METHOD FOR SEPARATING A SOUND FRAME INTO SINUSOIDAL COMPONENTS AND RESIDUAL NOISE

摘要

This invention relates to a method of determining (10) a second sound frame (20) representing sinusoidal components and an optionally third sound frame (30) representing a residual from a provided first sound frame, the method includes the steps of: determining a sinusoidal component in the first sound frame among non extracted components; determining an importance measure (40) for the first sound frame; extracting the sinusoidal component from the first sound frame, and incorporating the sinusoidal component in the second sound frame; and repeating said steps until the importance measure fulfils a stop criterion (50). In the method, the step of determining an importance measure for the first sound frame can be executed before said third step or it can be executed between said third and fourth step. Said method further includes the step of: setting the third sound frame to the first sound frame, when the importance measure fulfils said stop criterion. This enables for that only necessarily sinusoidal components are extracted for use in a subsequent compression.