Digital signal receiver capable of receiving data encrypted and transmitted in online processing
US5784462A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Aug 22, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a decoding processing circuit of a digital signal receiver, a first comparison circuit detects that a prefix of packet data is inputted in a shift register on the basis of a count value of a counter circuit. In response to the result of detection, a pseudo-random binary sequence generation circuit outputs a pseudo-random binary sequence on the basis of a data group number and a data packet number outputted from the shift register and key data previously extracted by a key data fetch circuit. When a second comparison circuit detects that block data in the data packet is inputted in the shift register, an exclusive OR circuit exclusively ORs the pseudo-random binary sequence with receive data, so that decoded data is inputted in the shift register.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.