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Variable temporal-length 3-D discrete cosine transform coding

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2 Author(s)
Yui-Lam Chan ; Dept. of Electron. Eng., Hong Kong Polytech. Univ., Kowloon, Hong Kong ; Wan-Chi Siu,

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

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Image Processing, IEEE Transactions on  (Volume:6 ,  Issue: 5 )