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文中提出一种包含堅直方向半个空間的三維声重发系統。在已知的各种立体声系統中,所需的最少信息或者传输(或記录)通路数目N应該較重发維数n多1,即N=n+1例如,在两維平面的全景声重发系統或者三維空間環繞声系統中,其所需的最少信息分别是三个或者四个。但是,在这种新的系統中,声音的重发已扩展到三維空間的上半部份(实际上听感中也常常只有上半部份),而其所用的信息却仍然只是三个;因此,新系统的結构就較已知的三維空間环繞声系統簡单,在无线电广播中,其信号噪声比的恶化也就較轻。另一方面,新系統又能传送四通路全景声系統所不能传送的竖直方向感觉,其所需用的信号通路数目却与全景声系統一样只有三个而不需另外增添。最后还需指出,这种新系統与目前已知或者已通行的四通路全景声系統,双通路立体声系统和普通单通路重发系統都能兼容。
In this paper, we propose a three-dimensional acoustical gravity retransmission system that contains a half-space in the vertical direction. In known stereo systems, the minimum amount of information required or the number of transmission (or recording) paths, N, should be re-issued with dimension n multiplied by 1, ie N = n + 1 For example, Acoustic retransmission system or three-dimensional surround sound system, the minimum required information is three or four. However, in this new system, the sound retransmission has been extended to the upper half of the three-dimensional space (in fact, often only the upper half of the sense of hearing), but its use of information is still only three; As a result, the new system is simpler in structure than the known three-dimensional surround sound system, and its signal-to-noise ratio deteriorates less on radio. On the other hand, the new system can transmit the vertical sense of direction that can not be transmitted by the four-channel panoramic sound system, requiring only as many signal paths as the panoramic sound system without additional additions. Finally, it should be pointed out that this new system is compatible with four-channel panoramic sound systems, two-channel stereo systems and common single-path retransmission systems that are currently known or already in use.