Patent ID: 9262521
Filing Date: 2016-02-16
CPC Classification: G06F,G10H,G10L,G11B,H04N

Claim Text:
1. An apparatus for extracting a highlight section of music so as to play the highlight section by analyzing an input music file, comprising: a frame divider that divides the input music file into a plurality of frames having a predetermined sample length; an average energy signal calculator that calculates a signal representing an average audio energy magnitude for a plurality of samples belonging to each frame for each frame of the plurality of frames; a highlight section selector that extracts a low frequency signal from the signal representing the average audio energy magnitude for each frame and determines the highlight section from frame sections including maximum points of the low frequency signal; and a start point searcher that searches for a start point of the highlight section from the input music file by using a position of a first frame of the highlight section determined by the highlight section selector and sample lengths of each frame, wherein the highlight section selector includes a primary highlight candidate group selector that selects the frame sections that include maximum points of low frequency signals as primary highlight section candidate groups, wherein the highlight section selector further includes a secondary highlight candidate group selector that selects secondary highlight section candidate groups from the primary highlight section candidate groups by determining whether the input music file is an instrumental music file, and wherein the secondary highlight candidate group selector selects all frame sections belonging to the primary highlight section candidate groups as the secondary highlight section candidate groups if it is determined that the input music file is the instrumental music file, and selects frame sections including voice signals among the frame sections belonging to the primary highlight section candidate groups as the secondary highlight section candidate groups if it is determined that the input music file is not the instrumental music file.