| Patent Number |
Title Of Patent |
Date Issued |
| 6567978 |
Television audience monitoring system and method employing display of cable converter box |
May 20, 2003 |
| A display interface device and method for determining a currently tuned-to channel of a set-top converter box having an electronic display that indicates the currently tuned-to channel via seven-segment display elements in response to drive signals provided thereto by the set-top con |
| 6484316 |
Television audience monitoring system and apparatus and method of aligning a magnetic pick-up de |
November 19, 2002 |
| A signal strength meter for use in determining an optimal position of a magnetic pick-up device. The signal strength meter includes a vertical synchronization processing circuit, and audio processing circuit and a power and control circuit. The signal strength meter receives vertical |
| 6405370 |
Television audience monitoring system and method employing tuner interface of set-top converter |
June 11, 2002 |
| A tuner interface device and method for determining a currently tuned-to channel of a set-top converter box having an electronic tuner that is addressable over a bus within the set-top converter box. The tuner interface device includes an electrical connection to the electronic tuner |
| 6085066 |
Non-video path data collection device |
July 4, 2000 |
| A system performs audio matching to determine the channel to which a television set is tuned. In one embodiment, the system feeds two audio signals to primary and secondary windings of an audio transformer, and employs an output signal taken from a center tap on the primary winding to |
| 5881360 |
Non-video path data collection device |
March 9, 1999 |
| A system performs audio matching to determine the channel to which a television set is tuned. In one embodiment, the system feeds two audio signals to primary and secondary windings of an audio transformer, and employs an output signal taken from a center tap on the primary winding to |
