Modern technologies make it possible to transform any living room into a full-fledged multimedia center without the use of unnecessary wires. Wireless connection HDMI has become the de facto standard for content transmission, freeing up space from the clutter of HDMI cables and providing an aesthetically pleasing appearance. Connecting a TV to a computer via Wi-Fi opens access to a vast library of files stored on the hard drive, allowing you to watch movies in high definition on a large screen.
There are several basic protocols and methods that are supported by most modern devices, from budget models to flagship ones. Smart TVThe specific method you choose depends on your PC's operating system, your TV's firmware version, and your intended use—whether it's viewing photos, playing games, or organizing presentations. In this article, we'll cover all the current synchronization methods in detail.
Before you begin setting up, you need to make sure that both devices – your computer and TV – are connected to the same wireless network. fundamental condition, without which data transfer over a local network is impossible. If the router supports dual-band mode, it is recommended to use the 5 GHz network to ensure maximum channel throughput.
Technical requirements and equipment preparation
A successful connection directly depends on the hardware and software support of both devices. For stable operation, you'll need a router that supports the following standards: Wi-Fi Direct or IEEE 802.11ac (Wi-Fi 5) and higher, which will ensure sufficient video stream transmission speed without delays and artifacts.
Most modern Smart TVs already have built-in modules for signal reception. However, if you're using an older model, you may need to purchase an external adapter, such as Google Chromecast or Apple TVThe computer must be equipped with a working Wi-Fi adapter with drivers updated to the latest version.
⚠️ Please note: When using a guest Wi-Fi network in a hotel or office, broadcasting may be blocked by the router's security settings, which isolate clients from each other.
Check the operating system version on your computer, as older versions of Windows or macOS may not support new codecs or video transfer protocols. Also, make sure the date and time are set correctly on both devices, as this often affects local network authentication.
Using built-in features in Windows 10 and 11
Microsoft operating systems offer native support for wireless displays via Miracast technology. This allows you to cast your entire desktop or a single application window to your TV without installing additional software. To get started, open the Start menu and go to Settings → System → Project to this PC.
Here you need to configure device discovery permission. Select "Available anywhere on secure networks" or "Always on" if you're in a trusted home environment. Once enabled, your TV should appear in the list of available devices when you press the key combination. Win + K.
- 📺 Open the signal source menu on your TV remote and select "Screen Mirroring", "Cast" or "Wireless Display".
- 🔍 On your computer, click
Win + Kand wait until the name of your TV appears in the list on the right. - 🔗 Tap the device name to establish a connection; a confirmation prompt may appear on the TV screen.
- 🎮 Select the operating mode: "Duplicate" (screen copy) or "Extend" (second monitor).
It's important to note that image quality and input lag are highly dependent on the Wi-Fi router's power. This method may not be suitable for gaming due to input lag, but it's ideal for watching videos or presentations. If the connection drops, try rebooting the Wi-Fi module on both devices.
Setting up a DLNA server for multimedia
Protocol DLNA (Digital Living Network Alliance) is designed primarily for streaming media content—video, music, and photos—rather than for mirroring your desktop. It's ideal if you want to watch a movie stored on your computer on a big-screen TV, controlling playback with a remote.
In Windows, this feature is implemented through "Media Streaming Settings." Go to Control Panel, find the appropriate section, and enable streaming. Your computer will begin streaming your media libraries to all compatible devices on the network.
On your TV, launch the "Media Player," "Smart Share," or similar app, depending on your brand. Select your computer from the list of sources. The folder structure will be displayed as a directory tree, making it easy to find the files you need.
| Protocol | Purpose | Delay | Quality |
|---|---|---|---|
| Miracast | Screencasting | Medium/High | Depends on the signal |
| DLNA | Viewing files | Absent | Original (uncompressed) |
| AirPlay 2 | Apple Broadcast | Low | High |
| Chromecast | Content streaming | Low | Adaptive |
If your TV can't see your movie folders, check your Windows Firewall settings. The system often blocks incoming connections to private networks, considering them potentially dangerous. You'll need to add an exception for the media service.
