What is Chromecast?

In today's fast-paced digital world, streaming has become the standard. For those without a smart TV, Chromecast offers a perfect solution. But what exactly is Chromecast and how does it work?

This groundbreaking device, created by Google, has changed the way we stream media, easily converting any regular TV into a smart TV. Chromecast enables users to cast videos, music, and apps from their smartphones or computers straight to their TVs, delivering a smooth and intuitive viewing experience.

By utilizing the power of a Wi-Fi network, it eliminates the need for complicated setup procedures or extra hardware, representing the pinnacle of ease in the streaming world. Whether you're aiming to upgrade your home entertainment setup or simply want to watch your favorite media on a bigger screen, understanding how Chromecast works and its advantages is the essential starting point.

The Introduction of Google Chromecast Devices

Introduced in 2013, Google Chromecast is a range of devices that connect to your TV's HDMI port. HDMI stands for High-Definition Multimedia Interface. Once set up, it enables you to stream video and audio from an iOS or Android device or from the Chrome web browser.

Currently, two versions of Chromecast are available. Both offer the basic casting functionality, but the newer Chromecast with Google TV features its own operating system, allowing you to run streaming media apps and other features without needing a smartphone or another device. In the U.S., the Chromecast is priced at $29.99, and the Chromecast with Google TV costs $49.99. Google also offers a bundle that includes the Chromecast with Google TV and six months of Netflix for $89.99.

When you cast media to your TV using Chromecast, your phone, tablet, laptop, or desktop serves as both the starting point for the content and the remote control to manage what you view and hear on your television. You simply download the Google Cast app and navigate through your preferred streaming services. However, the Chromecast with Google TV is the first model to come with its own remote, making it easier to choose what to watch.

Chromecast Technical Specifications

While the original Chromecast resembled a bulbous flash drive, the third-generation model is now shaped like a disc, with a permanently attached cord that plugs into your TV. Measuring 6.4 inches (162 millimeters) in length, including the cord, the device itself has a diameter of 2 inches (51.8 millimeters) and a thickness of 0.5 inches (13.8 millimeters). It features an HDMI connector and a micro USB port for power. It is available in two colors: chalk and charcoal.

The Chromecast with Google TV has a similar design, though it is oval-shaped. It measures 6.4 inches (162 millimeters) in length, 2.4 inches (61 millimeters) in width, and 0.5 inches (12.5 millimeters) in thickness. Available in three colors—snow, sunrise, and sky—the remote is color-coordinated and includes voice control in addition to physical buttons. Like its counterpart, it has an HDMI connector for the TV, but it uses a USB-C connection for power instead of micro USB.

While the specifications for both devices are comparable, the Chromecast with Google TV requires additional storage for apps. It comes with 8GB of flash storage, but the operating system occupies around 3GB, leaving only around half of the storage available for user apps.

The third-generation Chromecast supports 1080p resolution with a 60 frames-per-second refresh rate. The Chromecast with Google TV, on the other hand, can handle 4K HDR video with a 60 frames-per-second refresh rate. It also offers additional features, including a voice remote with Google Assistant, the ability to play games on Google Stadia, and smart-home device control, all of which the basic Chromecast lacks.

Chromecast is compatible with the following operating systems, although some features may still function on older versions in certain cases:

How Chromecast Streams to Your TV

Chromecast transfers content to your TV screen from a remote device using a protocol called DIAL (Discovery And Launch). DIAL was created by Netflix and YouTube, both of which are owned by Google. This protocol is open for anyone to use and is found in devices and apps from various manufacturers and content providers.

One component of Chromecast, the DIAL Service Discovery protocol, relies on Simple Service Discovery Protocol (SSDP) version 1.1, as defined by UPnP (Universal Plug and Play), to enable a DIAL client device to find a DIAL server device within the same network. The second part, the DIAL REST (representational state transfer) Service, is used to send HTTP (hypertext transfer protocol) requests from the client to the server device to query, launch, or stop applications. In Chromecast's case, your phone, tablet, or computer acts as the client, while the Chromecast itself serves as the server.

Google developed the Google Cast screen-sharing technology to enhance the capabilities of DIAL, offering much more functionality. It created the Google Cast SDK (software development kit) to allow third-party developers to integrate related features into their apps that can stream media to Chromecast. Google also provides Cast APIs for each supported operating system. This setup enables features like pausing, volume control, and additional functionality that app developers can choose to implement.

