Patent ID: 6496229
Filing Date: 2002-12-17
Classification: H04N

Abstract:
A television receiver for receiving digital television signals, said television receiver comprising:a sample clock generator for generating a sample clock signal at a sample rate and for supplying a modular count of samples that are made in accordance with said sample clock signal; tuner circuitry for supplying a digital final intermediate-frequency signal in response to a received digital television signal as sampled in accordance with said sample clock signal; and digital synchrodyne circuitry for synchrodyning said digital final intermediate-frequency signal to baseband to supply an in-phase demodulation result and a quadrature-phase demodulation result, said digital synchrodyne circuitry including a digital complex multiplier constructed at least partly within read-only memory for generating said in-phase demodulation result and said quadrature-phase demodulation result as components of a complex product resulting from multiplication of said digital final intermediate-frequency signal by a complex digital carrier signal.