Distributed coding of endoscopic video

Deligiannis, Nikos; Verbist, Frederik; Barbarien, Joeri; Slowack, Jürgen; Walle, Rik Van de; Schelkens, Peter; Munteanu, Adrian

doi:10.1109/icip.2011.6115816

Cited by 18 publications

(18 citation statements)

References 15 publications

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“…As we can see, even for non-specialized infrastructures the threshold of 67 ms is often respected, even providing a margin to support multiple requests in many cases. This creates confidence that the proposed techniques can be applied in the typically more specialized DVC application scenarios [27], [28] where latencies are expected to be lower.…”

Section: A Requirements For Real-time Outputmentioning

confidence: 94%

Distributed Video Coding With Feedback Channel Constraints

Slowack

Škorupa

Deligiannis

et al. 2012

IEEE Trans. Circuits Syst. Video Technol.

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Abstract-Many of the Distributed Video Coding (DVC) systems described in the literature make use of a feedback channel from the decoder to the encoder to determine the rate. However, the number of requests through the feedback channel is often high, and as a result the overall delay of the system could be unacceptable in practical applications. As a solution, feedbackfree DVC systems have been proposed, but the problem with these solutions is that they incorporate a difficult trade-off between encoder complexity and compression performance.Recognizing that a limited form of feedback may be supported in many video streaming scenarios, in this paper we propose a method for constraining the number of feedback requests to a fixed maximum number of N requests for an entire WynerZiv (WZ) frame. The proposed technique estimates the WZ rate at the decoder using information obtained from previously decoded WZ frames, and defines the N requests by minimizing the expected rate overhead. Tests on eight sequences show that the rate penalty is less than 5% when only 5 requests are allowed per WZ frame (for a GOP of size four). Furthermore, due to improvements from previous work, the system is able to perform better than or similar to DISCOVER even when up to 2 requests per WZ frame are allowed.The practical usefulness of the proposed approach is studied by estimating end-to-end delay and encoder buffer requirements, indicating that DVC with constrained feedback can be an important solution in the context of video streaming scenarios.

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Section: A Requirements For Real-time Outputmentioning

confidence: 94%

Distributed Video Coding With Feedback Channel Constraints

Slowack

Škorupa

Deligiannis

et al. 2012

IEEE Trans. Circuits Syst. Video Technol.

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“…Contemporary capsule integrated video circuits occupy conventional intra-frame coding schemes, e.g., Motion JPEG. The IBBT's DVC group is the first to design a novel video coding architecture for wireless endoscopy based on the DVC principles [5].…”

Section: Wireless Capsule Endoscopymentioning

confidence: 99%

Demo: Distributed video coding applications in wireless multimedia sensor networks

Jacobs

Deligiannis

Verbist

et al. 2011

2011 Fifth ACM/IEEE International Conference on Distributed Smart Cameras

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Abstract-Novel distributed video coding (DVC) architectures developed by the IBBT DVC group realize state-of-the-art video coding efficiency under stringent energy restrictions, while supporting error-resilience and scalability. Therefore, these architectures are particularly attractive for application scenarios involving low-complexity energy-constrained wireless visual sensors. This demo presents the scenarios, which are considered to be the most promising areas of integration for IBBT's DVC systems, considering feasibility and commercial applicability.

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“…The interest in distributed coding has been revitalized when the first practical implementations of DVC appeared in 2002 [5], [6]. They decrease the computational burden of the encoder, and also allow to encode multiple sources without need of communication among them, which may be essential in some applications such as wireless sensor networks [7], multicamera systems, multiterminal networks [8], [9] and medical imaging [10]. Moreover, DVC techniques have recently found a new exciting application in the context of interactive multiview video streaming [11], [12] since they allow to encode a new image without knowing which images are available to the decoder (this happens when the user is allowed to interactively change the displayed view).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Side Information Effectiveness in Distributed Video Coding

Maugey

Gauthier

Cagnazzo

et al. 2013

IEEE Trans. Circuits Syst. Video Technol.

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The rate-distortion performance of a distributed video coding system strongly depends on the characteristics of the side information. One could naïvely think that the best side information is the one with the largest PSNR with respect to the original corresponding image. However, previous works have shown that this is not always the case and a reduction of the side information MSE does not always translate into better ratedistortion performance for the complete system. The scope of this paper is to explore a set of metrics other than the PSNR and explicitly designed to classify the side information with respect to its impact on the end-to-end compression performance. A first contribution is to define an experimental framework that can be used to meaningfully compare different metrics for side information evaluation. As a second contribution, our analysis allows to understand why in some cases PSNR-based metrics provide a fairly reliable estimation of the side information quality, while in other cases they do not. This analysis also allows us to introduce a set of new metrics that are better adapted for side information effectiveness evaluation, and that are based on a suitable power of the absolute difference between side information and the original image, or on the Hamming distance between the respective transform coefficients. Besides their theoretical interest, these new metrics can also improve the rate-distortion performance of some distributed video coding systems such as the hash-based ones. We observe improvement up to 74 % rate reduction in a simple study case.

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Distributed coding of endoscopic video

Cited by 18 publications

References 15 publications

Distributed Video Coding With Feedback Channel Constraints

Distributed Video Coding With Feedback Channel Constraints

Demo: Distributed video coding applications in wireless multimedia sensor networks

Evaluation of Side Information Effectiveness in Distributed Video Coding

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