Google researchers have developed technology that lets computers listen to TVs. The idea is to give PCs the ability to understand what is being viewed on a nearby TV so those watching television can be provided with related content, automatically, on their monitors. 
Google researchers are calling the technology “mass personalization.” In addition to providing TV-related content, the technology might also be used for advertising purposes or to monitor social-networking sites for viewers watching the same show……………..More At……