FINALIZATION OF VVENC'S SCREEN CONTENT DETECTOR AND TWO-PASS RATE CONTROL USING PRE-FILTERING STATISTICS
Christian R. Helmrich, Anastasia Henkel, Tobias Hinz, Adam Wieckowski, Benjamin Bross, Detlev Marpe
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For improved performance, practical video encoders integrate algorithms for screen content detection and rate control. This paper outlines recently implemented optimizations to both the screen content classifier (SCC) and two-pass rate control (RC) of VVenC, an open Versatile Video Coding (VVC) compliant encoder. The improvements, confirmed by evaluation experiments in random-access configurations using an extended set of test videos, are mainly achieved by leveraging motion error statistics acquired during motion compensated temporal pre-filtering (MCTPF), carried out in VVenC's pre-analysis stage. All three aspects – pre-analysis stage, SCC, and RC – are revisited herein, and the exploitation of MCTPF data is described.