{"id":"https://openalex.org/W2940868420","doi":null,"title":"Investigating audio classification to automate the trimming of recorded lectures","display_name":"Investigating audio classification to automate the trimming of recorded lectures","publication_year":2018,"publication_date":"2018-01-01","ids":{"openalex":"https://openalex.org/W2940868420","mag":"2940868420"},"language":"en","primary_location":{"id":"pmh:oai:localhost:11427/29778","doi":null,"is_oa":true,"landing_page_url":"http://hdl.handle.net/11427/29778","pdf_url":"http://hdl.handle.net/11427/29778","source":{"id":"https://openalex.org/S4306402129","display_name":"Open University of Cape Town (University of Cape Town)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I157614274","host_organization_name":"University of Cape Town","host_organization_lineage":["https://openalex.org/I157614274"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Master Thesis"},"volume":null,"type":"dissertation","is_traditional":true,"indexed_in":[],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"http://hdl.handle.net/11427/29778","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5002584748","display_name":"Devandran Govender","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Devandran Govender","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5002584748"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":1,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11309","display_name":"Music and Audio Processing","score":0.7329000234603882,"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/T11309","display_name":"Music and Audio Processing","score":0.7329000234603882,"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/T10860","display_name":"Speech and Audio Processing","score":0.1525000035762787,"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/T10201","display_name":"Speech Recognition and Synthesis","score":0.0828000009059906,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/audio-classification","display_name":"audio classification","score":0.8109999895095825},{"id":"https://openalex.org/keywords/speech-detection","display_name":"speech detection","score":0.7049999833106995}],"concepts":[{"id":"https://openalex.org/C56951928","wikidata":"https://www.wikidata.org/wiki/Q3539213","display_name":"Trimming","level":2,"score":0.805309534072876},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.624812126159668},{"id":"https://openalex.org/C113954288","wikidata":"https://www.wikidata.org/wiki/Q186885","display_name":"Timestamp","level":2,"score":0.6195524334907532},{"id":"https://openalex.org/C28490314","wikidata":"https://www.wikidata.org/wiki/Q189436","display_name":"Speech recognition","level":1,"score":0.612105667591095},{"id":"https://openalex.org/C2780513914","wikidata":"https://www.wikidata.org/wiki/Q18210350","display_name":"Bottleneck","level":2,"score":0.5401782393455505},{"id":"https://openalex.org/C98045186","wikidata":"https://www.wikidata.org/wiki/Q205663","display_name":"Process (computing)","level":2,"score":0.4409506916999817},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.34677934646606445},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.21594339609146118},{"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/C149635348","wikidata":"https://www.wikidata.org/wiki/Q193040","display_name":"Embedded system","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:localhost:11427/29778","doi":null,"is_oa":true,"landing_page_url":"http://hdl.handle.net/11427/29778","pdf_url":"http://hdl.handle.net/11427/29778","source":{"id":"https://openalex.org/S4306402129","display_name":"Open University of Cape Town (University of Cape Town)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I157614274","host_organization_name":"University of Cape Town","host_organization_lineage":["https://openalex.org/I157614274"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Master Thesis"},{"id":"mag:2940868420","doi":null,"is_oa":false,"landing_page_url":"https://open.uct.ac.za/handle/11427/29778","pdf_url":null,"source":null,"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":null}],"best_oa_location":{"id":"pmh:oai:localhost:11427/29778","doi":null,"is_oa":true,"landing_page_url":"http://hdl.handle.net/11427/29778","pdf_url":"http://hdl.handle.net/11427/29778","source":{"id":"https://openalex.org/S4306402129","display_name":"Open University of Cape Town (University of Cape Town)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I157614274","host_organization_name":"University of Cape Town","host_organization_lineage":["https://openalex.org/I157614274"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Master