Title :
DCT approximation for low bit rate coding using a conditional transform
Author :
De Queiroz, Ricardo L.
Author_Institution :
Xerox Corp., Webster, NY, USA
Abstract :
A transform approximation is explored for speeding up the software compression of images and video. It is used to replace the regular DCT whenever only a few DCT coefficients are actually encoded. A conditional transform is proposed to transform only the data that it determines to be relevant. The approximation is applicable to environments combining the requirements of high compression and low complexity.
Keywords :
approximation theory; computational complexity; data compression; discrete cosine transforms; image coding; transform coding; video coding; visual communication; DCT approximation; conditional transform; high compression; image compression; image transmission; low bit rate coding; low complexity; transform approximation; video compression; Bit rate; Discrete cosine transforms; Discrete transforms; Frequency estimation; Image coding; Image communication; Internet; Quantization; Transform coding; Video compression;
Conference_Titel :
Image Processing. 2002. Proceedings. 2002 International Conference on
Print_ISBN :
0-7803-7622-6
DOI :
10.1109/ICIP.2002.1038003
