(A) fast mode decision method using adaptive ordering of modes for HEVC inter coding

Abstract

High Efficiency Video Coding (HEVC) has brought significant improvement to video compression in terms of coding performance and subjective quality. However, it is computationally more complex than H.264/AVC, and hence adaptation of HEVC to real-time video services has not been promising. In order to reduce the computational cost, we propose a fast mode decision method that is based on the adaptive ordering of modes. Our experiment results show that the proposed method reduces the total encoding time by 47.61%-64.97% and 47.30%-65.22% with negligible degradation of coding performance, which is a Bjontegaard Delta-rate (BD-rate) increment of 0.34%-1.75% and 0.66%-2.42% under random-access configuration and low-delay configuration, respectively, compared to HM12.1 with fast mode off.