VIDEO SIGNAL DIGITAL PROCESSING CIRCUIT AND METHOD

摘要

The circuit comprises an A/D converter (2) for converting an input analog video signal employing the NTSC or PAL system into a digital video signal, and a frequency converter (3) for generating a signal at sampling frequency f5 and converting a chrominance subcarrier frequency of the digital video siganl into a frequency f5/4. A decimation circuit (5) perfoms a third decimation process w.r.t. the output signal of the frequency converter by extracting samples with an interval of two samples. A signal processing circuit (6) subjects an output signal of the decimation circuit to a predetermined signal processing.