Modern multimedia systems eliminate the need for bulky HDMI cables, which often get tangled and restrict freedom of movement. Wirelessly transmitting images from a PC or laptop monitor to a large TV screen is a standard feature available to most users. Wireless connection ensures a clean interior and allows you to instantly share content with guests or colleagues.
However, the setup process may vary depending on your computer's operating system and the platform it is running on. Smart TVThere are various data transfer protocols such as Miracast, DLNA And AirPlay, each with its own characteristics and hardware requirements. Understanding the differences between them will help avoid connection errors and image lag.
In this article, we'll take a detailed look at all current broadcasting methods, focusing on signal stability and image quality. You'll learn how to set up screen projection on Windows and macOS, which apps to use for older TV models, and how to optimize your network to minimize lag. The key condition for all methods is that both devices are located in the same local Wi-Fi router network.
Wireless video streaming technologies: Miracast, DLNA, and AirPlay
Before you begin setting up, it's important to understand the terminology, as different manufacturers use different marketing names for the same technologies. Miracast Wi-Fi Direct is a wireless multimedia content transmission standard developed by the Wi-Fi Alliance. It enables real-time image and audio transmission, creating a direct connection between devices, often without a router (Wi-Fi Direct technology).
Unlike Miracast, the protocol DLNA (Digital Living Network Alliance) was originally created for streaming pre-rendered files (video, music, photos) from a server (computer) to a renderer (TV). It's not designed for mirroring your entire desktop in real time, but it's ideal for watching movies. AirPlay — Apple's proprietary protocol that provides the highest quality transmission, but is natively supported only by Apple ecosystem devices and Apple TV-licensed televisions.
The method you choose depends on your goals: Miracast is better for presentations and gaming, while DLNA is better for browsing your media library. It's important to keep in mind that Wi-Fi bandwidth directly impacts image quality. When using the standard Wi-Fi 5 (802.11ac) or Wi-Fi 6 Delays are practically unnoticeable, whereas on older 2.4 GHz routers some slowdowns are possible.
⚠️ Note: Some budget TV models may only support DLNA but not have a built-in Miracast decoder. In this case, screen mirroring without additional set-top boxes (such as Chromecast or Apple TV) will not be possible.
Preparing your home network and equipment
Successful screen sharing is 90% dependent on the quality of your local network settings. For stable operation without stuttering or audio desync, both the computer and TV must be connected to the same network. If your router supports dual-band operation, critical Connect both devices to a 5 GHz network. This frequency provides higher data transfer rates, although it has a shorter range than 2.4 GHz.
Check your router settings: Client Isolation (or AP Isolation) should be disabled. If this option is enabled, devices connected to the Wi-Fi network will not be able to see each other, making video transmission impossible. It's also recommended to update your router firmware and your computer's Wi-Fi adapter drivers to the latest versions, as manufacturers often fix compatibility issues in new releases.
The placement of your devices also plays a role. For the best signal, try to avoid large metal objects or thick concrete walls between your router, PC, and TV. If the signal is weak, use Wi-Fi repeater or switch to a wired connection to the TV via a LAN cable, leaving the computer on a wireless connection (although for Miracast it is desirable that both devices are in the same conditions).
☑️ Network readiness check
Cast your screen from Windows 10 and 11 to a Smart TV
Windows operating systems have a built-in projection feature based on the Miracast standard. This allows you to broadcast your screen without installing additional software, as long as your TV supports the technology. Screen Mirroring or Wireless DisplayTo get started, you often need to find and launch an app on your TV remote with a name like "Screen Share," "Miracast," "Broadcast," or "Wireless Display."
On your Windows 10 or 11 PC, open the Start menu and go to Settings → System → Project to this PCMake sure the feature is added (if not, click "Additional Features" and find "Wireless Display"). After preparing the TV, press the following key combination on your PC keyboard: Win + KA connection panel will appear on the right side of the screen, where your TV should be displayed.
After selecting the device, the system will prompt you to select the operating mode: “Second screen only”, “Duplicate” or “Extend”. Mode "Recurring" duplicates the image from the monitor to the TV, which is convenient for demonstration. The mode "Expand" Turns your TV into a second monitor, allowing you to drag and drop program windows with your mouse, perfect for watching videos in your browser while you work on your main screen.
| Parameter | Description | Recommendation |
|---|---|---|
| Permission | Number of pixels horizontally and vertically | Set your TV's native resolution (usually 1920x1080 or 3840x2160) |
| Refresh rate | Frames per second (Hz) | 60 Hz for video, 30 Hz if lags are observed |
| HDR format | High Dynamic Range | Enable only if TV supports HDR10 |
| Scaling | Size of interface elements | Customize for readability from the couch |
Using AirPlay for macOS and iOS users
Apple device owners have the best experience thanks to the AirPlay ecosystem. Connecting a Mac to a TV doesn't require built-in Apple TV support—many modern models from Samsung, LG, Sony, and Vizio have built-in AirPlay 2. Make sure AirPlay support is enabled on your TV in the network settings or general settings.
