A two-pass video encoder by fixed lagrange multipliers

Cheng Hong Jiang, Chih-Hung Kuo

研究成果: Conference contribution

3 引文 斯高帕斯(Scopus)

摘要

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.

原文English
主出版物標題Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
頁面552-555
頁數4
DOIs
出版狀態Published - 2010 12月 1
事件2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 - Kuala Lumpur, Malaysia
持續時間: 2010 12月 62010 12月 9

出版系列

名字IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS

Other

Other2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
國家/地區Malaysia
城市Kuala Lumpur
期間10-12-0610-12-09

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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