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该文介绍了一种建立在心理声学基础上的适用于宽频带数字音频信号的数据压缩技术.我们利用计算机对整个编解码算法的全部过程进行了模拟,并采用Motorola公司的数字信号处理芯片DSP56009作为硬件平台,实现了高质量的音频信号压缩编码.试验效果压缩比达到1/10以下,没有明显的音质衰减.“,”In this paper an adaptive transform coding algorithm on high quality audio compression is discussed. A modified DCT(MDCT) based on Time Domain Aliasing Cancellation(TDAC) with adaptive block size has been introduced to reduce pre-echo and block boundary noise. The whole simulation hare been accomplished with a PC and the realtime implementation is realized with Motorolas DSP56009.