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A direct non-buffer rate control algorithm for real time video compression

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Abstract

Rate control (RC) is crucial in controlling compression bitrates and encoding qualities for networked video applications. In this paper, we propose a direct non-buffer real-time rate control algorithm for video encoding, which has two unique features. First, unlike traditional algorithms which adopt buffers in rate control, the proposed algorithm does not use a buffer in rate regulation which can reduce the delay and improve real-time response. Second, we propose a new Proportional-Integral-Derivative (PID) bit controller to directly control encoding bitrates. In addition, we also develop a simple but effective method for real-time target bit allocation. To the best of our knowledge, this is the first work that conducts video rate control without using a buffer. Our extensive experimental results have demonstrated that the proposed algorithm outperforms the MPEG-4 rate control algorithm by achieving more accurate rate regulation and improving overall coding quality.

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Acknowledgement

This work is partially supported by NASA EPSCoR 2012 Award (No. NNX13AD32A) and faculty sabbatical leave fund from Uni. of Central Arkansas.

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Authors and Affiliations

  1. Department of Computer Science, University of Central Arkansas, Conway, AR, USA

    Yu Sun & Reshma R. Ginnavaram

  2. IT Research Group, University of Arkansas for Medical School, Little Rock, AR, USA

    Zhidan Feng

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  1. Yu Sun
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  2. Zhidan Feng
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  3. Reshma R. Ginnavaram
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Correspondence to Yu Sun.

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Sun, Y., Feng, Z. & Ginnavaram, R.R. A direct non-buffer rate control algorithm for real time video compression. Multimed Tools Appl 74, 6623–6639 (2015). https://doi.org/10.1007/s11042-014-1913-6

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  • DOI: https://doi.org/10.1007/s11042-014-1913-6

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