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This paper maps channel codes at the application layer to data-partitioned video so that more important compressed data are protected in a closed-loop communication scheme. In particular, window-growth rateless codes are a priority-scalable form of Forward Error Correction that also provide incremental protection to streamed video. The paper introduces a detailed scheme for achieving this according...
Our recently proposed wavelet-based L-infinite-constrained coding approach for meshes ensures that the maximum error between the vertex positions in the original and decoded meshes is guaranteed to be lower than a given upper bound. Instantiations of both L-2 and L-infinite coding approaches are demonstrated for MESHGRID, which is a scalable 3D object encoding system, part of MPEG-4 AFX. In this survey...
This paper mostly concerned with the various packet size effect on performance of erasure correctable codes for cognitive radio. Among these types of codes we tried to simulate Raptor code to discover its suitability for assumed erasure channel in cognitive radio. The main target after supporting the functionality of coding-based cognitive radio would be finding the appropriate packet length that...
Since the pioneering research work of Ahlswede et al. in 2000, Network Coding (NC) has rapidly emerged as a major research area in electrical engineering and computer science due to its wide applicability to communication through real networks. The many contributions available in the literature to date, ranging from pure theoretical studies on fundamental limits to practical experimentations in real-world...
Video streaming is challenging in wireless networks due to the high loss rate and limited bandwidth. In video sequences, different part has different importance for reconstruction. Based on H.264 error resilient tool of datapartitioning, we apply UEP (Unequal Error Protection) to different data partitions. RS (Reed Solomon) coding is used for data partition A, whereas simple repeat-packet coding for...
The projective geometry (PG) based low density parity check (LDPC) codes are gaining popularity due to their ease of encoding and decoding by the simple majority logic technique. These codes have a flurry of other useful properties, making them ideal candidates/codes for error correction for future wireless applications. This paper brings out a detailed study on the performance of PG codes for different...
A non-blind two-channel time-frequency digital bits audio watermarking scheme with error-correcting code is described in this paper. The proposed method operates by encoding the watermark bits with cyclic code before embedding them into the audio signal. Time-frequency compression-expansion technique is used to embed the watermark bits. The coefficients to be deleted or added for the time-frequency...
Multicast transmission enables a sender to distribute data to multiple intended receivers simultaneously. However, the multicast transmission should be reliable in erasure channel. Forward Error Correction (FEC) enables the lost packets to be recovered from some extra redundant packets without any retransmission. In this paper, we propose a new FEC codes, called Polynomial Interpolation codes (PI...
Classical results from the 1970's state that w.h.p. a random subspace of N-dimensional Euclidean space of proportional (linear in N) dimension is ??well-spread?? in the sense that vectors in the subspace have their f2 mass smoothly spread over a linear number of coordinates. Such well-spread subspaces are intimately connected to low distortion embeddings, compressed sensing matrices, and error-correction...
We study network error correction with unequal link capacities. Previous results on network error correction assume unit link capacities. We consider network error correction codes that can correct arbitrary errors occurring on up to z links. We find the capacity of a network consisting of parallel links, and a generalized Singleton outer bound for any arbitrary network. We show by example that linear...
Bose and Al-Bassam designed quasi-systematic single asymmetric error-correcting codes that are able to encode k information bits in a systematic way, but cannot encode all 2/sup k/ information words. However, "Construction I" of their paper does not provide an efficient way for computing the number of codewords. In this correspondence, we derive a recursive relation based on generating functions...
Concatenated coding is shown to improve the multiple access capability of a frequency hopped spread spectrum multiple access (FH SSMA) packet radio. Closed form expressions for the number of simultaneous users and system throughput are developed. The influence of the concatenated coding parameters on the system performance is evaluated. The multiple access capability of a FH SSMA system with concatenated...
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