期刊
出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218001420550010
关键词
360 degrees video; HEVC; fast intra coding; mode selection
资金
- National Natural Science Foundation of China [61370111]
- Beijing Municipal Natural Science Foundation [4172020]
- Great Wall Scholar Project of Beijing Municipal Education Commission [CITTCD20180304]
- Beijing Youth Talent Project [CITTCD 201504001]
- Beijing Municipal Education Commission General Program [KM201610009003]
Virtual Reality (VR) 360 degrees video is spherical, and has ultra-high definition. It is time-consuming to code it using High Efficient Video Coding (HEVC) directly. In this paper, a fast intra mode selection algorithm based on Coding Unit (CU) size is proposed for VR 360 degrees video in Cubemap projection (CMP) format. A redefined mode selection strategy for two-stage Rough mode decision (RMD) is designed based on different depth CUs to reduce coding time during intra prediction process. The experimental results show that the proposed algorithm brings 27.70% saving in average coding time at the cost of only 0.8% Bjontegaard delta rate increase in All-Intra mode.
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