Patent ID: 8744089
Filing Date: 2014-06-03
Classification: H04S

Abstract:
1. A method of encoding stereo audio, the method comprising: adding adjacent input audio signals to generate at least one beginning mono audio signal, the adjacent input audio signals being adjacent to each other among N received input audio signals of N channels of the stereo audio; if the at least one beginning mono audio signal is not a single final mono audio signal, consecutively adding adjacent mono audio signals to generate the single final mono audio signal; generating side information for restoring the N input audio signals, each of the mono audio signals obtained to generate the final mono audio signal and the final mono audio signal; and encoding the final mono audio signal and the side information, wherein the encoding of the side information comprises encoding information for determining intensities of each of the N input audio signals and the mono audio signals obtained to generate the final mono audio signal, wherein the encoding of the information for determining intensities comprises generating a third vector by adding a first vector and a second vector; and encoding at least one of information about an angle between the third vector and the first vector and information about an angle between the third vector and the second vector.