| 提高多媒体教室视听信噪比的措施 |
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| 引用本文： | 邓国荣.提高多媒体教室视听信噪比的措施[J].现代教育技术,2001,11(3):59-61. |
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| 作者姓名： | 邓国荣 |
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| 作者单位： | 华南师大电教系未来教育研究中心访问学者,广州,510631;龙岩师范高等专科学校现代教育技术中心,福建,龙岩,364000 |
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| 摘 要： | 多媒体教室噪声问题常常影响整个系统放声效果和图象质量 ,不能体现教学过程的最优化。确保较“干净”的电源向音视频系统供电 ;隔绝由外界噪声产生的干扰噪声 ;音视频系统的信号传输正确配接是提高线路抗干扰能力的前提 ;建立屏蔽系统和接地网络是抑制电磁噪声的最基本有效方法
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| 关 键 词： | 噪声 干扰 信号 接地网络 |
| 文章编号： | 1009-8997(2001)03-0059-03 |
Measures to Enhance the Signal-to-Noise of Multimedia Classrooms |
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| Deng Guorong.Measures to Enhance the Signal-to-Noise of Multimedia Classrooms[J].Modern Educational Technology,2001,11(3):59-61. |
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| Authors: | Deng Guorong |
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| Institution: | Deng Guorong |
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| Abstract: | The noise issue often impacts the whole effect of audio amplification and the images' quality of multimedia classroom, which can't reflect the most optimization of instructional process. In order to restraint electromagnetic noise, some steps should be taken. The most fundamentally effective method is to establish shielding system and earth connection network.. Other measurements include: isolate the interference noise produced by outside noise; ensure relatively "clean" power supply which can provide power-up to the audio and video system and guarantee the signals of the audio and video system to be transferred and attached correctly to improve the wiring's ability against interference. |
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| Keywords: | noise interference signal earth connection network |
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