Title :
Image processing techniques for blind TV ghost cancellation
Author :
Lei, Zhichun ; Appelhans, Peter ; Schröder, Hartmut
Author_Institution :
Dortmund Univ., Germany
Abstract :
This paper describes a technique to ghosts cancellation without a ghost cancellation reference signal. The existing vertical edges in TV image are used to estimate the channel characteristics. With the estimating results, the coefficients of the equalizer are updated. A method to speed up the convergence is given. The equalizer structure for cancelling all kinds of ghosts is discussed too. A new improved solution is achieved by interpreting the TV synchronisation signal as a genuine edge
Keywords :
convergence of numerical methods; equalisers; image processing; interference suppression; synchronisation; telecommunication channels; television interference; video signal processing; TV image; TV synchronisation signal; blind TV ghost cancellation; channel characteristics estimation; convergence; edge; equalizer coefficients updating; equalizer structure; ghosts cancellation; image processing; vertical edges; Amplitude estimation; Convergence; Delay estimation; Equalizers; Histograms; Image edge detection; Image processing; Parameter estimation; Phase estimation; TV;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.595311
