Compatible four channel radio broadcast and receiving system
US3937896A · kind A · utility
1Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1974 |
| Grant date | Feb 10, 1976 |
| Priority date | — |
| Expiry date | Apr 18, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H20/89
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A compatible four channel system for use in conjunction with a radio transmission system for transmitting four individual audio signals over a medium having primary and secondary information channels and first and second subsidiary information channels, the primary and secondary channels carrying information that is consistent and compatible with existing monophonic and stereophonic standards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.