1997/05/01 by Yui‐Lam Chan, Wan-Chi Siu · 4 citations
Computer Science · Mathematics · #Advanced Data Compression Techniques #Advanced Vision and Imaging #Algorithm #Algorithmic efficiency #Artificial intelligence #Coding (social sciences) #Coding tree unit #Computer science #Computer vision #Discrete cosine transform #Frame (networking) #Image (mathematics) #Inter frame #Lapped transform #Mathematics #Motion compensation #Redundancy (engineering) #Reference frame #Statistics #Telecommunications #Transform coding #Variable-length code #Video Coding and Compression Technologies
paper · doi:10.1109/83.568933
openalex publication_date 1997/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
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.