Television audience monitoring system and apparatus and method of aligning a magnetic pick-up device
US6484316B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1998 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Oct 14, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H60/58
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
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 synchronization and audio signals radiated from a television set, as well as an audio test signal directly provided by a pattern generator. The signal strength meter determines parameters such as a phase stability of the vertical synchronization signal detected by the pick-up device, a level of the audio signal detected by the pick-up device, an audio phase measurement of the audio signal sensed by the pick-up device with respect to an audio test signal input directly to the signal strength meter, and an audio noise floor measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.