The new high efficiency video coding (HEVC) standard facilitates the realisation of ultrahigh-definition video applications. Although the compression efficiency of the HEVC standard is double that of the well-establis...
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The new high efficiency video coding (HEVC) standard facilitates the realisation of ultrahigh-definition video applications. Although the compression efficiency of the HEVC standard is double that of the well-established H.264 standard, HEVC incurs a considerably higher encoding complexity. This Letter presents an algorithm aimed at expediting reference picture selection processes in HEVC encoding. The proposed algorithm is primarily based on a reference picture and block discovered using the advanced motion vector prediction (amvp) algorithm. Two acceleration conditions are included in the proposed algorithm. The first early-decision condition entails examining the rate-distortion (RD) cost associated with amvp, and if this cost is lower than a predefined threshold, motion estimation is confined to the amvp-selected reference picture. Furthermore, for coding units of size 64 x 64 (N = 32) with a prediction-unit (PU) partitioning of 2N x N or N x 2N, the second PU uses the same reference picture as the first PU if the first PU satisfies the first early-decision condition. The experimental results revealed that the proposed algorithm considerably reduced the total encoding time with negligible RD degradation.
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