title: Variable temporal-length 3-D discrete cosine transform coding.
abstract: Three-dimensional discrete cosine transform (3-D DCT) coding has the advantage of reducing the interframe redundancy among a number of consecutive frames, while the motion compensation technique can only reduce the redundancy of at most two frames. However, the performance of the 3-D DCT coding will be degraded for complex scenes with a greater amount of motion. This paper presents a 3-D DCT coding with a variable temporal length that is determined by the scene change detector. Our idea is to let the motion activity in each block be very low, while the efficiency of the 3-D DCT coding could be increased. Experimental results show that this technique is indeed very efficient. The present approach has substantial improvement over the conventional fixed-length 3-D DCT coding and is also better than that of the Moving Picture Expert Group (MPEG) coding.
authors.affiliation: Dept. of Electron. Eng., Hong Kong Polytech. Univ., Kowloon.
authors.forename: Y L
authors.initials: YL
authors.lastname: Chan
authors.forename: W C
authors.initials: WC
authors.lastname: Siu