Hurst parameter estimation method of variable bit rate video traffic using Fourier filtering

摘要

The present invention relates to a method for estimating a Hurst parameter for bandwidth allocation of a video signal compressed at a variable bit rate per unit time by an encoder, the method comprising: Into a signal at the first stage; Calculating a power spectral density indicative of a distribution of power of a signal in the transformed frequency plane,, In the e equation$S\; (f,\; T)$Power spectral density,$T$Represents a time interval during which the video signal is input,$F\; (f,\; T)$Represents a video signal in the frequency plane; Obtaining a power distribution slope of the calculated power spectral density using a line fitting algorithm,, Where Represents the power distribution slope of the power spectral density; A predetermined relationship between the power distribution slope and the Hurst parameter,$=\; 2H\; +1$The Hurst parameter ($H$); And classifying the compressed video signal into activities according to the Hurst parameter of the estimated value and allocating a band. Therefore, the Hurst parameter can be estimated with a simpler calculation than the R / S method of the related art.