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Scalable Video Coding (SVC) enables the partition of video data into layers of different priorities for adapting to both the diversities of terminal capabilities and the variation of network transmission mediums. It is more desirable that more important video data can be recovered with higher probabilities. In this paper, we propose a lightweight inter-layer protection scheme for SVC transmission,...
The main challenge for provisioning of Mobile TV services is to overcome long burst errors as are often found in mobile reception conditions. Long time interleaving can be implemented by means of Application Layer FEC (AL-FEC) to increase the time diversity of the signal and thereby its robustness against burst errors. The main obstacle of long time interleaving for streaming services is the increase...
In this paper we address the issues of timeliness and transmission reliability of existing industrial communication standards. We combine a Forward Error Correction coding scheme on the Medium Access Control layer with a lightweight routing protocol to form an IEEE 802.15.4-conformable solution, which can be implemented into already existing hardware without violating the standard. After laying the...
Aiming at poor channel reliability and topology dynamic variation in the wireless sensor network transmission. Based on the existing error correction algorithm, a new improved error control mechanism is proposed in this paper based on network coding, and the simulation experiment also shows its feasibility.
Although wide area wireless network capacity is growing significantly, the consumer demand for popular multimedia content delivered to mobile devices over these networks is growing even faster. An attractive alternative is to deliver multimedia content via broadcast, thereby economizing on the usage of network capacity. We describe best practice techniques for using forward error correction and interleaving...
Remote Data Checking (RDC) allows clients to efficiently check the integrity of data stored at untrusted servers. This allows data owners to assess the risk of outsourcing data in the cloud, making RDC a valuable tool for data auditing. A robust RDC scheme incorporates mechanisms to mitigate arbitrary amounts of data corruption. In particular, protection against small corruptions (i.e., bytes or even...
A combination of error correction and error detection for channel coding under additive white Gaussian noise (AWGN) is proposed, where the error detection is based on the statistics of a metric, that is defined as a function of the received and the decoded data stream, hence, no additional redundancy is required. This approach is especially useful for applications, where short block lengths are applied,...
In this paper, we propose a soft-decision-based FEC scheme which is the concatenation of a non-binary LDPC (NB-LDPC) code and hard-decision FEC code having a compatibility with existing OTU-4 frame structure. The proposed concatenated NB-LDPC + RS frame structure is also provided and the entire frame size is 18,368 bytes. The proposed NB-LDPC(2304,2048) code over GF(24) provides a superior performance...
Noise and interference make a substantial impact on wireless transmissions in industrial environments, resulting in frequent erroneous packet deliveries. Existing industrial communication standards adopt the IEEE 802.15.4 specification, which provides no means to correct the detected errors. We propose an IEEE 802.15.4-compliant Forward Error Correction-based approach that can be easily retrofitted...
Screen is becoming a new dimension in cloud computing platforms, and low latency screen sharing in unreliable networks is becoming more and more important. Due to the different characteristics between the screen codecs and video codecs, current transmission technologies on low-latency video streaming cannot be directly applied to screen sharing. So in this paper we first theoretically analyze the...
For guaranteeing quasi-error free delivery of realtime multicast services over wireless networks, an efficient greedy algorithm is proposed for optimizing the parameters of a HARQ scheme with rateless codes under strict delay and bandwidth constraints. We take systematic Raptor codes as an example for analyzing the optimum performance of the HARQ scheme. The results show that the optimum performance...
This paper describes the implementation of a fast information encoder and decoder for UHF radio considering the trade-off of speed of operation and storage space. (24, 12, 8) Golay code was implemented on an 8051 core based 8-bit microcontroller with a speed of around 60MHz. The different available techniques to encode and decode Golay codes are discussed. A comparative study of the implementation...
The paper observes transmission of a message protected by its symmetric cryptographic check values, as Message Authentication Code, over a noisy channel. A forward error correcting channel code is assumed, for reduction of the error rate, but without a repeat mechanism to correct the remaining errors (ARQ). The uncorrected errors cause the rejection of messages with a wrong MAC. A method will be presented,...
In current and future wireless standards, such as WiMAX, 3GPP-LTE or LTE-Advanced, receiver terminals have to support numerous operating modes for each protocol [1], as well as sophisticated transmission techniques, especially enhanced MIMO detection and iterative forward error correction (FEC). MIMO detection and FEC belong to the most computationally complex parts of the receiver-side baseband signal...
Enhancing Forward Error Correction (FEC) is necessary to recover from physical impairments faced by high order modulation transmission in long haul networks. However, the heavy complexity of Soft Decision (SD) FEC increases the power consumed at the receiver side. We present a technique that adjusts the FEC consumption according to each connection path length and highlight the potential energy saving...
The various codes are used for the error detection and correction in the field of communication. Some are for the single bit error and some are for the multiple bits error. Reed-Muller algorithm realizes the ability of multiple bits error detection and correction. With the superior error correction capability, these codes have initiated wide scale interests in satellite communication, wireless communication,...
Packet-Level Forward Error Correction (PL-FEC) techniques are widely applied to multimedia communications. To deal with the burst loss problem in packet transmissions over networks, PL-FEC 1-D interleaved parity codes are used in Real-time Transport Protocol (RTP), which uses User Datagram Protocol (UDP) to transport packets. However, the codes' error correction performance, encoding rate, decoding...
An LDPC based soft-decision FEC having a NCG of 10.8dB has been implemented in a coherent ASIC. Greater gain and the interplay with nonlinearity equalizers are anticipated for the real deployment of 100G and beyond.
Prior research on wireless multicast video streaming has addressed the risk of feedback implosion when providing adaptive forward error correction (FEC). This approach has not been adopted by providers, who may either stick to unicast streaming or use a sufficient level of application layer FEC to avoid the need for adaptation. Instead in this paper, an adaptive unicast rateless channel coding scheme...
This paper presents the algorithms and corresponding hardware architectures developed in the context of the nexgen miliwave project, that compose the digital baseband processor of a 60GHz point-to-point link. The nexgen baseband processor provides all basic functionality required from a digital transmitter and receiver, including filtering, synchronization, equalization, and error correction. The...
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