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检索条件"主题词=Joint Source-channel coding"

共 621 条记录，以下是591-600 订阅

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PREcoding AND POSTcoding SCHEMES FOR WIRELESS VIDEO TRANSMISSION IN OVERLOADED MIMO SYSTEMS 24

PRECODING AND POSTCODING SCHEMES FOR WIRELESS VIDEO TRANSMIS...

引用

24th IEEE International Conference on Image Processing (ICIP)

作者： Tashiro, Koji Lanante, Leonardo Kurosaki, Masayuki Ochi, Hiroshi Kyushu Inst Technol Grad Sch Comp Sci & Syst Engn Kitakyushu Fukuoka Japan

ISBN: (纸本)9781509021758

Image and video transmission is highly expected to proliferate with the wide spread of Wi-Fi devices and the introduction of multiple-input multiple-output (MIMO) systems. This paper proposes a novel precoder for video transmission in overloaded MIMO systems, which is based on an eigen-beam space division multiplexing (E-SDM) technique. This paper also proposes a low complexity postcoder, which detects some of data symbols by a linear approach and the others by a prevoting vector cancellation (PVC) approach. It is shown from simulation results that the proposed precoder and postcoder achieve 40 dB in peak signal-to-noise ratio while reducing the computational complexity by over 61% compared to the conventional PVC-based detection when received signal-to-noise ratio is higher than 10 dB.

关键词： Overloaded MIMO Video Transmission E-SDM joint source-channel coding

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Lossy source-channel Communication over a Phase-Incoherent Interference Relay channel 2012

Lossy Source-Channel Communication over a Phase-Incoherent I...

引用

IEEE International Symposium on Information Theory

作者： Saffar, H. Ebrahimzadeh Khuzani, M. Badiei Mitran, P. Univ Waterloo Waterloo ON N2L 3G1 Canada

ISBN: (纸本)9781467325790

We study the lossy communication of a bivariate Gaussian source over an interference channel with the presence of a helping relay. We assume that the wireless links introduce random phase shifts which are unknown to the transmitters (including the relay) and call the channel a phase incoherent interference relay channel (PI-IRC). We derive inner and outer bounds for the achievable distortion region, where the inner bound is derived under specific strong interference conditions as well as strong gain conditions between transmitters and the relay. When the sources are correlated, we find an approximate achievable distortion region in the high SNR regime. In case of independent sources, the bounds are tight and by explicitly providing the achievable distortion region, we show that a separation theorem results for the PI-IRC under strong interference conditions. By removing the relay, the result also specializes to an interference channel.

关键词： joint source-channel coding distortion region interference channel interference relay channel phase uncertainty correlated sources

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channel-CONFIGURABLE DEEP WIRELESS SPEECH TRANSMISSION 25

CHANNEL-CONFIGURABLE DEEP WIRELESS SPEECH TRANSMISSION

引用

IEEE Wireless Communications and Networking Conference (IEEE WCNC)

作者： Bokaei, Mohammad Jensen, Jesper Doclo, Simon Ostergaard, Jan Aalborg Univ Aalborg Denmark Oticon AS Copenhagen Denmark Carl von Ossietzky Univ Oldenburg Oldenburg Germany

ISBN: (纸本)9798350303582;9798350303599

The proliferation of edge-based wireless speech applications necessitates the development of resource-efficient, low-latency speech communication systems capable of functioning across diverse communication channel conditions. Ensuring intelligible speech communication under conditions of constrained resources and low-latency presents a challenging problem within the domain of speech transmission. In this paper, we introduce a very low-latency configurable speech transmission system leveraging joint source-channel coding and deep neural networks (DNNs). Our proposed system is a unified deep neural network system engineered to operate effectively across a wide range of wireless communication channel scenarios. The system encompasses both a joint source-channel encoder and a joint source-channel decoder, each with access to channel state information (CSI). In this context, CSI signifies the type of fading in the wireless channel. Notably, our system has a total latency of 2 ms. Through extensive simulations, we empirically demonstrate that the proposed configurable system closely approximates the performance of ideal systems specifically tailored to individual wireless channel scenarios. Our evaluation is rooted in the assessment of instrumental measures of speech quality and intelligibility, affirming the efficacy of our system in diverse and resource-constrained communication contexts.

