Dolby Laboratories, Inc. designs and manufactures audio and imaging products for the cinema, television, broadcast and entertainment industries. Its products for cinema include Digital Cinema Servers and Cinema Audio Products, and broadcast and other include Dolby Conference Phone and Other Products. It offers services to support theatrical and television production for cinema exhibition, broadcast and home entertainment, including equipment training and maintenance, mixing room alignment and equalization, as well as audio, color and light image calibration. Its technologies include Advanced Audio Coding and High Efficiency Advanced Audio Coding, Dolby AC-4, Dolby Atmos, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, Dolby Vision, Dolby Voice and High Efficiency Video Coding. It distributes its products in over 80 countries. Its technologies are incorporated in offerings in various end markets, such as the broadcast, Personal Computer, mobile, consumer electronics and other markets.