DocumentCode :
464704
Title :
Macroblock-level Reduced Resolution Video Coding Allowing Adaptive DCT Coefficients Selection
Author :
Hao, Qiang ; Ji, Xiangyang ; Huang, Qingming ; Zhao, Debin ; Gao, Wen ; Chen, Xilin
Author_Institution :
Inst. of Comput. Technol., Chinese Acad. of Sci., Beijing
fYear :
2007
fDate :
27-30 May 2007
Firstpage :
529
Lastpage :
532
Abstract :
Reduced resolution update (RRU) video coding provides a better compression performance than H.264/AVC does. It is implemented by encoding the predicted residuals after down-sampling at the encoder and at the decoder, is up-sampled to the full-resolution size while motion compensation prediction signal are still yielded in the full-resolution spatial domain. In this paper, the authors first extend the frame-level RRU to the macroblock-level to obtain better coding performance than the frame-level RRU. Furthermore, a novel macroblock-level reduced resolution coding scheme was proposed which adaptively selects the part of DCT coefficients in the zigzag scan order to obtain better coding efficiency in terms of rate distortion performance. Experimental results exhibit that the proposed methods can achieve obvious improvements in both compression efficiency and decoding complexity compared with the frame-level RRU and H.264/AVC.
Keywords :
discrete cosine transforms; video coding; adaptive DCT coefficient selection; macroblock-level reduced resolution video coding; rate distortion performance; reduced resolution update; zigzag scan order; Automatic voltage control; Bit rate; Decoding; Discrete cosine transforms; Interpolation; Motion estimation; Quantization; Rate-distortion; Spatial resolution; Video coding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
Type :
conf
DOI :
10.1109/ISCAS.2007.378687
Filename :
4252688
Link To Document :
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