H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/21 (2006.01) H04N 5/073 (2006.01) H04N 5/445 (2006.01) H04N 7/08 (2006.01) H04N 11/24 (2006.01) H03D 1/22 (2006.01) H03D 1/24 (2006.01)
Patent
CA 2086239
High definition or enhanced television signals include supplementary information which is double-sideband modulated in quadrature with the picture carrier, and passed through an inverse Nyquist filter (222) before being combined (224) with a con- ventional vestigial sideband (221) modulated main video signal. A receiver which recovers both the main video signal and the supplementary information processes the received video signal through an IF filter (228) having a vestigial sideband frequency response characteristic. Two synchronous detectors (230, 232) recover in-phase and quadrature phase signal components from the filtered television signals, these recovered signals each include, quadrature crosstalk distortion components from the other signal. The crosstalk from the supplementary signal into the main signal is cancelled by filtering (246) the recovered quadrature signal and adding (244) the result to the recovered in-phase signal. This filtering also equalizes the in-phase signal by converting the quadrature distortion components in the recovered quadrature signal into reinforcing signal components in the in-phase signal. This signal recovery system is advantageously used with a ghost concellation system.
Gibson James J.
Jonnalagadda Krishnamurthy
Craig Wilson And Company
Rca Licensing Corporation
LandOfFree
Method and apparatus for canceling quadrature distortion as... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for canceling quadrature distortion as..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for canceling quadrature distortion as... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1587616