Dolby Laboratories, Inc. engages in the provision of audio and imaging technologies. The company is headquartered in San Francisco, California and currently employs 2,336 full-time employees. The company went IPO on 2005-02-17. The firm's products are used in content creation, distribution, and playback to enhance image and sound quality, and improve transmission and playback. The company offers a developer platform, Dolby.io, that enables developers to access its technologies through application programming interfaces (APIs). Its products include digital cinema servers, playback digital film files and software, cinema processors, amplifiers, loudspeakers, 3-D glasses and kits, broadcast hardware and software. The firm's technologies include Advanced Audio Coding (AAC) and High Efficiency Advanced Audio Coding (HE-AAC) & Extended HE-AAC; Advanced Video Coding (AVC); Dolby AC-4; Dolby Atmos; Dolby Digital; Dolby Digital Plus; Dolby TrueHD; Dolby Vision; Dolby Voice; and High Efficiency Video Coding (HEVC).