MPEG-2 AAC (ISO/IEC 13818-7) is a high efficient coding standard of multi-channel Hi-Fi audio, which provides better reconstructed audio than MP3 and AC-3 at 64kbps per channel.

• MPEG-2 AAC（ISO/IEC13818-7）是一种新型高效多声道Hi-Fi音频编码标准，在每声道64kbps时重建音质优于MP3和AC-3。