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凡玩音响或家庭影院的朋友随着烧度的增加,不可避免地会遇到光纤(OPTICAL)、同轴(COAXIAL)、AC-3 RF 这三个信号源输出端子的问题。可以说这三个端子乃是踏入 AV 殿堂的基础。搞懂这三个端子,首先应先通晓激光影碟机和激光唱机的工作原理。记录在 LD 影碟上的音频信息有左、右声道模拟信号和左、右声道数字信号,而普通 CD唱盘上仅记录左、右声道数字信号。在影碟机中经激光头读解出的 RF 信号包含有:用 EFM 方式调制的数字音频信号(0～2MHz);调制有左声道音频的FM 调频信号(2.3MHz);调制有
Anyone who plays audio or home theater will inevitably encounter the problem of output terminals of the three signal sources of OPTICAL, COAXIAL and AC-3 RF as the degree of firing increases. It can be said that these three terminals are the cornerstone of AV Palace. Understand these three terminals, first of all we should first understand the working principle of laser DVD players and CD players. The audio information recorded on the LD disc has left and right channel analog signals and left and right channel digital signals, whereas normal CD discs record only the left and right channel digital signals. The RF signals read by the laser head in a DVD player include: a digital audio signal (0~2 MHz) modulated by EFM; an FM frequency modulation signal (2.3 MHz) modulated by left channel audio; a modulation