System and method for modifying broadcast signals in closed circuit systems
US8131133B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 16, 2002 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Dec 1, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S358/908
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method are disclosed for modifying a television broadcast signal. In one embodiment, the system includes a memory that stores an alternate commercial signal, and a controller that is coupled to the memory and receives the broadcast signal. The broadcast signal includes a program signal and commercial signals. The controller substitutes the alternate commercial signal for one of the commercial signals upon determining that a first condition has been met, for example, upon the sensing two video/audio blank periods in the broadcast signal separated by a predetermined time period. In another embodiment, a broadcast signal including a series of screen signals alternating with a series of blanking signals is embedded, at an upstream location, with additional information relating to alternate commercials or commands during the blanking signals. At a downstream location, a controller processes the additional information and modifies the broadcast signal in response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.