Modern televisions have long ceased to be simply devices for watching broadcast channels, having transformed into powerful multimedia centers that require flexible content management. Streaming Sharing images and sound from a personal computer with a big screen is one of the most popular features, allowing you to enjoy movies, photos, and games without the hassle of wires. A wireless Wi-Fi connection eliminates the need to run long HDMI cables across the room, maintaining a clean and aesthetically pleasing design.
However, despite the apparent simplicity, the data transfer process may encounter technical nuances depending on the version of the operating system, TV model, etc. routerThere are several main transfer protocols, each with its own characteristics, from simple screen mirroring to file streaming. Understanding the differences between Miracast, DLNA and proprietary technologies like AirPlay will help you choose the best method for your situation.
In this guide, we'll cover all the current methods of streaming content in detail, focusing on connection stability and image quality. You'll learn how to set up projection In Windows 10 and 11, we'll cover how to use built-in Smart TV features and which third-party apps might be helpful in complex situations. The main requirement for all methods is that both devices must be on the same local network.
Network and hardware requirements for stable operation
Before configuring software settings, you need to ensure that your infrastructure is ready to handle heavy video streaming. Streaming quality directly depends on channel bandwidth and signal stability. If you plan to broadcast video in HD resolution, 4K HDR, the requirements for data transfer speed increase many times compared to FullHD content.
The ideal condition is that the router supports the standard Wi-Fi 5 (802.11ac) or newer Wi-Fi 6 (802.11ax)These standards operate in the 5 GHz band, which is less congested with interference from neighboring networks and household appliances than the traditional 2.4 GHz band. Using the 5 GHz frequency is critical for minimizing latency and preventing compression artifacts during image transmission.
⚠️ Important: If your router is dual-band, make sure both your computer and TV are connected to the 5 GHz network. A mixed connection (one device on 2.4 GHz and one on 5 GHz) can sometimes cause issues with device detection on the local network due to client isolation settings on some router models.
It's also worth paying attention to the distance between devices. Walls, especially load-bearing or reinforced ones, can significantly weaken the signal. For comfortable streaming without buffering, the signal level on the receiving device (TV) should not be lower. -70 dBmIf the signal is weaker, consider using a Wi-Fi repeater or switching to a wired connection for at least one device.
Broadcasting via the Windows Projection feature (Miracast)
The fastest way to display an image from your computer on a TV without installing additional software is to use the built-in Windows function called "Projection." This technology is based on the standard Miracast, which allows for a direct Wi-Fi connection between devices. This method is ideal for sharing presentations, browsing the web, or playing low-resolution games.
To get started, make sure your TV has wireless display support enabled. This feature may be called different things in your Smart TV menu: "Screen Share" for LG, "Smart View" for Samsung, or simply "Wireless Monitor" for Sony. After activating standby mode on your TV, press the following key combination on your computer keyboard: Win + K.
The "Connect" panel will appear on the right, where Windows will search for available displays. Select your TV from the list. Once paired, you can choose the operating mode: mirror your screen, extend your desktop, or use the TV solely as a second monitor.
☑️ Checking Miracast Readiness
It's worth noting that image quality and input lag are highly dependent on the power of your computer's Wi-Fi module. If you notice audio and video out of sync or cursor jitter, try lowering the output resolution or closing background apps that are consuming bandwidth.
Using DLNA technology for file streaming
Unlike screen mirroring, the technology DLNA (Digital Living Network Alliance) is designed for transmitting specific media files: video, music, and photos. The computer acts as a server, and the TV acts as a renderer, decoding and playing the stream. This is the most energy-efficient way to watch movies, as the TV processes the video file itself.
In Windows 10 and 11, DLNA functionality is built into the default media player. To share a folder of movies, open "Streaming Media Settings" from the Control Panel or context menu. Here you'll see a list of devices on the network; find your TV and allow it to access the content.
After setting up your computer, launch the "Movies & TV" app (or any other DLNA-enabled player, such as VLC). In the player's interface, find the "Cast to Device" button, select your TV, and select the file to play. Playback controls (pause, rewind) will be available directly from the TV remote.
| Parameter | Miracast (Projection) | DLNA (Streaming) |
|---|---|---|
| Content type | Full screen or window | Files (video, photo, audio) |
| Delay | Noticeable (for dynamic games) | None (if network speed is sufficient) |
| PC load | High (video encoding) | Low (data transfer only) |
| Background work | Impossible (screen is busy) | Possible (can work on a PC) |
The advantage of DLNA is that you can continue working on your computer while a movie is playing on your TV. However, the file formats that can be played are limited by the codecs supported by the TV itself. If the TV doesn't recognize the audio or video format, the file won't play without first being converted.
