四、杜比定向遇辑(Dollby Pro.logic)环绕声解码电路杜比定向逻辑(Dolby Pro.logic)以下简称“pro log-ic”(定向或专业逻辑),“Pro.logic”环绕声解码电路与普通的杜比环绕声解电路有很大的区别,后者只把编码信号进行简单的分离处理,而对C声道信号不进行处理,因此这种处理方式的声道间的隔离度很差。而“Pro.logic”环绕声解码器不但能严格地分离恢复出L、R、S、C(左、右、环、中)声道信号,保证了良好的方向感 Dolby Pro.logic surround decoding circuit Dolby Pro Logic (hereinafter referred to as “pro log-ic” (directional or professional logic), “Pro.logic” surround sound decoding Circuits and general Dolby surround sound circuit are very different, the latter only the encoded signal is a simple separation process, and the C-channel signal is not processed, so this approach between channels of isolation Very poor. The “Pro.logic” surround decoder can not only strictly separate and recover the L, R, S, C (left, right, ring, middle) channel signals, ensuring a good sense of direction