There is no doubt that LG (06657011) is nervous about the upcoming release of the Galaxy S 4. Samsung (005930) was able to create Apple-like buzz for its latest flagship smartphone and debuted a device last week with a number of new and unique features. One of those features, however, may infringe upon LG’s technology. According to the Yonhap News Agency, the two companies are said to be in a row over similar features in their flagship smartphones.

A day before Samsung unveiled the Galaxy S 4, LG announced a new feature called SmartVideo that utilizes eye and facial recognition technology to pause videos if a person looks away from the screen. On Thursday, Samsung announced a similar feature called Smart Pause, which LG claims may infringe upon its patents.

The company filed several eye-tracking related patents as early as 2005 and the patent related to SmartVideo technology was filed in 2009. LG plans to examine the Galaxy S 4 after it is release later next month to see if it will pursue the suit. Samsung has denied any infringement and claims that it uses its own technology for its implementation of Smart Pause.