The modern pace of life often forces us to consume content on small smartphone screens, but the pleasure of watching blockbusters or TV series is disproportionately higher on a large TV screen. Fortunately, the era of wires and complex adapters is gradually becoming a thing of the past, giving way to wireless data transmission technologies. The connection Android smartphone and Smart TV opens up endless possibilities for organizing a home theater without extra costs.
In this article we will look in detail at how to broadcast a video stream from a mobile device to a TV screen using the capabilities of your home Wi-Fi network. You will learn about the built-in functions of the system, third-party applications and nuances that will help avoid delays and loss of picture quality. The main advantage of this approach is the ability to watch movies freeusing existing equipment and legal streaming services or local files.
Wireless video transmission technologies: Miracast, Chromecast and DLNA
Before you start setting up, It is important to understand the difference between the main data transfer protocols, since the quality of the picture and ease of use depend on it. Most modern TVs and smartphones support several standards at the same time, but they work in different ways. Miracast (often called “Broadcast” or “Screen Mirroring”) creates a direct connection between devices, duplicating the phone screen one to one.
Unlike mirroring, the technology Google Chromecast works differently: the phone acts as a remote control, sending the TV a link to the video stream. This means that after starting the movie, you can minimize the application or even turn off the smartphone screen, and the movie will continue to play on the big screen. This significantly saves the battery power of the mobile device.
The third popular standard is DLNA (Digital Living Network Alliance). It is ideal for playing video files already downloaded to the phone's memory. In this case, the TV gets access to the smartphone’s media library as network storage. The choice of a specific method depends on your goals: it is better to stream from the Internet via Chromecast, and it is more convenient to open local files via DLNA.
- 📡 Miracast — full screen duplication, suitable for games and menu navigation.
- 🎬 Chromecast — streaming links, allows you to use the phone for other tasks while watching.
- 📂 DLNA — access to files in memory device, does not require a permanent screen connection.
⚠️ Attention: For all of the listed technologies to work, it is critical that both the TV and smartphone are connected to the same Wi-Fi network. If one of the devices works via the mobile data (4G/5G), and the other via a router, the connection will not be established.
Built-in Android functions: Broadcast and Smart View
Smartphone manufacturers often hide broadcast functions in different sections of the menu, calling them in my own way. On “pure” Android (Pixel, Motorola, Sony), this function is usually called “Broadcast” and is located in the notification shade or in the section settings Connected devices. Device owners Samsung will find the function Smart View, and users Xiaomi and Redmi should look for the “Broadcast” item in the control center.
The launch process is extremely simple: open the notification shade, find the corresponding icon and click on it. The smartphone will begin searching for available devices on the network. Once your TV appears in the list, select it. A request to confirm the connection may appear on the TV screen - agree using the remote control. After this, the image from the phone will appear on the big screen.
It is worth noting that when using the built-in broadcast, the quality of the picture may depend on the power of the Wi-Fi router and the distance to it. If you notice stuttering or audio out of sync, try moving closer to the router or rebooting it. Also, some older TV models may not support new codecs used in the latest versions of Android.
If the “Broadcast” function does not find the TV, check your router settings: the client isolation function (AP Isolation) must be disabled, otherwise the devices will not “see” each other on the network.
Using the Google Home application for Chromecast
If the built-in function of your smartphone does not work or the TV does not appear in the list, the most reliable solution is the official application Google Home. This is a universal tool for managing a smart home, which also ideally copes with the task of broadcasting content to devices with support Chromecast built-in.
After installing and configuring the application (you must be signed in to your Google account), open it and find your TV card in the list of devices. Click on it to open the control panel. At the bottom of the screen you will see a button Cast screen (Cast my screen). Pressing this button will start the process of mirroring the entire Android interface to the TV.
However, the main power of this method is revealed within specific applications. Open YouTube, Netflix or any other video service on your phone. In the player, find the rectangle icon with waves (Chromecast icon). Click on it and select TV. The video will start playing directly on the TV, using its decoders, which guarantees maximum quality and no load on the phone's processor.
| Parameter | Built-in broadcast | Google Home / Chromecast | Third-party applications |
|---|---|---|---|
| Transmission type | Screen mirroring | Stream or mirroring | Depends on the application |
| Battery consumption | High | Low (with streaming) | Average |
| Sound quality | Depends on the phone | Optimal (via TV) | Various |
| Convenience | Quick launch | Requires setup | Flexible settings |
Third-party applications to expand capabilities
Standard tools are not always ideal, especially if your TV is not “smart” or has outdated firmware. In such cases, specialized applications from Google Play Marketcome to the rescue. One of the most popular solutions is Web Video Caster. It allows you to send video from sites directly to your TV, bypassing the phone's browser.
