Modern multimedia systems make it easy to share content between devices, and mirroring your computer screen to a large display has become a daily necessity. You can present presentations to colleagues, show off vacation photos, or play heavy games on a powerful PC using your TV as a monitor. Wireless WiFi connection eliminates the need to run long HDMI cables across the room and provides flexibility in the arrangement of your devices.
However, the setup process isn't always smooth, especially if you're new to it. Different operating systems, protocol versions, and router settings can introduce their own set of limitations into the connection process. In this article, we'll explore proven methods to help you. broadcast the screen without delays and artifacts, using standard Windows functions and the capabilities of the Android platform.
First, make sure both devices are on the same local network. This is a fundamental requirement for most wireless data transfer technologies to work. If your router broadcasts on both 2.4 GHz and 5 GHz frequencies, try connecting your laptop and TV to the same frequency to minimize latency.
Wireless image transmission technologies: Miracast and Chromecast
Before you begin setting things up, it's important to understand which protocols will be used. The main players in this field are Miracast And Google Cast (Chromecast). The first standard, developed by the Wi-Fi Alliance, allows for direct image transmission from device to device, creating a direct WiFi connection (Wi-Fi Direct). This means that image quality depends on the antenna power of your devices, not your internet speed.
The second option, Chromecast built-in, is a proprietary development of Google, which is deeply integrated into the operating system Android TVUnlike Miracast, the computer often acts as a remote control, sending commands to the TV, which then loads content or receives the video stream. This method often provides a more stable picture when watching videos from the Chrome browser.
⚠️ Attention: Some older TV models may only support one of the technologies. If the standard Windows method doesn't detect your TV, try using the Google Chrome browser for casting, as it uses the Google Cast protocol.
It's also worth mentioning that Miracast doesn't require internet access on the computer; a WiFi adapter is sufficient. However, a stable internet connection is crucial for streaming online video via Chromecast. The choice of method depends on your goals: Miracast is better for mirroring your desktop, while Cast is better for viewing web content.
Preparing the equipment and WiFi network
The quality of wireless video transmission directly depends on the condition of your local network. If you plan to stream 4K video or play fast-paced games, connection stability is a top priority. A weak signal or congested airwaves can cause audio and video to become out of sync.
The ideal scenario is to use a dual-band router and connect both devices to the 5 GHz network. This frequency is less congested by neighboring networks and provides higher throughput, which is critical for transmitting uncompressed video. Make sure there are no thick concrete walls or metal structures between the router and the devices that could block the signal.
Also check what's on your TV Android TV The latest system updates have been installed. Manufacturers frequently release patches that improve network module performance and fix bugs in the DLNA and Miracast protocols. On your computer, you should update the WiFi adapter drivers through Device Manager or the manufacturer's website.
Broadcasting via built-in Windows tools (Projector)
Windows 10 and 11 have a built-in feature that allows you to quickly connect to a wireless display. This method uses Miracast technology and doesn't require any additional software. To get started, press the key combination Win + K on your keyboard or go to the notification center and select "Connect."
The system will begin searching for available devices within WiFi range. A connection permission request may appear on the TV screen, which must be confirmed with the remote control. On some models Android TV You must first launch the Cast or Wireless Display app from the app menu for the TV to be visible for searching.
After successful pairing, you can control the display mode using the "Projection" menu. Options include: second screen only, duplicated, extended, or first screen only. Extended mode is more convenient for working with documents, while duplicated mode is more convenient for viewing photos. If you notice cursor lag, try lowering the screen resolution in Windows display settings.
☑️ Windows Projector Setup
It's important to note that the "Wireless Display" feature in Windows may be disabled on your system. You can check this under "Settings" -> "System" -> "Projecting to this PC." While this option is more related to receiving the image, it does confirm that the necessary components are present on your system. If searching doesn't yield any results, make sure the service is running. Windows Projection active.
Using Google Chrome Browser for Cast
If the standard Windows method does not work or is unstable, a great solution is to use a browser Google ChromeThis method is especially effective for casting browser tabs or the entire desktop to Chromecast-enabled TVs. Open the browser on your computer and click the three dots in the upper-right corner of the menu.
Select "Cast" from the drop-down list. A window will open to search for devices and select a source. By default, the current tab is cast, but by clicking "Sources," you can select "Cast Screen" to show everything that's happening on your computer monitor.
