Title :
New DCT computation algorithm for video quality scaling
Author :
Mietens, Stephan ; de With, P.H.N. ; Hentschel, Christian
Author_Institution :
Eindhoven Univ. of Technol., Netherlands
fDate :
6/23/1905 12:00:00 AM
Abstract :
The application of video coding systems, such as MPEG, in portable systems like organizers and mobile phones can be scaled down to a reduced complexity that matches with the desired video quality and/or display. A new DCT computation algorithm is presented, based on an analysis for optimizing the number of computations involved at each computing stage, using existing fast DCT calculation algorithms. The analysis is used to scale down the video quality, thereby lowering the computing power and resource usage. Compared to a diagonally oriented computation of coefficients that matches with the conventional MPEG scanning, a 2 to 4 dB SNR improvement is obtained when scaling down the video quality to half the computing resources
Keywords :
computational complexity; data compression; discrete cosine transforms; transform coding; video coding; DCT computation algorithm; MPEG; SNR; computing power; mobile phones; personal organizers; portable systems; resource usage; video coding; video compression; video display; video quality scaling; Application software; Bandwidth; DVD; Discrete cosine transforms; Discrete transforms; Displays; TV; Transform coding; Video compression; Videoconference;
Conference_Titel :
Image Processing, 2001. Proceedings. 2001 International Conference on
Conference_Location :
Thessaloniki
Print_ISBN :
0-7803-6725-1
DOI :
10.1109/ICIP.2001.958151