Rate-smoothed encoding for real-time video streaming applications

Jianhua Wu, Jianfei Cai

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review


For real-time video streaming applications over the constant bit rate channels, it is highly desired that video signals can be encoded in not only good average quality but also smooth video quality. However, in the case that the network resource is sufficiently large and the video quality has reached the target quality, the quality smoothing is not necessary and the rate smoothing is desired to avoid overusing the unnecessary network resource but also achieve a smoothed traffic rate. In this paper, we propose a novel real-time rate-smoothed encoding scheme by applying the low pass filtering idea. Both theoretical analysis and experimental results show that the proposed rate-smoothed encoding scheme can achieve a target average quality while significantly reducing the peak rate and the rate variance. We have further proposed a joint quality and rate smoothed encoding scheme, which can provide adaptive smoothing according to different situations. Experimental results show that the proposed joint smoothing scheme can make an optimal balance between the quality fluctuation and the rate fluctuation, and hence improve the overall system performance.

Original languageEnglish
Title of host publicationProceedings of SPIE-IS and T Electronic Imaging - Visual Communications and Image Processing 2007
EditionPART 1
ISBN (Print)0819466212, 9780819466211
Publication statusPublished - 2007
Externally publishedYes
EventVisual Communications and Image Processing 2007 - San Jose, United States of America
Duration: 28 Jan 20071 Feb 2007
https://www.spiedigitallibrary.org/conference-proceedings-of-SPIE/6508.toc (Proceedings)

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
NumberPART 1
ISSN (Print)0277-786X


ConferenceVisual Communications and Image Processing 2007
Abbreviated titleVCIP 2007
Country/TerritoryUnited States of America
CitySan Jose
Internet address


  • Quality smoothing
  • Rate smoothing
  • Real-time
  • Video streaming

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