Chrome menu (three dots) -> Save & Share -> Cast...This method is often more stable than the system Miracast, as it uses optimized Google codecs. It also allows you to stream audio from a tab, which is convenient for watching videos from websites without built-in Cast support. Image quality can be adjusted in the casting settings, choosing between high image quality and high performance.
| Parameter | Miracast (Windows) | Google Chrome Cast | DLNA (Media) |
|---|---|---|---|
| Transmission type | Direct WiFi (P2P) | Via a router (Local Area Network) | Via a router (Local Area Network) |
| Delay | Low/Medium | Average (depending on WiFi) | Low (for video) |
| Sound | It is transmitted | Passed (from tab/screen) | Media files only |
| Internet | Not required | Desirable | Not required |
Setting up your Android TV to receive a signal
Sometimes the problem lies not with the computer, but with the TV settings themselves. On the platform Android TV Various service apps can be responsible for signal reception. Most often, this is the built-in Chromecast app, which is active by default but may require enabling in the settings.
Go to your TV's settings menu, select "Apps," and find System Services. Make sure the "Chromecast" and "Google Cast Receiver" apps are enabled. If you plan to use Miracast, look for the "Wireless Display" or "Cast" app (the name may vary depending on the brand, for example, Sony, Philips, Xiaomi) and launch it to put the TV into connection standby mode.
⚠️ Attention: On some TV models, the Miracast feature may be called "Screen Mirroring," "Smart View," or "Intel's WiDi." If the standard Windows search doesn't find your TV, try searching for an app with a similar name in the Android TV app menu.
It's also worth checking your power saving settings. If your TV goes into sleep mode or saves WiFi power, the connection may be interrupted. Go to Settings -> System -> Power and disable the sleep timer or set it to a longer time. This will prevent the screen from turning off unexpectedly while you're watching.
What should I do if my TV is not visible in the list?
Make sure AP Isolation is disabled on your router. This setting prevents devices on the same network from seeing each other, which prevents Miracast and Chromecast from working.
Troubleshooting and Delays
Even with proper configuration, users may experience artifacts, slowdowns, or a complete lack of video. One of the most common causes is a desynchronized clock or DNS cache. Try rebooting your router by completely disconnecting it for 10 seconds, then turning it back on. This will clear the buffers and assign new IP addresses.
If the image is choppy, try reducing the load on your WiFi channel. Switch your router to a clear channel in the 5 GHz band or, if that's not possible, 2.4 GHz, but make sure there are no strong sources of interference nearby, such as microwave ovens or baby monitors. For computers with external antennas, try repositioning them.
In some cases, your antivirus or firewall software on your computer may be blocking incoming connections from the TV. Check your security settings and add your home network to the trusted list. Temporarily disable the firewall to test this hypothesis.
If you're using a VPN on your computer, be sure to disable it before attempting to stream. A VPN changes the device's virtual location, causing the computer and TV to appear on different "networks" for discovery protocol logic, and they simply become unable to find each other.
Alternative solutions and third-party software
When standard tools fail, third-party applications come to the rescue. Programs like AirDroid Cast, LetsView or ApowerMirror offer advanced functionality: computer control via remote control, audio transmission via microphone, and operation via the Internet, not just via a local network.
Most of these apps require client installation on both your computer (Windows/macOS) and your TV (via the Google Play Store on Android TV). They often use proprietary compression algorithms, which allows for smoother images even on less-than-ideal WiFi connections.
However, it's worth keeping in mind that free versions of such programs often have session time or image quality limitations. For regular use and professional tasks, purchasing a license may be required. Nevertheless, this is an excellent backup option if the standard Google and Microsoft protocols don't work with your specific router.
Is it possible to stream a screen without a router?
Yes, Miracast (WiFi Direct) technology allows you to create a direct connection between your computer and TV without a router. However, for the initial handshake and some Smart TV features, an active local network is still preferable.
Why is there no sound during the broadcast?
Check your Windows sound settings. Click the speaker icon in the system tray and select the sound output device. Your TV should appear there (for example, "LG WebOS TV" or "Android TV"). If you select your laptop speakers, sound will only come from your computer.
Does broadcasting affect internet speed?
Using Miracast (a direct connection) doesn't use any internet connection at all. When using Chromecast or streaming online video, the traffic goes through the router, consuming bandwidth. A 4K stream requires a stable 25 Mbps connection per device.