Where is Dolby pro logic ranked in the world?

Sixth. British Dolby Company invented the multi-channel stereo system (Dolby pro logic for short), ranking sixth in the world. Dolby is listed in the Fortune Global 500. Dolby Laboratories in the United States invented Dolby noise reduction system, Dolby surround system and many other technologies, which had a great impact on movie audio and home audio. Dolby technology often used in families mainly includes Dolby noise reduction system and Dolby surround system.