Adaptive windowing technique for variable block-size motion compensation

Seung Wook Park, Seung Hwan Kim, Chang Su Kim, Sang Uk Lee

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We propose an overlapped block motion compensation method, called adaptive windowing technique, to improve the performance of variable block-size motion compensation in H.264. First, we restrict the number of neighboring blocks to be overlapped. Then we design adaptive overlapping windows, where each weight is set to be inversely proportional to the distance between the current pixel and the neighboring block. The weights can be computed efficiently in both the encoder and the decoder. Also, to further improve the prediction performance, we introduce the notion of reliability of a motion vector based on the block size, and fine-tune the weights according to the reliability. Extensive simulation results show that the proposed algorithm improves the performance of H.264 both objectively and subjectively.

Original languageEnglish
Pages (from-to)509-519
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5308
Issue numberPART 1
DOIs
Publication statusPublished - 2004
Externally publishedYes
EventVisual Communications and Image Processing 2004 - San Jose, CA, United States
Duration: 2004 Jan 202004 Jan 22

Keywords

  • H.264
  • Motion compensation
  • Overlapped block motion compensation (OBMC)
  • Variable block-size motion compensation (VBMC)
  • Windowing

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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