A region-based intra-frame rate control scheme by jointing inter-frame dependency and inter-frame correlation

Hai-Miao HU*, Mingliang ZHOU, Yang LIU, Naiyu YIN

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

6 Citations (Scopus)

Abstract

During I frame switching, the subjective quality between I frame and P frames usually have obvious fluctuation due to different coding methods. The periodic temporal visual fluctuation will cause video flicker. According to extensive experiments, we observe that I frame flicker possess a strong regional characteristics and different region have different degree of flicker. Based on this observation, a region-based I frame rate control scheme is proposed to suppress I frame flicker according to the different characteristics of the moving and non-moving regions. Firstly, by jointly considering the inter-frame dependency between I frame and subsequent un-encoded P frames and the inter-frame correlation between I frame and previous encoded P frame, an optimization model is proposed to achieve the optimal QPs for different regions. Secondly, a region-based inter-frame dependency model is proposed to separately describe the inter-frame dependency of different regions, which can accurately describe their description of the inter-frame dependency. The experimental results demonstrate that the proposed scheme can efficiently suppress I frame flicker and maintain the smoothness of subjective quality. Moreover, the proposed scheme can achieve a PSNR gain by 0.26 dB on average when compared with the rate control scheme adopted by the HEVC reference software HM15.0.

Original languageEnglish
Pages (from-to)12917-12940
Number of pages24
JournalMultimedia Tools and Applications
Volume76
Early online date4 Jul 2016
DOIs
Publication statusPublished - May 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016, Springer Science+Business Media New York.

Keywords

  • HEVC
  • I frame rate control
  • Inter-frame correlation
  • Inter-frame dependency
  • Region-division
  • Video flicker

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