Abstract
This paper considers single video object rate control for MPEG-4 and presents a new rate control algorithm based on the quadratic rate-distortion model. The major innovation are a novel constraint for the least mean square estimation of the model parameters of the rate-distortion function, a new measure for the encoding complexity, and an efficient frame skipping strategy. An extension of the proposed rate control scheme to sequences with multiple video objects is possible. Experiments that were carried out on different video sequences showed an increase in the average PSNR of 1.2 dB and, more significantly, a reduction in the number of skipped frames of about 25% compared to the rate control in the MPEG-4 video verification model. The likelihood of buffer overflows was also greatly reduced for our proposed technique.
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