A two-pass video encoder by fixed lagrange multipliers

Cheng Hong Jiang, Chih-Hung Kuo

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

3 Citations (Scopus)

Abstract

For better video qualities, the video encoders usually adopt the process of Rate Distortion Optimization (RDO) that involves the the cost function with the Lagrange multiplier to weight the ratio between rates and distortions. However, the quantization parameter (QP) is decided before the encoding process, which is often not the best one. In this work, we propose a two-pass rate control (RC) mechanism based on the fixed Lagrange multiplier λ. An accurate λ value is estimated after the first pass coding, so that it can be adopted as a fixed parameter in the second pass. Simulation results show that, compared to the RC method implemented in H.264 reference software, the proposed method could significantly improve the visual quality.

Original languageEnglish
Title of host publicationProceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
Pages552-555
Number of pages4
DOIs
Publication statusPublished - 2010 Dec 1
Event2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 - Kuala Lumpur, Malaysia
Duration: 2010 Dec 62010 Dec 9

Publication series

NameIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS

Other

Other2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
CountryMalaysia
CityKuala Lumpur
Period10-12-0610-12-09

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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  • Cite this

    Jiang, C. H., & Kuo, C-H. (2010). A two-pass video encoder by fixed lagrange multipliers. In Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 (pp. 552-555). [5774748] (IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS). https://doi.org/10.1109/APCCAS.2010.5774748