A new DCT-Domain distortion model for MB-Level quality control

He Xun, Chen Xianmin, Liu Peilin, Satoshi Goto

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

Abstract

For many applications like video surveillance and digital cinema, it is desirable to encode video content with constant video quality. However, although constant quantization parameter is used in video encoder, quality fluctuation in macroblock level is still very large and standard deviation of PSNR is typically about 1.8dB. Since distortion is introduced in the process of quantization of DCT coefficients, we propose a new DCT-domain distortion model which utilizes the truncated tailing bits in quantization to estimate distortion in macroblock level, and QP of each block is determined by the estimated PSNR. Experimental results show that our proposed model can accurately estimate distortion of each MB before implementing quantization and the corresponding RMSE is only about 0.3dB (less than 1% of the actual value). Compared with previous works, our proposed algorithm can achieve 0.57dB enhancement in quality stabilization.

Original languageEnglish
Title of host publicationProceedings - 2009 International Conference on Computer Modeling and Simulation, ICCMS 2009
Pages69-72
Number of pages4
DOIs
Publication statusPublished - 2009
Event2009 International Conference on Computer Modeling and Simulation, ICCMS 2009 - Macau
Duration: 2009 Feb 202009 Feb 22

Other

Other2009 International Conference on Computer Modeling and Simulation, ICCMS 2009
CityMacau
Period09/2/2009/2/22

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Keywords

  • DCT
  • Distortion Model
  • Quality Control

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Science Applications
  • Software

Cite this

Xun, H., Xianmin, C., Peilin, L., & Goto, S. (2009). A new DCT-Domain distortion model for MB-Level quality control. In Proceedings - 2009 International Conference on Computer Modeling and Simulation, ICCMS 2009 (pp. 69-72). [4797357] https://doi.org/10.1109/ICCMS.2009.28