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Improved Intra Mode Signaling for HEVC Host Publication: 2011 International Workshop on Acoustics and Video Coding and Communication (AVCC 2011) Authors: G. Van Wallendael, S. Van Leuven, J. De Cock, P. Lambert, J. Barbarien, A. Munteanu and R. Van De Walle Publication Date: Jul. 2011
Abstract: In the current development of HEVC, the compression improvement
compared to H.264/AVC is far more significant
for inter pictures than for intra pictures. One of the problems
introduced by HEVC intra compression is the large amount
of intra modes (up to 34) that need to be signaled in the
bitstream. In this paper, we describe a low complexity intra
mode prediction algorithm which predicts the intra modes
more accurately. This is achieved by exploiting the similarity
between the prediction direction of the neighboring prediction
units and the optimal mode of the encoded prediction unit.
As a result, more efficient intra compression can be obtained
with minimal impact on encoder and decoder complexity. On
average, 0.28% bitrate improvement is obtained by this low
complexity prediction algorithm. For sequences dominated
with directional intra modes, around 1% bitrate improvement
is measured.
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