Yu Liu

Publications (5)0 Total impact

• Conference Proceeding: A new architecture for MPEG-2 to MPEG-4 FGS transcoding

  Xiaowei Song, Jianfu Teng, Wei Lu, Yu Liu, Lei Yang
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  ABSTRACT: In order to correct the in-compatible errors of chroma motion compensation when transcoding MPEG-2 to MPEG-4 FGS, a new intra-refresh correction structure is adopted in the proposed architecture. In addition, an encoding loop is included in the suggested architecture for the purpose to prevent the quant error drifts in the MPEG-4 re-quantization part. Combined with these two structures, the proposed architecture can transcode a MPEG-2 elemental stream to MPEG-4 FGS streams smoothly. Comparing with several other architectures, it is shown that the suggested one has the best performance.
  Consumer Electronics, 2005. (ISCE 2005). Proceedings of the Ninth International Symposium on; 07/2005
• Conference Proceeding: H.264/MPEG-2 transcoding based on personal video recorder platform

  Jinghui Chu, Wei Lu, Yu Liu, Yuan Song, Xiaowei Song, Sile Yu
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  ABSTRACT: In this paper, a scheme of applying H.264/MPEG-2 program transcoding on personal video recorder (PVR), home gateway or multimedia server is proposed, which enables PVR to play the H.264 programs. A transcoding architecture which reuses the motion vectors in the source H.264 stream is further presented. Experimental results show that this architecture is more efficient than a cascaded pixel domain transcoder while provides fairly good video quality. To our knowledge, there is no known research on H.264/MPEG-2 video transcoding or its application on consumer electronics.
  Consumer Electronics, 2005. (ISCE 2005). Proceedings of the Ninth International Symposium on; 07/2005
• Conference Proceeding: A new method of selective enhancement for MPEG-2 to MPEG-4 FGS transcoding

  Xiaowei Song, Yu Liu, Qinggang Meng, Jianfu Teng, Guiling Li
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  ABSTRACT: Not Available
  Consumer Electronics, 2004 IEEE International Symposium on; 02/2004
• Conference Proceeding: MV-based adaptive transcoding technique for reduced spatial resolution

  Yan Xu, Qinggang Meng, Yu Liu, Ying Guo, Guiling Li
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  ABSTRACT: Not Available
  Consumer Electronics, 2004 IEEE International Symposium on; 02/2004
• Conference Proceeding: A fast Intra Mode Decision Algorithm for MPEG-2 to H.264 Video Transcoding

  Li Wang, Qi Wang, Yu Liu, Wei Lu
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  ABSTRACT: With the developments of digital multimedia technologies, MPEG-2 to H.264 transcoding will become universal requirements in various applications. Compared with MPEG-2, H.264 uses some new compressing methods. One of these methods is intra prediction. This paper proposed some intra prediction mode decision algorithms for MPEG-2 to H.264 transcoding. In our experiments, the suggested fast mode decision method is compared with H.264 JM10.1, results show that our algorithm can reduce the computation while maintaining similar PSNR performance
  Consumer Electronics, 2006. ISCE '06. 2006 IEEE Tenth International Symposium on;