• Title/Summary/Keyword: error resilience

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Error resilience video coding of DMB video stream using AVC redundant slice (AVC 잉여슬라이스를 이용한 DMB 비디오 스트림의 오류내성부호화)

  • Hong, Sung-Hoon;Baek, Sun-Hye;Na, Nam-Woong
    • Proceedings of the Korea Information Processing Society Conference
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    • 2004.05a
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    • pp.707-710
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    • 2004
  • In the case of terrestrial DMB(Digital Multimedia Broadcasting) system that offers mobile multimedia broadcasting services, transmission error must be considered. Although DMB transmission system provides the error protection functions of convolution coding and Reed-Solomon (204,188,t=8) coding, additional error resilience video coding methods are needed to satisfy the requirement of BER lower than $10^{-8}$. In this thesis, we propose and evaluate effective error resilience coding schemes using the MPEG-4 redundant slice for MPEG-4 video services in the DMB environment. In this scheme, we analyze the drift error caused by transmission error based on the random noise concept and the redundant slice selection algorithm that selects the most influential slice in the view of the drift error increment.

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Error Resilience Method of MPEG-2 Header Parameters by using LSB Coding for Robust DTV Video Transmission (견실한 DTV 영상 전송을 위해 LSB 부호화를 이용한 MPEG-2 헤러 정보의 오류 복원 방법)

  • Lim Tae-gyun;Lee Sang-hak
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.5
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    • pp.1019-1024
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    • 2005
  • MPEG-2 achieves high compression radio, by exploiting the temporal and spatial correlations in real image sequence, using the motion compensated prediction and the transform coding, respectively. However, as the image sequence is more highly compressed, the encoded bitstream becomes more vulnerable to transmission error over the noisy channels. Furthermore, er개rs in the headers are fatal to decoding processes, because the header parameters in the video coding standard include a lot of important information connected to the syntax elements, fables, and decoding process. In this paper, we propose a new error resilience method using LSB coding for header parameters in MPEG-2 coded video transmissions. The experimental results for football and susie video sequence demonstrate that the proposed error resilience method for header parameters in MPEG-2 bitstream has good performance.

Error resilience video coding of DMB video stream using Data partitioning method. (데이터 분할방식 적용에 따른 DMB 비디오 스트림의 오류내성부호화)

  • 백선혜;나남웅;홍성훈;이봉호;함영권
    • Proceedings of the IEEK Conference
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    • 2003.11a
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    • pp.275-278
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    • 2003
  • Terrestrial DMB(Digital Multimedia Broadcasting) system is the standard that offers multimedia broadcasting services at mobile environment and is based on Eureka-147 DAB(Digital Audio Broadcasting) for transmission method. Also DMB provides the error protection method of convolution coding. In this paper, we study on the effective error resilience coding of MPEG-4 video stream over DMB system. To accomplish error resilience, we first partition one data into several data using the data partitioning, and we control the coding rate of the convolution coding according to the importance of the partitioned data. In this algorithm, we suggest and analyze the efficient rate control algorithm considering convolution code rate.

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Error resilience video coding of DMB video stream using Data partitioning method. (데이터 분할방식 적용에 따른 DMB 비디오 스트림의 오류내성부호화)

  • 백선혜;나남웅;홍성훈
    • Proceedings of the IEEK Conference
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    • 2003.11a
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    • pp.279-282
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    • 2003
  • Terrestrial DMB(Digital Multimedia Broadcasting) system is the standard that offers multimedia broadcasting services at mobile environment and is based on Eureka-147 DAB(Digital Audio Broadcasting) for transmission method. Also DMB provides the error protection method of convolution coding. In this paper, we study on the effective error resilience coding of MPEG-4 video stream over DMB system. To accomplish error resilience, we first partition one data into several data using the data partitioning, and we control the coding rate of the convolution coding according to the importance of the partitioned data. In this algorithm, we suggest and analyze the efficient rate control algorithm considering convolution code rate.

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A Study on Error Resilience of Header Parameters considering the activity of macroblock (매크로블록의 활동성을 고려한 헤더정보의 오류 복원에 관한 연구)

  • Kim, Jong-Hoon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.5
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    • pp.837-842
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    • 2008
  • Any errors that are generated in the channels and networks distort the video quality and are propagated in both the spatial and temporal domains. In particular, header errors ran result in serious visual degradation of the output video encoding/decoding schemes that can make an error resilient compressed bit-stream in error prone environments, such as mobile networks. In this paper, we proposes an header error resilience method that consider the activity of macroblock in video bitstream syntex. The extract of header error repaetedly embeds the header parameters into the least significant bits(LSB) of the quantized DCT coefficients prior to VLC. Experimental results show that the proposed error resilience method restores good image quality despite the detected error on header parameters.

