Patent HR-P20191903-A2 (HR)
Inventor: DVEČKO MARKO
IPC: H04R3/04
Filed: 2019-10-21
Abstract: Predmetni izum se odnosi na metodu i uređaj za obradu audio signala u audio lancu koje metoda i uređaj korigiraju nelinearnost elektroakustičkih pretvarača u audio lancu uzimajući u obzir i nelinearnu psihoakustičnu karakteristiku ljudskog uha na način da se kontrolirano dodaju nelinearnosti u audio lancu da bi dobili bolju zvučnu sliku i više detalja kod reprodukcije zvuka koristeći aproksimacije kvadratne i polinomne funkcije petog stupnja u nekom rasponu. Prema predmetnom izumu metoda se sastoji od aproksimiranje nelinearnom polinomnom funkcijom-petog stupnja psihoakustične karakteristike ljudskog uha, i dodavanje najmanje jednog nelinearnog elementa (4) ispred najmanje jednog elektroakustičkog pretvarača u audio lancu, koji nelinearni element (4) ima takvu funkciju da dodaje nelinearnost u audio lanac koja ispravlja nelinearnost najmanje jednog elektroakustičkog pretvarača i/ili nelinearnost aproksimirane psihoakustične karakteristike ljudskog uha za promjenu tlaka kod ljudskog uha do p_∆. Uređaj (19) za obradu audio signala, prema predmetnom izumu, sadrži najmanje jedan nelinearni element (4) u audio lancu koji ima takvu funkciju da dodaje nelinearnost u audio lanac koja ispravlja nelinearnost najmanje jednog elektroakustičkog pretvarača i/ili nelinearnost aproksimirane psihoakustične karakteristike ljudskog uha za promjenu tlaka kod ljudskog uha do p_∆.<BR/> <BR/>Predmetna metoda i uređaj (19) umanjuju ograničenja elektroakustičkih pretvarača kao i ljudskog uha dodajući nelinearnosti koje u konačnici umanjuju nelinearnosti čitavog audio lanca s ljudskim uhom, tj. dodavanje nelinearnosti u audio lanac na način tako da karakteristika audio lanca umanji nelinearnost polinomne aproksimacije ljudskog uha do promjene tlakova p<SUB>∆</SUB>=±1Pa.The present invention relates to a method and device for processing audio signals in an audio chain, which correct the nonlinearity of electroacoustic transducers in the audio chain by taking into account the nonlinear psychoacoustic characteristic of the human ear in such a way that the nonlinearities in the audio chain are added in a controlled manner to obtain a better sound picture and more details in sound reproduction using approximations of quadratic and polynomial functions of the fifth degree in some range. According to the present invention, the method consists of approximating, by using a nonlinear polynomial function of the fifth degree, the psychoacoustic characteristic of the human ear, and adding at least one nonlinear element (4) in front of at least one electroacoustic transducer in the audio chain; this nonlinear element (4) has such a function to add nonlinearity to an audio chain that corrects the nonlinearity of at least one electroacoustic transducer and/or the nonlinearity of the approximated psychoacoustic characteristics of the human ear to change the pressure in the human ear to p_∆. The audio signal processing device (19) according to the present invention comprises at least one nonlinear element (4) in an audio chain that has the function of adding nonlinearity to the audio chain that corrects the nonlinearity of at least one electroacoustic transducer and/or the nonlinearity of the approximated psychoacoustic characteristics of the human ear to change the pressure in the human ear to p_∆.<BR/><BR/>The present method and device (19) reduce the limitations of electro-acoustic transducers as well as the human ear by adding nonlinearities that ultimately reduce the nonlinearities of the entire audio chain with the human ear, i.e., adding nonlinearity to the audio chain in such a way that the audio chain characteristic reduces the nonlinearity of the polynomial approximation of the human ear to pressure changes p<SUB>∆</SUB> = ± 1Pa.