{"id":"https://openalex.org/W1968887654","doi":"https://doi.org/10.1109/tit.2015.2417173","title":"On the Penalty of Optimal Fix-Free Codes","display_name":"On the Penalty of Optimal Fix-Free Codes","publication_year":2015,"publication_date":"2015-03-27","ids":{"openalex":"https://openalex.org/W1968887654","doi":"https://doi.org/10.1109/tit.2015.2417173","mag":"1968887654"},"language":"en","primary_location":{"id":"doi:10.1109/tit.2015.2417173","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tit.2015.2417173","pdf_url":null,"source":{"id":"https://openalex.org/S4502562","display_name":"IEEE Transactions on Information Theory","issn_l":"0018-9448","issn":["0018-9448","1557-9654"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Information Theory","raw_type":"journal-article"},"type":"article","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/A5053500333","display_name":"Sayed Jalal Zahabi","orcid":"https://orcid.org/0000-0001-5868-8192"},"institutions":[{"id":"https://openalex.org/I170013655","display_name":"Isfahan University of Technology","ror":"https://ror.org/00af3sa43","country_code":"IR","type":"education","lineage":["https://openalex.org/I170013655"]}],"countries":["IR"],"is_corresponding":false,"raw_author_name":"Sayed Jalal Zahabi","raw_affiliation_strings":["Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran","Department of Electrical and computer engineering, Isfahan University of Technology, Isfahan, Iran"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran","institution_ids":["https://openalex.org/I170013655"]},{"raw_affiliation_string":"Department of Electrical and computer engineering, Isfahan University of Technology, Isfahan, Iran","institution_ids":["https://openalex.org/I170013655"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5090381199","display_name":"Mohammadali Khosravifard","orcid":"https://orcid.org/0000-0002-0645-7285"},"institutions":[{"id":"https://openalex.org/I170013655","display_name":"Isfahan University of Technology","ror":"https://ror.org/00af3sa43","country_code":"IR","type":"education","lineage":["https://openalex.org/I170013655"]}],"countries":["IR"],"is_corresponding":false,"raw_author_name":"Mohammadali Khosravifard","raw_affiliation_strings":["Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran","Department of Electrical and computer engineering, Isfahan University of Technology, Isfahan, Iran"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran","institution_ids":["https://openalex.org/I170013655"]},{"raw_affiliation_string":"Department of Electrical and computer engineering, Isfahan University of Technology, Isfahan, Iran","institution_ids":["https://openalex.org/I170013655"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I170013655"],"apc_list":null,"apc_paid":null,"fwci":0.4365,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.76167576,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":95},"biblio":{"volume":"61","issue":"5","first_page":"2776","last_page":"2787"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11269","display_name":"Algorithms and Data Compression","score":0.9995999932289124,"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"}},"topics":[{"id":"https://openalex.org/T11269","display_name":"Algorithms and Data Compression","score":0.9995999932289124,"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"}},{"id":"https://openalex.org/T11321","display_name":"Error Correcting Code Techniques","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"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/T12029","display_name":"DNA and Biological Computing","score":0.998199999332428,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/alphabet","display_name":"Alphabet","score":0.6998144388198853},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.5559991598129272},{"id":"https://openalex.org/keywords/penalty-method","display_name":"Penalty method","score":0.4725379943847656},{"id":"https://openalex.org/keywords/code","display_name":"Code (set theory)","score":0.4562855660915375},{"id":"https://openalex.org/keywords/redundancy","display_name":"Redundancy (engineering)","score":0.42757901549339294},{"id":"https://openalex.org/keywords/prefix-code","display_name":"Prefix code","score":0.41550832986831665},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3604314625263214},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.3533848524093628},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.33599331974983215},{"id":"https://openalex.org/keywords/linear-code","display_name":"Linear code","score":0.270982027053833},{"id":"https://openalex.org/keywords/block-code","display_name":"Block code","score":0.2500024437904358},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.21928739547729492},{"id":"https://openalex.org/keywords/decoding-methods","display_name":"Decoding