Patent ID: 7171245

Claim:
A method for keeping a musical tone from becoming a wind shear sound, comprising: adding a small section of silence or signal music whose energy is smaller than an energy threshold defined by a mobile communication system at a proper position of a music recording file, so that the mobile communication system will not erroneously judge a musical tone of the music recording file as being background music and thereby avoid a situation such that the musical tone becomes a wind shear sound, wherein the mobile communication system employs a VAD (voice activation detection) algorithm, and wherein adding a small section of silence or signal music whose energy is smaller than the energy threshold defined by the mobile communication system at a proper position comprises the steps of: (A) judging a position where the mobile communication system makes an erroneous judgment for an input music file according to the VAD algorithm of the mobile communication system; (B) searching forward from the position judged by step (A) and inserting a small section of silence at a position where the amplitude of an original signal is lowest within a predetermined area to generate a new music file; and (C) using the new music file generated in step (B) as the input music file in step (A) and repeating step (A) and step (B) until the input music file will not be erroneously judged as a background music by the VAD algorithm of the mobile communication system.