关键词： low-latency joint source-channel coding speech transmission edge communication

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The Evaluation of Gain Of Statistical Modulation Method on the Example of QAM16 for Input Data with Exponential Distribution

The Evaluation of Gain Of Statistical Modulation Method on t...

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Wave Electronics and its Application in Information and Telecommunication Systems (WECONF)

作者： Sergeev, A. V. Shanyazov, R. R. Ilina, D. V. Bashun, V. V. St Petersburg State Univ Aerosp Instrumentat St Petersburg Russia

This paper concerns new effective method of joint data coding/ modulation which may improve energy-efficiency and energy savings of modern wireless transmission systems. The method require a priori knowledge of input ... 详细信息

ISBN: (纸本)9781538676325

关键词： Quadrature amplitude modulation joint source-channel coding QAM. SQAM modulation IoT

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MULTIRESOLUTION MODULATION FOR EFFICIENT BROADCAST OF INFORMATION

MULTIRESOLUTION MODULATION FOR EFFICIENT BROADCAST OF INFORM...

引用

Conference on Visual Communications and Image Processing 94

作者： GRUNDSTROM, M RENFORS, M TAMPERE UNIV TECHNOL DEPT INFORMAT TECHNOLSF-33101 TAMPEREFINLAND

ISBN: (纸本)081941638X

Methods for reliable transmission of information, especially digital television, are considered. In the broadcast channel, several different receiver configurations and channel conditions make an optimization of the channel coding practically impossible. To efficiently utilize available spectrum and to allow robust reception in adverse channel conditions, joint source- channel coding is applied. This is achieved utilizing multiresolution modulation combined with unequal error protection in the channel coding part and data prioritization in source coder. These design parameters for the joint system are considered. The emphasis of this paper is on the modulation part. Multiresolution 32 QAM is presented. Simulations show good performance in the additive white gaussian noise channel and, moreover, results in multipath fading channel are encouraging as far as high priority level of the data is considered.

关键词： joint source-channel coding MULTIRESOLUTION MODULATION UNEQUAL ERROR PROTECTION DIGITAL TELEVISION

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ANALOG MULTIPLE DESCRIPTIONS: A ZERO-DELAY source-channel coding APPROACH

ANALOG MULTIPLE DESCRIPTIONS: A ZERO-DELAY SOURCE-CHANNEL CO...

引用

IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Mustafa Said Mehmetoglu Emrah Akyol Kenneth Rose Electrical and Computer Engineering University of California Santa Barbara CA 93106 USA Coordinated Science Laboratory University of Illinois at Urbana-Champaign Urbana IL 61801 USA

ISBN: (纸本)9781479999897

This paper extends the well-known source coding problem of multiple descriptions, in its general and basic setting, to analog source-channel coding scenarios. Encoding-decoding functions that optimally map between the (possibly continuous valued) source and the channel spaces are numerically derived. The main technical tool is a non-convex optimization method, namely, deterministic annealing, which has recently been successfully used in other mapping optimization problems. The obtained functions exhibit several interesting structural properties, map multiple source intervals to the same interval in the channel space, and consistently outperform the known competing mapping techniques.

关键词： joint source-channel coding multiple descriptions analog mappings zero-delay communications Combined source-channel coding channel spacing MAPPING(MATHEMATICAL) Analog optimization method Structural properties code and decode

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A NOVEL ERROR RESILIENT joint sourcechannel coding SCHEME FOR IMAGE TRANSMISSION OVER ERROR PRONE channelS

A NOVEL ERROR RESILIENT JOINT SOURCECHANNEL CODING SCHEME FO...

