IEEE Trans Image Process - Re-estimation of motion and reconstruction for distributed video coding.

Tópicos

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{ motion(1329) object(1292) video(1091) }
{ method(2212) result(1239) propos(1039) }
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{ drug(1928) target(777) effect(648) }
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{ patient(2837) hospit(1953) medic(668) }
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{ survey(1388) particip(1329) question(1065) }
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{ activ(1452) weight(1219) physic(1104) }
{ detect(2391) sensit(1101) algorithm(908) }

Resumo

Transform domain Wyner-Ziv (TDWZ) video coding is an efficient approach to distributed video coding (DVC), which provides low complexity encoding by exploiting the source statistics at the decoder side. The DVC coding efficiency depends mainly on side information and noise modeling. This paper proposes a motion re-estimation technique based on optical flow to improve side information and noise residual frames by taking partially decoded information into account. To improve noise modeling, a noise residual motion re-estimation technique is proposed. Residual motion compensation with motion updating is used to estimate a current residue based on previously decoded frames and correlation between estimated side information frames. In addition, a generalized reconstruction algorithm to optimize a multihypothesis reconstruction is proposed. The proposed techniques using motion and reconstruction re-estimation (MORE) are integrated in the SING TDWZ codec, which uses side information and noise learning. For Wyner-Ziv frames using GOP size 2, the MORE codec significantly improves the TDWZ coding efficiency with an average (Bj?ntegaard) PSNR improvement of 2.5 dB and up to 6 dB improvement compared with DISCOVER.

Resumo Limpo

transform domain wynerziv tdwz video code effici approach distribut video code dvc provid low complex encod exploit sourc statist decod side dvc code effici depend main side inform nois model paper propos motion reestim techniqu base optic flow improv side inform nois residu frame take partial decod inform account improv nois model nois residu motion reestim techniqu propos residu motion compens motion updat use estim current residu base previous decod frame correl estim side inform frame addit general reconstruct algorithm optim multihypothesi reconstruct propos propos techniqu use motion reconstruct reestim integr sing tdwz codec use side inform nois learn wynerziv frame use gop size codec signific improv tdwz code effici averag bjntegaard psnr improv db db improv compar discov

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