摘要
变换编码是音频压缩中一个重要部分，文中叙述MPEG音频编码标准中的变换编码技术，包括改进余弦变换和反变换（MDCT和IMDCT），时域混叠抵消与自适应窗选择，详细推导了MDCT和IMDCT的快速算法。
Transform coding is an important part of audio compression. In this article,the transform coding technique of MPEG audio coding standard was presented including Modified Discrete Cosine Transform and its Inverse Transform (MDCT & IMDCT),Time Domain Aliasing Cancellation (TDAC) and adaptive window selection. The derivation of MDCT and IMDCT fast algorithm were given in detail.
出处
《电声技术》
北大核心
1999年第7期3-6,共4页
Audio Engineering
关键词
改进余弦变换
MDCT
数字音频压缩
变换编码
Modified discrete cosine transform (MDCT), Time domain aliasing cancellation Adaptive window selection.
