Modern technologies make it possible to transform a living room into a true entertainment center, with multiple screens working in sync. Connecting two TVs via Wi-Fi is becoming increasingly important for owners of large apartments, bars, or exhibition halls. Wireless connections eliminate the need to run long HDMI cables across the room, preserving the aesthetics of the interior.
However, despite the development of data transmission standards, it is technically impossible to directly connect two TVs point-to-point without the use of a router or intermediary computer. Wi-Fi Direct and protocols Miracast or DLNA These systems require a control device or a shared network. In this article, we'll examine all the operational schemes for organizing a multimedia network where images are transmitted to multiple receivers simultaneously.
There are several proven use cases for this connection: duplicating the image to increase audience reach or creating independent viewing zones within a single home network. The choice of method depends on the operating system of your TVs (Android TV, Tizen, webOS) and the availability of additional equipment. Below, we'll examine each method in detail so you can choose the best one for your situation.
Technical limitations and operating principles of Wi-Fi networks
Before you begin setting up, it's important to understand the fundamental principles of wireless networking in the context of multimedia. Standard Wi-Fi router It acts as an access point to which all devices connect. TVs themselves cannot "see" each other to transmit a high-definition video stream without an intermediary.
Most often, when users connect two TVs, they mean broadcasting the same image from an external source (smartphone, laptop, or media player) to both screens. Direct over-the-air signal transmission from one TV's display to another isn't supported by the architecture of most consumer devices. Data transfer protocols require one device to be a source and the other a sink, and televisions rarely perform the role of a source.
⚠️ Attention: Attempts to connect two TVs directly via Wi-Fi Direct without a router often result in errors, as one of the devices must act as an access point, thereby losing internet access for streaming content.
To organize stable work you will need home network, where all devices are on the same subnet. This ensures minimal latency and the ability to manage the flow. If you plan to use this setup for commercial purposes, such as in a bar, make sure your router can handle multiple connected clients without losing bandwidth.
Using Screen Mirroring and Wi-Fi Direct
The most common way to make two TVs show the same picture is to use technology Screen Mirroring (screencasting). In this case, the signal source is not one of the TVs, but a third device: a smartphone, tablet, or laptop. Both TVs must support the standard Miracast or have a built-in "Broadcast" function.
The setup process is as follows: you connect the first TV to the Wi-Fi network and launch the app on it to receive the signal. Then you do the same with the second device. After that, on your smartphone, you select the "Cast" function and connect to each TV in turn. Some modern smartphones allow you to create device groups for simultaneous transmission.
- 📺 Make sure both TVs are connected to the same 5GHz Wi-Fi network for best speed.
- 📱 On your smartphone, activate the "Cast", "Smart View" or "Screen Mirroring" function.
- 🔗 In the list of available devices, select the first TV, wait for it to connect, then add the second one (if the OS allows).
- ⚙️ In your router settings, make sure AP Isolation is disabled.
It's worth noting that image quality may vary. If you're using a budget router, you may experience artifacts or audio desync when connecting two high-definition streams. Signal delay Latency will inevitably increase under such conditions. This isn't critical for viewing static content or presentations, but it can be noticeable for dynamic games or sports.
Organizing a multimedia network via a DLNA server
If your goal is not to duplicate your smartphone screen, but to run a movie stored on a computer or network storage on two TVs (NAS), the ideal solution would be technology DLNAIt allows devices on a local network to exchange media content. In this setup, one computer or server acts as a storage device, and TVs act as renderers.
To implement this method, you need to install a special server program on your computer, for example, Universal Media Server Or use built-in Windows tools. After adding video folders to the server library, you go to the menu on each TV, select the "Media" or "Home Network" signal source, and see the available files. Playback starts independently on each TV.
| Parameter | Description | Recommended value |
|---|---|---|
| Protocol | Data transfer type | DLNA / UPnP |
| Video codec | Compression format | H.264, H.265 (HEVC) |
| Network speed | Minimum Wi-Fi speed | from 50 Mbps |
| Audio track | Supported formats | Dolby Digital, AAC, MP3 |
The main advantage of DLNA is its independence from smartphone performance. TVs decode the video stream themselves, ensuring the highest image quality possible for their displays. However, synchronizing playback on two screens with millisecond accuracy via DLNA is virtually impossible—a 1-3 second delay is the norm for this technology.
Why does desync occur with DLNA?
