DCT-domain coder for digital video applications

Alex Ginzburg, Evgeny Kaminsky, Yuri Abramov, Ofer Hadar

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Recent home networking services such as next generation game consoles, video-on-demand, HDTV, etc. require faster video encoders and transcoders that avoid over-complicated transformations. In most popular digital video coding standards such as MPEG-X or H.26x, discrete cosine transform (DCT), inverse DCT (IDCT) transform, and block matching algorithms are essential elements in the coding process. The transforms between the pixel and DCT domains, are taking place during the operations and being only intermediate calculations, which complicate the encoding process. Thus, it is advantageous to reduce the number of transform operations between the spatial and frequency domains in order to simplify the overall encoder structure. In this paper we propose a DCT domain video encoder for reducing processing time. This is achieved by excluding the intermediate DCT and IDCT transforms from the conventional hybrid encoder. This is achieved by calculating the motion estimation and motion compensation via a spatial relationship between the DCT coefficients of a specific block and its sub-blocks. Experimental results of this method were compared to those of the conventional hybrid video encoder in the sense of visual quality and computational complexity. The comparison shows that the computational complexity of the proposed encoder is lower by 12.5% in comparison to conventional hybrid video coder for the same visual quality.

Original languageEnglish
Title of host publicationITRE 2006 - 4th International Conference on Information Technology
Subtitle of host publicationResearch and Education, Proceedings
PublisherInstitute of Electrical and Electronics Engineers
Number of pages5
ISBN (Print)1424408598, 9781424408597
StatePublished - 1 Jan 2006
EventITRE 2006 - 4th International Conference on Information Technology: Research and Education - Tel-Aviv, Israel
Duration: 17 Oct 200618 Oct 2006

Publication series

NameITRE 2006 - 4th International Conference on Information Technology: Research and Education, Proceedings


ConferenceITRE 2006 - 4th International Conference on Information Technology: Research and Education


  • DCT
  • Hybrid DCT coder
  • IDCT
  • ME

ASJC Scopus subject areas

  • General Computer Science
  • Information Systems
  • Information Systems and Management


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