Quality of service for MPEG video in human perspective

Document Type

Conference Proceeding

Publication Date

2007

Keywords

MPEG video, Quality of service

Abstract

Advancement and development in multimedia and network applications have led to the development of video systems over an open network, like the Internet. In the meantime, MPEG has become the de facto standard for video compression. This makes MPEG video player systems the mainstream of video display in multimedia applications. Currently, the quality of services (QoS) for video is commonly measured by the number of frames or the number of bytes received on time (QoS-Frame and QoS-Byte, respectively). As the MPEG coding scheme consists of three kinds of frames, each serving di erent purposes, dropping di erent kinds of frames would have di erent impact on the video QoS. This impact in terms of the quality of services, however, cannot be reflected by the traditional metrics, the QoS-Frame and the QoS-Byte. The most important attribute of the QoS of MPEG player systems that is missing from these traditional metrics is the quality perceived by human viewer. Hence, both metrics cannot truly reflect the viewers' view of QoS of MPEG player systems. When a MPEG video player is not working in an ideal environment, for instance, due to slow network or slow processors, it is common to sacri ce some quality of service in order to preserve the smoothness of the video playback. The best choice is to skip as many frames as necessary while providing the highest possible video quality. This paper reports our research on the development of a scheme on optimizing the skipping of frames while minimizing the degradation of video display.

Source Publication

International Workshop on Advanced Image Technology 2007 (IWAIT 2007), Bangkok, Thailand

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