AFD高标清幅型变换信息在MXF文件的表示方法

A Method for Information Representation of Aspect Ratio Conversion between HDTV and SDTV

实现高标清同播和素材共享必须对视频进行画幅变换。在分析AFD标准的特点、MXF文件的结构与数据封装方法的基础上,提出了一种在MXF文件中嵌入采用AFD标准描述符的幅型变换信息的方法,该方法将AFD数据作为元数据,依照MXF文件中元数据的扩展规范,实现了画幅变换信息与素材数据的绑定。

Aspect Ratio Conversion is necessary to achieve HDTV and SDTV simulcast and material sharing. In this paper, based on the analysis of the characteristics of the AFD standard, the MXF file structure and data encapsulation method, a method for embedding aspect ratio conversion information which accords with AFD standard is put forward. In accordance with the MXF file metadata extension specification, the aspect ratio conversion between HDTV and SDTV and the information of the conversion and material data binding are a- chieved by the method.