U.S. Philips Corporation

Philips Electronics North America Corporation

Aldo G Cugnini

Samir N Hulyalkar

David L Rossmere

Monisha Ghosh

A device for indicating the quality of a received digital broadcast video signal in a digital television receiver includes circuitry for determining the amount of multipath interference. The device generates a display graph indicative of the signal quality. Optionally, the device may also consider, in determining the signal quality, whether a demodulator in the television receiver is able to lock onto a sync sequence in the video signal, whether an adaptive equalizer also in the television receiver is able to lock onto the sync sequence, and the amount of errors being corrected in an error correction circuit in the television receiver.

Device for indicating the received signal quality in a digital television receiver

A television receiver for reducing a co-channel interference in a digital television signal transmitted by a transmitter, wherein the digital television signal includes an encoded digital television signal component, a co-channel interference component, and a noise component, and wherein a precoder, for which precoding is implemented at the television transmitter, encodes the digital television signal. The receiver includes a receiver for receiving the transmitted digital television signal and for providing a received output signal. A filter block is provided for filtering the received output signal to reduce the co-channel interference component thereof. The filter block includes a plurality of rejection filters and a device for enabling a desired one of the plurality of rejection filters in response to a selection control signal, the enabled rejection filter corresponding to an optimal rejection filter for the precoder for which precoding is implemented at the television transmitter. The filter block provides a filtered output signal. A detector, responsive to the received output signal, is provided for detecting information regarding the precoder. The detector includes a selector for selecting the desired one of the plurality of rejection filters in response to the detected information, and provides the selection control signal for the filter block. Lastly, a device, responsive to the filtered output signal, produces a decoded digital television signal.

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Ossining, NY, United States of America

Aldo G Cugnini