Title :
A modified hybrid DCT-SVD image-coding system
Author :
Wongsawat, Y. ; Ochoa, H. ; Rao, K.R.
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA
Abstract :
This paper proposes a hybrid image-coding system that combines the DCT and the SVD. A criterion based on the standard deviation of 8×8 blocks of an image is used to choose between DCT and SVD. The DCT is used to transform the high correlated blocks of the image, while the SVD is used to transform the low correlated blocks. The AMVQ is used to encode the eigenvectors of the blocks encoded using the SVD and the uniform quantization is used to encode the DCT coefficients. The simulation results show good image quality at low bit rates.
Keywords :
block codes; discrete cosine transforms; image coding; quantisation (signal); singular value decomposition; block code; eigenvector; hybrid DCT-SVD image-coding system; uniform quantization; Bit rate; Discrete cosine transforms; Eigenvalues and eigenfunctions; Image coding; Image quality; Image reconstruction; Matrix decomposition; Vector quantization; Video compression; Videoconference;
Conference_Titel :
TENCON 2004. 2004 IEEE Region 10 Conference
Print_ISBN :
0-7803-8560-8
DOI :
10.1109/TENCON.2004.1414425
