Adaptive intra block update for robust transmission of H.263

Liao, Jingsheng; Villasenor, John

doi:10.1109/76.825855

Cited by 53 publications

(28 citation statements)

References 6 publications

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“…This vulnerability makes error resilience at the video encoder essential. Intra update, also called intra refreshing, of macroblocks (MBs) is one approach for video error resilience and protection [27]. An intra coded MB does not need information from previous frames which may have already been corrupted by channel errors.…”

Section: Rate-distortion (R-d) Model For Multimedia Applicationsmentioning

confidence: 99%

Application layer QoS optimization for multimedia transmission over cognitive radio networks

Sun

Krishnamurthy

et al. 2010

Wireless Netw

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In cognitive radio (CR) networks, the perceived reduction of application layer quality of service (QoS), such as multimedia distortion, by secondary users may impede the success of CR technologies. Most previous work in CR networks ignores application layer QoS. In this paper we take an integrated design approach to jointly optimize multimedia intra refreshing rate, an application layer parameter, together with access strategy, and spectrum sensing for multimedia transmission in a CR system with time varying wireless channels. Primary network usage and channel gain are modeled as a finite state Markov process. With channel sensing and channel state information errors, the system state cannot be directly observed. We formulate the QoS optimization problem as a partially observable Markov decision process (POMDP). A low complexity dynamic programming framework is presented to obtain the optimal policy. Simulation results show the effectiveness of the proposed scheme.

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Section: Rate-distortion (R-d) Model For Multimedia Applicationsmentioning

confidence: 99%

Application layer QoS optimization for multimedia transmission over cognitive radio networks

Sun

Krishnamurthy

et al. 2010

Wireless Netw

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“…A wide range of studies has been conducted in this category of error control [3]. Among them, forced intra macroblock (MB) refresh is the most common approach that can cope with error propagation quite efficiently [4]. However, forcing the use of intra coding instead of selecting the optimal mode reduces the coding efficiency.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of maximum likelihood decoding combined with error resilient video coding

Golaghazadeh

Coulombe

Labeau

et al. 2014

2014 IEEE Symposium on Industrial Electronics &Amp; Applications (ISIEA)

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Abstract-In this work, we study the performance of the maximum likelihood decoding (MLD) approach in error-resilient video sequences to establish the performance improvement of this method compared to well-known error concealment approaches. In particular, we consider various interactions between error resilience coding and error concealment/correction. The error resilience methods under consideration include random intra macroblock updating and weighted error resilience. For error concealment/correction, we consider (i) the frame copy (FC), (ii) spatio-temporal boundary matching error concealments (STBMA), and (iii) MLD error correction. Our experimental results show that the best performance is achieved when the MLD interacts with weighted error resilience. Together, they yield, on average, about a 2 dB gain over using FC error concealment with weighted error resilience and a 1 dB gain over STBMA with identical error resilience. Furthermore, MLD with error resilience can be more than 10 dB better than FC without error resilience in certain cases.

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“…However, this paper proposes the insertion of a cyclic intra-coded line of macroblocks (MBs) on a per-video frame basis as a better way to mitigate error propagation if less-active video sequences are transmitted over wireless or other 'lossy' links. Earlier work with legacy codecs such as H.263 [1] also considered intra-refresh issues. For more-active sequences (ones with substantial inter-frame motion), periodic insertion of I-frames is still preferable.…”

Section: Introductionmentioning

confidence: 99%

Content-aware intra-refresh for video streaming over lossy links

Ali

Fleury

Ghanbari

2012

2012 IEEE International Conference on Consumer Electronics (ICCE)

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Abstract-Insertion of intra-coded macroblocks (MBs) is a means of mitigating temporal error propagation in mobile video streaming using an H.264/AVC codec. This paper proposes that the insertion of a cyclic line of such intra-coded MBs can give considerable quality gain for less-active video sequences rather than the more common periodic insertion of intra-coded frames, which in its turn is shown to be favorable for more-active sequences. The paper finds that randomized insertion of intra-refresh MBs is always less suitable than a cyclic line of intra-coded MBs. The results are relevant to choice of content when streaming to/between smartphones.

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Adaptive intra block update for robust transmission of H.263

Cited by 53 publications

References 6 publications

Application layer QoS optimization for multimedia transmission over cognitive radio networks

Application layer QoS optimization for multimedia transmission over cognitive radio networks

Performance evaluation of maximum likelihood decoding combined with error resilient video coding

Content-aware intra-refresh for video streaming over lossy links

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