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- 저자 : Yuehou Yun (검색결과 2 건)
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Fast Macroblock Mode Selection Algorithm for B Frames in Multiview Video Coding
( Mei Yu ),( Ping He ),( Zongju Peng ),( Yun Zhang ),( Yuehou Si ),( Gangyi Jiang ) 한국인터넷정보학회 2011 KSII Transactions on Internet and Information Syst Vol.5 No.2
Intensive computational complexity is an obstacle of enabling multiview video coding for real-time applications. In this paper, we present a fast macroblock (MB) mode selection algorithm for B frames which are based on the computational complexity analyses between the MB mode selection and reference frame selection. Three strategies are proposed to reduce the coding complexity jointly. First, the temporal correlation of MB modes between current MB and its temporal corresponding MBs is utilized to reduce computational complexity in determining the optimal MB mode. Secondly, Lagrangian cost of SKIP mode is compared with that of Inter16×16 modes to early terminate the mode selection process. Thirdly, reference frame correlation among different Inter modes is exploited to reduce the number of reference frames. Experimental results show that the proposed algorithm can promote the encoding speed by 3.71~7.22 times with 0.08dB PSNR degradation and 2.03% bitrate increase on average compared with the joint multiview video model.
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Structural transformation, spectroscopic characterization and magnetic properties of La1xGdxCoO3
Yu Gao,Hong Chang,Qiang Wu,P. Suresh Kumar,Meiling Li,Fang Liu,Hongjing Zhu,Yanbo Pang,Yuehou Yun 한국물리학회 2016 Current Applied Physics Vol.16 No.8
La1xGdxCoO3 for x < 0.2 crystallize in the rhombohedral structure, and it is orthorhombic for x 0:2. The lattice volume systematically decreases as x increases. The analysis of the Co 2p3/2 xps spectra indicates that the Co ions are at both þ3 and þ8/3 valence states, and the calculated oxygen content is about 2.93 per formula unit. The bending vibration of the CoeO bond linearly shifts from 429 cm1 to 482 cm1 with the increasing x, and it is coincident with the increasing CoeOeCo angle. The shoulder peak at approximately 575 cm1 becomes obviously wide with the increasing doping Gd3þ content owing to the magnetic interactions of the Gd3þ ions with the surrounding CoO6 octahedra. The energy band gap slightly increases from about 2.40 eV to about 2.75 eV as the structure transforms from the rhombohedral to the orthorhombic structure. The magnetic properties are ferrimagnetic with x ¼ 0.05, 0.3 and 0.7. However, the calculated Curie-Weiss temperature and constant of La0.3Gd0.7CoO3 are not reasonable, it is probably due to a nonlocalized electronic state.
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