Rate Estimation Techniques For Encoder Parallelization

In this paper, we present a novel rate estimation technique for rate control with frame parallelization in video encoding. The proposed rate control accounts for internal delay in the frame encoder pipeline, which is suitable for multithreaded or faster software (SW) encoders and custom hardware or ASIC (HW) encoders. It includes an accurate frame size prediction model based on a complete set of first-pass statistics data for every frame. Using better prediction models with linear and nonlinear model functions, we achieve improved accuracy, with respect to encoding quality as well as improving rate control bits-per-frame planning.