Signal recording/reproducing method and apparatus in which key information for descrambling is recorded in an area on the signal recording medium
US5897218A · kind A · utility
21Cited by
9References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Jun 2, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/926
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
By receiving a key signal for descrambling before reproducing a program signal so as to record the scrambled program signal as it is and descramble and view it by a decoder at the time of reproducing or by reading and reproducing the record, a signal recording/reproducing method and apparatus therefor wherein a possibility that a program which is distributed for specified viewers with payment is viewed by the public at an optional location without payment is eliminated and on the other hand, a viewer can view a broadcasted program freely at any time he wants is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.