The basic Chromecast operates a simplified version of the Chrome browser. The device's apps are web-based, designed to receive and respond to HTTP requests. Once an app is launched, it runs on the Chromecast, but a communication channel remains open, allowing the client device to function as a remote control. This means you can power off your mobile device without interrupting the content streaming from Chromecast to your TV.

To set up Chromecast, you need the Google Home app on your mobile device or the Google Chrome web browser on a computer. After setting up Chromecast, you use third-party apps like Netflix, YouTube, or the Chrome browser to launch and control your content.

While there are other apps that allow set-top boxes like gaming consoles to use a smartphone or tablet as a remote, these require both the app on the set-top box and the app on the mobile device to be launched and run simultaneously. Chromecast (via DIAL) simplifies this process by enabling app launch and control from a single device, allowing playback on your TV through the Chromecast. This could be a glimpse into the future of more straightforward living room remote controls.

The Chromecast with Google TV operates on the Android TV system, as opposed to a modified Chrome browser. It supports numerous Android apps from the Google Play Store, including top streaming services. While you can cast media from your phone or computer to the device, the Chromecast with Google TV is capable of running apps independently. Google TV is an interface layered over the Android TV system, integrating Google Assistant, Google Knowledge Graph, and machine learning capabilities.

Which Services Are Compatible With Chromecast?

When Chromecast first launched, it only supported a few services like Netflix and YouTube. However, over time, a wide range of services have been integrated, spanning video, music, news, media storage, sharing apps, productivity tools, and games. Many of these require paid subscriptions to third-party providers.

Neither the standard Chromecast nor the Chromecast with Google TV needs a special app to cast content. Instead, developers use Google's Software Development Kit (SDK) to add compatibility directly into their apps. Casting requires a Wi-Fi connection, and Google advises that both the device and Chromecast must be on the same network if you have multiple Wi-Fi networks in your home.

This also applies when you're streaming from the Chrome browser directly to your TV.

How to Set Up Chromecast

If you've got a WiFi network, a compatible device connected to it, and access to streaming services supported by Chromecast, the next step is acquiring one and following a few simple setup steps. You'll need your WiFi password for the process.

In some cases, you may need to adjust settings on your WiFi router, and there's a chance that your router could be incompatible with Chromecast. Google's support site features a compatibility page for Chromecast, listing routers that work well with the device, along with firmware versions, potential solutions to known issues, and contact details for router manufacturers.

Next, plug the USB power cable into the Chromecast, connect the adapter to a power source, and insert the HDMI connector into an available port on your TV. Turn on the TV and switch the input to the Chromecast to see the display. You’ll find information on the screen to help you complete the setup using the free Google Home app on your phone. Setting up the Chromecast with Google TV follows a similar process, though it doesn’t need the Google Home app.

For third-generation Chromecast owners, the Google Home app will guide you through the remaining steps. For Chromecast with Google TV, the Home app will display a QR code, which you can scan with your phone to proceed.

Once connected to WiFi, your Chromecast will likely perform an automatic update to install the latest software, which may take a few minutes. Whenever new software is available, the device will download and install it on its own, even if setup is not being performed at the moment.

After completing all of these steps and ensuring there are no connectivity issues, your mobile device or computer should be set to stream content to your TV through Chromecast. The next step is to launch an app and start casting your media.

What You Can Do With Chromecast

To stream with Chromecast on your mobile device, ensure you're connected to WiFi and open a compatible app like Netflix, YouTube, Hulu, or Pandora. Apps built using the Chromecast SDK feature a cast icon. Tapping this icon opens the cast menu. The icon may appear immediately after launching the app or once you've selected media to stream. After selecting the icon, you can choose your Chromecast from the menu (if you have multiple devices, you may also see options for Google speakers). Your media should soon start playing on your TV.

To cast a specific browser tab, click the three-dot menu in the upper-right corner of your Chrome window. From there, select the 'Cast' option. If you have multiple Google devices, you can choose which Chromecast to use.

Casting is currently limited to certain video sites in Chrome. However, Chrome offers even more possibilities. Through the same Cast menu, you can stream media files from your computer or even cast your entire computer screen.

Casting video from a Chrome tab supports a maximum resolution of 720p, while videos streamed from supported sites can go up to 1080p. Chromecast-friendly sites may also deliver 5.1 surround sound. Sites that are compatible with Chromecast play content directly on the device, using fewer resources from your computer. You can even close your laptop's lid while the video continues to stream.

