing a local video file through a browser.
This method is especially convenient if you need to quickly show a presentation or video from a website that doesn't have a built-in "casts" button. Image quality depends on the computer's performance, as it encodes the video stream for transmission.
Solution and increased stability
A wireless connection is always susceptible to external interference. If you experience choppy video, out-of-sync audio, or intermittent disconnects, first check to see if your neighbors are using your Wi-Fi channel. Switching your router to a less congested channel can significantly improve the situation.
It's also worth checking your Wi-Fi adapter's power-saving settings. In Device Manager, find your wireless adapter, go to Properties, and under the Power Management tab, uncheck "Allow the computer to turn off this device to save power."
⚠️ Warning: Antivirus software and third-party firewalls may block ports required for discovery protocols. If problems persist, try temporarily disabling protection for diagnostic purposes.
If input lag is making it impossible to work, try lowering the screen resolution on your computer before broadcasting. Transferring an image to 1920×1080 requires less than 4K, which reduces buffering.
The Secret to 4K Stability
To stream 4K HDR content without stuttering, it's crucial that your router supports Wi-Fi 5 (AC) or Wi-Fi 6 (AX). Older N-standard routers won't physically handle this data stream.
Why isn't my TV showing up in the list of available devices?
Most often, the problem is that the devices are on different subnets (for example, a guest Wi-Fi network) or client isolation is enabled. Also, check whether your antivirus software is blocking network detection.
Is it possible to transmit sound separately from the image?
Yes, in Windows 10/11, after connecting via Miracast, you can select the TV as the default audio output device in the Soundbar settings. When using DLNA, the audio is transmitted along with the video file.
Does broadcasting affect internet speed?
When using Miracast and screen mirroring, you may not use any internet connection at all (a direct connection is created). However, streaming online videos (YouTube, Netflix) via DLNA or Chrome consumes significant data.