作为对视频转换编码及码率控制研究的基础，本文首先介绍了几种主要的视频编码标准。
As the basis of the following research on transcoding and rate control, several related video coding standards are introduced in this thesis first.
本文着重介绍了视频采集技术的实施，及以PC机为硬件环境的视频采集卡的主要功能和技术指标。
This article emphatically introduced the video capture technology implementation and the main function and the technical specification taking PC machine as hardware environment video capture card.
本文首先介绍了视频水印的概念、主要应用领域、主要特征、分类以及视频水印研究的技术难点。
This paper introduces video concept, main apply domain, main characteristic, classification and technological difficult point of video watermark at first.
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