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该文提出了一个适用于低码率视频编码的基于对角线抽样（ＤＳ－Ｄｉａｇｏｎａｌｌｙ Ｓａｍｐｌｅｄ）的混合快速 ＤＣＴ编码方案，此方案包含一个新的 ３系数ＤＣＴ算法，同时提出了基于 ＤＳ的计算色度ＳＡＤ（Ｓｕｍ ｏｆ Ａｂｓｏｌｕｔｅ Ｄｉｆｆｅｒｅｎｃｅ）的方法用于有效准确地检测全零或３系数的色度块。这一混合算法可以有效的降低ＤＣＴ、ＩＤＣＴ、量化和反量化的运算量，提高编码器处理速度，而不会导致明显的图象质量的下降。
This paper presents a hybrid fast DCT coding scheme for low bit rate video coding based on DS-Diagonally Sampled, which includes a new 3-coefficient DCT algorithm and a DS-based computational color The Sum of Absolute Difference (SAD) method is used to effectively and accurately detect all-zero or 3-coefficient chroma blocks. This hybrid algorithm can effectively reduce DCT, IDCT, quantization and inverse quantization operations, improve the encoder processing speed, without causing a significant decline in image quality.