Two Pass Rate Control for Consistent Quality Based on Down-Sampling Video in HEVC

Yu Yao Shen, Chih Hung Kuo

研究成果: Conference contribution

5 引文 斯高帕斯(Scopus)

摘要

Rate control plays an important role in video coding and streaming applications with bandwidth constraints. While most researches are proposed to improve the coding efficiency' the fluctuation of video quality is seldom considered. Many rate control schemes suffer from unreliable initialization of coding parameters, which leads to seriously inconsistent quality at the beginning of a video. Besides, the hierarchical structure for frame references introduces more quality fluctuations, although it improves the coding efficiency significantly. This paper presents a two pass rate control method that aims for a consistent visual quality. The video is downsampled by four times, and then encoded for the first pass. A fixed Lagrange multiplier (\lambda) is derived from the information recorded in the first pass, and then applied for all frames in the second coding pass. A QP adjustment policy is adopted to maintain a consistent quality and a constant bitrate. Experimental results show that the proposed rate control method can reduce the fluctuation of video quality to be averagely 94.63% less than that encoded by the HEVC Test Model (HM16.9).

原文English
主出版物標題2018 IEEE International Conference on Multimedia and Expo, ICME 2018
發行者IEEE Computer Society
ISBN(電子)9781538617373
DOIs
出版狀態Published - 2018 10月 8
事件2018 IEEE International Conference on Multimedia and Expo, ICME 2018 - San Diego, United States
持續時間: 2018 7月 232018 7月 27

出版系列

名字Proceedings - IEEE International Conference on Multimedia and Expo
2018-July
ISSN(列印)1945-7871
ISSN(電子)1945-788X

Conference

Conference2018 IEEE International Conference on Multimedia and Expo, ICME 2018
國家/地區United States
城市San Diego
期間18-07-2318-07-27

All Science Journal Classification (ASJC) codes

  • 電腦網路與通信
  • 電腦科學應用

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