Fast DCT image resizing and video compositing for multi-point video conferencing Szybkie skalowanie i składanie obrazów wideo z wykorzystaniem dyskretnej transformacji kosinusowej, na potrzeby wielopunktowej wideo-konferencji

ILGIN H. A., İLK H. G., Voznak M., Chaparro L. F.

Przeglad Elektrotechniczny, cilt.89, sa.2 B, ss.193-198, 2013 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 89 Sayı: 2 B
  • Basım Tarihi: 2013
  • Dergi Adı: Przeglad Elektrotechniczny
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.193-198
  • Anahtar Kelimeler: DCT decimation, DCT interpolation, Image resizing, Multi-point video conferencing, Significance map coding, Transcoding, Video compositing, Zerotree coding
  • Ankara Üniversitesi Adresli: Evet

Özet

Video conferencing is a real time process that requires fast operations. In this paper a Discrete Cosine Transform (DCT)-based video compositing structure for multi-point video conferencing with a fast DCT method for integer and rational image resizing is presented. Whole compositing process is kept in the DCT domain to avoid comprehensive operations. Our procedure does not only improve speed but also the quality of the resized video frames. Proposed method is illustrated and compared with other methods by means of simulation results with different video sequences.