ALEXANDRIA, Va., April 15 -- United States Patent no. 12,604,125, issued on April 14, was assigned to CISCO TECHNOLOGY INC. (San Jose, Calif.).

"Detecting active speakers using head detection" was invented by Christian Fjelleng Theien (Asker, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "Audio samples are obtained from a plurality of microphones in a conference room that includes a plurality of participants of an online communication session. A cross correlation is calculated between audio samples for each microphone pair of the plurality of microphones. For each participant, a distance between the participant and each microphone is estimated and, for each microphone pair, an expected delay between w...