Two-pass rate control techniques for video coding that uses the maximum approach - minimum

摘要

This specification describes rate control techniques that can improve video coding based on a "two-pass" approach. The first pass is, rate of the video sequence based on the statistics of the path of the first - coding the video sequence using the set quantization parameter of the first (QP) for the purpose of estimating the distortion characteristics to reduction. QP set of the second, can be defined for coding of the second pass then. Rate is estimated in the first pass - distortion characteristics are used to select the QP for the second pass in a manner that minimizes the distortion between frames of the video sequence. Moreover, that the selection of the set of QP second, to maximize likewise the quality of the frame quality variation that is substantially minimized in order to achieve low average frame distortion quality variations are minimized possible.