Title :
Frequency based down-sampling/up-sampling algorithm for chrominance component
Author :
Yang, Xu ; Chang, Yilin ; Huo, Junyan ; Li, Bingbing
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´´an, China
Abstract :
Down-sampling filter is employed to obtain 4:2:0 chroma format and up-sampling filter is used for display. Currently, the existing algorithms are processed in spatial domain. In this paper, a frequency domain based down-sampling and up-sampling filter is proposed. With this algorithm, more original information can be preserved and aliasing can be avoided in chrominance components. Simulation results show that average 0.21 dB coding gain can be achieved by using the proposed algorithm compared with MPEG-4 filter.
Keywords :
filtering theory; frequency-domain analysis; image sampling; video coding; MPEG-4 filter; aliasing; chrominance component; down-sampling filter; frequency-domain method; up-sampling filter; Cities and towns; Color; Ice; Indexes; Manganese; PSNR; Petroleum; DCT; RGB; chrominance sampling; filter;
Conference_Titel :
Computer and Communication Technologies in Agriculture Engineering (CCTAE), 2010 International Conference On
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-6944-4
DOI :
10.1109/CCTAE.2010.5543412
