fast discrete cosine transform

例句：

1. 1.The fast discrete cosine transform is a popular technique for image compression.
   快速离散余弦变换是一种流行的图像压缩技术。
2. 2.In the field of signal processing, the fast discrete cosine transform is widely used for data compression.
   在信号处理领域，快速离散余弦变换被广泛用于数据压缩。
3. 3.The fast discrete cosine transform has been shown to be effective in reducing image noise and improving image quality.
   快速离散余弦变换已被证明能有效降低图像噪声并提高图像质量。