TRANSMISSION RATE CONTROLLING METHOD AND APPARATUS FOR FIXED RATE MPEG IMAGE TRANSMITTER

摘要

Video rate control and buffering based on a rate estimator and scene change features has been investigated for constant bit rate channels. A scene change-based, predictive technique has been applied so that the buffer occupancy may be controlled effectively in advance of encountering a dramatic variation in the video rate. The current occupancy and the future occupancy, has been used to control the quantization step size to provide substantial improvements in the video rate control. A non-linear rate estimator based on the RBF network which has better performance in terms of the buffer occupancy is also provided.