Title :
Reconstructing lost video data in a lapped orthogonal transform based coder
Author :
Haskell, Paul ; Messerschmitt, David
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
Abstract :
Techniques for hiding defects caused by lost blocks of lapped orthogonal transform (LOT) coefficients are proposed and compared. By properly enhancing reconstructed blocks, a video system can transmit pleasing images in spite of frequent asynchronous transfer mode (ATM) network losses. The mathematics of LOT calculation suggest several reconstruction strategies. Standard signal-processing techniques such as mean-square-error minimization, time-domain filtering, and LOT-domain coefficient averaging are also investigated and simulated. Comments on the performance of these recovery methods for moving video sequences as well as for single frames are offered
Keywords :
encoding; packet switching; picture processing; visual communication; ATM video transmission; lapped orthogonal transform based coder; lost video data reconstruction; mean-square-error minimization; moving video sequences; time-domain filtering; Asynchronous transfer mode; Bit rate; Circuits; Decoding; Filtering; Hardware; Image reconstruction; Intelligent networks; Mathematics; Propagation losses; Time domain analysis; Video coding; Video compression; Video sequences; Video sharing;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.115903
