A fast and accurate characteristic-based rate-quantization model for video transmission

Abstract

In this paper, we analyze the limitation of ρ-domain based rate-quantization (R-Q) model. We find out that a characteristic-based R-Q model can be derived from ρ-domain to q-domain. Experimental data show that such a characteristic-based R-Q model can provide a more accurate estimation of the actual bitrate than existing models for both frame-level and macroblock(MB)-level. In addition, a simple analysis of computational complexity of our quantizationfree characteristics extraction framework shows that our model is faster than existing variance and ρ-domain based R-Q models.

Accurate Bitrate Model and Greedy-Based Rate Controller for Low Delay Video Transmission

“…Finally, the R-Q model is constructed as a one-to-one mapping between ρ and q. Note that although pseudocoding in the ρ domain is quite accurate, the linearity between R and ρ does not always hold [22]. If the 1 In this paper, we use q and QP interchangeably.…”