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杜比定向逻辑环绕声(DOLBY PRO LOGIC SURROUND)是一个将4声道杜比音源编码成两声道信号再经解码还原成杜比4声道环绕声的系统即“4—2—4”。所谓定向逻辑就是利用特殊逻辑运算方法设计的方向性增强电路,突出了声源的方向性,使观众在看电视画面的同时感受到一个与画面同步的动态声场,产生一种定位准确的多维空间临场感。
DOLBY PRO LOGIC SURROUND is a 4-2-4 system that encodes a 4-channel Dolby sound source into two-channel signals that are then decoded and restored into Dolby 4-channel surround sound. The so-called directional logic is the use of special logic operations designed to enhance the direction of the circuit, highlighting the direction of the sound source, so that the audience watching TV images at the same time feel the dynamic sound field with the screen to produce a positioning accurate multi-dimensional space Presence