The major TV manufacturers use their devices to collect data on viewers’ viewing behavior. The technology behind this is called Automatic Content Recognition (ACR). The televisions generate hash values at regular intervals from the visible and audible content that is currently running on the sets. These values are also known as fingerprints.

A study by universities in England, Spain, and California has analyzed these data collections on Samsung and LG devices in particular. However, this does not mean that other manufacturers do not do the same. Samsung even uses its data collection to attract advertising customers and refers to it as Samsung Ads on its website.

According to the information there, Samsung televisions take a screenshot of the current image every 500 milliseconds. LG mode

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