Title :
DCT information recovery of erroneous image for MPEG-2
Author :
Cao, Jihua ; Li, Fengting
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
In this paper, a novel error concealment technique based on the discrete cosine transform (DCT) coefficients recovery is presented, and the estimating method of DC and low frequency coefficients is described in detail. The proposed technique makes full use of the neighboring information around the missing blocks, instead of only considering a row of pixels. The proposed algorithm is simple and is applicable to any unitary block-transform and is very effective for recovering the DC and low frequency coefficients. Simulation results show that the quality of recovered images is significantly improved in different marcoblock loss (MB) rate.
Keywords :
discrete cosine transforms; video coding; DCT information recovery; MPEG-2; discrete cosine transform coefficients recovery; erroneous image; error concealment technique; estimating DC coefficients; estimating low frequency coefficients; marcoblock loss rate; moving picture experts group; unitary block transform; Discrete cosine transforms; Error correction; Forward error correction; Frequency estimation; Image coding; Image reconstruction; Image restoration; Propagation losses; Streaming media; Video compression;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281075
