The Dolby Digital system became well known in the 80s, within the world of audio tapes. It was developed by the American company Dolby, which created several procedures to achieve noise reduction in analog recordings, evolving into today’s surround sound.
Dolby is operational in any scenario where there is sound of any kind, including laptops, video games or smartphones. Simply put, the amplifier used must have Dolby technologies installed, along with a speaker that has surround sound. Let’s take a look at the most important techniques within this brand’s technologies:
- Dolby Surround. Surround sound system designed for the home, encoding four stereo sound channels into two channels.
- Dolby Stereo. Controls multichannel sound in movie theaters.
- Dolby True HD. Designed for Blu-ray movies, avoiding compression in Blu-ray movies.
- Dolby Digital (AC3). It is used within the Home Cinema system, and presents the first multichannel audio system.
- Dolby Atmos. Only several cinemas have it, and it is a new technique that allows a maximum of 128 audio tracks.