methods","score":0.2081182599067688},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.11383494734764099}],"concepts":[{"id":"https://openalex.org/C112876837","wikidata":"https://www.wikidata.org/wiki/Q837518","display_name":"Alphabet","level":2,"score":0.6998144388198853},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5559991598129272},{"id":"https://openalex.org/C6180225","wikidata":"https://www.wikidata.org/wiki/Q3411771","display_name":"Penalty method","level":2,"score":0.4725379943847656},{"id":"https://openalex.org/C2776760102","wikidata":"https://www.wikidata.org/wiki/Q5139990","display_name":"Code (set theory)","level":3,"score":0.4562855660915375},{"id":"https://openalex.org/C152124472","wikidata":"https://www.wikidata.org/wiki/Q1204361","display_name":"Redundancy (engineering)","level":2,"score":0.42757901549339294},{"id":"https://openalex.org/C20079647","wikidata":"https://www.wikidata.org/wiki/Q1278039","display_name":"Prefix code","level":5,"score":0.41550832986831665},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3604314625263214},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3533848524093628},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.33599331974983215},{"id":"https://openalex.org/C2400350","wikidata":"https://www.wikidata.org/wiki/Q1752667","display_name":"Linear code","level":4,"score":0.270982027053833},{"id":"https://openalex.org/C157125643","wikidata":"https://www.wikidata.org/wiki/Q884707","display_name":"Block code","level":3,"score":0.2500024437904358},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.21928739547729492},{"id":"https://openalex.org/C57273362","wikidata":"https://www.wikidata.org/wiki/Q576722","display_name":"Decoding methods","level":2,"score":0.2081182599067688},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.11383494734764099},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tit.2015.2417173","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tit.2015.2417173","pdf_url":null,"source":{"id":"https://openalex.org/S4502562","display_name":"IEEE Transactions on Information Theory","issn_l":"0018-9448","issn":["0018-9448","1557-9654"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Information Theory","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":25,"referenced_works":["https://openalex.org/W1979600080","https://openalex.org/W2013445432","https://openalex.org/W2022421187","https://openalex.org/W2025913291","https://openalex.org/W2029495080","https://openalex.org/W2031806265","https://openalex.org/W2033806151","https://openalex.org/W2043622336","https://openalex.org/W2044804826","https://openalex.org/W2055286490","https://openalex.org/W2060108852","https://openalex.org/W2072549963","https://openalex.org/W2076304889","https://openalex.org/W2110968394","https://openalex.org/W2125700782","https://openalex.org/W2130341255","https://openalex.org/W2148642357","https://openalex.org/W2166451469","https://openalex.org/W2169389509","https://openalex.org/W2288450576","https://openalex.org/W2293297233","https://openalex.org/W2320190128","https://openalex.org/W2344585715","https://openalex.org/W2478708596","https://openalex.org/W2787523326"],"related_works":["https://openalex.org/W2026774722","https://openalex.org/W2377699565","https://openalex.org/W2465989830","https://openalex.org/W2384679811","https://openalex.org/W2368200340","https://openalex.org/W2383679568","https://openalex.org/W2093178562","https://openalex.org/W1558498394","https://openalex.org/W4206106662","https://openalex.org/W2105151870"],"abstract_inverted_index":{"In":[0,42],"this":[1],"paper,":[2],"the":[3,6,9,17,24,29,48,68,79,99,106],"difference":[4],"between":[5],"redundancy":[7],"of":[8,16,26,32,51],"optimal":[10,18],"asymmetric/symmetric":[11],"fix-free":[12,33,53,93],"code,":[13],"and":[14],"that":[15,47,66,98],"prefix-free":[19],"code":[20],"is":[21,37,45,55,64,72,81,96],"considered":[22],"as":[23,105],"penalty":[25,36,50,80,101],"benefiting":[27],"from":[28,39],"desired":[30],"properties":[31],"codes.":[34],"This":[35],"studied":[38],"different":[40],"perspectives.":[41],"particular,":[43],"it":[44,63,95],"shown":[46,97],"average":[49,100],"asymmetric":[52],"codes":[54],"less":[56,82],"than":[57,83],"0.21":[58],"bit":[59,88],"per":[60,89],"symbol.":[61,90],"Moreover,":[62],"proved":[65],"when":[67],"source":[69,107],"alphabet":[70,108],"size":[71,109],"sufficiently":[73],"large,":[74],"for":[75],"almost":[76],"all":[77],"sources,":[78],"or":[84],"equal":[85],"to":[86,103],"0.182":[87],"Regarding":[91],"symmetric":[92],"codes,":[94],"tends":[102],"infinity":[104],"increases.":[110]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2015,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
