Implementation of MPEG-4 audio player on embedded devices

摘要

Because small mobile devices do not include a floating-point processing unit due to their circuit complexity and power consumption, there exist some disconnections or noises caused by lengthening the decoding time of audio data. This study proposes an algorithm that improves the decoding rate through the conversion of a real operation process to an integer operation process applied in an MPEG-4 audio decoding process in order to solve this problem. Moreover, this study implements the software that plays the MPEG-4 AAC data in real-time in embedded Linux based mobile devices and verifies the possibility of the replay of MPEG-4 audio data in its error range through the results of related experiments.