Method and apparatus for combating co-channel NTSC interference for digital TV transmission using a bank of rejection filters
US5745187A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1995 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Dec 21, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/1045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
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 selecto…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.