Polyphase FIR Filters for the Demodulation of Chrominance Signals

Document Type

Article

Publication Date

1-1-1991

Abstract

One important function of a digital video system is the decoding of the composite video signal into luminance and chrominance components. This paper presents an estimation scheme and its polyphase finite-duration impulse-response (FIR) filter implementation for the demodulation of composite chrominance signal into color difference components such as in-phase (I) and quadrature-phase (Q) components. The scheme applies to any system whose sampling frequency is related to the color subcarrier frequency by a rational factor. The paper also shows that at the most popular, yet in many applications over designed sampling frequency of four times subcarrier frequency, the demodulation scheme degenerates into the well known scheme of 2-to-1 subsampling, sign reversal, and interpolation. © 1991 IEEE

Identifier

0026221240 (Scopus)

Publication Title

IEEE Transactions on Circuits and Systems for Video Technology

External Full Text Location

https://doi.org/10.1109/76.97990

e-ISSN

15582205

ISSN

10518215

First Page

279

Last Page

288

Issue

3

Volume

1

This document is currently not available here.

Share

COinS