Media playing apparatus possessing voice enhancement function

A media playing apparatus comprises a first signal superposition module, a first blind source separation module, a second blind source separation module, a second signal superposition module, a voice gain adjustment module, a third signal superposition module and a fourth signal superposition module, wherein the first signal superposition module superposes first and second sound channel signals so as to generate a sound channel superposition signal; the first blind source separation module carries out blind source separation on the first sound channel signal and the sound channel superposition signal so as to generate a first voice signal with a small amount of background sound and a first background sound signal with a small amount of voice; the second blind source separation module carries out blind source separation on the second sound channel signal and the sound channel superposition signal so as to generate a second voice signal with a small amount of background sound and a second background sound signa