Improving Quality of Video Signals Encoded by 3D DCT Transform

Author

Fryza, Tomas

Author_Institution

Inst. of Radio Electron., Brno Univ. of Technol.

fYear

2006

fDate

38869

Firstpage

89

Lastpage

93

Abstract

This paper deals with the properties of a compression method based on the 3D DCT. During the video compression process with 3D DCT the image data are transformed into frequency domain and the cross-correlation between adjacent pixels and even between frames is being removed without any quality loss. By implementing the quantization and thresholding operations, the number of 3D DCT coefficients is reducing. The situation is even worse while a group of encoded frames contains several types of video sequences, i.e. the cut is presents. In decompressed sequence the disturbing cross-fade effect is perceptible. In the next text a method for removing this effect based on the 3D DCT coder modifications is described

Keywords

correlation methods; data compression; discrete cosine transforms; frequency-domain analysis; image sequences; video coding; 3D DCT transform; coder modification; cross-correlation; cross-fade effect; frequency domain; quantization; video compression method; video encoding; video sequences; video signal quality; Discrete cosine transforms; Electronic mail; Equations; Image coding; Quantization; RF signals; Signal processing; Streaming media; Video compression; Video sequences; 3D DCT; Compression; cross-fade effect elimination; improving quality; video signal;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia Signal Processing and Communications, 48th International Symposium ELMAR-2006 focused on

Conference_Location

Zadar

ISSN

1334-2630

Print_ISBN

953-7044-03-3

Type

conf

DOI

10.1109/ELMAR.2006.329522

Filename

4127495