Your TV is Watching You: How to Stop Smart TVs From Tracking Your Viewing Habits

Smart TVs have develop into ubiquitous in modern homes, offering a gateway to streaming services and a connected entertainment experience. However, this convenience comes at a cost: many smart TVs actively track what you watch, not just through streaming apps, but also through devices connected via HDMI. This data collection is used for targeted advertising and content recommendations, raising privacy concerns for many users. Fortunately, there are steps you can take to regain control of your viewing data and protect your privacy.

How HDMI Content Tracking Works

Smart TVs employ two primary methods to monitor your viewing habits, even when using HDMI-connected devices:

• HDMI-CEC Metadata: When you connect a device like a game console or Blu-ray player, it sends a device ID to your TV via HDMI-CEC (Consumer Electronics Control). This allows a single remote to control multiple devices, but also tracks device usage patterns, such as how long a particular input is used.
• Automatic Content Recognition (ACR): This more intrusive method involves the TV taking “fingerprint screenshots” of each pixel on the screen to identify the content being displayed, regardless of the source. Researchers at the University of California, Davis, have found that ACR tracking occurs even when the TV is used as a simple display.

How to Stop TV Tracking

Here’s how to disable the most common tracking features on your smart TV:

Disable ACR

Disabling Automatic Content Recognition is the most impactful step you can take. The location of this setting varies by manufacturer, so you may necessitate to navigate through the Terms and Conditions or Privacy Policy. Here’s where to look on popular brands:

• Samsung: Viewing Information Services
• LG: Live Plus
• Vizio: Viewing Data
• Sony/Google TV: Help & Feedback or Usage & Diagnostics
• TCL/Roku TV: Smart TV Experience
• Hisense: Smart TV Experience or Viewing Information Services
• Fire TV: Automatic Content Recognition

Turn Off HDMI-CEC

Disabling HDMI-CEC limits data exchange between your TV and connected devices. While this may require using multiple remotes, it further reduces tracking. Here’s where to find the setting:

• Samsung: Settings > Connection > External Device manager > Anynet+
• LG: Settings > General (or Connection) > Device Connection Settings (or External Devices) > SimpLink
• Vizio: Menu > All Settings > System > CEC
• Sony: Settings > Channels & Inputs > External Inputs > Bravia Sync
• TCL: Settings > Channels & Inputs > Inputs > Control Other Devices (CEC)
• Hisense: Settings > System/Connection > HDMI & CEC
• Fire TV: Settings > Display & Sounds > HDMI CEC Device Control
• Roku TV: Settings > System > Control Other Devices
• Google TV: Settings > Display & Sound > HDMI CEC

Use an HDMI CEC-less Adapter

For a hardware-based solution, consider an HDMI CEC blocker. These adapters connect between your TV and HDMI device, preventing the transmission of CEC data without affecting video or audio quality. Brands like BlueRigger offer these adapters.

Disconnect from the Internet or Use a VPN

The most secure option is to disconnect your TV and devices from the internet. This prevents data from being sent to the manufacturer. Alternatively, using a Virtual Private Network (VPN) can mask your IP address and encrypt your internet traffic, adding a layer of privacy.

Potential Trade-offs

Disabling these features may affect certain smart TV functionalities, such as voice commands or search features. It’s also important to periodically check your TV’s settings after firmware updates, as these updates may reset your privacy preferences.

While it may take time to see the full benefits of blocking data collection, taking these steps is a proactive way to protect your privacy and enjoy your media without being constantly monitored.