Over the past decade, rateless codes, i.e., digital fountain codes, have emerged as an efficient and robust solution for reliable data transmission over packet erasure networks and a particularly suitable one for multicasting and broadcasting applications where users may experience variable channel conditions and packet loss rates, such as mobile environments. Luby Transform (LT) and Raptor codes are practical fountain codes with a capacity approaching performance and a low computational cost. In addition to their channel coding applications, the use of fountain codes for various kinds of distributed source compression and distributed joint-source channel coding has been extensively studied lately, and with promising results. However, a systematic treatise of the code design and optimization considerations for such non-standard applications of fountain codes is still absent. In this contribution, we overview the main results concerned with rateless codes for distributed source coding and outline several examples of data dissemination protocols where carefully designed fountain codes can provide strikingly simple, yet robust solutions yielding both distributed source coding and channel coding gains.
{"title":"Rateless distributed source code design","authors":"D. Sejdinovic, R. Piechocki, A. Doufexi","doi":"10.1145/1653543.1653578","DOIUrl":"https://doi.org/10.1145/1653543.1653578","url":null,"abstract":"Over the past decade, rateless codes, i.e., digital fountain codes, have emerged as an efficient and robust solution for reliable data transmission over packet erasure networks and a particularly suitable one for multicasting and broadcasting applications where users may experience variable channel conditions and packet loss rates, such as mobile environments. Luby Transform (LT) and Raptor codes are practical fountain codes with a capacity approaching performance and a low computational cost. In addition to their channel coding applications, the use of fountain codes for various kinds of distributed source compression and distributed joint-source channel coding has been extensively studied lately, and with promising results. However, a systematic treatise of the code design and optimization considerations for such non-standard applications of fountain codes is still absent. In this contribution, we overview the main results concerned with rateless codes for distributed source coding and outline several examples of data dissemination protocols where carefully designed fountain codes can provide strikingly simple, yet robust solutions yielding both distributed source coding and channel coding gains.","PeriodicalId":348717,"journal":{"name":"Proceedings of the 5th International Mobile Multimedia Communications Conference","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124342423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-09-07DOI: 10.4108/ICST.MOBIMEDIA2009.7407
D. Vukobratović, V. Stanković, L. Stanković, D. Sejdinovic
Rateless codes are forward error correcting (FEC) codes of linear encoding-decoding complexity and asymptotically capacity-approaching performance over erasure channels with any erasure statistics. They have been recently recognized as a simple and efficient solution for packetized video transmission over networks with packet erasures. However, to adapt the error correcting capabilities of rateless codes to the unequal importance of scalable video, unequal error protection (UEP) rateless codes are proposed as an alternative to standard rateless codes. In this paper, we extend our recent work on UEP rateless codes called Expanding Window Fountain (EWF) codes in order to improve their UEP performance. We investigate the design of precoded EWF codes, where precoding is done using high-rate Low-Density Parity-Check (LDPC) codes, following the similar reasoning applied in the design of Raptor codes. The obtained results are presented in the context of UEP error correcting performance of EWF codes and applied on scalable video coded (SVC) transmission over erasure networks.
{"title":"Precoded EWF codes for unequal error protection of scalable video","authors":"D. Vukobratović, V. Stanković, L. Stanković, D. Sejdinovic","doi":"10.4108/ICST.MOBIMEDIA2009.7407","DOIUrl":"https://doi.org/10.4108/ICST.MOBIMEDIA2009.7407","url":null,"abstract":"Rateless codes are forward error correcting (FEC) codes of linear encoding-decoding complexity and asymptotically capacity-approaching performance over erasure channels with any erasure statistics. They have been recently recognized as a simple and efficient solution for packetized video transmission over networks with packet erasures. However, to adapt the error correcting capabilities of rateless codes to the unequal importance of scalable video, unequal error protection (UEP) rateless codes are proposed as an alternative to standard rateless codes. In this paper, we extend our recent work on UEP rateless codes called Expanding Window Fountain (EWF) codes in order to improve their UEP performance. We investigate the design of precoded EWF codes, where precoding is done using high-rate Low-Density Parity-Check (LDPC) codes, following the similar reasoning applied in the design of Raptor codes. The obtained results are presented in the context of UEP error correcting performance of EWF codes and applied on scalable video coded (SVC) transmission over erasure networks.","PeriodicalId":348717,"journal":{"name":"Proceedings of the 5th International Mobile Multimedia Communications Conference","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115449068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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