MM1454是三菱公司开发的Q Surround虚拟处理器IC,　能够实现由Q SOUND Labs研制的音响算法。当左/右（L/　R）两个通道中采用Dollby Pro逻辑编码的立体声信号输入　到该芯片时,能产生一个背面的虚拟扬声器。这样仅仅使用　左右两个扬声器,就可以逼真地再现3D音响。对于通常的立　体声信号,MM1454使用Q Xpander技术;仍可以产生具有　纵深感和宽范围的音响效果。由于采用了有源滤波器,　MM1454仅需很少的外部元件,而且具有尺寸小、成本低的 The MM1454 is a Q Surround virtual processor IC developed by Mitsubishi that enables the implementation of sound algorithms developed by Q SOUND Labs. When left / right (L / R) channels with Dollby Pro logic encoded stereo signals are input to the chip, a backside virtual speaker can be created. This is only using the left and right speakers, you can reproduce the 3D audio realistic. For the usual stereo signals, the MM1454 uses Q Xpander technology; still produces a sense of depth and a wide range of acoustics. Thanks to the active filter, the MM1454 requires very few external components, as well as small size and low cost