Why can't my TV see files of a certain format?
Smart TVs' built-in players often don't support all video codecs (for example, MKV with certain subtitles or DTS audio formats). In this case, your computer may be able to stream the file, but your TV won't be able to decode it. The solution is to install a third-party player on your TV (such as VLC) or convert the file.
Streaming via Google Chrome and Chromecast
If you don't have built-in Miracast support or are using an operating system other than Windows, a browser is a great solution. Google ChromeIt has a built-in casting feature that works on most Chromecast-enabled or Android TV-enabled TVs.
Open your computer's browser and click the three dots in the upper-right corner of the menu. Select "Cast." The browser will scan the network and suggest available devices. You can cast a single tab or your entire desktop.
- 🌐 Open Google Chrome and make sure you are signed in to your Google Account.
- 📡 Click the menu (three dots) → "Cast".
- 🖥️ Select "Cast desktop" if you want to show programs outside the browser.
- 📺 Select your TV from the list of devices.
This method is especially convenient for sharing websites, YouTube videos, or working with Google Docs. However, for fast-paced games, it may be less performant due to the way the browser encodes the video stream. A stable connection is critical here.
Connecting Apple devices (AirPlay)
For computer owners MacBook or iMac luckiest of all if their TV supports the technology AirPlay 2Many modern models from Samsung, LG, Sony, and Vizio already have built-in support for this protocol, allowing you to stream images without purchasing an Apple TV set-top box.
To connect, make sure your Mac and TV are on the same Wi-Fi network. In the control panel (in the upper right corner of the screen), find the "Screen Mirroring" icon (two rectangles). Select your TV from the list.
When you first connect, a four-digit code may appear on the TV screen. Enter it on your computer. After that, the Mac's display will be mirrored on the TV. In the display settings, you can choose between mirroring or using the TV as a second monitor.
⚠️ Note: AirPlay on third-party TVs may require periodic firmware updates. If the feature is missing or unstable, check the update section in the TV menu.
AirPlay 2 transmission quality is generally higher than Miracast, thanks to more efficient compression algorithms and low latency. This makes the technology suitable even for viewing 4K HDR video without stuttering.
Network Solution and Optimization
Even with proper setup, users may encounter issues such as audio and video desynchronization, low resolution, or constant connection drops. Most often, this is due to radio channel congestion or a weak signal.
Try changing the Wi-Fi channel in your router settings, switching from automatic channel selection to a less congested channel (e.g., 1, 6, or 11 for the 2.4 GHz band). For the 5 GHz band, select narrower channels if the signal is unstable, or, conversely, widen the channel for higher speeds.
☑️ Diagnosing connection problems
It's also worth disabling VPN services and aggressive antivirus settings that could block local traffic between devices during diagnostics. Make sure your computer isn't running any heavy background downloads that could choke the video stream.
If all else fails, try resetting your TV's network settings to factory defaults. Sometimes software issues with the TV's Wi-Fi module can only be resolved by completely resetting the network connection.
Questions and Answers (FAQ)
Is it possible to connect an old TV without Smart TV to a computer via Wi-Fi?
An old TV doesn't have the ability to receive a Wi-Fi signal on its own. To do this, you'll need to buy an external set-top box, such as Chromecast, Apple TV or Android Box, which connects to the HDMI port and takes over the function of receiving the signal.
Why does the picture flicker when streaming via Wi-Fi?
This is a sign of an unstable connection or insufficient bandwidth. Try lowering the video quality, moving the router closer to your devices, or switching to the 5 GHz band, which is less congested with interference.
Is sound transmitted along with the image?
Yes, when using Miracast, AirPlay, or Chromecast, audio is transmitted automatically. You may need to manually select your TV as the default output device in your Windows or macOS sound settings.
Does connecting a TV affect internet speed?
Local streaming (DLNA, Miracast) may not use the internet at all, as the data is transmitted within your network. However, the video streaming process itself takes up some of your Wi-Fi bandwidth, which may slightly reduce speeds for other devices.