Patent ID: 9196259
Filing Date: 2015-11-24
Classification: G10L,G11B

Abstract:
1. A copyright protection method of audio data of an electronic device, the method comprising: extracting a plurality of left channel audio signal values and a plurality of right channel audio signal values from a plurality of audio signals of an audio source of the electronic device; calculating a plurality of difference values between each of the left channel audio signal values and each of the corresponding right channel audio signal values; determining a time slot which is formed by a plurality of first audio signal values corresponding to a plurality of first difference values among the difference values, wherein each of the first difference values exceeds a threshold value and a time length of the time slot exceeds a preset time; respectively modulating a plurality of first left channel audio signal values and a plurality of first right channel audio signal values for the first audio signal values; and writing digital copyright information in corresponding positions of the time slot according to the modulating result.