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This paper proposes a new distributed Amplify-and-Forward (AF) scheme which is integrated with the Ring-Trellis Coded Modulation (TCM) codes in order to achieve both high spectral efficiency and large diversity gain. In the distributed AF scheme, more users cooperate with each other. Fach user still uses half of its transmission freedom for relaying others' signal. However, different to the conventional...
This paper presents a novel architecture for LDPC codes using wave pipelining technique. LDPC approaches the near Shannon limit and it was analyzed using sum-product algorithm. Wave pipelining technique overcomes the drawbacks of conventional pipelining, namely latency overhead and area overhead. The proposed architecture is designed with different stages of pipelining and the performance is compared...
In this paper, we propose the design method and the structure of a decoder with shortened cyclic code for radio data systems (RDS). Without microprocessor the logic gates are used to implement the hardware of the decoder, moreover, the decoder not only can decode the received message of RDS, but also has the functions of synchronization, error detection and error correction. The proposed decoder includes...
In this paper, a very high-throughput and area efficient hardware decoder of the binary (23, 12, 7) Golay code is presented. The key feature of this proposed algorithm is fast determination of the error positions through the analysis on the weight of syndromes without large operations of finite fields. Comparing with the algorithm using one syndrome, the proposed algorithm is more suitable for the...
In this paper we present a new method for designing of decoder in quantum computing based on field effect in nuclear spin. We use nuclear property of hydrogen in order to logical truth value. Computational results demonstrator the accuracy and efficiency, that can be obtained with the use of these models, are presented.
Free Lossless Audio Codec (FLAC) format is getting more and more popular through the Internet; however, up to now, it is hard to find a decoder chip supporting this kind of format in the market and most of the FLAC decoding systems in software are based on personal computer (PC). In this paper, an embedded FLAC decoder system was designed, and the embedded development platform of ARM920T was built...
Recent video coding research gives birth to the latest video coding standard H.264/AVC whose compression performance significantly exceeds previous standards with more than 50%. But as compared with the MPEG-4, the capability of coding arbitrarily shaped objects is absent from the latest standard. In this paper, we propose a new arbitrarily shaped object coding codec including encoder and decoder...
This paper describes the design and implementation of a hardware module to calculate the decimal floating-point (DFP) multiplication compliant with the current IEEE-754-2008 standard. The design proposed is made up of independent stages: IEEE-754 coder / decoder, decimal multiplier and rounding. The decimal multiplication is based on a previously designed BCD multiplier. The novelty is the design...
In this paper, a new image compression scheme by introducing visual patterns to interpolative vector quantization (IVQ) is proposed. The goal is to introduce visual patterns on designing the codebook, where only removed details that contain visual patterns and their original counterparts as pairs are trained. In the proposed scheme first input images are down-sampled by ideal filter. Then, the down...
A completely new scheme for quaternary logic is proposed. Instead of conventional fuzzy logic or Galois Field theory, the logic system is based on the extension of Boolean algebra. The logic is capable of handling both quaternary and coupled-binary inputs, where binary operands are coupled in pairs to form quaternary entities. All necessary operators are defined and several theorems and properties...
A new scheme for quaternary logic is proposed. The logic system is based on the extension of Boolean algebra, instead of conventional Fuzzy logic or Galois Field theory. This logic mainly focuses on the capability of handling coupled-binary input, where binary operands are coupled in pairs to form multivalued entities. Several operators are defined and a fully operational algebra is developed. To...
This paper proposes a novel framework called distributed compressed video sensing (DISCOS) - a solution for distributed video coding (DVC) based on the recently emerging compressed sensing theory. The DISCOS framework compressively samples each video frame independently at the encoder. However, it recovers video frames jointly at the decoder by exploiting an interframe sparsity model and by performing...
In this paper we address the problem of transmission of correlated sources over a fast fading multiple access channel (MAC) with partial channel state information available at both the encoders and the decoder. We provide sufficient conditions for transmission with given distortions. Next these conditions are specialized to a Gaussian MAC (GMAC). We provide the optimal power allocation strategy and...
Popular Wyner-Ziv (WZ) video coders divide the sequences into intra key frames and WZ frames. In this paper, we propose a new block-based coding system that uses hybrid intra and WZ frames. A part of each block is first intra coded and the other parts are WZ coded, in a number of steps. There is no need for key frames; the key information is controlled at the block level and used for motion estimation...
An analysis-based approach for unequal loss-protected multiple description coding (packetization) of the scalable (prioritized / progressive) source code streams is proposed. For a given number of packets (descriptions) of the known size, unequal loss-protected packetization leads to segment the scalable code stream, such that the source can be reconstructed with the maximum possible fidelity at the...
At low bit-rate video communications, packet loss may easily cause whole-frame loss that, in return, leads to annoying frame drop phenomenon. In this paper, a novel error concealment algorithm is specifically developed for stereoscopic video, called the disparity-based frame difference projection (DFDP), to recover the lost frames at the decoder. The proposed DFDP contains three key components: 1)...
In this paper we present an adaptive compression technique that reduce the power consumption when compare to the compressed and original uncompressed data. We adapt a compression method by distances between transmitter and receiver. We show that compressing data for all of the distances is not useful. Experimental results indicate that our approach save power consumption as much as 24%. We also add...
A novel video coding scheme based on leaky prediction is proposed and its superiority against conventional predictive video coding is demonstrated in environments with moderate to heavy packet loss. The strength of the scheme stems from the fact that it explicitly takes into account the two modes of operation (packet loss or no packet loss) at the decoder and optimizes the corresponding reconstruction...
A modified algorithm for two-dimensional TPC decoding is proposed to reduce the wrong frame rate in the (16,11,4)2 Turbo Product Code (TPC) decoding in this paper. It is based on the hard decision decoding, including a chooser and a parallel decoding architecture that one is column-row and the other is row-column. The Monte-Carlo simulation shows that 30% wrong frame is eliminated and the implementation...
In this paper, a turbo-based distributed joint source-channel coding scheme, for efficient compression and communication of two dependent sources with time memory over noisy channels, is presented. Specifically, we consider the asymmetric case for two binary sources, where one of the sources is available at the decoder as side information. The problem is of particular interest for low complexity compression...
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