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Volume 29 Issue 8
Jan.  2011
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Li Xiao-hui. An Improved Algorithm for Reduced Spatial Resolution Video Transcoding[J]. Journal of Electronics & Information Technology, 2007, 29(8): 1900-1902. doi: 10.3724/SP.J.1146.2006.00212
Citation: Li Xiao-hui. An Improved Algorithm for Reduced Spatial Resolution Video Transcoding[J]. Journal of Electronics & Information Technology, 2007, 29(8): 1900-1902. doi: 10.3724/SP.J.1146.2006.00212

An Improved Algorithm for Reduced Spatial Resolution Video Transcoding

doi: 10.3724/SP.J.1146.2006.00212
  • Received Date: 2006-02-27
  • Rev Recd Date: 2007-08-04
  • Publish Date: 2007-08-19
  • An algorithm of improved reduced spatial resolution video transcoding is proposed in this paper. An adaptive intra-refresh scheme is presented based on the relation between drift error and motion activity of inter-coded blocks. The thresholds are dynamically adjusted according to the difference between the target bit rate and actual bit rate. This method can reduce the bit rate of intra coded frames while still maintating error robustness and limiting temporal propagation of errors. Besides, a linear rate control strategy is also present. In order to reduce computational complexity, the rate-distortion function can be mapped into a linear function. The simulation results show that the buffer fullness tend to be stabilized and the PSNR of the reconstructed image is raised.
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  • Christopoulos B. Transcoder architectures for video coding. IEEE Trans. on Consumer Electronics, 19981, 44(1): 88-98.[2]Iwasaki O, Uenoyama T, and Ando A, et al.. Video transcoding technology for wireless communication systems. In Proc. IEEE Int. Conf. VTC, Boston (U.S.A.), 2000: 1577-1580.[3]Shanableh T and Gganbari M, et al.. Heterogeneous video transcoding to lower spatio-temporal resolutions and different encoding formats[J].IEEE Trans. on Multimedia.2000, 2(2):101-110[4]Yin P, Vetro A, and Liu B, et al.. Drift compensation for reduced spatial resolution transcoding[J].IEEE Trans. on Circuit and System for Video Technology.2002, 12(11):1009-1019[5]He Z, Kim Y K, and Mitra S K, et al.. Low delay rate control for DCT video coding via -domain source modeling[J].IEEE Trans. on Circuit and System for Video Technology.2001, 11(8):928-940[6]He Z and Mitra S K, et al.. A line source model and a unified rate control algorithm for DCT video coding[J].IEEE Trans. on Circuit and System for Video Technology.2002, 12(11):970-982[7]Li Xiaohui. Video transcoding for wireless mobile Internet access. In Proc. Asia-Paciffic Optical and Wireless Communication Conference and Exhibition (APOC), Wuhan (China), SPIE, 2003, 5284: 498-503.
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