Mathias K Muller Deceased1134 Elm St, Lansdale, PA 19446

2003001, Jan 23, 2003

Jul 23, 2001

09/909978

David Zeidler - Warrington PA, US
Joseph Petry - Philadelphia PA, US
Mathias Muller - Line Lexington PA, US

General Instrument Corporation

H04N007/173
H04N007/16
H04N005/50

725/151000, 348/735000, 725/139000, 725/131000

A system and method for adjusting a video frequency response of a set-top terminal using a video frequency response filter. The video frequency response filter is included in a video processing subsystem. The video frequency response filter adjusts the video frequency response of the set-top terminal by using a set of filter coefficients determined by a microprocessor subsystem. The set of filter coefficients can be determined by various methods. One method is by measuring the frequency response degradation of the set-top terminal without the video frequency response filter installed in the set-top terminal. Another method is to measure the amplitude of a color burst signal included in the video input signal. Yet another method is to measure the amplitudes of a multi-burst signal included in the video input signal. The invention compensates for imperfections in the set-top circuit components and enables the set-top terminal to consistently meet the specification requirements for channel flatness without increasing the cost of the components.

2009018, Jul 16, 2009

Jan 10, 2008

11/972617

Mathias Anton Muller - Line Lexington PA, US
Michael Hauger - Philadelphia PA, US

GENERAL INSTRUMENT CORPORATION - Horsham PA

H04N 5/50

348729, 348E05097

A receiver is provided for extracting a digitally encoded transport stream from a broadband signal containing a plurality of channels. The receiver includes an input for receiving the broadband signal and a tuner for selecting a selected channel from the broadband signal. The receiver also includes a filter arrangement having a high pass filter and a low pass filter selectively coupling the input to the tuner such that an unselected one of the filters is coupled to ground. A demodulator is provided for demodulating a digitally encoded transport stream from the selected channel.