The modified discrete cosine transform ( MDCT ) is the most commonly used algorithm in digital signal processing. In this paper, A MDCT spectrum optimization technique based on the subtraction of stationary sinusoidal components is presented. 通过研究信号中正弦成分对改进的离散余弦变换(MDCT)的频谱产生的影响,针对使用MDCT滤波器组的音频编码系统,结合正弦参数提取,提出了一种对MDCT频谱进行优化的方法。
But the encoded domain of MP3-MDCT ( modified discrete cosine transform ) coefficients has a fast-changing sign makes them difficult to interpolate. 但是MP3的编码域-MDCT(modifieddiscretecosinetransform)域的系数有着快速变化的符号,难以直接对它进行插值。
Modified discrete cosine transform ( MDCT ) and IMDCT, which are lapped orthogonal transform used in signal processing, are two of the most intensive computational operation in the MPEG audio coding standard. MDCT和IMDCT是2种重叠正交变换,也是MPEG音频标准中运算量最大的2种运算,主要应用在数字信号处理当中。
Modified discrete cosine transform ( MDCT ) is widely used in audio compression, such as the MPEG audio layer III codec. 修正离散余弦变换(MDCT)在音视频信号编码中得到广泛地应用,其快速算法在实时编解码系统中尤为重要。
And the one-dimensional discrete cosine transform is realize with a modified Loeffler fast algorithm. Largely reduce the complexity of the hardware implementation, improve the processing speed of two-dimensional discrete cosine transform. 并采用改进算法结构的Loeffler快速算法实现一维离散余弦变换,减少了硬件实现的复杂度,提高了二维离散余弦变换的处理速度。