High order motion interpolation for side information improvement in DVC

Petrazzuoli, Giovanni; Cagnazzo, Marco; Pesquet‐Popescu, Béatrice

doi:10.1109/icassp.2010.5496075

Cited by 30 publications

(32 citation statements)

References 7 publications

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“…VII for GOP size equal to 8. As shown in [8], the improvement of SI in HOMI also improves the RD performance compared to DISCOVER. The method proposed here outperforms the performance of HOMI also in terms of rate distortion performance with respect to DISCOVER.…”

Section: B Rd Performancementioning

confidence: 78%

“…1 is found by maximizing the average PSNR between the WZF estimation and the true one. The optimal value of are already shown in [8], with the exception of cases where the frame to interpolate are not equally spaced (see Tab. III).…”

Section: A Side Information Constructionmentioning

confidence: 90%

“…We propose to refine the SI on the central WZFs by using the lateral already decoded WZFs in order to interpolate frames closer than the KFs used initially for the estimation of the central WZF. The method used here for the motion interpolation is HOMI illustrated in [8]. We have also extended this method for GOP size equal to 8.…”

Section: Discussionmentioning

confidence: 99%

“…• The estimation of the WZF is the average of compensated by the forward MVF and compensated by the backward MVF We have proposed an improvement of this algorithm in [8]. A higher order motion interpolation (HOMI) is performed by using the closest four frames to for estimating it.…”

Section: Reference Methodsmentioning

confidence: 99%

“…The proposed algorithm uses interpolation of higher order (HOMI) [8] and consists in the following steps:…”

Section: Proposed Methodsmentioning

confidence: 99%

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Side information refinement for long duration GOPs in DVC

Petrazzuoli

Maugey

Cagnazzo

et al. 2010

2010 IEEE International Workshop on Multimedia Signal Processing

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Abstract-Side information generation is a critical step in distributed video coding systems. This is performed by using motion compensated temporal interpolation between two or more key frames (KFs). However, when the temporal distance between key frames increases (i.e. when the GOP size becomes large), the linear interpolation becomes less effective. In a previous work we showed that this problem can be mitigated by using high order interpolation. Now, in the case of long duration GOP, state-ofthe-art algorithms propose a hierarchical algorithm for side information generation. By using this procedure, the quality of the central interpolated image in a GOP is consistently worse than images closer to the KFs. In this paper we propose a refinement of the central WZFs by higher order interpolation of the already decoded WZFs, that are closer to the WZF to be estimated. So we reduce the fluctuation of side information quality, with a beneficial impact on final rate-distortion characteristics of the system. The experimental results show an improvement on the SI up to 2.71 dB with respect the state-of-the-art and a global improvement of the PSNR on the decoded frames up to 0.71 dB and a bit rate reduction up to 15 %.

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Section: B Rd Performancementioning

confidence: 78%

Section: A Side Information Constructionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Reference Methodsmentioning

confidence: 99%

“…The proposed algorithm uses interpolation of higher order (HOMI) [8] and consists in the following steps:…”

Section: Proposed Methodsmentioning

confidence: 99%

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Side information refinement for long duration GOPs in DVC

Petrazzuoli

Maugey

Cagnazzo

et al. 2010

2010 IEEE International Workshop on Multimedia Signal Processing

Self Cite

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Semantic multimedia remote display for mobile thin clients

et al. 2013

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Current remote display technologies for mobile thin clients convert practically all types of graphical content into sequences of images rendered by the client. Consequently, important information concerning the content semantics is lost. The present paper goes beyond this bottleneck by developing a semantic multimedia remote display. Index Terms-semantic multimedia remote display, mobile thin client, MPEG-4 multimedia scene (BiFS, LASeR), X Window System, VNC-HEXTILE, RDP.

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