Error resilient video multicast using Randomized Distributed Space Time Codes

The exact expressions for symbol error probability and outage probability of randomized distributed space-time codes (RDSTC) under Rayleigh fading are derived. The diversity gain derived in the literature uses the Chernoff bound which may not be achievable in general. Utilizing the exact expression, the achievable diversity gain of RDSTCs is validated. The analytical expressions are verified by Monte-Carlo simulations.

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“…case since the asymptotic behavior does not depend on the channel mean powers. From the MGF of given in (13) …”

Section: E Asymptotic Analysismentioning

confidence: 99%

“…More recently, this type of RDSTC has been intensively applied for video multicast [12], [13] due to its low encoding and decoding complexity and high performance. Motivated by all of the above, in this paper, we analyze the end-to-end (e2e) performance of RDSTC with complex Gaussian distribution for ℛ ℛ ℛ.…”

Section: Introductionmentioning

confidence: 99%

End-to-end performance of randomized distributed space-time codes

Duong

Alay

Erkip

et al. 2010

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

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“…The transmission rates of both hops are chosen to maximize the supportable video rates while ensuring that all nodes receive the video with a negligible packet loss rate after two-hop transmission. To increase the supportable video rates, the packet-level FEC is considered in [7], and two-hop transmission rates and the FEC rate is chosen to maximize the supportable video rates. Throughout this paper, this scheme will be referred as multicast-RDSTC.…”

Section: Introductionmentioning

confidence: 99%

Enhanced parity packet transmission for Video multicast using R-DSTC

Alay

Guo

Wang

et al. 2010

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

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In this paper, a cooperative multicast scheme that uses Randomized Distributed Space Time Codes (R-DSTC), along with packet level Forward Error Correction (FEC), is studied. For the source packets, two-hop transmission is considered, where a packet is transmitted first by the access point (AP), and then forwarded using R-DSTC by the nodes that receive the packet. On the other hand, parity packets are generated by the nodes that receive all the source packets correctly and are transmitted using R-DSTC. The optimum transmission rates for source and parity packets, as well as the number of parity packets required, are determined such that the video quality at all nodes is maximized. It is shown that this scheme can support a higher video rate than a previously developed R-DSTC based scheme where both source and parity packets go through a two-hop transmission, as well as non-cooperative direct transmission.

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“…For source coding, we use the DSC codec in [10]a H.263-based codec 4 with modifications to encode bitplanes of DCT coefficients given side information using low-density parity check (LDPC) codes-to encode a 100-frame MPEG multiview video test sequence akko at 320 × 240 resolution. We set captured views to be M = 5 and DSC insertion period to be t = 10 frames.…”

Section: Experimentationmentioning

confidence: 99%

“…One recent approach to alleviate the wireless packet loss problem is cooperative communication [3], [4]. In short, given the broadcast nature of wireless transmission (each transmission is heard by multiple receivers) and the "uncorrelatedness" of receivers' channels (hence unlikely for all receivers to undergo bad channel fades at the same time), peers that currently experience good channels (rich peers) can relay overheard information to clients who currently experience channel losses (poor peers), without relying on server retransmission.…”

Section: Introductionmentioning

confidence: 99%

Distributed Source Coding for WWAN Multiview Video Multicast with Cooperative Peer-to-Peer Repair

Liu¹,

Cheung²,

Ji³

2011

2011 IEEE International Conference on Communications (ICC)

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Abstract-Video multicast over Wireless Wide Area Networks(WWAN) is difficult because of unavoidable packet losses and impracticality of retransmission on a per packet, per client basis, due to the known NAK implosion problem. Recent approach exploits clients' cooperation for packet recovery, so that a peer group's received WWAN packets are shared using a secondary network like Wireless Local Area Network (WLAN). For multiview video multicast, where a client can switch views interactively by subscribing to different WWAN multicast channels streaming different views, two new difficulties arise. First, system must provide timely view-switching mechanism, so that client can switch to a desired view quickly for correct decoding and display. Second, it is difficult for system to leverage neighboring peers for cooperative loss recovery, since neighbors are more likely to be subscribing to different views from a loss-stricken peer.In this paper, we use Distributed Source Coding (DSC), a new compression tool in video coding, to solve both problems. Each DSC frame is encoded with a set of predictor frames, and correct decoding only requires one of the predictors in the set to be available at decoder. Periodic insertion of DSC frames into video streams then enables a peer to switch from view v to v at the DSC frame boundary, assuming DSC frame of view v was encoded using a frame in view v as a predictor. For the same assumption, a neighbor watching view v can help a peer watching view v evade error propagation resulting from earlier losses and resume decoding at the DSC boundary. Experiments show that optimized usage of DSC frames in a coding structure, where unequal error protection is enabled to decrease the probability of decoding failure earlier in a group of pictures, outperforms a structure using I-frames instead for view switching by up to 11dB in video quality in typical WWAN network loss environment.

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Error resilient video multicast using Randomized Distributed Space Time Codes

Cited by 9 publications

References 15 publications

End-to-end performance of randomized distributed space-time codes

End-to-end performance of randomized distributed space-time codes

Enhanced parity packet transmission for Video multicast using R-DSTC

Distributed Source Coding for WWAN Multiview Video Multicast with Cooperative Peer-to-Peer Repair

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