The application of 2 - D nite - precision IIR lters to enhanced

The goal of this paper is to study the application of two-dimensional (2-D) nite-precision innnite impulse response (IIR) lters to enhanced NTSC coding. It is well-known that suitable two-or three-dimensional digital ltering greatly improves the quality of NTSC pictures by suppressing the interference between the luminance Y and the chrominances I, Q. Thus far, 2-D and 3-D nite impulse response (FIR) lters have been used to reduce or eliminate these cross eeects. To achieve good performance, however, they require many coeecients. Since, in general, IIR lters need fewer coeecients to approximate a given magnitude response, we investigate here the possibility of applying 2-D IIR lters to the NTSC encoding/decoding. We also study the feasibility of using digital lters for NTSC channel ltering; this would permit a digital-only encoder. To design suitable lters, we use a recently proposed method based on multiple constraint optimization and simulated annealing. We propose a new implementation structure for the IIR lters that diiers from the zero-phase FIR structure. We simulate the full NTSC coding chain, and compare the resulting images for both lter types. reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.