Broadcast via Google Chrome browser and Chromecast
If your TV doesn't natively support Miracast or you want to cast the contents of a browser tab, Google Chrome is your friend. The built-in "Cast" feature uses Miracast technology. Chromecast built-in, which is available in many modern Smart TVs (especially those with Android TV), or through a separate Chromecast set-top box.
To start, open the Chrome browser on your computer. Click the three dots in the upper-right corner of the menu and select "Cast." The system will prompt you to select a source: you can cast just the current tab, the entire desktop, or a specific audio file. Once you've selected the source, click the name of your TV.
This method is especially convenient for displaying content from websites that don't directly support Smart TV apps, or for sharing documents from Google Docs. Transmission quality is typically higher than Miracast thanks to Google's efficient compression algorithms, but latency is still present.
⚠️ Note: When casting a browser tab, audio may not be transmitted by default. Be sure to check the "Cast tab audio" box in the source selection menu if you want audio for the video.
There's also the option to cast your entire computer screen, which is useful if you have a browser that doesn't support direct Chromecast integration but want to use its output engine. In this case, select "Cast screen" in the source menu.
Broadcast for macOS and Apple TV (AirPlay) owners
Apple users benefit from the ecosystem AirPlay 2Many modern TVs from Samsung, LG, Sony, and Vizio now have built-in AirPlay 2 support, allowing you to stream content from a Mac or iPhone without purchasing an additional Apple TV box.
To start casting from a Mac, make sure macOS is updated to the latest version. Click the Control Center icon in the menu bar and select Screen Mirroring. Your TV should appear in the list of available devices.
When you connect for the first time, you may see a message on your TV screen. security code, which must be entered on the computer. This is a security measure against unauthorized access. After successful pairing, the image from the Mac will be mirrored on the TV. The system will automatically adjust the resolution and frame rate to the display's capabilities.
What should I do if my TV isn't visible in AirPlay?
Make sure AirPlay is enabled on your TV in the network settings. Also, check if your firewall or antivirus software is blocking incoming connections to the mDNS service (port 5353), which is used to discover Apple devices.
A key advantage of AirPlay is its support for multi-room audio and the ability to use an iPad or iPhone as a remote control. Furthermore, the protocol offers very low latency, making it suitable even for certain types of casual games.
Troubleshooting connection and buffering issues
Even with an ideal setup, users may experience interruptions in the stream or the inability to locate a device. A common cause is network separation: if the router distributes Wi-Fi with the same name (SSID) for both 2.4 GHz and 5 GHz frequencies, some devices may become stuck on the slower frequency. In such cases, temporarily separating network names in the router settings can help.
Another common issue is outdated wireless adapter drivers. Go to Device Manager, find your network adapter, and check for updates. Sometimes, uninstalling the device and restarting the computer will force Windows to install a more recent driver automatically.
If your streaming experience is constantly interrupted by buffering, try lowering the bitrate or resolution in your player settings. It's also worth checking that your channel isn't overloaded by other devices: large file downloads, cloud photo syncing, or video calls on other devices can choke your stream.
Frequently Asked Questions (FAQ)
Is it possible to stream games from PC to TV without lag?
For fast-paced games (shooters, racing games), wireless methods like Miracast or AirPlay aren't suitable due to input lag. For a comfortable gaming experience, it's better to use a wired HDMI connection or specialized solutions like NVIDIA GameStream (Moonlight), which are optimized to minimize lag but still require a perfect Wi-Fi 6 signal.
Why can the TV see the computer but not play video?
Most likely, your TV doesn't support the codec the video file is encoded in (e.g., HEVC/H.265 or a DTS audio track). In this case, DLNA won't work. Solution: Use the "Projection" method (Miracast), where the computer handles encoding, or install a third-party player (e.g., VLC or MX Player) on your TV that supports more formats.
Does streaming affect internet speed?
Using DLNA or local Miracast doesn't consume internet bandwidth, as data is transmitted within the local area network (LAN). However, if you're streaming online video (YouTube, Netflix) from a PC browser to your TV, the traffic goes over the internet, and your connection speed must be sufficient for high-quality streaming.
How to improve picture quality over a wireless connection?
In your TV settings, select the "Game" or "PC" picture mode to disable unnecessary post-processing that adds latency. On your computer, in the Wi-Fi adapter properties in Device Manager, you can try changing the "Power Saving Mode" setting to "Disabled" and the packet priority to "High."