{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:33:38Z","timestamp":1760240018403,"version":"build-2065373602"},"reference-count":22,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2019,1,23]],"date-time":"2019-01-23T00:00:00Z","timestamp":1548201600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61701297"],"award-info":[{"award-number":["61701297"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002858","name":"China Postdoctoral Science Foundation","doi-asserted-by":"publisher","award":["2018M641981"],"award-info":[{"award-number":["2018M641981"]}],"id":[{"id":"10.13039\/501100002858","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>H.265\/HEVC achieves an average bitrate reduction of 50% for fixed video quality compared with the H.264\/AVC standard, while computation complexity is significantly increased. The purpose of this work is to improve coding efficiency for the next-generation video-coding standards. Therefore, by developing a novel spatial neighborhood subset, efficient spatial correlation-based motion vector prediction (MVP) with the coding-unit (CU) depth-prediction algorithm is proposed to improve coding efficiency. Firstly, by exploiting the reliability of neighboring candidate motion vectors (MVs), the spatial-candidate MVs are used to determine the optimized MVP for motion-data coding. Secondly, the spatial correlation-based coding-unit depth-prediction is presented to achieve a better trade-off between coding efficiency and computation complexity for interprediction. This approach can satisfy an extreme requirement of high coding efficiency with not-high requirements for real-time processing. The simulation results demonstrate that overall bitrates can be reduced, on average, by 5.35%, up to 9.89% compared with H.265\/HEVC reference software in terms of the Bjontegaard Metric.<\/jats:p>","DOI":"10.3390\/sym11020129","type":"journal-article","created":{"date-parts":[[2019,1,24]],"date-time":"2019-01-24T03:52:32Z","timestamp":1548301952000},"page":"129","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Spatial Correlation-Based Motion-Vector Prediction for Video-Coding Efficiency Improvement"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2226-482X","authenticated-orcid":false,"given":"Xiantao","family":"Jiang","sequence":"first","affiliation":[{"name":"Department of Information Engineering, Shanghai Maritime University, NO.1550, Haigang Ave., Shanghai 201306, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tian","family":"Song","sequence":"additional","affiliation":[{"name":"Department of Electrical and Electronics Engineering, Tokushima University, 2-24, Shinkura-cho, Tokushima, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takafumi","family":"Katayama","sequence":"additional","affiliation":[{"name":"Department of Electrical and Electronics Engineering, Tokushima University, 2-24, Shinkura-cho, Tokushima, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7197-9912","authenticated-orcid":false,"given":"Jenq-Shiou","family":"Leu","sequence":"additional","affiliation":[{"name":"Department of Electronic and Computer Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Rd., Taipei 106, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,1,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1649","DOI":"10.1109\/TCSVT.2012.2221191","article-title":"Overview of the high efficiency video coding (HEVC) standard","volume":"22","author":"Sullivan","year":"2012","journal-title":"IEEE Trans. Circuits Syst. Video Technol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2836","DOI":"10.1587\/transinf.2015EDL8237","article-title":"Fast coding unit size decision based on probabilistic graphical model in high efficiency video coding inter prediction","volume":"99","author":"Jiang","year":"2016","journal-title":"IEICE Trans. Inf. Syst."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1247","DOI":"10.1109\/TCSVT.2008.928882","article-title":"RD optimized coding for motion vector predictor selection","volume":"18","author":"Laroche","year":"2008","journal-title":"IEEE Trans. Circuits Syst. Video Technol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"957","DOI":"10.1109\/JSTSP.2013.2271975","article-title":"Motion vector coding in the HEVC standard","volume":"7","author":"Lin","year":"2013","journal-title":"IEEE J. Sel. Top. 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