PROGRESS: Completed Project	PROJECT REF: CUHK/04/ENG/164
PROJECT TITLE: Conversion between ICT and DCT coefficients
PROJECT DESCRIPTION: In the recent decades, JPEG, MPEG 1 and 2, which employ Discrete Cosine Transform (DCT) for coding, are widely used. This trend keeps growing rapidly as handheld digital image/video cameras become more and more popular in recent years. On the other hand, another transform, Integer Cosine Transform (ICT) which is an integer version of the DCT requiring mainly shift and addition operations, receives growing attention. An order-4 ICT and order-8 ICT ICT(10,9,6,2;10,4;8) were adopted in H.264 and AVS video coding standards respectively. Therefore, it is anticipated that there will be a growing demand for transcoding between video sequences coded using DCT based methods and those coded using ICT based methods. This invention provides a fast and efficient method for the conversion between order-8 DCT and ICT coefficients, which is an essential step in the transcoding operation. The ICT can be ICT(10,9,6,2;10,5;8), ICT(10,9,6,2;9,3;8), ICT(10,9,6,2;8,4;8) and ICT(10,9,6,2;10,4;8).
FOCUS AREA(S): Communications Technologies
KEYWORDS: AVS; integer costine transform; transcoding; MPEG1; MPEG2
MODE OF COLLABORATION: licence
STATUS PATENT: Patent Pending	PATENT NO: NA
ORGANIZATION: CUHK
CONTACT PERSON: Mr Billy Lam	EMAIL: billylam@cuhk.edu.hk
TEL: (852) 2609 8882	FAX: (852) 2603 5451
WEBSITE: http://www.cuhk.edu.hk/rtao/patent/	DATE: