A Framework of Video Format Adaptation Based on Motion Description

Due to the existence of various video coding standards in multimedia applications,it is of great significance to implement video format adaptation among these standards. This paper presents a novel framework for video format adaptation,which is based on motion description and is originated from the authors’ early work. Such motion description comprises abundant motion information,and can be obtained by pre-encoding a video sequence. Motion description can be used not only to fast generate a required bitstream,but also to guide the transcoding between different video formats. As an example,format adaptation between H.264/AVC and MPEG-2 which is on the basis of the proposed framework is illustrated in detail. A number of comparison experiments are performed to show that the proposed solution can greatly reduce the computational complexity meanwhile retain the coding efficiency,which manifestly demonstrates the proposed solution is superior to the conventional transcoding technique.