| 主权项 |
1. A system for recommending works of authorship by recognizing similarities therebetween, comprising providing to a computer system a first signal f1(t) that is a time varying amplitude representation of a first work of authorship and a second signal f2(t) that is a time varying amplitude representation of a second work of authorship, the computer system being programmed to perform a method comprising the steps of:
performing respective frequency transformations of the signals f1(t) and f2(t), thereby obtaining respective first and second frequency varying functions F1(ω) and F2(ω); deriving first and second magnitude functions M1(ω) and M2(ω) from, respectively, the functions F1(ω) and F2(ω), the magnitude functions being based on the magnitudes of the functions F1(ω) and F2(ω); fitting to the magnitude functions respective first and second calming functions C1(ω) and C2(ω), each calming function imposing on its respective magnitude function a limited number “n” of inflection points by use of a sum of terms defining respective coefficients multiplying distinct powers of the variable (ω) that are the same in both the first and second calming functions; computing modified first and second calming functions MC1(ω) and MC2(ω) from the respective calming functions C1(ω) and C2(ω) so as to more nearly equalize the orders of magnitude of the coefficients of the terms of the first and second calming functions that multiply the non-zero powers of (ω); comparing the modified calming functions MC1(ω) and MC2(ω) including computing one or more measures of difference therebetween; and wherein, if said one or more measures of difference is within acceptable limits but not if otherwise, producing an output predetermined to indicate that a person who enjoys the first work is likely to enjoy the second work, thereby providing at least a partial basis for making a recommendation. |
