1756-EWEB模块

标清的采集卡已经逐渐的不在符合每个领域的要求,高清采集卡采用率逐渐普及,一般高清采集卡都会具备色差、AV、S端子等输入有些还有有HDMI等数字接口,高分辨率达到1920×1080，大大满足各种高清摄像机的需求。可采集从高清 720P，1080i到标清480i/480P多种分辨率讯源,好的高清采集卡可以得到全分辨率高清无压缩视频采集，可以确保从高清素材输出生成的高清节目完全保留了原始的图像质量。

在软件兼容性及编解码质量和系统稳定性方面也是测试一块高清采集卡是否好的标志。另外还有是否支持标准的DIRECT SHOW API进行开发的第三方软件及开发工具,是否提供SDK二次开发包，兼容于多种常见的非编软件，如Adobe Premiere pro等。很多采集卡厂商如圆刚等老牌的采集卡厂家家都纷纷出了高性价比的高清采集卡,降低了全分辨率实 况高清制作的门槛，在日见兴起的高清采集领域如教育录播，网络视频会议及远程培训，高清医疗，特技展台等多媒体高清视频采集方面被广泛应用。

高清采集和显示设备的逐渐普及，尤其是高清摄像机和大屏显示设备的大量使用，采集设备和显示设备刷新频率不一致的问题显得越来越严重。在显示器市场中LCD占据主流地位。由于LCD屏幕具有保持显示特性(图像在每帧显示时间内一直保持特定亮度)，与人眼的视觉暂留特征相综合，当画面较大、刷新率不高时会导致观看动态画面存在跃动感，造成动态物体解析度下降和引发视觉疲劳。对于视频监控类应用，视频采集设备的采集帧率一般是每秒25帧或30帧，而显示设备的主流刷新频率则是50Hz或60Hz，采集设备。视频领域的迅猛发展，视频采集卡在各行各业得到广泛的应用，高清采集卡逐步取代标清采集卡，这已经成为市场发展的潮流趋势之所在。

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