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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=61" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">可见光屏幕通信技术 </h1> <p class="xg1"> 时间：2021-10-25 09:13<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1998)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=9317&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a>来自: 网络平台</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=61" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>可见光屏幕通信是 OCC 技术的一个分支，其发射端主要是由数字屏幕构成，其融合了可见光通信技术和光感知技术的特性，通信系统的抗干扰能力很强，且因为接收设备一般是基于图像传感器的光学镜头，数字显示屏到光学镜 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 可见光屏幕<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">通信</a>是 OCC 技术的一个分支，其发射端主要是由数字屏幕构成，其融合了可见<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">光通信</a>技术和光感知技术的特性，通信系统的抗干扰能力很强，且因为接收设备一般是基于图像<a href="http://sensor.oecr.com" target="_blank" class="relatedlink">传感</a>器的光学镜头，数字<a href="http://display.oecr.com" target="_blank" class="relatedlink">显示</a>屏到光学镜头的通信链路易于控制，具有较大的接收视场角、设备对准简单等优点，在面向移动端无线光通信领域有很好的前景。</div><div><br></div><div> 常见的可见光屏幕通信技术的调制模式分为两种。</div><div><br></div><div> 一种是编码可视模式，将数据流编码成连续的二维码，然后在发射端的数字屏幕上显示。这种方式直接能看到屏幕上呈现的数据码元。</div><div><br></div><div> 另一种模式为编码不可视的方式，将二进制比特序列在部分图像中嵌入数据，可见光屏幕通信技术充分利用了可见光信道，将二进制比特序列以像素块的形式调制到 LED 屏幕上，这种携信编码模式能够将信息转换成可读的图像帧通过相机接收。这种模式如同在传输图像中加入水印。这样做是为了使人眼对图像或动画中内嵌信息的像素部分感知实现MIN化。</div><div><br></div><div> 通常可见光屏幕通信的特点可被概括如下：</div><div><br></div><div> （1）安全性高：光传输具有一定的方向性，发送端的光学屏幕可视距离有限，一般仅限于室内环境。室内的可见光不能穿透墙壁等遮挡物，将数据传输严格限制在室内，即用户的视距范围内。而且，无论商业屏幕(如手机屏幕、电视屏幕、计算机显示器等)支持何种刷新率，人眼都直接无法感知这些信息。</div><div><br></div><div> （2）易于操作、实现较简单：不需要额外的匹配，能够自动进行同步和通信，可见光屏幕系统初的诞生是应用于计算能力有限的相机设备(如智能手机摄像头)，其成本低，使用较灵活。因此，需要设计一个结构简单、复杂度较低的通信系统，保证接收单元能够正确读取到发送端的光学信号即可实现通信。</div><div><br></div><div><div 0px;"="" 255);"="" 255,="" rgb(255,="" simsun;="" yahei",="" microsoft="" style="overflow-wrap: normal; color: rgb(143, 143, 143); text-indent: 28px; font-family: 微软雅黑; background-color: rgb(255, 255, 255);"><span style="overflow-wrap: normal;">免责声明：编写或转载此文是为了传递更多的信息，为光电行业尽一些绵薄之力。若文字或图片侵犯了您的合法权益或有不当之处，请作者在20个工作日之内与我们联系，我们将协调给予处理。</span></div><div 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