作为新一代最有效的高保真数字音频编码手段，MPEG AAC具有压缩比高，重建音频质量好，编解码过程模块化，声道配置灵活等特点，并且不同的层次具有不同的算法复杂度。-As a new generation of the most effective means of high-fidelity digital audio coding, MPEG AAC with high compression, the reconstruction

开源aac编码器,很多编码器都是通过该编码器优化而来的-Open Source aac encoder, many encoders are optimized by the encoder from the