Latency occurs due to buffering. Each TV loads its own data buffer before starting playback, and the speed of this process depends on the current load on the TV's processor and the quality of the Wi-Fi signal in the room.
Sync via Android TV and Google Home
Owners of TVs with the operating system Android TV or Google TV are in a better position. The Google ecosystem offers built-in tools for grouping devices. Although the Multiroom feature is primarily designed for audio (Google Cast), there are workarounds for video using third-party apps.
One effective solution is to use video conferencing applications or specialized digital signage software. By installing the same application (for example, Zoom, Skype (or a specialized player for showcases) on both TVs and logging into the same account, you can start the video stream simultaneously. There are also apps like AirScreen, which turn the TV into a signal receiver.
For more advanced users, a method of use is available ADB (Android Debug Bridge)By connecting to your TV via a network from a computer, you can send commands to launch apps and play media files. This requires technical knowledge, but provides maximum control.
adb connect 192.168.1.105
adb -s 192.168.1.105 shell am start -n com.android.tv/.MainActivity
Using a voice assistant Google Assistant It also lets you create device groups. You can say, "Hey Google, play YouTube on all screens," and if your devices are grouped in the Google Home app, the command will be executed. It's the most convenient way to control your home.
☑️ Android TV Readiness Check
Specifics of connecting Samsung and LG TVs
Major electronics manufacturers are developing their own ecosystems that can limit or, conversely, expand connectivity options. For example, Samsung has a feature Multi View, but it is designed to split the screen of one TV into two parts, and not to connect two different devices.
Televisions LG with the system webOS Offer a "Model" feature (demonstration mode), which allows you to sync settings and content across multiple screens in retail spaces. However, activating this feature often requires a special dongle adapter or a LAN cascade connection, not just Wi-Fi. At home, LG owners often use the app. LG ThinQ for control, but it cannot duplicate the video stream to a second TV.
⚠️ Attention: Sync features in Hotel or Retail modes on Samsung and LG TVs may block access to standard user settings. Don't enable them unless absolutely necessary.
If you have two TVs from different brands, for example, one Samsung and one Sony, native synchronization capabilities are minimal. In this case, the only universal solution is to use an external signal source (a laptop with two Wi-Fi adapters or a powerful router with media server functionality) or purchase dedicated Wi-Fi video senders.
Alternative Solutions: HDMI Splitter and Wi-Fi Extenders
If wireless methods don't provide the stability or quality you desire, hybrid options are worth considering. There are devices called Wi-Fi HDMI SenderThis is a transmitter and receiver kit. You can buy two of these kits, but synchronizing them is difficult. A more reliable option is to use a wired one. HDMI Splitter (splitter) at the signal source and long HDMI cables, if the distance allows.
For longer distances, they are used Wi-Fi video senders With multipoint support. These professional devices allow a single transmitter to broadcast a signal to multiple receivers simultaneously with minimal latency. This equipment is more expensive than household appliances, but it guarantees business results.
You can also use a computer with two video cards or a single video card with multiple outputs, connected to Wi-Fi, and run the desktop cloning program on it. The image will be transmitted to two TVs connected to the PC via cables, while the PC itself will receive the content over the air. This is a compromise, but very stable option.
Frequently Asked Questions (FAQ)
Is it possible to connect two TVs of different brands via Wi-Fi?
This can't be done directly using the built-in features of TVs due to differences in operating systems and protocols. However, you can use a common signal source, such as a smartphone with multicast support or a computer with a media server, which will stream to both devices, regardless of brand.
Why does the video lag so much when broadcasting to two TVs?
Slowdowns are caused by insufficient Wi-Fi bandwidth. When you stream high-quality video to two devices, the router's load doubles. If the router operates at 2.4 GHz or has a slow processor, buffering is inevitable. Solution: switch to 5 GHz or reduce the video bitrate.
Do you need internet to connect TVs together?
Internet access is not required for a local network (DLNA, Miracast) to function. It's enough for the router to be turned on and create a local network to which all devices are connected. However, for streaming content from online cinemas (YouTube, Netflix), internet access is, of course, necessary.
Is there a sound delay between the two TVs?
Yes, there's almost always a delay. It can range from 0.5 to 3 seconds. This is because each TV processes the video signal and audio stream at different speeds, depending on its processor and current workload. This isn't critical for background music, but for synchronized sound in a large auditorium, professional synchronization systems are required.