高效视频编码环境帧内块拷贝技术研究

Research on the Technology of Intra-block Copy of the High Efficiency Video Encoding

国际标准化组织推出新一代高效视频编码标准以来,随着视频处理需求的迅猛发展,云处理技术的日渐推广,终端设备的图形化界面也日渐成为多媒体传输不可或缺的重要内容,促进了屏幕内容编码技术的发展。终端设备产生的屏幕视频既包括自然图像,也含有文字、图表等人造内容,往往由于自身的纹理及其边缘有着比较特殊的特点而难以使用现存的帧内预测模式进行预测。JCT-VC引入的帧内块拷贝技术(intra block copy—intra BC),利用一幅图片帧内文字、图片之间很强的相关性进行预测,从而大大提高了视频编码质量。

After a new generation of highly efficient video encoding standards was introduced by International Standards Organization, with the rapid development of requirements of video processing, the increasing popularization of cloud processing technology, the graphical interface of terminal equipment has become an increasing important content of multimedia transmission, which directly led to the development of the screen content encoding technology. The screen video produced by the terminal equipment includes natural images as well as text, graphics, and other man-made content, which is often difficult to use the existing intra prediction model to the predict the content, because of the existing frame＇s texture and edge＇s feature. The intra block copy—intra BC introduced by the JCT-VC use the strong correlation between the text and images in a picture frame, thus greatly improves the quality of video encoding.