{"id":"https://openalex.org/W2773582617","doi":"https://doi.org/10.1145/3139367.3139427","title":"On Improving the Speedup of Slice and Tile Level Parallelism in HEVC Using AVX2","display_name":"On Improving the Speedup of Slice and Tile Level Parallelism in HEVC Using AVX2","publication_year":2017,"publication_date":"2017-09-28","ids":{"openalex":"https://openalex.org/W2773582617","doi":"https://doi.org/10.1145/3139367.3139427","mag":"2773582617"},"language":"en","primary_location":{"id":"doi:10.1145/3139367.3139427","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3139367.3139427","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","raw_type":"proceedings-article"},"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5001341576","display_name":"Dimitris Skoumpourdis","orcid":null},"institutions":[{"id":"https://openalex.org/I145722265","display_name":"University of Thessaly","ror":"https://ror.org/04v4g9h31","country_code":"GR","type":"education","lineage":["https://openalex.org/I145722265"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Dimitris Skoumpourdis","raw_affiliation_strings":["Computer Science, Univ. of Thessaly, Lamia, Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Computer Science, Univ. of Thessaly, Lamia, Greece","institution_ids":["https://openalex.org/I145722265"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5103244783","display_name":"Panos K. Papadopoulos","orcid":"https://orcid.org/0000-0002-8658-6158"},"institutions":[{"id":"https://openalex.org/I145722265","display_name":"University of Thessaly","ror":"https://ror.org/04v4g9h31","country_code":"GR","type":"education","lineage":["https://openalex.org/I145722265"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Panos K. Papadopoulos","raw_affiliation_strings":["Computer Science & Biomedical Informatics, Univ. of Thessaly, Lamia Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Computer Science & Biomedical Informatics, Univ. of Thessaly, Lamia Greece","institution_ids":["https://openalex.org/I145722265"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5046588383","display_name":"Maria Koziri","orcid":"https://orcid.org/0000-0001-7491-8998"},"institutions":[{"id":"https://openalex.org/I145722265","display_name":"University of Thessaly","ror":"https://ror.org/04v4g9h31","country_code":"GR","type":"education","lineage":["https://openalex.org/I145722265"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Maria G. Koziri","raw_affiliation_strings":["Computer Science, Univ. of Thessaly, Lamia, Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Computer Science, Univ. of Thessaly, Lamia, Greece","institution_ids":["https://openalex.org/I145722265"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5059860750","display_name":"Nikos Tziritas","orcid":"https://orcid.org/0000-0002-2091-2037"},"institutions":[{"id":"https://openalex.org/I4210144487","display_name":"Cloud Computing Center","ror":"https://ror.org/04aa0zm65","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4210144487"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Nikos Tziritas","raw_affiliation_strings":["Research Center for Cloud Computing, CAS, SIAT, Shenzhen, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Research Center for Cloud Computing, CAS, SIAT, Shenzhen, China","institution_ids":["https://openalex.org/I4210144487"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5048435911","display_name":"Thanasis Loukopoulos","orcid":"https://orcid.org/0000-0002-9701-5932"},"institutions":[{"id":"https://openalex.org/I145722265","display_name":"University of Thessaly","ror":"https://ror.org/04v4g9h31","country_code":"GR","type":"education","lineage":["https://openalex.org/I145722265"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Thanasis Loukopoulos","raw_affiliation_strings":["Computer Science & Biomedical Informatics, Univ. of Thessaly, Lamia Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Computer Science & Biomedical Informatics, Univ. of Thessaly, Lamia Greece","institution_ids":["https://openalex.org/I145722265"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5045528384","display_name":"Ioannis Anagnostopoulos","orcid":"https://orcid.org/0000-0002-0832-0522"},"institutions":[{"id":"https://openalex.org/I145722265","display_name":"University