Phase-adjustment processing for broadcast channel signals
OwnerLarry Silver, Vyacheslav Shyshkin +2inventors
InventorsLarry Silver, Vyacheslav Shyshkin, Edmund Tam, Gary Cheng
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Abstract
Various embodiments are described herein for a universal television receiver that is capable of processing a television channel signal to provide phase-adjusted video information for the desired television channel signal.
Claims21
A carrier recovery block for processing an input signal to provide phase-adjusted information for a desired channel signal that is broadcast according to an analog broadcast standard, wherein the carrier recovery block comprises:
- a carrier recovery filter for filtering the input signal to produce a filtered carrier signal;
- a first phase rotator coupled to the carrier recovery filter for receiving the filtered carrier signal and providing a first phase adjustment to produce a phase-adjusted filtered carrier signal;
- a Vestigial Side Band (VSB) filter for filtering the input signal to produce filtered information;
- a second phase rotator coupled to the VSB filter for receiving the filtered information and providing a second phase adjustment to produce the phase adjusted information;
- and
- a carrier recovery block coupled to the first and second phase rotators, the carrier recovery block being configured to process the phase-adjusted filtered carrier signal to compensate for phase perturbations and to produce a phase control signal that is provided to the first and second phase rotators to control an amount of the first and second phase adjustments.
A method of processing an input signal to provide phase-adjusted information for a desired channel signal that is transmitted according to an analog broadcast standard, wherein the method comprises:
- filtering the input signal to produce a filtered carrier signal;
- applying a first phase adjustment to the filtered carrier signal to produce a phase-adjusted filtered carrier signal;
- filtering the input signal to produce filtered information;
- applying a second phase adjustment to the filtered information to produce phase-adjusted information;
- and
- processing the phase-adjusted filtered carrier signal to compensate for phase perturbations and to produce a phase control signal to control an amount of the first and second phase adjustments.
Dependencies are inferred from the claim text.