Amazon.com Inc is teaming up with Samsung Electronics Co Ltd and major media corporations including Warner Bros and Lionsgate to popularize 4K ultra high-definition television. Amazon, whose Instant Video service serves up thousands of movies and TV programs in direct competition with Neflix Inc, did not outline specifics on their collaboration in a Monday announcement. But Samsung and other consumer electronics makers are hoping that 4K TV – so-called because they are said to offer four times the resolution of conventional high-definition images – will take off as a format and recharge sales. At the Consumer Electronics Show in Las Vegas, the South Korean tech giant said in a separate statement it also will work with other content distributors, including Netflix and cable operators Comcast and DirecTV, on promoting 4K TV.