Automatic content recognition
Automatic content recognition[1] (ACR) is a technology used to identify content played on a media device or presented within a media file. Devices with ACR can allow for the collection of content consumption information automatically at the screen level itself, without any user-based input or search efforts. This information may be collected for purposes such as personalized advertising, content recommendations, sale to customer data aggregators and other applications.[1][2]
https://en.wikipedia.org/wiki/Automatic_content_recognition