一、引言 在新世纪中，音频数字化将是音响产品不可逆转的发展方向。音频数字化的关键是深人研究压缩编码的算法，进一步探索音频信号的可压缩潜力。ＣＤ仍然会是音响的主流产品。 ９０年代以来，在达到ＣＤ音质的基础上，致力于压缩音频信号的数据量，以节约存储器的容量并降 I. Introduction In the new century, digital audio will be the irreversible development of audio products. The key to audio digitization is an in-depth study of the compression coding algorithm to further explore the compressibility of audio signals. CD will still be the mainstream audio products. Since 1990s, on the basis of achieving the CD quality, the data amount of audio signal has been compressed to save the memory capacity and reduce