Title :
Frequency domain ghost cancellation using small FFT´s
Author :
Djoko, K.M. ; Palicot, J.
Author_Institution :
Centre Commun d´´Etudes de Telediffusion et Telecommun., Cesson Sevigne, France
Abstract :
A ghost canceller capable of achieving long delays is described method of filtering in the frequency domain using FFTs (fast Fourier transforms) is implemented by means of a decimation technique. This technique makes use of temporal windowing, frequency subsampling, and automatic selection of the number of filters required. It is thus possible to correct echoes even at high sampling frequencies. A wide variety of structure configurations are possible, depending on the results being sought
Keywords :
delays; fast Fourier transforms; filtering and prediction theory; frequency-domain analysis; interference suppression; television interference; FFT; automatic filter selection; decimation technique; delays; echo correction; fast Fourier transforms; frequency domain; frequency subsampling; ghost canceller; sampling frequencies; temporal windowing; Cable TV; Communication cables; Delay; Filtering algorithms; Finite impulse response filter; Frequency domain analysis; Image sampling; Sampling methods; Signal processing; TV broadcasting;
Journal_Title :
Consumer Electronics, IEEE Transactions on
