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Multiplexing Gain of Capped VBR Video

Zlatka Avramova, Danny De Vleeschauwer, Sabine Wittevrongel, Herwig Bruneel

Open publisher page 6 citations

Abstract

CBR (Constant Bit Rate) video fluctuates in quality, while its multiplexing behaviour is easy to predict: the links can be loaded to almost 100%. VBR (Variable Bit Rate) video aims at constant quality, but as the bit rate fluctuates over time the links cannot be fully loaded. Because in unconstrained VBR video the bit rate fluctuation might be too large, capped VBR video is proposed as an alternative. Similarly as for unconstrained VBR video, capped VBR video aims at a constant quality, but when in certain intervals this requires a too high bit rate, the bit rate is limited (i.e., capped) in order to support more video flows on the links, at the expense of a quality reduction.

About this research paper

What this paper is about

CBR (Constant Bit Rate) video fluctuates in quality, while its multiplexing behaviour is easy to predict: the links can be loaded to almost 100%. VBR (Variable Bit Rate) video aims at constant quality, but as the bit rate fluctuates over time the links cannot be fully loaded. Because in unconstrained VBR video the bit rate fluctuation might be too large, capped VBR video is proposed as an alternative. Similarly as for unconstrained VBR video, capped VBR video aims at a constant quality, but when in certain intervals this requires a too high bit rate, the bit rate is limited (i.e., capped) in order to support more video flows on the links, at the expense of a quality reduction.

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OpenAlex reports 6 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

CBR (Constant Bit Rate) video fluctuates in quality, while its multiplexing behaviour is easy to predict: the links can be loaded to almost 100%. VBR (Variable Bit Rate) video aims at constant quality, but as the bit rate fluctuates over time the links cannot be fully loaded. Because in unconstrained VBR video the bit rate fluctuation might be too large, capped VBR video is proposed as an alternative. Similarly as for unconstrained VBR video, capped VBR video aims at a constant quality, but when in certain intervals this requires a too high bit rate, the bit rate is limited (i.e., capped) in order to support more video flows on the links, at the expense of a quality reduction.

Key concepts: Variable bitrate, Constant bitrate, Computer science, Multiplexing, Real-time computing, Bit rate, Video quality, Telecommunications

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