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
Event2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 - Kuala Lumpur, Malaysia
Duration: 2010 Dec 62010 Dec 9

Other

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

Fingerprint

Lagrange multipliers
Cost functions

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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] https://doi.org/10.1109/APCCAS.2010.5774748
Jiang, Cheng Hong ; Kuo, Chih-Hung. / A two-pass video encoder by fixed lagrange multipliers. Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010. 2010. pp. 552-555
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Jiang, CH & 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., 5774748, pp. 552-555, 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010, Kuala Lumpur, Malaysia, 10-12-06. https://doi.org/10.1109/APCCAS.2010.5774748

A two-pass video encoder by fixed lagrange multipliers. / Jiang, Cheng Hong; Kuo, Chih-Hung.

Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010. 2010. p. 552-555 5774748.

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

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Jiang CH, Kuo C-H. A two-pass video encoder by fixed lagrange multipliers. In Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010. 2010. p. 552-555. 5774748 https://doi.org/10.1109/APCCAS.2010.5774748