Media transcoding for pervasive computing

The rapid development of wireless technologies and computer-embedded devices make it possible for people to use portable devices accessing multimedia information and service. In order to bring multimedia information and service to the various client devices while retaining the ability to go mobile, multimedia information must be adapted, which is referred to as media transcoding technology. In this paper, some related issues of media transcoding are discussed. Media transcoding techniques are classified from different perspectives. Then a general framework for media transcoding is proposed and explored. Video transcoding is discussed as the major research focus. Some methods in terms of video rate control, spatial resolution reduction, and heterogeneous video transcoding are explored.