Half-Pixel Correction for MPEG-2/H.264 Transcoding

  • Soon-young Kwon
  • Joo-kyong Lee
  • Ki-dong Chung
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3617)


To improve video quality and coding efficiency, H.264/AVC [1] has adopted several newer coding tools such as a 4×4 integer DCT and a method for calculating half pixels than the previous standards. However, these tools require additional work to transcode video content for pre-coded in the previous standards to H.264/AVC in the DCT domain. In this paper, we propose, as far as we know, the first half-pixel correction method for MPEG-2 to H.264 transcoding in the DCT domain. In the proposed method, an MPEG-2 block is added to the correction block obtained from the difference between half-pixel values of the two standards using a DCT reference frame. Experimental results show that the proposed method achieves better quality than the pixel based transcoding method.


Video Code Standard Input Block Previous Standard Correction Block Improve Video Quality 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Wiegand, T., Sullivan, G.J., Bjontegaard, G., Luthra, A.: Overview of the H.264/AVC video coding standard. IEEE Trans. Circuits Syst. Video Technol. 13, 560–576 (2003)CrossRefGoogle Scholar
  2. 2.
    Ostermann, J., Bormans, J., List, P., Marpe, D., Narroschke, M., Pereira, F., Stockhammer, T., Wedi, T.: Video Coding with H.264/AVC: Tools, Performance, and Complexity. IEEE Circuits Syst. Magazine 4(1), 7–28 (2004)CrossRefGoogle Scholar
  3. 3.
    Kalva, H.: Issues in H.264/MPEG-2 Video Transcoding. In: Consumer Communications and Networking Conference, CCNC 2004. First IEEE, Los Alamitos (2004)Google Scholar
  4. 4.
    Vetro, A., Christopoulos, C., Sun, H.: Video Transcoding Architectures and Techniques: An Overview. IEEE Signal Processing Magazin 20(2), 18–29 (2003)CrossRefGoogle Scholar
  5. 5.
    ISO/IEC 13818-2:1995(E) pp. 83–100Google Scholar
  6. 6.
    Richardson, I.E.G.: H.264 and MPEG-4 Video Compression. Wiley, Chichester (2003)CrossRefGoogle Scholar
  7. 7.
    Cao, G., Lei, Z., Li, J., Georganas, N.D., Zhu, Z.: A Novel DCT Domain Transcoder for Transcoding Video Streams with Half-pixel Motion Vectors. Real-Time Imaging (Elsevier Science) 10(5), 331–337 (2004)CrossRefGoogle Scholar
  8. 8.
    Shanableh, T., Ghanbari, M.: Hybrid DCT/pixel domain architecture for heterogeneous video transcoding. Signal processing: Image Communication 18, 601–620 (2003)CrossRefGoogle Scholar
  9. 9.
    Quantization/DCT Conversion Scheme for DCT-domain MPEG-2 to H.264/AVC Transcoding. IEICE Trans. Communication (July 2005) (accepted)Google Scholar
  10. 10.
  11. 11.

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Soon-young Kwon
    • 1
  • Joo-kyong Lee
    • 1
  • Ki-dong Chung
    • 1
  1. 1.Dept. Of Computer EngineeringPusan National UniversityBusanKorea

Personalised recommendations