Title :
Fast approximation of DCT kernel in JPEG
Author :
Marcek, Anton ; Rozinaj, Gregor
Author_Institution :
Dept. of Telecommun., Slovak Univ. of Technol., Bratislava, Slovakia
Abstract :
In this paper a new approach to the approximation of Modified Integer Cosine Transform (MICT) without multiplication will be introduced. An application of this method in JPEG standard for a compression of images is analysed and discussed. An error analysis of the approximation shows very good results. Nevertheless, an accuracy of the algorithm vs. speed can be very easily optimised. Combination of standard JPEG and JPEG based on proposed algorithm has been analysed. An example at the end of this paper shows practical experience with the method.
Keywords :
approximation theory; data compression; discrete cosine transforms; error analysis; image coding; integer programming; DCT kernel; JPEG standard; MICT; algorithm accuracy; discrete cosine transforms; error analysis; fast approximation; image compression; modified integer cosine transform; speed accuracy; Algorithm design and analysis; Approximation algorithms; Approximation methods; Discrete cosine transforms; Image coding; Transform coding; Image compression; discrete cosine transform. JPEG;
Conference_Titel :
Signal Processing Conference (EUSIPCO 1998), 9th European
Conference_Location :
Rhodes
Print_ISBN :
978-960-7620-06-4
