TR2005-039

Efficient MPEG-2 to H.264/AVC Intra Transcoding in Transform-domain

    •  Su, Y., Xin, J., Vetro, A., Sun, H., "Efficient MPEG-2 to H.264/AVC Intra Transcoding in Transform-domain", IEEE International Symposium on Circuits and Systems (ISCAS), May 2005, vol. 2, pp. 1234-1237.
      BibTeX TR2005-039 PDF
      • @inproceedings{Su2005may,
      • author = {Su, Y. and Xin, J. and Vetro, A. and Sun, H.},
      • title = {Efficient MPEG-2 to H.264/AVC Intra Transcoding in Transform-domain},
      • booktitle = {IEEE International Symposium on Circuits and Systems (ISCAS)},
      • year = 2005,
      • volume = 2,
      • pages = {1234--1237},
      • month = may,
      • url = {https://www.merl.com/publications/TR2005-039}
      • }
  • MERL Contacts:
  • Research Area:

    Digital Video

Abstract:

In this paper, we propose a transform-domain MPEG-2 to H.264/AVC intro video transcoder. In the transcoder, the input DCT coefficients are first converted to H.264 transform (HT) coefficients entirely in the transform-domain. Rate-distortion optimized macroblock mode decision is then performed based on the HT coefficients. Finally, the HT coefficients are coded using the selected modes to generate the output H.264 bitstream. The proposed transcoder is equivalent to the conventional pixel-domain implementation in terms of functionality, but its complexity is sifnificantly lower (on average over 20%). To further reduce its computational complexity, we propose a fast mode decision algorithm based on a simple cost function calculated in the HT-domain. This fast algorithm reduces the complexity requirement about 50%, while maintains virtually the same coding efficiency.

 

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