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AHD车载录像机概念

2018年10月24日

什么是AHD£¬AHD车载录像机又有什么优点呢£¿首先£¬我们来区别一下AHD和传统录像机


一¡¢AHD和传统模拟监控画?#26159;?#21035;

  普遍意义上£¬AHD是American Heritage Dictionary的缩写£¬即美国传统词典音标£¬这一释义用的较多¡£而从安防的角度来解释£¬AHD代表的则是Analog High Definition¡£
  Analog High Definition意思为模拟高解析度¡£关于High Definition£¬简单来说£¬我们通常会把物理分辨率达到720p以?#31995;?#26684;式则称作为高清£¬简称HD¡£其指的画面垂直解析度为1080i¡¢720p或1080p¡£1080i就是指解析度为1920×1080£¬采交错扫描£¬每秒呈现30个完整画面£»720p就是指解析度达1280×720£¬采循序逐行扫描£¬每秒呈现60个完整画面£»1080p就是指解析度达1920×1080£¬采循序扫描£¬每秒呈现60个完整画面¡£而AHD是基于AHD协议£¬采用模拟同轴电缆传输逐行扫描的高清视频¡£


二¡¢AHD和传统模拟监控传输区别
  AHD跟传统设备一样操作简单方便£¬用普通75-3类同轴线便可进行远达500米高清无损传输£¬突破了高清视频现有传输技术的传输极限£¬能实现?#32479;?#26412;¡¢长距离¡¢无延时¡¢高效率¡¢抗干扰且易实施的百万像素级高清视频传输¡£


三¡¢AHD 录像机3G/4G无线传输
  在3G和4G传输过程中£¬根据?#23548;?#20256;输效率自动调整对应的码率¡£所以在传输方面AHD主机比传统模拟主机更清晰¡£

来源£º深圳龙安天下电子有限公司
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