DocumentCode :
3456414
Title :
An Enhanced Prediction Method for All-Zero Block in H.264
Author :
Li, Mingwei ; Jia, Lei
Author_Institution :
Fac. of Electron. Inf. & Electr. Eng., Dalian Univ. Of Technol., Dalian, China
fYear :
2010
fDate :
21-23 Oct. 2010
Firstpage :
1
Lastpage :
5
Abstract :
During the process of H.264 encoding, after the operation of quantization, it will generate a lot of all-zero blocks. In this paper we analyses the feature of the coefficients of the 4×4 residual block after transformation, on that basis a new algorithm for predicting all-zero block is proposed. And then, we utilize the sum of absolute residual(SAD)of the block and obtain thresholds to predict the all-zero block. So we can avoid doing transformation, quantization, and other operations on them, thus reduce the computing time in encoding process. Finally we use the H.264 reference software on VC platform to simulate the method, and compare it with other methods which are involved in the paper. The simulation results show that our method have the prediction rate up to 95.1%, which is more effective than other methods. And at the same time, the loss of the image quality is less than 0.2dB, which can be ignored.
Keywords :
discrete cosine transforms; prediction theory; quantisation (signal); video coding; H.264 encoding; VC platform; all zero block; discrete cosine transform; image quality; integer DCT; prediction method; quantization; residual block; sum of absolute residual; Computational modeling; Discrete cosine transforms; Electrical engineering; Electronic mail; Encoding; Quantization; Software;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Pattern Recognition (CCPR), 2010 Chinese Conference on
Conference_Location :
Chongqing
Print_ISBN :
978-1-4244-7209-3
Electronic_ISBN :
978-1-4244-7210-9
Type :
conf
DOI :
10.1109/CCPR.2010.5659165
Filename :
5659165
Link To Document :
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