Simulcast transmission system
US4317220A · kind A · utility
35Cited by
7References
3Claims
0Family size
Inventor
Key dates
| Filing date | Feb 5, 1979 |
| Grant date | Feb 23, 1982 |
| Priority date | — |
| Expiry date | Feb 5, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H20/67
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A simulcast transmission system is disclosed. The system comprises a master station including means for generating and transmitting over a medium an audio signal containing a message signal and a pilot frequency signal inserted into the audio signal band, and at least two slave stations adapted to receive the audio signal transmitted over the medium and including a radio frequency generator of the phase locked loop type and means for isolating the pilot frequency signal from the audio signal and for synchronizing the frequency of the radio frequency generator with such pilot frequency signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.