Global brightness-variation compensation for video coding

Kazuto Kamikura, Hiroshi Watanabe, Hirohisa Jozawa, Hiroshi Kotera, Susumu Ichinose

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

In this paper, a global brightness-variation compensation (GBC) scheme is proposed to improve the coding efficiency for video scenes that contain global brightness variations caused by fade in/out, camera-iris adjustment, flicker, illumination change, and so on. In this scheme, a set of two brightness-variation parameters, which represent multiplier and offset components of the brightness variation in the whole frame, is estimated. The brightness variation is then compensated using the parameters. We also propose a method to apply the GBC scheme to component signals for video coding. Furthermore, a block-by-block ON/OFF control method for GBC is introduced to improve coding performance even for scenes including local variations in brightness caused by camera flashes, spotlights, and the like. Simulation results show that the proposed GBC scheme with the ON/OFF control method improves the peak signal-to-noise ratio (PSNR) by 2-4 dB when the coded scenes contain brightness variations.

Original languageEnglish
Pages (from-to)988-1000
Number of pages13
JournalIEEE Transactions on Circuits and Systems for Video Technology
Volume8
Issue number8
DOIs
Publication statusPublished - 1998 Dec 1

Keywords

  • Brightness-variation compensation
  • Motion estimation
  • Video coding

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering

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