Patent ID: 6993452

Claim:
A method executed in a computer of computing a distance measure between first mixture type probability distribution functions, G ⁡ ( x ) = ∑ i = 1 N ⁢ μ i ⁢ g i ⁡ ( x ) , pertaining to a set data collected from a first source, and a second mixture type probability distribution function H ⁡ ( x ) = ∑ k = 1 K ⁢ γ k ⁢ h k ⁡ ( x ) , pertaining to another set of collected data, the improvement characterized by: said distance measure being D M ⁢ ( G , H ) = min w = [ ω ik ] ⁢ ∑ i = 1 N ⁢ ∑ k = 1 K ⁢ ω ik ⁢ d ⁢ ( g i , h k ) , where d(g i , h k ) is a function of the distance between component g i of the first probability distribution function and component h k of the second probability distribution function where ∑ i = 1 N ⁢ μ i = 1 ⁢ ⁢ and ⁢ ⁢ ∑ k = 1 K ⁢ γ k = 1 , ω ik ≧0 for 1≦i≦N, and for 1 ≦k≦K, and ∑ k = 1 K ⁢ ω ik = μ i , 1 ≤ i ≤ N , ∑ i = 1 N ⁢ ω ik = γ k , 1 ≤ k ≤ K , and making a determination, based on said computed overall distance as to whether said another set of collected data pertains to said source.