| 一种视频合成方法 |
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| 引用本文： | 王雄勇.一种视频合成方法[J].国外电子元器件,2011(7):74-76. |
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| 作者姓名： | 王雄勇 |
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| 作者单位： | 华中科技大学电子与信息工程系,湖北武汉430074 |
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| 摘 要： | 为了在接口有限的CPU中传输多路视频数字信号，介绍了一种视频合成方法，通过FPGA把4路BT．656标准D1格式的视频信号合成为1路BT．656D1格式的视频信号。A／D转换以后的视频信号是标准D1格式的数字视频信号，FPGA产生读写信号控制双15／RAM读写操作，先把D1格式的数字视频信号存进双口RAM．然后分时地读取4个RAM，把每路D1格式的数字视频信号缩小为CIF格式的数字视频信号．产生1个新的遵循BT．656标准的D1格式的视频信号。实践证明，此方法能有效地完成视频合成，达到设计要求。
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| 关 键 词： | 视频合成 BT．656 FPGA 数字视频 |
A video synthetic method |
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| WANG Xiong-yong.A video synthetic method[J].International Electronic Elements,2011(7):74-76. |
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| Authors: | WANG Xiong-yong |
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| Affiliation: | WANG Xiong-yong (Electronics ＆ Information Engineering, Huazhong University of Science and Technolosy, Wuhna 430074, China) |
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| Abstract: | In order to transport multi-channel digital video signal through a CPU with limited interface, this article described a video synthetic method,which synthesized four BT.656 standard D1 video signals into one BT.656 D1 video signal through FPGA. After A/D conversion, the sampled video signal was in line with D1 format. FPGA produced read and write signal to control the double port RAM ,and wrote D1 digital video signal into double port RAM, then sharing read four RAM, reduced each D1 format digital video signal to CIF format digital video signals, and produced a new D1 format digital video signal of BT.656 standards. Practice proves that this method can effeetivly achieve the video synthetic, and attain the design demands. |
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| Keywords: | video synthetic BT 656 FPGA digital video |
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