An adaptive ghost processor for broadcast television

An adaptive recursive ghost processor subsystem, a smart system that minimizes TV ghosts and transmission distortions without producing new picture artifacts, is described. The ghost canceller structure and the processing algorithm are very efficient in the number of taps, performance, and convergence speed. The subsystem requires a training signal in the vertical interval and performs the ghost reduction in the baseband. A complex IIR (infinite impulse response) configuration with a nonlinear adaptation algorithm is used. The processor is usable in digital NTSC (National Television System Committee) and EDTV/HDTV (extended-definition/high-definition TV) receivers, and is intended for the reception of vestigial-sideband-format VHF/UHF cable and broadcast video distribution