Title :
Early Detection of AZB in H.264 Based on Gaussian Distribution Model
Author :
Xie, Zhengguang ; Liu, Yong ; Liu, Wenjun ; Yang, Tiejun
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
To reduce the computation complexity of discrete cosine transform (DCT) and quantization in H.264 video coding, a highly effective algorithm to detect all-zero DCT coefficient blocks (AZB) before DCT is proposed, after analyzing the distribution model of DCT coefficients and the properties of the integer DCT and quantization. Experimental results show that the detection ratio of the proposed algorithm achieves up to 98% and up to 47% higher than that of the existing methodologies.
Keywords :
Gaussian distribution; computational complexity; discrete cosine transforms; video coding; AZB detection; Gaussian distribution model; H.264 video coding; all-zero DCT coefficient blocks detection; computation complexity; discrete cosine transform; Algorithm design and analysis; Cities and towns; Discrete cosine transforms; Distributed computing; Gaussian distribution; Motion compensation; Predictive coding; Quantization; Video coding; Video sequences;
Conference_Titel :
Circuits and Systems, 2006. MWSCAS '06. 49th IEEE International Midwest Symposium on
Conference_Location :
San Juan
Print_ISBN :
1-4244-0172-0
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2006.382223
