{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T06:43:50Z","timestamp":1740120230815,"version":"3.37.3"},"reference-count":22,"publisher":"World Scientific Pub Co Pte Ltd","issue":"01","funder":[{"DOI":"10.13039\/501100001809","name":"the National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["61370111"],"award-info":[{"award-number":["61370111"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100005089","name":"Beijing Municipal Natural Science Foundation","doi-asserted-by":"publisher","award":["4172020"],"award-info":[{"award-number":["4172020"]}],"id":[{"id":"10.13039\/501100005089","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Great Wall Scholar Project of Beijing Municipal Education Commission","award":["CIT&TCD20180304"],"award-info":[{"award-number":["CIT&TCD20180304"]}]},{"name":"Beijing Youth Talent Project","award":["CIT&TCD 201504001"],"award-info":[{"award-number":["CIT&TCD 201504001"]}]},{"name":"Beijing Municipal Education Commission General Program","award":["KM201610009003"],"award-info":[{"award-number":["KM201610009003"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Patt. Recogn. Artif. Intell."],"published-print":{"date-parts":[[2020,1]]},"abstract":"<jats:p> Virtual Reality (VR) 360<jats:sup>\u2218<\/jats:sup> 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<jats:sup>\u2218<\/jats:sup> 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. 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