Your Smart TV Takes Screenshots Every 15 Seconds and Sends Them to Manufacturer Servers — Study Confirms

A peer-reviewed study has confirmed that smart TVs from major manufacturers routinely capture and transmit visual data from your screen, with LG devices doing so every 15 seconds and Samsung devices every 60 seconds, raising significant privacy concerns about automatic content recognition technology.

The research, conducted by scientists from University College London, UC Davis, and Universidad Carlos III de Madrid, analyzed network traffic from smart televisions and found that Automatic Content Recognition (ACR) systems generate digital fingerprints of on-screen content and send them to corporate servers to identify what users are watching in real time.

According to the study, LG televisions dispatch data to ACR servers every 15 seconds, while Samsung TVs transmit snapshots every 60 seconds. This interval-based capture occurs regardless of the content source, meaning the technology monitors not only streaming apps but also external devices connected via HDMI, such as gaming consoles, laptops during video calls, or USB drives playing home media.

The most unsettling finding? ACR doesn’t care if you’re using the TV’s native apps. ACR network traffic exists when watching linear TV and when using the smart TV as an external display using HDMI.

Researchers from UC Davis, UCL, and UC3M

In other words that even when users are not accessing built-in smart TV features, the television continues to monitor and report whatever is displayed on the screen, treating all visual input as data worth collecting for profiling and advertising purposes.

How ACR Works and Why It’s Enabled by Default

Automatic Content Recognition functions similarly to audio recognition services like Shazam but for visual content. The TV takes periodic screenshots, creates a unique digital fingerprint from the image, and compares it against a database to identify the program, movie, or game being displayed. The resulting data is then transmitted to manufacturer-operated servers for analysis and potential monetization.

LG’s ad business generated nearly $700 million in 2024 alone. Similarly, Vizio reported that its data and advertising revenue officially surpassed its hardware profit in 2023.

Official annual results cited in the study

The study highlights that ACR is typically enabled by default during initial TV setup, with consent obtained through lengthy terms and conditions that users often accept without reading. Opting out requires navigating multiple settings menus, a process manufacturers have little incentive to simplify, given the financial value of the collected viewing data.

As noted by Dr. Anna Maria Mandalari from University College London, the average user is unlikely to understand what ACR is or that they can disable it, allowing manufacturers to gather detailed behavioral data under the guise of improving user experience.

Privacy Implications and User Risks

Because ACR systems do not distinguish between content types, they can capture sensitive information from sources users reasonably expect to be private. This includes video conferencing sessions on laptops, gameplay from consoles, or personal media played from external drives — all of which may be fingerprinted and transmitted without the user’s explicit awareness or ongoing consent.

The TV doesn’t distinguish between Netflix and a private Zoom meeting. It just captures, fingerprints, and phones home.

Research findings summarized in the study

This continuous monitoring creates a scenario where a consumer electronics device functions as an ongoing surveillance tool for its manufacturer, blurring the line between entertainment hardware and data collection apparatus. The practice has drawn criticism from privacy advocates who argue that such surveillance should require explicit, granular opt-in consent rather than being buried in setup workflows.

What Users Can Do

While the study does not provide model-specific opt-out instructions, it confirms that disabling ACR is possible through the television’s settings menu, typically under privacy, advertising, or smart features sections. Users are advised to consult their device’s manual or manufacturer support pages for exact steps, as the location and labeling of these controls vary by brand and model.

Until stronger regulatory frameworks or industry standards emerge to limit default data collection, experts recommend that consumers proactively review their smart TV’s privacy settings shortly after setup and periodically thereafter to ensure ACR remains disabled if desired.