of Thessaly","ror":"https://ror.org/04v4g9h31","country_code":"GR","type":"education","lineage":["https://openalex.org/I145722265"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Ioannis Anagnostopoulos","raw_affiliation_strings":["Computer Science & Biomedical Informatics, Univ. of Thessaly, Lamia Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Computer Science & Biomedical Informatics, Univ. of Thessaly, Lamia Greece","institution_ids":["https://openalex.org/I145722265"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"6"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10741","display_name":"Video Coding and Compression Technologies","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10741","display_name":"Video Coding and Compression Technologies","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10531","display_name":"Advanced Vision and Imaging","score":0.9975000023841858,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11165","display_name":"Image and Video Quality Assessment","score":0.9901999831199646,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/speedup","display_name":"Speedup","score":0.8815370798110962},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8380374908447266},{"id":"https://openalex.org/keywords/parallel-computing","display_name":"Parallel computing","score":0.7562850713729858},{"id":"https://openalex.org/keywords/simd","display_name":"SIMD","score":0.7163031101226807},{"id":"https://openalex.org/keywords/parallelism","display_name":"Parallelism (grammar)","score":0.5993669629096985},{"id":"https://openalex.org/keywords/coding","display_name":"Coding (social sciences)","score":0.558458685874939},{"id":"https://openalex.org/keywords/data-parallelism","display_name":"Data parallelism","score":0.5324617028236389},{"id":"https://openalex.org/keywords/tile","display_name":"Tile","score":0.5076533555984497},{"id":"https://openalex.org/keywords/instruction-level-parallelism","display_name":"Instruction-level parallelism","score":0.47147512435913086},{"id":"https://openalex.org/keywords/performance-improvement","display_name":"Performance improvement","score":0.4195120930671692},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.41888168454170227},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.39701661467552185},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.11673557758331299},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.06281083822250366}],"concepts":[{"id":"https://openalex.org/C68339613","wikidata":"https://www.wikidata.org/wiki/Q1549489","display_name":"Speedup","level":2,"score":0.8815370798110962},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8380374908447266},{"id":"https://openalex.org/C173608175","wikidata":"https://www.wikidata.org/wiki/Q232661","display_name":"Parallel computing","level":1,"score":0.7562850713729858},{"id":"https://openalex.org/C150552126","wikidata":"https://www.wikidata.org/wiki/Q339387","display_name":"SIMD","level":2,"score":0.7163031101226807},{"id":"https://openalex.org/C2781172179","wikidata":"https://www.wikidata.org/wiki/Q853109","display_name":"Parallelism (grammar)","level":2,"score":0.5993669629096985},{"id":"https://openalex.org/C179518139","wikidata":"https://www.wikidata.org/wiki/Q5140297","display_name":"Coding (social sciences)","level":2,"score":0.558458685874939},{"id":"https://openalex.org/C61483411","wikidata":"https://www.wikidata.org/wiki/Q3124522","display_name":"Data parallelism","level":3,"score":0.5324617028236389},{"id":"https://openalex.org/C2780728851","wikidata":"https://www.wikidata.org/wiki/Q468402","display_name":"Tile","level":2,"score":0.5076533555984497},{"id":"https://openalex.org/C140763907","wikidata":"https://www.wikidata.org/wiki/Q2714055","display_name":"Instruction-level parallelism","level":3,"score":0.47147512435913086},{"id":"https://openalex.org/C2778915421","wikidata":"https://www.wikidata.org/wiki/Q3643177","display_name":"Performance improvement","level":2,"score":0.4195120930671692},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.41888168454170227},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.39701661467552185},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.11673557758331299},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.06281083822250366},{"id":"https://openalex.org/C21547014","wikidata":"https://www.wikidata.org/wiki/Q1423657","display_name":"Operations