scholarly journals Application Layer Systematic Network Coding for Sliced H.264/AVC Video Streaming

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Sajid Nazir ◽  
Vladimir Stanković ◽  
Ivan Andonović ◽  
Dejan Vukobratović
Keyword(s):  
Forward Error Correction ◽  
Linear Codes ◽  
Unequal Error Protection ◽  
Video Data ◽  
Application Layer ◽  
Error Protection ◽  
Coding Scheme ◽  
Partitioned Data ◽  
Advanced Video Coding ◽  
Forward Error

Application Layer Forward Error Correction (AL-FEC) with rateless codes can be applied to protect the video data over lossy channels. Expanding Window Random Linear Codes (EW RLCs) are a flexible unequal error protection fountain coding scheme which can provide prioritized data transmission. In this paper, we propose a system that exploits systematic EW RLC for H.264/Advanced Video Coding (AVC) slice-partitioned data. The system prioritizes slices based on their PSNR contribution to reconstruction as well as temporal significance. Simulation results demonstrate usefulness of using relative slice priority with systematic codes for multimedia broadcast applications.

scholarly journals LDPC FEC Code Extension for Unequal Error Protection in DVB-T2 System: Design and Evaluation

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Lukasz Kondrad ◽  
Imed Bouazizi ◽  
Moncef Gabbouj
Keyword(s):  
Forward Error Correction ◽  
First Generation ◽  
Design Procedure ◽  
Physical Layer ◽  
Unequal Error Protection ◽  
Error Protection ◽  
Transmission Scheme ◽  
Video Broadcasting ◽  
Code Extension ◽  
Forward Error

The Digital Video Broadcasting organisation has recently introduced the second generation of terrestrial broadcast transmission standards, DVB-T2. The newly introduced tools ensure significant gain in performance of DVB-T2 compared to the first generation variant of the standard. One of these tools is the new physical layer concatenated forward error correction code. The inner among the concatenated codes is the Low-Density Parity Check code. The paper proposes a method to extend this code so varying coding strength inside one physical layer pipe of DVB-T2 is enabled in a backward compatible way. As consequence, unequal error protection transmission scheme at a physical layer of DVB-T2 can be efficiently deployed. The paper provides a step-by-step description of the design procedure of the extension. Moreover, the modification to the processing chain and the framing structure of DVB-T2, that ensures backward compatibility to the legacy system, is provided. The proposed method is evaluated under AWGN channel and TU6 channel. Experiments performed on four different video sequences show significant improvements in quality of experience when the proposed extension is used to achieve UEP transmission.

scholarly journals Protecting H.264/AVC Data-Partitioned Video Streams over Broadband WiMAX

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Laith Al-Jobouri ◽  
Martin Fleury ◽  
Mohammed Ghanbari
Keyword(s):  
Video Streaming ◽  
Forward Error Correction ◽  
Video Quality ◽  
Unequal Error Protection ◽  
Data Partitioning ◽  
Video Data ◽  
Compressed Video ◽  
Error Protection ◽  
Potential Threat ◽  
Video Services

Broadband wireless technology, though aimed at video services, also poses a potential threat to video services, as wireless channels are prone to error bursts. In this paper, an adaptive, application-layer Forward Error Correction (FEC) scheme protects H.264/AVC data-partitioned video. Data partitioning is the division of a compressed video stream into partitions of differing decoding importance. The paper determines whether equal error protection (EEP) through FEC of all partition types or unequal error protection (UEP) of the more important partition type is preferable. The paper finds that, though UEP offers a small reduction in bitrate, if EEP is employed, there are significant gains (several dBs) in video quality. Overhead from using EEP rather than UEP was found to be around 1% of the overall bitrate. Given that data partitioning already reduces errors through packet size reduction and differentiation of coding data, EEP with data partitioning is a practical means of protecting user-based video streaming. The gain from employing EEP is shown to be higher quality video to the user, which will result in a greater take-up of video services. The results have implications for other forms of prioritized video streaming.

Application Layer Forward Error Correction for Mobile Multimedia Broadcasting

2008 ◽  
pp. 239-278 ◽  
Author(s):  
Thomas Stockhammer ◽  
Amin Shokrollahi ◽  
Mark Watson ◽  
Michael Luby ◽  
Tiago Gasiba
Keyword(s):  
Error Correction ◽  
Forward Error Correction ◽  
Mobile Multimedia ◽  
Application Layer ◽  
Forward Error

scholarly journals COMPARISON OF THE PROBABILISTIC CHARACTERISTICS OF 8-BIT CODES WITH FORWARD ERROR CORRECTION

Telecom IT ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 21-30
Author(s):  
S. Vladimirov
Keyword(s):  
Error Correction ◽  
Forward Error Correction ◽  
Communication Channels ◽  
Error Correcting Codes ◽  
Transmission System ◽  
Practical Relevance ◽  
Research Subject ◽  
Application Layer ◽  
Characteristics Method ◽  
Forward Error

Research subject. The article presents the results of comparing different 8-bit error-correcting codes by their probabilistic characteristics. Method. Simulation was performed to determine the probabilistic characteristics of 8-bit error-correcting codes. The principles of their coding and decoding are considered. Core results. The probabilistic characteristics of 8-bit error-correcting codes are identified and presented. Recommendations for their application are developed depending on the structure of the using transmission system. Practical relevance. The application of the considered codes for the construction of transmission systems on devices with limited computing resources is proposed. The applicability of these codes in the development of application layer byte protocols that require the use of forward error correction mechanisms in communication channels is noted.

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