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社比AC－3概要自杜比环绕声（Dolbystereooptical4ch）首次应用于电影后，已成为最受欢迎的多声道立体声系统之一，用于家庭的杜比环绕声（DolbySurround3ch）和杜比定向逻辑环绕声（DolbySurroundPro-Logic，4ch）更能享受电影院的环绕声效果。1992年杜比公司又开发了最新一代
Social Ratio AC-3 Summary Since Dolby Surround 4 (Dolby Surround 4ch) was first applied to movies, it has become one of the most popular multi-channel stereo systems for home Dolby Surround 3ch and Dolby Pro Logic Surround Sound (Dolby Surround Pro-Logic, 4ch) Enjoy the cinematic surround sound better. 1992, Dolby has developed the latest generation