&lt;title&gt;Polyphase down-sampling multiple-description coding for IP transmission&lt;/title&gt;

Caramma, M.; Fumagalli, M.; Lancini, R.

doi:10.1117/12.411832

Cited by 21 publications

(7 citation statements)

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“…Moreover, for our test examples we used a simple linear interpolating filter to reconstruct the images, but we think the image results can be improved using more sophisticated reconstruction filters. We tested our proposed PDMD algorithm on different images and its performance has always overcomed those proposed by literature (see also [12] for comparison results), in particular in error-prone environment. These encouraging results led us to implement it in the proposed video system.…”

Section: A Polyphase Downsampling Multiple Description Algorithm (Pdmd)mentioning

confidence: 74%

“…Other authors proposed different methods to realize a MD system [19]. In the next sub-section we present our proposed algorithm of multiple description coding named Polyphase Downsampling Multiple Description (PDMD) [12]. We are interested in extreme situations, when the network is forced to drop most of the packets: in this way we are able to guarantee narrow band situation cases.…”

Section: Multiple Description Codingmentioning

confidence: 97%

“…On the other hand, when only some of the streams are received, the quality of the reconstruction degrades gracefully, which is very unlikely to happen with a system designed purely for compression. We approach the problem through the generalized multiple description framework and in particular through the method we suggest, that is the Polyphase DownSampling Multiple Description (PDMD) [12]. Our goal in this paper is to explore the performance of the proposed video system in error-prone environment, giving particular attention to features like scalability and robustness.…”

Section: Introductionmentioning

confidence: 98%

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Multiple description coding approach for Internet video delivery

2002

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This work proposes and implements a system to transmit in real-time slow video signals -in particular video conference signal, that is 'head and shoulder' sequences -over the public network. The proposed codec is based on a multiple description approach that gives N equally important and independent flows. The advantage of this codec is an intrinsic robustness to the transmission errors and to the packet loss, as the simulation results have proved. This feature results very suitable not only for IP-network, but also for every packet network like the next generation mobile systems. The approach is important also for the end user scalability since each device can decide the information to receive according to the resolution of the display and the bandwidth of the connecting link using the same source data stream.

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Section: A Polyphase Downsampling Multiple Description Algorithm (Pdmd)mentioning

confidence: 74%

Section: Multiple Description Codingmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

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Multiple description coding approach for Internet video delivery

2002

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“…These methods are conceived as stand alone codecs, incompatible with the standards such as JP2000, H.26X, or those of the MPEG class. Caramma, et al [6] proposed the polyphase downsampling multiple description coding, which is compatible with the standards. However, the drawbacks of the Polyphase Downsampling Multiple Description (PDMD) technique are the loss of coding efficiency due to the separate coding of each description and the certain stiffness in redundancy control among the descriptions.…”

Section: Multiple Description Coding (Mdc)mentioning

confidence: 97%

Low-complexity redundancy insertion in multiple description coding

Yang

Hua-feng

2008

J. Electron.(China)

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Multiple description coding has recently been proposed as a joint source and channel coding to solve the problem of robust image transmission over unreliable network, and it can offer a variety of tradeoff between signal redundancy and transmission robustness. In this letter, a novel pre-and post-processing method with flexible redundancy insertion for polyphase downsampling multiple description coding is presented. The proposed method can be implemented as pre-and post-processing to all standards for image and video communications, with obvious advantages. Simulation results show that this approach can reduce the computational complexity while provide a flexible redundancy insertion to make the system robust for any packet loss situation over different networks.

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“…Another simple MDC method is presented in [35]. It is based on the spatial subsampling of the original video sequence along rows and columns of each frame by means of a polyphase spatial sub sampler (PSS-MDC).…”

Section: Introductionmentioning

confidence: 99%