Transport of wireless video using separate, concatenated, and joint source-channel coding

Dyck, R.E. Van; Miller, David J.

doi:10.1109/5.790634

Cited by 54 publications

(39 citation statements)

References 84 publications

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“…Thus, we also evaluate a second tandem scheme using the (35,23) turbo code, which has a significantly lower error floor at the expense of a slight waterfall performance loss. Although at very high BERs both tandem schemes are better than our system, their error floors occur at high BERs ( for the (37,21) code, and for the (35,23) code). Therefore, at low BER levels, our system offers superior performance over both tandem schemes.…”

Section: Comparison With Tandem Schemesmentioning

confidence: 99%

Transmission of Nonuniform Memoryless Sources via Nonsystematic Turbo Codes

Zhu

Alajaji

Bajcsy

et al. 2004

IEEE Trans. Commun.

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Abstract-We investigate the joint source-channel coding problem of transmitting nonuniform memoryless sources over binary phase-shift keying-modulated additive white Gaussian noise and Rayleigh fading channels via turbo codes. In contrast to previous work, recursive nonsystematic convolutional encoders are proposed as the constituent encoders for heavily biased sources. We prove that under certain conditions, and when the length of the input source sequence tends to infinity, the encoder state distribution and the marginal output distribution of each constituent recursive convolutional encoder become asymptotically uniform, regardless of the degree of source nonuniformity. We also give a conjecture (which is empirically validated) on the condition for the higher order distribution of the encoder output to be asymptotically uniform, irrespective of the source distribution. Consequently, these conditions serve as design criteria for the choice of good encoder structures. As a result, the outputs of our selected nonsystematic turbo codes are suitably matched to the channel input, since a uniformly distributed input maximizes the channel mutual information, and hence, achieves capacity. Simulation results show substantial gains by the nonsystematic codes over previously designed systematic turbo codes; furthermore, their performance is within 0.74-1.17 dB from the Shannon limit. Finally, we compare our joint source-channel coding system with two tandem schemes which employ a fourth-order Huffman code (performing near-optimal data compression) and a turbo code that either gives excellent waterfall bit-error rate (BER) performance or good error-floor performance. At the same overall transmission rate, our system offers robust and superior performance at low BERs ( 10 4 ), while its complexity is lower.Index Terms-Additive white Gaussian noise (AWGN) and Rayleigh fading channels, joint source-channel coding, nonsystematic turbo codes, nonuniform independent and identically distributed (i.i.d.) sources, Shannon limit.Paper approved by A. K. Khandani, the Editor for Coding and Information Theory of the IEEE Communications Society.

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Section: Comparison With Tandem Schemesmentioning

confidence: 99%

Transmission of Nonuniform Memoryless Sources via Nonsystematic Turbo Codes

Zhu

Alajaji

Bajcsy

et al. 2004

IEEE Trans. Commun.

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“…Joint source and channel coding for video transmission has been extensively studied and reported in the literature, e.g. [1] [2]. Herein, we focus on how to apply this general framework to the specific application of video multicast over WLAN.…”

Section: Introductionmentioning

confidence: 99%

Cross Layer Adaptation for H.264 Video Multicasting Over Wireless Lan

Liu

Wang

2006

2006 IEEE International Conference on Multimedia and Expo

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This paper describes cross-layer optimization strategies and simulation results for H.264 video multicast over wireless LAN. The proposed scheme takes into account the varying channel conditions of multiple users, and dynamically allocates available bandwidth between source coding and channel coding. In particular, source coding parameters (intra update and quantization)and application-layer FEC code rate are chosen jointly to optimize a multicast performance criterion, based on feedbacks from all multicast receivers. Two performance criteria for video multicast are investigated and compared.

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“…In their contribution, Villasenor et al [113] presented an overview of robust video compression techniques and systems in the context of the MPEG4 standard, for example. Van Dyck and Miller [114] contributed in the field of joint video source and channel coding, an area that has attracted much attention in the recent literature, especially when amalgamating these standard video-codec-based techniques also with the modem employed.…”

Section: A State-of-the-artmentioning

confidence: 99%

Interactive cellular and cordless video telephony: State-of-the-art system design principles and expected performance

2000

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Second-generation (2G) mobile radio standards have not been designed with video communications in mind, although the employment of error-resilient, constant-bit-rate proprietary video codecs over these systems is realistic. The third-generation (3G) systems I. STATE-OF-THE-ART SYSTEM COMPONENT DEVELOPMENTS A. Introduction and OutlineThe subject of mobile radio communications has reached a state of maturity over the past two decades, as indicated by the excellent monographs by Jakes This contribution attempts to summarize a range of recent advances in the field of bandwidth-efficient wireless video communications. In this section, we commence our discourse with a brief overview of the wireless scene and, in particular, by considering the video transmission capabilities of the existing and future wireless systems. The geographical variation of the cellular channel capacity is characterized by Section II, as a motivation for invoking burst-by-burst adaptive transceivers [27]- [29]. The nature of co-channel interference (CCI)-which is the most dominant channel impairment in wireless systems-is the topic of Section III, where it is shown that the geographic variation of CCI justifies the employment of multimode transceivers, which are discussed in Section IV. Low-rate video compression aspects are reviewed in Section V, and the performance of the ITU H.263 codec is analyzed in some depth. Our discussions in Sections VI and VII are focused on the performance of reconfigurable video transceivers. Specifically, in Section VI, no power control is used-which is typically the case in cordless telephones, such as DECT and CT2-while in Section VII, power control is employed, which is characteristic of cellular systems, such as GSM [30], etc. Section VIII proposes a near-instantaneously adaptive or burst-by-burst adaptive code-division multiple-access (CDMA) scheme, which can be invoked in the context of the forthcoming 3G systems, in order to enhance their performance. Lastly, our discussions are concluded in Section IX with a range of system design guidelines. Let us now commence our overview of the range of existing and forthcoming wireless systems and their video transmission capabilities. B. Second-Generation (2G) Wireless SystemsThe existing 2G wireless systems now constitute a mature technology. Although they have not been designed with video communications in mind, with the advent of the specially designed error-resilient, fixed-rate video codecs [27]-[35] proposed by Streit et al., it is nonetheless realistic to provide videophone services over these low-rate schemes. For low-latency interactive videophony these systems have

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Transport of wireless video using separate, concatenated, and joint source-channel coding

Cited by 54 publications

References 84 publications

Transmission of Nonuniform Memoryless Sources via Nonsystematic Turbo Codes

Transmission of Nonuniform Memoryless Sources via Nonsystematic Turbo Codes

Cross Layer Adaptation for H.264 Video Multicasting Over Wireless Lan

Interactive cellular and cordless video telephony: State-of-the-art system design principles and expected performance

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