引用

2009 2nd IEEE International Conference on Broadband Network & Multimedia Technology（IC-BNMT2009）

作者： Xue Guodong 1,Hao Chenxi 2,Zhang Wenbo 1,Zou Jun 3 1.School of information and communication engineering 2.School of computer science and technology Beijing University of Posts and Telecommunications,Beijing,China 3.IBM China Software Development Laboratory (CDL),Beijing,China

In this paper,we proposed a double-level error resilient joint source-channel coding scheme for image ***,we inserted one coordinative component named error resilient entropy coding (EREC) between source coding and channel coding to achieve additional error resilient *** on the novel architecture,we proved that,in the aspects of computational complexity,coding redundancy and furthermore the decoding performance of image transmission,our scheme outperformed either separate source and channel coding scheme or joint source-channel coding scheme with synchronization words.

关键词： double-level error resilient capability joint source-channel coding image transmission error prone channels

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A Practical FEC Code Rate Decision Scheme Based on joint source-channel Distortion Model

A Practical FEC Code Rate Decision Scheme Based on Joint Sou...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Jung, Tae-jun Seo, Kwang-deok Jeong, Yo-won Kim, Chang Ki Yonsei Univ Wonju Gangwon South Korea Samsung Elect Corp Suwon South Korea ETRI Smart TV Media Res Team Daejeon South Korea

ISBN: (纸本)9781479934324

We propose a practical FEC code rate decision scheme based on joint source-channel distortion model. The conventional FEC code rate decision schemes using analytical source coding distortion model and channel-induced distortion model are usually complex, and typically employ the process of model parameter training which involves potentially high computational complexity and implementation cost. Since the proposed joint model is expressed as a simple closed form and has a small number of scene dependent model parameters, a video sender using the model can be easily implemented. It is shown by simulations that the proposed method can accurately estimate the optimal FEC code rate with low computational complexity.

关键词： FEC code rate decision forward error correction source-channel modeling joint source-channel coding

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A decision theoretic framework for real-time communication 43

A decision theoretic framework for real-time communication

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43rd Annual Allerton Conference on Communication, Control and Computing 2005

作者： Mahajan, Aditya Teneketzis, Demosthenis Department of EECS University of Michigan Ann ArborMI United States

ISBN: (纸本)9781604234916

We consider a communication system in which the outputs of a Markov source are encoded and decoded in real-time by a finite memory receiver, and the distortion measure does not tolerate delays. The objective is to choose designs, i.e. realtime encoding, decoding and memory update strategies that minimize a total expected distortion measure. This is a dynamic team problem with non-classical information structure [7]. We use the structural results of [4] to develop a sequential decomposition for the finite and infinite horizon problems. Thus, we obtain a systematic methodology for the determination of jointly optimal encoding decoding and memory update strategies for real-time point-to-point communication.

关键词： Finite-delay communication joint source-channel coding Markov decision theory Real-time communication Zero-delay communication

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Dynamic Rate Allocation with Variable Quantization in Multi-Sensor Wyner-Ziv Video coding Systems

Dynamic Rate Allocation with Variable Quantization in Multi-...

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3rd International Symposium on Communications, Control, and Signal Processing (ISCCSP 2008), vol.1

作者： C. Yaacoub J. Farah B. Pesquet-Popescu Faculty of Sciences and Computer Engineering Holy Spirit University of Kaslik Jounieh Lebanon Department of Signal and Image Processing Ecole Nationale Supérieure des TéIécommunications Paris France

In this paper, we present a novel algorithm for dynamic quantization in distributed Wyner-Ziv video coding. In contrast with previous work where the quantization parameter is fixed and a feedback channel is used, our proposed technique relies on theoretical calculations to jointly determine the number of quantization levels along with a suitable compression rate for each video frame. It employs a cross-layer approach that dynamically allocates unequal transmission rates for different users by taking into account the amount of motion in the captured video scenes on one hand and the transmission conditions for each sensor on the other. The application of this algorithm in a wireless video sensor network shows a significant improvement in the system performance when compared to a traditional system that allocates equal channel resources with a fixed quantization parameter.

关键词： Dynamic quantization joint source-channel coding Rate allocation Wireless video sensor network Wyner-Ziv coding

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