management","level":1,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C142362112","wikidata":"https://www.wikidata.org/wiki/Q735","display_name":"Art","level":0,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C153349607","wikidata":"https://www.wikidata.org/wiki/Q36649","display_name":"Visual arts","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1145/3139367.3139427","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3139367.3139427","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 21st Pan-Hellenic Conference on Informatics","raw_type":"proceedings-article"},{"id":"pmh:oai:ir.lib.uth.gr:11615/79105","is_oa":false,"landing_page_url":"http://hdl.handle.net/11615/79105","pdf_url":null,"source":{"id":"https://openalex.org/S4306400243","display_name":"University of Thessaly Institutional Repository (University of Thessaly)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I145722265","host_organization_name":"University of Thessaly","host_organization_lineage":["https://openalex.org/I145722265"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"ACM International Conference Proceeding Series","raw_type":"conferenceItem"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.4699999988079071,"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":20,"referenced_works":["https://openalex.org/W1994940553","https://openalex.org/W2031464713","https://openalex.org/W2040610433","https://openalex.org/W2042723076","https://openalex.org/W2071842218","https://openalex.org/W2080005502","https://openalex.org/W2087895971","https://openalex.org/W2131799300","https://openalex.org/W2140199336","https://openalex.org/W2146395539","https://openalex.org/W2295655546","https://openalex.org/W2515272374","https://openalex.org/W2549037874","https://openalex.org/W2550385118","https://openalex.org/W2576091093","https://openalex.org/W2585814560","https://openalex.org/W2611150724","https://openalex.org/W2766359043","https://openalex.org/W2894831973","https://openalex.org/W3092422732"],"related_works":["https://openalex.org/W1496703677","https://openalex.org/W3007272028","https://openalex.org/W2526302199","https://openalex.org/W4240606930","https://openalex.org/W2105992728","https://openalex.org/W1991844655","https://openalex.org/W2160476201","https://openalex.org/W2003935582","https://openalex.org/W47034296","https://openalex.org/W2770125147"],"abstract_inverted_index":{"HEVC":[0,28,66],"has":[1],"emerged":[2],"as":[3],"the":[4,14,65,78],"new":[5],"video":[6,104],"coding":[7],"standard":[8],"promising":[9],"improved":[10],"compression":[11],"ratios":[12],"(for":[13],"same":[15],"quality)":[16],"by":[17,69],"up":[18,64],"to":[19,22,34,120,131],"50%":[20],"compared":[21,33,119],"H.264/AVC.":[23],"To":[24],"achieve":[25],"this":[26,38,55],"performance":[27],"requires":[29],"increased":[30],"computational":[31],"overhead":[32],"its":[35],"predecessor.":[36],"For":[37],"reason":[39],"parallelism":[40,73,85,124],"is":[41,125],"used,":[42],"usually":[43],"at":[44,86],"a":[45],"coarse":[46,71,122],"grained":[47,72,123],"level,":[48],"e.g.,":[49],"per":[50],"slice":[51],"or":[52],"tile.":[53],"In":[54],"paper":[56],"we":[57],"turn":[58],"our":[59],"attention":[60],"towards":[61],"further":[62],"speeding":[63],"encoding":[67,112],"process":[68],"combining":[70],"with":[74,101],"fine":[75],"grained,":[76],"in":[77,128],"form":[79],"of":[80,89,95,114],"AVX2":[81],"instructions":[82],"implementing":[83],"SIMD":[84],"SAD":[87],"(Sum":[88,94],"Absolute":[90],"Difference)":[91],"and":[92],"SSE":[93],"Squared":[96],"Error)":[97],"calculations.":[98],"Experimental":[99],"evaluation":[100],"common":[102],"test":[103],"sequences":[105],"illustrates":[106],"that":[107],"an":[108],"additional":[109],"reduction":[110],"(in":[111],"time)":[113],"roughly":[115],"11%":[116],"on":[117],"average,":[118],"standalone":[121],"achievable,":[126],"leading":[127],"many":[129],"cases":[130],"superlinear":[132],"speedup.":[133]},"counts_by_year":[{"year":2019,"cited_by_count":1}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2017-12-22T00:00:00"}