Generating Antipersistent VBR Video Traffic

A novel model for antipersistent variable bit rate (VBR) video traffic is proposed. Antipersistent VBR video bit streams are a subset of VBR video bit streams in which the bit rate is controlled by a rate controller when the video is encoded. Statistical properties of antipersistent VBR video bit streams are very different from those of uncontrolled VBR video bit streams that are encoded with a constant quantization parameter. Discriminating controlled and uncontrolled VBR, an accurate model is proposed for controlled VBR video traffic. The proposed model is built based on the interaction of video encoder and video bit stream that is controlled by the rate controller. The model parameters depend on the encoding and rate control parameters and also depend on the properties of video content. The proposed model not only captures the long−range dependent (LRD) and short−range dependent (SRD) properties of video traffic, but also it can include some properties related to the content and the encoding parameters into the synthetic generated video traffic. This is valuable when generated traffics are used for simulations in which the network behavior is studied based on the content properties and encoding parameters. The proposed model has been validated successfully by several measures.