Dejittering in the transport of MPEG-2 and MPEG-4 video

When multimedia information is transported over a packet-switched network, the quality of presentation can be degraded due to network delay variation or jitter. This paper presents a dejittering scheme that can be used in the transport of MPEG-4 and MPEG-2 video to absorb any introduced network jitt er, thus preserving the presentation quality of transported media streams. The dejittering scheme is based on the statistical approximation of delay v ariation in the arrival times of video packets carrying encoded clock refer ence values and a filtering and re-stamping mechanism. In addition, a brief overview of the MPEG-4 system is presented.