&lt;title&gt;Real-time software-based end-to-end wireless visual communications simulation platform&lt;/title&gt;

Chen, Ting-Chung; Chang, Li-Fung; Wong, Andria H.; Sun, Ming–Ting; Hsing, T.R.

doi:10.1117/12.206639

Cited by 25 publications

(3 citation statements)

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“…The next sections in frame (n − 1) and frame (n) are estimated from the position of the first section in frame (n − 1). In this work, to validate the accuracy in locating burst sections of wireless channel, the estimated burst locations are compared with the actual burst locations of wireless channel which are generated from wireless channel simulator [18]. Figure 5 shows actual burst locations of wireless channel at different bit rates.…”

Section: Proposed Methods To Locate the Error Burst Positionsmentioning

confidence: 99%

New Error Resilience Technique Using Adaptive FMO and Intra Refresh for H.264 Video Transmission

Aramvith

Miyanaga

2011

IEICE Trans. Fundamentals

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SUMMARYIn this paper, we propose an error resilience scheme for wireless video coding based on adaptive flexible macroblock ordering (FMO) and intra refresh. An FMO explicit map is generated frame-byframe by using prior information. This information involves estimated locations of guard and burst sections in the channel and estimated effect of error propagation (EEP) from the previous frame to the current frame. In addition, the role of the current frame in propagating an error to the next frame is also considered. A suitable intra refresh rate which is adaptive to the channel state is used to reduce the dependence between frames and thus can stop the EEP. The results in experiments show that the proposed method gains some improvements in terms of peak signal-to-noise rate (PSNR) as compared with some other methods that have not considered the channel condition and the error propagation in generating an FMO map. key words: H.264, FMO, error propagation, intra refresh, error resilience

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Section: Proposed Methods To Locate the Error Burst Positionsmentioning

confidence: 99%

New Error Resilience Technique Using Adaptive FMO and Intra Refresh for H.264 Video Transmission

Aramvith

Miyanaga

2011

IEICE Trans. Fundamentals

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“…Eryurtlu et al [138], [139] from the University of Surrey in the U.K. proposed various improvements to the H.263 scheme. Further important contributions in the field were due to Chen et al [164], Illgner and Lappe [165], Zhang [166], Ibaraki et al [167], and Watanabe et al [168]. Vector quantization arrangements were favored by Ramamurthy and Gersho [173] as well as by Torres and Huguet [174].…”

Section: A Advances In Low-rate Video Compressionmentioning

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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“…Färber et al [167]- [170] also contributed substantially toward advancing the state of the art in the context of the H.263 codec as well as in motion compensation [168], [169], as did Eryurtlu, Sadka, and Kondoz [174]- [175]. Further important contributions in the field were due to Chen et al [181], Illgner and Lappe [182], Zhang [183], Ibaraki et al [184], Watanabe et al [185], the MPEG-4 consortium's endeavors [71], and the efforts of the Mobile Audio-Video Terminal Consortium. VQ-based schemes were advocated by Ramamurthy and Gersho [149], as well as by Torres and Huguet [150].…”

Section: A Motivation and Backgroundmentioning

confidence: 99%

Bandwidth-efficient wireless multimedia communications

Hanzo

1998

Proc. IEEE

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<title>Real-time software-based end-to-end wireless visual communications simulation platform</title>

Cited by 25 publications

References 1 publication

New Error Resilience Technique Using Adaptive FMO and Intra Refresh for H.264 Video Transmission

New Error Resilience Technique Using Adaptive FMO and Intra Refresh for H.264 Video Transmission

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

Bandwidth-efficient wireless multimedia communications

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