The present invention provides a method for generating a timing offset signal applied to a sampling device for recovering a symbol stream from a broadcast signal by characterizing the dispersion of received signal. A hierarchical filterbank decomposes the input signal into a multi-resolution timefrequency representation from which the encoder can efficiently extract both tonal and residual components. The first agent modifies at least one data object in the desktop environment responsive to the change. Further included is a static structure cantilevered from the side wall below the dynamic structure.