Data processing device for FM multi-channel broadcasting
US5835499A · kind A · utility
5Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Sep 10, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03866
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A scrambling key is generated from demodulated and error-corrected FM demodulation data for use in descrambling. During this process, if error correction has not been normally conducted to an object data packet, a subsequent descrambling operation is not executed to that data packet. In addition, a descrambling operation is not carried out if the object data packet is a parity packet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.