Title :
A ghost cancelation system for the NTSC television
Author_Institution :
Zoran Corp., Santa Clara, CA, USA
fDate :
11/1/1993 12:00:00 AM
Abstract :
A ghost canceler for the NTSC television system is described. A three-chip digital filter with a total of 648 taps is used to adaptively cancel the ghosts. An external digital signal processor analyzes the ghosting scenario and provides the optimal set of coefficients for the filter. An interrupt driven scheme is designed to minimize the system memory requirement even when a large number of samples are needed to reduce noise. The tests show that the system can cancel the off-the-air ghosts with good performance
Keywords :
adaptive filters; digital filters; digital signal processing chips; interference suppression; television interference; television systems; NTSC television system; adaptive cancellation; digital filter; digital signal processor; filter coefficients; ghost cancelation system; interrupt driven scheme; noise reduction; off-the-air ghosts; system memory; Adaptive filters; Digital filters; Finite impulse response filter; IIR filters; Modems; Noise cancellation; Radio access networks; System testing; TV broadcasting; Transfer functions;
Journal_Title :
Consumer Electronics, IEEE Transactions on
