Title :
A TV ghost canceller using FPGA-based FIR filters
Author :
Pora, Wanchalerm ; Siriluangtong, Pahol
Author_Institution :
Electr. Eng. Dept., Chulalongkom Univ., Bangkok, Thailand
Abstract :
This paper presents a PAL TV ghost canceller that employs a ghost cancellation reference signal (GCR signal) recommended in an ITU standard. The LMS algorithm is chosen to find the channel inverse, which is estimated by a 256-tap FIR filter. The emphasis is upon a resource sharing technique, which increases utilization of the multipliers by eight times. To test the canceller, a TV ghost emulator is constructed. From subjective tests, the canceller can remove the ghost whose power is lower than -6 dB compared to that of the main signal, providing its delay is lower than 10 μs.
Keywords :
FIR filters; digital filters; field programmable gate arrays; interference suppression; least mean squares methods; television interference; television receivers; television reception; video signal processing; FPGA-based FIR filters; ITU standard recommended reference signal; LMS algorithm; PAL TV ghost canceller; TV ghost emulator; channel inverse; ghost cancellation reference signal; multipliers; resource sharing technique; Delay; Digital signal processing chips; Field programmable gate arrays; Finite impulse response filter; Least squares approximation; Noise cancellation; Signal processing; TV broadcasting; TV receivers; Testing;
Conference_Titel :
Circuits and Systems, 2002. APCCAS '02. 2002 Asia-Pacific Conference on
Print_ISBN :
0-7803-7690-0
DOI :
10.1109/APCCAS.2002.1115233