DEVICE AND METHOD FOR ADVANCED BAYESIAN KALMAN TIME ESTIMATION

摘要

A method and device are disclosed for calculating estimated time stamps ìt in video distribution apparatus, MPEG-2 program encoders, multiplexers, splicers. True times Yt of a data packet number t having the linear form: Yt = Yt-1 + Jt, Jt = Jt-1 + <t>t, with <t>t being a small perturbation relative to the linear relation between time and packet number. The true times of data packet number t are observed as: ot = Yt + <h>t, where <h>t is an observational error. The estimated time stamps are produced according to: ìt = ìt-1 + beta t and such that the value of beta t is made dependent on the exceeding by #ot - ìt-1 - beta t-1 # of max[<h>t]. The results are accurate and smooth estimated time stamps.