Packet loss resilience methods of MPEG-4 Video (패킷망에서 MPEG-4 비디오 오류처리 최적화 방식 연구)

  • 이상조;서덕영
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2000.11b
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    • pp.15-19
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    • 2000
  • This paper is about MPEG-4 error resilience tools of video streaming on packet service(ex, Internet). It is need to packetization for MPEG-4 video transport by packet unit on MPEG-4 system, this paper suggest packetization method of minimizing packet error on packet service[1]. FEC(Forward Error Correction) and retransmission is usually used for recovery of packet loss, and this paper suggest applying these method to DMIF(Delivery Multimedia Integration Framework) for minimizing packet loss[2].

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Error Resilience Schemes of H.264/AVC for IP Datacast over DVB-H Systems (DVB-H 시스템의 IP Datacast를 위한 H.264/AVC 에러 내성 계획)

  • Jung, Woo-Suk;Kim, Jae-Seok
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.393-394
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    • 2006
  • This paper lists various error resilience tools and analyzes performance in IP Datacast over DVB-H systems and schemes are proposed. Experiments shows that, in DVB-H environment, encoding with macroblock line intra update can achieve the best error correction ability, because this tool can make full use of spatial correlation for intra prediction and reduce the requirement of bit rate.

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Multiple Description Coding using Unequal MDSQ in Wavelet Domain

  • Yoon, Eung-Sik;Park, Kwang-Pyo;Lee, Keun-Young
    • Proceedings of the IEEK Conference
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    • 2002.07a
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    • pp.281-284
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    • 2002
  • Error resilience for image coding is an important component of multimedia communication system. Error resilience schemes address loss recovery from the compression perspective. Multiple description coding (MDC) is one of the error resilience techniques promising for robust video transmission. It is the way to achieve tradeoff description such as scalar quantization, correlating transform and the quantized frame expansion. In this paper, we consider Multiple Description Scalar Quantization (MDSQ) to wavelet domain. Conventional MDSQ schemes considered description with equal weights in each sub-bands. But, we can see that the each sub-bands is unequal contribution to whole image quality. Therefore, we experiment the multiple design MDSQ table to make probability of zero index high, which gives high efficiency in arithmetic symbol coder. We also compare our proposed method with the conventional methods and show improved performance in terms of redundancy-rate-distortion.

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The effects of Resilience on employee's Innovative Work Behavior : moderating effect of Organizational Support and Organizational Error Management Culture (회복탄력성이 조직구성원의 혁신행동에 미치는 영향 - 조직지원과 실책관리문화의 조절효과 -)

  • Cho, Young-Bohk;Lee, Na-Young
    • Management & Information Systems Review
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    • v.33 no.5
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    • pp.155-169
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    • 2014
  • We meet many difficult challenges from many factors such as crime, natural disasters, social unrest, financial problems, employment, and so on. It therefore essential to cope with these negative stressful events to attain a state of personal well-being. Lately in the field of psychology and psychiatry, a concept called 'resilience' has received increasing attention. Resilience embodies the personal qualities that enable one to thrive in the face of adversity. Also it refers to the process of overcoming the negative effect of risk exposure, coping successfully with adversity, and avoiding the negative trajectories associated with risks. Resilience people were expected to do their innovative work behavior well. And SUS(supervisor support), COS(coworker support), OEMC(organizational error management culture) influence the relationship of resilience between Innovative Behavior. This study focused on three question. First, how is resilience relate to individual performance in the organization? And second, are there any moderate factors between resilience and individual performance. As the result of the hierarchical regression analysis, resilience indicates positive effects on IB and IB was predicted by interaction of resilience by SUS and OEMC. Findings in this study indicated that the level of SUS and OEMC should be considered in interpreting the resilience and Innovative Behavior.

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Error-Resilient Video Transmission Techniques over Unreliable Networks (비 신뢰성 네트워크에서 에러를 극복하는 비디오 전송 기법)

  • 노경택
    • Journal of the Korea Society of Computer and Information
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    • v.6 no.3
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    • pp.50-55
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    • 2001
  • We review error resilience techniques for real-time video transport over unreliable networks. For error control on the source coding level, each decoder has to make provisions for error detection, resynchronization. and error concealment. and we review techniques suitable for that purpose. Further, techniques are discussed for intelligent processing of acknowledgment information by the coding control to adapt the source coder to the channel. We review and compare error tracking, error confinement. and reference picture selection techniques for channel-adaptive source coding. We review how feedback-based source codings are related with the precompressed video stored on a media server

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