Patent ID: 9047861
Filing Date: 2015-06-02
Classification: G10L,H04S

Abstract:
1. An electronic device for converting audio file format, having a storage unit storing a multichannel audio file containing a left channel group and a right channel group both of which have N channel signals and N is at least two, and a processor to perform a method comprising steps of: mixing left channel signals of the left channel group through a mixed matrix which is a N×N matrix to form N left mixed signals; cross embedding the N left mixed signals to form a left channel audio signal; mixing right channel signals of the right channel group through the mixed matrix to form N right mixed signals; and cross embedding the N right mixed signals to form a right channel audio signal; wherein the left channel audio signal and the right channel audio signal compose a dual channel audio file, the storage unit stores a decoding matrix which is the inverse of the mixed matrix, and the dual channel audio signal is converted to the multichannel audio file through the decoding matrix by sampling the dual channel audio signal in M sampling times, wherein a sampled data which the remainder of M/N is 1 is arranged as a first signal, a sampled data which the remainder of M/N is 2 is arranged as a second signal, and a sampled data which the remainder of M/N is 0 is arranged as a N signal.