On Mac, click the icon Control center (two toggled switches) in the menu bar and select "Screen Mirroring." Select your TV from the list of available devices. If this is your first time using the TV, a four-digit code may appear on the TV screen that you'll need to enter on your computer. Once paired, your macOS image will be mirrored to the big screen with minimal lag.
For iPhone or iPad users, the process is even simpler: open Control Center (swipe down from the upper-right corner or up from the bottom) and tap "Screen Mirroring." Apple devices automatically optimize the video bitrate based on the Wi-Fi signal quality, ensuring a smooth picture. However, it's worth keeping in mind that AirPlay requires more network bandwidth than Miracast.
⚠️ Note: When using AirPlay through third-party emulator apps on non-Apple-certified TVs, audio and video may become out of sync. In such cases, it's best to use a cable connection or Chromecast.
Alternative methods via browser and third-party utilities
If built-in OS tools don't work or your TV is too old and doesn't support modern protocols, browsers and specialized software can help. Google Chrome has a built-in Cast feature that allows you to cast a tab or your entire desktop to Chromecast-enabled devices (built-in or external).
To do this, open Chrome, click the three dots in the upper-right corner, and select "Save & Share" → "Cast..." (or just the cast icon). In the window that opens, you can select the source: a tab, a file, or the entire screen. This method works on all operating systems, including Linux, and is often the most stable solution for viewing web content.
Among the third-party programs, the following stand out: LetsView, ApowerMirror And TeamViewerThey require installing a client application on both the PC and the TV (if there's an Android TV/Tizen/WebOS app store). These utilities often offer advanced functionality, such as controlling the computer with the TV remote, screen recording, or microphone audio streaming.
- 📺 LetsViewA completely free app that supports mirroring iOS, Android, and Windows content to a Smart TV. It features a simple interface and no watermarks.
- 🖥️ ApowerMirror: A powerful tool with high frame rates, suitable for gaming, but has limitations in the free version (session time limit).
- 🌐 DLNA servers: Programs like Universal Media Server or Plex Turn your PC into a media library. You won't see the desktop, but you'll have access to all the files on your hard drive through the TV interface.
Troubleshooting and quality optimization
Even with proper setup, users may encounter issues: the image flickers, the sound disappears, or the connection constantly drops. Most often, this is due to a congested Wi-Fi channel. If the router is located in an apartment building, neighboring networks may interfere. The solution is to access the router settings (usually at 192.168.0.1 or 192.168.1.1) and manually select a free channel in the 5 GHz band.
Another common issue is audio and video desynchronization. This can be addressed in the TV settings. Find the "Digital Audio Output" or "Audio Format" setting and try changing it from "Auto" or "Passthrough" to PCMThis will reduce the load on the TV decoder, although it will limit the sound to stereo format, but will eliminate lag.
If the image appears blurry, check your Windows scaling settings. Sometimes the system defaults to 150% or 200% scaling for TVs, which looks fine from a distance, but text may be blurry. Also, make sure your TV is in "PC" or "Game" mode to disable motion smoothing, which blurs static desktop images.
Why doesn't the TV see the computer even though both are connected to Wi-Fi?
Most likely, AP Isolation is enabled in the router settings, or the devices are connected to different guest networks. Also, check if your PC's antivirus software is blocking incoming connections.
Is it possible to stream audio from a computer to a TV via Wi-Fi?
Yes, when using Miracast and AirPlay, audio is transmitted automatically along with the video. Simply select the TV as the default output device in the Windows/macOS sound settings.
Does screencasting affect internet speed?
Streaming is done over a local network (LAN/Wi-Fi) and doesn't consume your ISP's data plan. However, it does use up your Wi-Fi bandwidth, so page loading speeds on other devices may temporarily decrease.
Which protocol is better for gaming: Miracast or AirPlay?
AirPlay 2 generally offers lower latency and better optimization, but requires Apple hardware. Miracast is universal, but can have noticeable input lag. For serious gaming, an HDMI cable is better.