Streaming is usually controlled from your mobile device through a volume slider, a scrub bar (which allows you to navigate forward and backward through media), and play, pause, and stop buttons on the screen. Some apps may offer additional controls. Keep in mind that the volume displayed is specific to Chromecast, so you might need to adjust the TV’s volume using its remote to get your desired sound level. If you’re using an Android device, you can also manage streaming directly from the lock screen or the notification bar.

You can easily exit the control screen, browse through the app, switch to other apps, let your device go into sleep mode, or even turn it off without interrupting your media playback. Your content will continue streaming to the TV through Chromecast.

While casting a video with Chromecast, if you pick another video from the same app, it will typically start playing on the TV. However, if you open a different app and start playing a new video on your mobile or computer, the original video will continue on the TV unless you select the cast icon in the new app, which will take over the TV. If you need to resume control of the ongoing stream, you can go back to the original app, where a 'Now Playing' bar or similar control should appear to help you access the video’s controls.

The Chromecast with Google TV comes with its own remote, which allows you to control certain TV functions like volume and power. Additionally, you may be able to use your TV's remote through the HDMI Consumer Electronics Control (HDMI-CEC) protocol. However, the Chromecast only supports a limited range of features through HDMI-CEC connections.

You can use multiple devices to stream content to your Chromecast, as long as they are connected to the same WiFi network and have the necessary apps installed. This means your phone, tablet, computer, or even the devices of guests can all be used to launch content. While this opens up the possibility of TV control battles, it also allows for some fun social streaming where everyone can contribute their videos or music.

Comparison with Competitors

There are several other ways to stream content to your TV, such as through gaming consoles, DVRs, and Blu-ray players. If you already have one of these devices and are comfortable using regular remote controls (or are willing to purchase a universal remote), you may not need a separate device. However, if you're looking for a dedicated streaming solution, Chromecast is just one of the many options available to you.

Roku stands as one of the major competitors to Chromecast. As of mid-2021, it offers four models ranging from $30 to $100. The lower-end Roku Express and Express+ support streaming up to 1080p, while the higher-end models support 4k streaming. All models include Wi-Fi, with the Roku Ultra LT and Roku Ultra also offering Ethernet ports for more stable connections. Roku offers many of the same streaming channels as Chromecast, but also has its own channel now. Unlike Chromecast, Roku devices come with remotes and don’t require a tablet or smartphone for control. However, an app is available if you wish to use your mobile device as a remote. Roku also uses the DIAL protocol in its devices.

The Apple TV 4K starts at $179 and shares similarities with Roku and Chromecast with Google TV, offering the ability to run a wide variety of iPhone and iPad apps. You can also cast media to the Apple TV. As of this writing, Apple still offers the Apple TV HD at $149. Both Apple TV models run tvOS, with the primary distinction being screen resolution. It supports streaming to other devices, but not to Chromecasts.

Miracast is not a device, but rather a software standard that establishes a direct Wi-Fi connection between the casting device and the receiving device, functioning peer-to-peer. Since it doesn't rely on the internet, Miracast operates without an internet connection. Developed by the Wi-Fi Alliance, Miracast technology is incorporated in devices from various manufacturers.

Critical Reception and Future Prospects

Since its release in July 2013, the Chromecast has been a big hit. It sold out quickly, with a Netflix promotion offering three free months of service running out in just a few hours after launch. The device then faced backorders for up to three months for some customers. By the end of 2013, it became widely available at retailers.

Critics have lauded the Chromecast for its affordability, easy setup, and smooth functionality with supported apps. Additionally, its compact design makes it easy to hide behind your TV. However, it does require a power cable, which can make it a slightly cumbersome addition to your entertainment setup, especially as other devices have become smaller, sleeker, and eventually integrated directly into smart TVs.

The quality of your Chromecast streaming can be influenced by the strength of your WiFi network. Some users report a slight delay of a few seconds between casting media and its actual playback. If your device isn't running a compatible operating system or if you lack a compatible router, you'll be unable to use the Chromecast altogether.

Since any compatible device on the same network can control any Chromecast connected to it, multiple devices can interfere with one another. The most recent device attempting to cast media or a tab to the Chromecast will take priority. This usually isn't a big issue on a home network, unless someone unintentionally casts something they’d prefer others not to see—or if you happen to live with someone inconsiderate.