Thesis"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2940868420.pdf","grobid_xml":"https://content.openalex.org/works/W2940868420.grobid-xml"},"referenced_works_count":46,"referenced_works":["https://openalex.org/W2169610","https://openalex.org/W15066456","https://openalex.org/W1269046860","https://openalex.org/W1504240446","https://openalex.org/W1547486901","https://openalex.org/W1563939609","https://openalex.org/W1587741888","https://openalex.org/W1620668332","https://openalex.org/W1966812932","https://openalex.org/W1969715806","https://openalex.org/W1995387737","https://openalex.org/W2046134527","https://openalex.org/W2057613716","https://openalex.org/W2069883713","https://openalex.org/W2069976350","https://openalex.org/W2074188409","https://openalex.org/W2081353817","https://openalex.org/W2083837083","https://openalex.org/W2093103229","https://openalex.org/W2097807493","https://openalex.org/W2098868326","https://openalex.org/W2102893423","https://openalex.org/W2103869314","https://openalex.org/W2106339924","https://openalex.org/W2107169849","https://openalex.org/W2110215948","https://openalex.org/W2110458017","https://openalex.org/W2111331420","https://openalex.org/W2115101691","https://openalex.org/W2118724348","https://openalex.org/W2120599713","https://openalex.org/W2122111042","https://openalex.org/W2124384059","https://openalex.org/W2125838338","https://openalex.org/W2128838222","https://openalex.org/W2133824856","https://openalex.org/W2137639365","https://openalex.org/W2139212933","https://openalex.org/W2144345993","https://openalex.org/W2146940709","https://openalex.org/W2165880886","https://openalex.org/W2168441989","https://openalex.org/W2172256532","https://openalex.org/W2175408845","https://openalex.org/W2740589650","https://openalex.org/W4256161595"],"related_works":["https://openalex.org/W2972401181","https://openalex.org/W2973538113","https://openalex.org/W1561849896","https://openalex.org/W157162596","https://openalex.org/W2110215948","https://openalex.org/W2160665135","https://openalex.org/W2146585386","https://openalex.org/W2123986418","https://openalex.org/W3139310036","https://openalex.org/W7221342526"],"abstract_inverted_index":{"With":[0],"the":[1,14,53,56,61,70,90,111,140,155,158,164,179,186,241,246,250],"demand":[2],"for":[3,138,185,252],"recorded":[4,187],"lectures":[5],"to":[6,21,39,50,100,116,125,177],"be":[7],"made":[8],"available":[9],"as":[10,12,96],"soon":[11],"possible,":[13],"University":[15],"of":[16,25,60,66,74,89,113,163,214,233],"Cape":[17],"Town":[18],"(UCT)":[19],"needs":[20],"find":[22],"innovative":[23],"ways":[24],"removing":[26],"bottlenecks":[27],"in":[28,55],"lecture":[29],"capture":[30,38],"workflow":[31],"and":[32,72,130,142,148,160,181,243],"thereby":[33],"improving":[34],"turn-around":[35],"times":[36],"from":[37,69,200,216,235],"publication.":[40],"UCT":[41],"utilises":[42],"Opencast,":[43],"which":[44],"is":[45,78],"an":[46,211,230],"open":[47],"source":[48],"system":[49],"manage":[51],"all":[52],"steps":[54,62],"lecture-capture":[57,91],"process.":[58],"One":[59],"involves":[63],"manual":[64],"trimming":[65,87],"unwanted":[67],"segments":[68,81],"beginning":[71],"end":[73,182],"video":[75],"before":[76],"it":[77],"published.":[79],"These":[80,173],"generally":[82],"contain":[83],"student":[84,145],"chatter.":[85],"The":[86,189,202],"step":[88],"process":[92],"has":[93],"been":[94],"identified":[95],"a":[97,134,193,225],"bottleneck":[98],"due":[99],"its":[101],"dependence":[102],"on":[103],"staff":[104],"availability.":[105],"In":[106,152],"this":[107,118,253],"study,":[108],"we":[109],"investigate":[110],"potential":[112],"audio":[114],"classification":[115,121,156,190],"automate":[117],"step.":[119],"A":[120],"model":[122,191],"was":[123,248],"trained":[124],"detect":[126],"2":[127],"classes:":[128],"speech":[129,165,199],"non-speech.":[131,201],"Speech":[132],"represents":[133,144],"single":[135],"dominant":[136],"voice,":[137],"example,":[139],"lecturer,":[141],"non-speech":[143],"chatter,":[146],"silence":[147],"other":[149],"environmental":[150],"sounds.":[151],"conjunction":[153],"with":[154,168,210,229],"model,":[157],"first":[159],"last":[161],"instances":[162],"class":[166],"together":[167],"their":[169],"timestamps":[170,174],"are":[171,175],"detected.":[172],"used":[176],"predict":[178],"start":[180,203],"trim":[183,204,221],"points":[184],"lecture.":[188],"achieved":[192],"97.8%":[194],"accuracy":[195],"rate":[196],"at":[197],"detecting":[198],"point":[205,222],"predictions":[206,223],"were":[207],"very":[208],"positive,":[209],"average":[212,231],"difference":[213,232],"-11.22s":[215],"gold":[217,236],"standard":[218,237],"data.":[219,238],"End":[220],"showed":[224],"much":[226],"greater":[227],"deviation,":[228],"145.16s":[234],"Discussions":[239],"between":[240],"lecturer":[242],"students,":[244],"after":[245],"lecture,":[247],"predominantly":[249],"reason":[251],"discrepancy.":[254]},"counts_by_year":[{"year":2024,"cited_by_count":1}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2019-05-03T00:00:00"}