The principle of operation is simple: you find a movie on the site through the app's built-in browser, press the play button, and the app automatically detects the device for broadcasting. The application converts the video stream into a format that your TV can understand. This is a great way to watch content from various online cinemas that do not have an official application for the TV.
Another powerful tool is BubbleUPnP. This is a combine for working with DLNA and Chromecast, which can broadcast not only video, but also music, as well as photo galleries. It supports on-the-fly transcoding, allowing you to watch video formats that your TV doesn't natively understand. For advanced users, this is an indispensable tool.
⚠️ Attention: Free versions of many broadcasting applications contain advertising. Be careful when clicking on pop-ups while searching for content so as not to go to dubious sites.
Why do some sites block streaming?
Some streaming services use DRM (Digital Rights Management) protection, which prevents protected content from being transmitted to external screens through third-party applications. In such cases, only the official service application on the TV helps.
Setting up DLNA to watch downloaded movies
If you have a collection of downloaded movies in high quality on your smartphone, and you do not want to waste mobile traffic on re-downloading them, use the protocol DLNA. To do this, you need to install a server application on your phone, which will provide access to the file system for the TV.
An excellent choice would be an application VLC for Android or a specialized server, for example, BubbleUPnP Server. After installation, go to the application settings and enable the “Network Access” or “Media Server” function. Make sure that the folders in which your video files are stored are selected.
Now take the TV remote control. Go to the signal sources menu (button Input or Source) and select the “Media”, “Devices” or “Network” section. You should see the name of your smartphone in the list. By opening it, you will have access to your phone's folders and will be able to launch any movie directly, using the TV's resources for decoding.
- 📁 Make sure that the power saving mode is turned off on your phone, otherwise the system may “kill” the server process while watching.
- 🔒 When connecting for the first time, the TV may request a confirmation code on the smartphone screen - enter it to establish a trusted connection.
- 🎚️ The volume is controlled by the remote control TV, since the audio stream goes directly to the speaker system.
Solving problems with connection and sound quality
Despite the simplicity of the technology, users often encounter the fact that the phone does not see the TV or the video is slow. The first and most common reason is different Wi-Fi frequencies. Many routers distribute two networks: 2.4 GHz and 5 GHz. If the phone is connected to one, and the TV to another, they may not see each other, although formally they are on the same network.
The second important aspect is signal strength. To transmit video in resolution 4K HDR a stable channel with high bandwidth is required. If the router is in another room across two walls, the 5 GHz signal may be unstable. In this case, try switching both devices to the 2.4 GHz frequency - the speed will be lower, but the connection stability will be higher.
Sound problems often arise when mirroring the screen (Miracast), when the audio stream is encoded in a format that the TV does not support. In your phone settings under Sound or in the broadcast menu, try changing the audio output from Surround to Stereo. This will solve the problem of no sound in 90% of cases.
☑️ Diagnosing problems with broadcasting
⚠️ Attention: TV interfaces and Android versions are constantly updated. Menu item names may differ depending on the model and year of manufacture of the device. If you do not find the described function, check the official instructions for your specific model.
The stability of wireless broadcasting is 90% dependent on the quality of the Wi-Fi signal and the absence of interference on the air, and not on the power of the smartphone itself.
Frequently asked questions (FAQ)
Is it possible to watch movies via the Internet without Wi-Fi, using only a mobile network?
Technically this is possible, but extremely inconvenient and expensive. You will need to distribute the Internet from your phone to the TV (modem mode), but then the phone will not be able to simultaneously be a video source and an access point for TV in most broadcast scenarios. It is better to use an HDMI cable or download the movie in advance.
Why does the sound lag when broadcasting video with a delay?
This phenomenon is called desynchronization. It often occurs when the Wi-Fi signal is weak or the phone's processor is overloaded when encoding the stream. Try lowering the video quality in the player settings or restarting the broadcast application.
Does the broadcast work if the phone screen is turned off?
When using Chromecast technology (via the icon in the YouTube application, etc.) - yes, the video will play. When using full screen mirroring (Miracast/Smart View) - no, since the phone must constantly render the picture to send to the TV.
How to transmit sound to an external speaker if the TV has poor speakers?
Connect the Bluetooth speaker directly to the TV through its Bluetooth settings. If the TV does not support Bluetooth, some Android applications allow you to redirect the audio stream to headphones or speakers connected to the phone, but the video will be on the TV screen.