Title :
A new DCT-mode selection scheme for DV standard
Author_Institution :
Center of STMicroelectronics, Asia Pacific Pte Ltd., Singapore
Abstract :
The digital camcorder system DV, which features advanced intraframe DCT-based video compression, has been successfully introduced for the consumer and semi-professional users. In DV standard, DCT-mode can be selected from two modes, 1×8×8 DCT-mode and 2×4×8 DCT-mode to improve picture quality after bit rate reduction. It is known that the 2×4×8 DCT-mode is selected in case of the big difference between two fields. It is also proven that the quality of 2×4×8 DCT-mode is better than that of the 1×8×8 DCT-mode when high motion is involved. This paper focuses on the new DCT-mode selection scheme that can improve the picture quality compared to the conventional method using a threshold optimization method. As a result both subjective and objective quality of the picture is improved as compared with the conventional scheme
Keywords :
code standards; data compression; digital communication; discrete cosine transforms; optimisation; telecommunication standards; transform coding; video cameras; video coding; DCT-mode selection scheme; DV standard; bit rate reduction; digital camcorder system; intraframe DCT-based video compression; objective picture quality; subjective picture quality; threshold optimization method; Bit rate; Data structures; Discrete cosine transforms; Discrete transforms; Image coding; Motion detection; Optimization methods; Video compression; Video equipment; Video recording;
Conference_Titel :
TENCON 2001. Proceedings of IEEE Region 10 International Conference on Electrical and Electronic Technology
Print_ISBN :
0-7803-7101-1
DOI :
10.1109/TENCON.2001.949581
