Broadcast acknowledgement method and system
US4225967A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1978 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Jan 9, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/081
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A broadcast acknowledgement method and system wherein a digital information signal, generated in order to indicate the content with regard to a present broadcast program (for example, a commercial broadcast program on television, radio or CATV), is superimposed on the voice signal of said program for broadcast and the composite signal transmitted to the receiving station, where it is processed to retrieve the digital information signal. Thereby, it can be confirmed whether or not the particular program has been broadcast or not. The method generally comprises the steps of removing the particular frequency band of the voice signal, generating the digital information signal by using some of the desired frequency signals within the particular frequency band of the voice signal, superimposing the digital information signal on the voice signal, transmitting the composite signal, extracting the digital information signal from the received signal at the receiving side, and processing the digital information signal so extracted to identify the particular program broadcast, and thus to obtain broadcast acknowledgement information such as sponsor's name, performers' name, time of broadcastin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.