End-to-end delay analysis of videoconferencing over packet-switched networks
IEEE/ACM Transactions on Networking (TON)
A gamma-based framework for modeling variable-rate MPEG video sources: the GOP GBAR model
IEEE/ACM Transactions on Networking (TON)
Recent advances in rate control for video coding
Image Communication
A control-theoretic approach to rate control for streaming videos
IEEE Transactions on Multimedia - Special issue on quality-driven cross-layer design for multimedia communications
Analysis and design of a proportional-integral rate controller for streaming videos
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Congestion control in high-speed communication networks using the Smith principle
Automatica (Journal of IFAC)
Adaptive traffic smoothing for live VBR MPEG video service
Computer Communications
Low cost pre-stored video transmission across networks
Computer Communications
A novel scheme of transporting pre-stored MPEG video to support video-on-demand (VoD) services
Computer Communications
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Rate control is considered an important issue in video coding, since it significantly affects video quality. We discuss joint encoder and channel rate control for variable bit-rate (VBR) video over packet-switched ATM networks. Since variable bit-rate traffic is allowed in such networks, an open-loop encoder without rate control can generate consistent quality video. However, in order to improve the statistical multiplexing gain (SMG), an encoder buffer is essential to meet traffic constraints imposed by networks and to smooth the highly variable video bitstream. Due to the finite buffer size, some forms of encoder rate control have to be enforced, and consequently, video quality varies. We argue that a rate control scheme has to balance both issues of consistent video quality on the encoder side and bitstream smoothness for the SMG on the network side. We present a joint encoder and channel rate control algorithm for ATM networks with leaky buckets as open-loop source flow control models. The algorithm considers constraints imposed by the encoder and decoder buffers, the leaky bucket control, traffic smoothing, and rate control. The encoder rate control is separated into a sustainable-rate control and a unidirectional instantaneous-rate control. It can improve the problem of leaky bucket saturation exhibited in previous works. Experimental results with MPEG video are presented. The results verify our analysis and show the effectiveness of the proposed algorithm