Reduction of temporal distortion in video coding based on detection of just-noticeable temporal pumping artifact

Yanchao Gong, Shuai Wan, Kaifang Yang, Hong Ren Wu, Fuzheng Yang, Bo Li

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

At low bit-rates, video coding under the hierarchical prediction structure induces a temporal distortion known as temporal pumping artifact (TPA) when the quantization parameter cascading strategy is used. TPA manifests itself as a pumping effect visually, due to severe quality fluctuations among adjacent pictures, which seriously affects the perceptual quality of a video. In this work, the causes and perception of the TPA is first analyzed. Then a metric of just-noticeable temporal pumping artifact (JNTPA) is formulated based on characteristics of the human visual system. Based on JNTPA, an efficient algorithm has been devised for TPA reduction (denoted as TRA-JNTPA for short). The experimental results have demonstrated that the proposed JNTPA measure is in line with human perception, and compared with JVT-P014, the proposed TRA-JNTPA achieves significant reduction of the TPA with superior subjective video quality at a given bit-rate.

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalSignal Processing: Image Communication
Volume42
DOIs
StatePublished - 1 Mar 2016

Keywords

  • Hierarchical prediction structure
  • Human visual system
  • Just noticeable temporal pumping artifact
  • Quantization parameter cascading
  • Video coding

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