Title :
A method of tap clustering in an adaptive filter for video ghost cancellation
Author_Institution :
North American Philips Corp., Briarcliff Manor, NY, USA
Abstract :
A video echo cancellation scheme that uses system identification techniques where the associated transversal filter has fewer multipliers than taps is presented. This topology is made possible by exploiting the properties of the echo channel impulse response. Optima are obtained by performing multiple system identifications with the available multipliers in various configurations along the transversal delay line. Then linear mapping is applied to reconstruct the real optimum of the filter, and the multipliers are redistributed where needed. The mapping reduces the redistribution problem to a simple geometric interpretation and permits a nonwhite reference to be used in system identification
Keywords :
adaptive filters; delay lines; digital filters; echo suppression; filtering and prediction theory; identification; video equipment; video signals; adaptive filter; delay line; echo channel impulse response; linear mapping; nonwhite reference; system identification techniques; tap clustering; transversal filter; video ghost cancellation; Adaptive filters; Delay lines; Echo cancellers; Finite impulse response filter; Image reconstruction; Laboratories; Least squares approximation; System identification; Topology; Transversal filters;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112685
