期刊
MULTIMEDIA TOOLS AND APPLICATIONS
卷 74, 期 17, 页码 6623-6639出版社
SPRINGER
DOI: 10.1007/s11042-014-1913-6
关键词
Rate control; PID bit controller; Bit allocation; Video compression
类别
资金
- NASA EPSCoR [NNX13AD32A]
- Uni. of Central Arkansas
- NASA [475328, NNX13AD32A] Funding Source: Federal RePORTER
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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