Deghosting based on in-loop selective filtering using motion vector information for low-bit-rate-video coding

Niranjan Dayanand Narvekar, Wei Jung Chien, Nabil G. Sadaka, Glen P. Abousleman, Lina Karam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, a technique is presented to alleviate ghosting artifacts in the decoded video sequences for low-bit-rate video coding. Ghosting artifacts can be defined as the appearance of ghost like outlines of an object in a decoded video frame. Ghosting artifacts result from the use of a prediction loop in the video codec, which is typically used to increase the coding efficiency of the video sequence. They appear in the presence of significant frame-to-frame motion in the video sequence, and are typically visible for several frames until they eventually die out or an intra-frame refresh occurs. Ghosting artifacts are particularly annoying at low bit rates since the extreme loss of information tends to accentuate their appearance. To mitigate this effect, a procedure with selective in-loop filtering based on motion vector information is proposed. In the proposed scheme, the in-loop filter is applied only to the regions where there is motion. This is done so as not to affect the regions that are devoid of motion, since ghosting artifacts only occur in high-motion regions. It is shown that the proposed selective filtering method dramatically reduces ghosting artifacts in a wide variety of video sequences with pronounced frame-to-frame motion, without degrading the motionless regions.

Original languageEnglish (US)
Title of host publicationMobile Multimedia/Image Processing, Security, and Applications 2009
DOIs
StatePublished - Sep 7 2009
EventMobile Multimedia/Image Processing, Security, and Applications 2009 - Orlando, FL, United States
Duration: Apr 14 2009Apr 15 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7351
ISSN (Print)0277-786X

Other

OtherMobile Multimedia/Image Processing, Security, and Applications 2009
CountryUnited States
CityOrlando, FL
Period4/14/094/15/09

Keywords

  • Deghosting
  • Ghosting artifact
  • In-loop filter
  • Motion vector information
  • Wavelet-based coding

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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