A Foveation-Based Rate Shaping Mechanism for MPEG Videos

摘要

Considering human perceptual property and user specific need can help to reduce the bandwidth requirement for streaming compressed videos over networks. In this paper, we present a foveation-based rate shaping mechanism for MPEG bitstreams. The rate shaper is designed based on an experimental-proven foveation model, and achieve rate reduction by eliminating DCT coefficients embedded in MPEG bit-streams. An efficient rate control mechanism is developed to meet various bitrate requirements, and a real-time implementation is developed to confirm that the proposed scheme is practical for real world usage.