Rate-Distortion Control with Delay Bound Constraint for Video Streaming over Multi-Hop Networks

摘要

We develop a relatively accurate and robust R-D control algorithm in the H.264/AVC to achieve the target bit rate. More specifically, we first present an efficient bandwidth resource allocation framework to obtain a relatively accurate bandwidth resource allocation as bit rate budget, which is based on a proposed multi-hop packet delay bound violation model to predict the packet loss probability. With this widely-used offline-training-online-estimation mechanism, the proposed model is potentially applicable to almost all network conditions and can provide fairly accurate estimation results as compared with other models with a given sample data set. Once the channel bandwidth has been allocated to each video program and the target bit rate for each video frame is determined, and then, we introduce the concept of low-pass filtering of R-D functions and develop a smoothed rate control (SRC) framework for video recording and streaming. The extensive simulations demonstrate the SRC algorithm is effective and the proposed SRC algorithm has very low computational complexity and implementation cost.