Title :
Efficient method for early detection of all-zero DCT coefficients
Author :
Jun, Shi ; Yu, Songyu
Author_Institution :
Inst. of Image Commun. & Inf. Process., Shanghai Jiaotong Univ., China
fDate :
2/1/2001 12:00:00 AM
Abstract :
Based on the existing method, a more efficient algorithm for detecting all-zero DCT coefficient blocks before implementation of the discrete cosine transform and quantisation in very low bit rate video coding is proposed. The problem of the existing method is shown and an improved algorithm is provided. Simulation shows that the new method improves the detecting performance by ~10-20%
Keywords :
discrete cosine transforms; video coding; videotelephony; DCT coefficient blocks; all-zero DCT coefficients; discrete cosine transform; early detection; quantisation; very low bit rate video coding; videophone applications;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010171
