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本文应用了环绕声场重发中的声像定位公式,普遍地探讨了(包括左、右对称和不对称)二个传输通路的矩阵型立体声系统。证明了它们重发时都不可能获得一个无声像位置畸变的平面环绕声场,因而肯定了一切4-2-4矩阵型立体声系统都不是完美的平面环绕声系统。 文中也指出采用三个传输通路的立体声系统能够在重发时产生无声像位置畸变的平面环绕声场,着重指出,三个独立传输信号的形式不是唯一的,给出了任意两组独立传输信号和所对应的两个不同的译码矩阵的变换关系。文中最后指出了选择独立传输信号形式时所应注意的问题。
In this paper, the sound image localization method in the re-transmission of the surround sound field is applied. The matrix type stereo system of two transmission paths (including left and right symmetry and asymmetry) is generally discussed. It is proved that it is impossible to obtain a plane-like sound field with no distortion like position distortion when they are reissued, so it is affirmed that all 4-2-4 matrix type stereo systems are not perfect planar surround sound systems. It is also pointed out that a stereo system using three transmission paths can generate a flat surround sound field with no sound like position distortion upon retransmission. It is emphasized that the form of the three independent transmission signals is not unique, and any two independent sets of transmission signals and Corresponding to the transformation of two different decoding matrix. Finally, the article points out the problems that should be noticed when choosing the independent transmission signal form.