Advanced LT codes in satellite data broadcasting system

Zhu, Hongpeng; Li, Guangxia; Xie, Zhidong

doi:10.1109/iccs.2008.4737419

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…At the same time LDPC decoder is performed in parallel with the initialization as in (4). Using these initialized values, the LT decoder estimates LLR values in (1) and (2) alternatively, in parallel with the LDPC decoder estimate alternative LLR values in (5) and (6).…”

Section: Proposed Parallel Soft Decoding For Raptor Codesmentioning

confidence: 99%

“…The satellite system is an effective means to provide MBMS, and thus rateless codes are considered to provide satellite broadcasting services efficiently. For example, in order to overcome the heterogeneity and reduce the number of retransmissions, the packet level forward error correction (FEC) scheme using LT codes was incorporated in satellite data broadcasting system in [6]. Applications of raptor codes for the digital video broadcasting via satellite (DVB-S) system were considered in [7] [8].…”

Section: Introductionmentioning

confidence: 99%

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Efficient Soft Decoding of Raptor Codes for Satellite Broadcasting System

Zhang¹,

Kim²

2015

Proceedings of the International Conference on Computer Information Systems and Industrial Applications

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In this paper, we propose an efficient soft iterative decoding method for raptor codes, which are customized for satellite broadcasting systems. The raptor codes presented in this paper are composed of a systematic LDPC code concatenated with another systematic Luby transform (LT) code. The outer codes are DVB-S2 and DVB-S2X defined forward error correction codes for interactive satellite broadcasting systems. For efficient soft decoding of the raptor codes, we represent both of the component codes with the same graph structure. Based on the Tanner graph drawn in terms of bit nodes and check nodes for each component code, we present an efficient joint iterative soft decoding method with a parallel process.

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Section: Proposed Parallel Soft Decoding For Raptor Codesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient Soft Decoding of Raptor Codes for Satellite Broadcasting System

Zhang¹,

Kim²

2015

Proceedings of the International Conference on Computer Information Systems and Industrial Applications

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“…Due to this strong advantage of rateless codes, evolved multimedia broadcast multicast services (eMBMS) introduced in the third-generation partnership project (3GPP) adopted forward error correction (FEC) schemes with rateless codes in the application layer [3]. Satellite systems are an effective means of providing MBMS, and thus utilizations of rateless codes have been considered to provide efficient satellite broadcasting services [4][5][6][7]. For example, in order to overcome the heterogeneity of the receivers and reduce the number of retransmissions, the packet level FEC scheme using LT codes was incorporated in a satellite data broadcasting system in [4].…”

Section: Introductionmentioning

confidence: 99%

“…Satellite systems are an effective means of providing MBMS, and thus utilizations of rateless codes have been considered to provide efficient satellite broadcasting services [4][5][6][7]. For example, in order to overcome the heterogeneity of the receivers and reduce the number of retransmissions, the packet level FEC scheme using LT codes was incorporated in a satellite data broadcasting system in [4]. In addition, raptor codes were investigated in combination with the digital video broadcasting via satellite (DVB-S) specification, which is one of the most popular standards for broadcasting satellite services (BSS) [5,6].…”

Section: Introductionmentioning

confidence: 99%

Soft Iterative Decoding Algorithms for Rateless Codes in Satellite Systems

2019

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The satellite system is one of the most efficient means for broadcasting due to its wide service coverage as well as the fact that it can provide high data rate services by using high frequency bands. However, there are a number of problems in the satellite system, such as a long round trip delay (RTD) and heterogeneity of the channel conditions of the earth stations. Even though utilizing adaptive coding and modulation (ACM) is almost mandatory for the satellite systems using high frequency bands due to the serious rain fading, the long RTD makes it difficult to quickly respond to channel quality information, resulting in a decrease in the efficiency of ACM. A high heterogeneity of earth stations caused by a wide service coverage also makes it difficult to apply a uniform transmission mode, and thus satellite systems require receiver-dependent transmission modes. A rateless code can be an effective means to compensate for these disadvantages of satellite systems compared to terrestrial wireless systems. This paper presents soft iterative decoding algorithms for efficient application of rateless codes in satellite systems and demonstrates that rateless codes can be effectively used for hybrid automatic repeat request schemes.

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“…fountain codes) with 10 2 -10 4 symbols long code blocks are widely used in real-time data streaming and multicasting applications such as multi-point multimedia streaming [34], satellite communication [43], ad-hoc communication over wireless sensor networks [25] and free-space optical links [17]. The rateless decoding capability of these randomized codes enables them to recover data packets across a wide range of channel loss rates, whereas their short code blocks and linear decoding complexity make them suitable for protecting real-time low-power data transports.…”

Section: Introductionmentioning

confidence: 99%

Customizing short-length LT codes with evolution strategies for video streaming protection

Hornansky¹,

Zao²

2017

Multimed Tools Appl

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Designing short-length Luby Transform (SLLT) codes to best protect video streaming and multicasting over lossy communication remains largely an empirical exercise. In this paper, we present a systematic approach to customize the decoding performance of these codes so that the protected video bitstreams may have the best playback quality over a wide range of channel loss rates. Our approach begins with the proposal of a new SLLT decoding performance model based on three parameters: decoding overhead, symbol decoding failure rate and tail probability of symbol decoding failure rate. We then formulate the design of SLLT codes as a multi-objective optimization problem, specify the design objectives in terms of goal program, and search for the most suitable codes using an augmented weighted Tchebycheff method implemented with the Covariance Matrix Adaptation Evolution Strategy (CMA-ES). Two design examples are provided to illustrate the effectiveness of our approach: (1) an SLLT postcode of a short-length raptor code that provides erasure protection to H.264 AVC bitstreams, and (2) an SLLT post-code of a rateless UEP code that supports graceful degradation of H.264 SVC playback quality. Empirical results demonstrate that the proposed method is capable of producing SLLT codes with customized decoding performance, whereas, the customized codes enable the playback pictures to attain significantly higher PSNR values at different stages of the decoding process than the pictures recovered under the protection of conventionally optimized codes.

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Advanced LT codes in satellite data broadcasting system

Cited by 6 publications

References 5 publications

Efficient Soft Decoding of Raptor Codes for Satellite Broadcasting System

Efficient Soft Decoding of Raptor Codes for Satellite Broadcasting System

Soft Iterative Decoding Algorithms for Rateless Codes in Satellite Systems

Customizing short-length LT codes with evolution strategies for video streaming protection

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