Patent ID: 6147713
Filing Date: 2000-11-14
Classification: H04N

Abstract:
A digital signal processor for recovering video and audio signals according to different analog and digital broadcast standards, comprising:a video demodulator having a first path for coupling a modulated video signal to a mixer via a Nyquist filter, and a second path for coupling said modulated video signal to a carrier recovery circuit without passing through said Nyquist filter, said modulated video signal conforming to a particular broadcast standard;said carrier recovery circuit (i) recovering a carrier frequency signal for use by said mixer in providing a baseband video signal and (ii) detecting an audio intercarrier present in said modulated video signal; anda programmable sound strip filter for filtering audio components from said baseband video signal in accordance with said particular broadcast standard to provide a demodulated video output;wherein said audio intercarrier is provided as an output from said carrier recovery circuit for subsequent recovery of audio in accordance with said particular broadcast standard.