CAJ | 학술논문

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。
해문제출료일개괄용우저마솔시빈편마적기우대각선추양(DS- Diagonally Sampled)적혼합쾌속DCT편마방안,차방안포함일개신적3계수DCT산법,동시제출료기우DS적계산색도SAD(Sum of Absolute Difference)적방법용우유효준학지검측전령혹3계수적색도괴。저일혼합산법가이유효적강저DCT、IDCT、양화화반양화적운산량,제고편마기처리속도,이불회도치명현적도상질량적하강。
In this paper,a DS-Based hybrid DCT strategy is proposed,including a novel 3 coefficients DCT and an algorithm calculating chroma SAD(Sum of Absolute Difference)from Diagonally Sampled pixels is also introduced to effectively detect All-zero or Three-coefficient chroma blocks.This hybrid coding strategy efficiently decrease the computation of DCT,IDCT,quantization and inverse quantization,which achieves significant improvement in the processing speed with negligible video-quality degradation.