| 视频低通滤波器及去重网络对图像信号的影响 |
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| 引用本文： | 叶海智,范晓卫.视频低通滤波器及去重网络对图像信号的影响[J].河南师范大学学报(自然科学版),2005,33(2):47-49. |
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| 作者姓名： | 叶海智 范晓卫 |
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| 作者单位： | 河南师范大学,物理与信息工程学院,河南,新乡,453007;河南师范大学,物理与信息工程学院,河南,新乡,453007 |
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| 基金项目： | 河南省教育厅资助项目(2003630344) |
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| 摘 要： | 在目前的卫星电视接收机中,由于视频处理电路大都采用同一视频低通滤波器和去重网络去接收处理不同制式的卫星电视信号,导致了信号的幅频失真和信噪比恶化,影响了图像信号的质量.本文对此进行理论分析,并提出改进措施.
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| 关 键 词： | 视频低通滤波器 去重网络 信噪比 幅频失真 |
| 文章编号： | 1000-2367(2005)02-0047-03 |
| 修稿时间： | 2004年6月15日 |
Effect of Video Lower Pass Filter and De-emphasis Network on Image Signal |
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| YE Hai-zhi,FAN Xiao-wei.Effect of Video Lower Pass Filter and De-emphasis Network on Image Signal[J].Journal of Henan Normal University(Natural Science),2005,33(2):47-49. |
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| Authors: | YE Hai-zhi FAN Xiao-wei |
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| Abstract: | Satellite television receiver is one of the most important devices for receiving satellite TV. In the current satellite television receivers, the video processing circuit receives satellite television signals of different systems on the same video lower pass filter and De-emphasis network, which leads to amplitude frequency distortion and signal-to-noise deterioration of the signals. This has affected the quality of image signals. This paper gives a theoretical analysis to this issue and puts forward improving measures. |
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| Keywords: | video lower pass filter De-emphasis network signal-to-noise amplitude frequency distortion |
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